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NSR database version of April 11, 2024.

Search: Author = M.Leino

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2024IL01      Phys.Lett. B 848, 138371 (2024)

A.Illana, R.M.Perez-Vidal, D.Stramaccioni, J.J.Valiente-Dobon, T.R.Rodriguez, L.M.Robledo, A.Poves, K.Auranen, O.Beliuskina, C.Delafosse, T.Eronen, Z.Ge, S.Geldhof, W.Gins, T.Grahn, P.T.Greenlees, H.Joukainen, R.Julin, H.Jutila, A.Kankainen, M.Leino, J.Louko, M.Luoma, D.Nesterenko, J.Ojala, J.Pakarinen, P.Rahkila, P.Ruotsalainen, M.Sandzelius, J.Saren, J.Uusitalo, G.L.Zimba

Octupole correlations in the N = Z + 2 = 56 110Xe nucleus

NUCLEAR REACTIONS 54Fe(58Ni, 2n)110Xe, E=255 MeV; measured reaction products, Eγ, Iγ, Eα, Iα; deduced γ-ray energies and intensities, J, π, an octupole band . Comparison with systematics, theoretical calculations using the symmetry-conserving configuration-mixing method, based on a Gogny energy density functional. The Recoil-Decay Tagging (RDT) technique, the Mass Analysing Recoil Apparatus (MARA) vacuum mode-recoil separator, the K130 cyclotron at the Accelerator Laboratory of the University of Jyvaskylaa (JYFL), Finland.

doi: 10.1016/j.physletb.2023.138371
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2023AU03      Phys.Rev. C 108, L011303 (2023)

K.Auranen, P.Siwach, P.Arumugam, A.D.Briscoe, L.S.Ferreira, T.Grahn, P.T.Greenlees, A.Herzan, A.Illana, D.T.Joss, H.Joukainen, R.Julin, H.Jutila, M.Leino, J.Louko, M.Luoma, E.Maglione, J.Ojala, R.D.Page, J.Pakarinen, P.Rahkila, J.Romero, P.Ruotsalainen, M.Sandzelius, J.Saren, A.Tolosa-Delgado, J.Uusitalo, G.Zimba

Probing triaxiality beyond the proton drip line: Spectroscopy of 147Tm

NUCLEAR REACTIONS 92Mo(58Ni, 2np)147Tm, E=250 MeV; measured Eγ, Iγ, fusion-evaporation residues, recoils, γγ-coin, (recoils)γ-coin, γ(θ). 147Tm; deduced levels, J, π, angular distribution coefficients, high-spin states, spin-parity of the isomeric proton decaying state, triaxiality evidences for ground-state ans isomeric state, configurations. Comparison to nonadiabatic quasiparticle model calculation. Recoil-decay tagging study using the vacuum-mode recoil separator MARA coupled with the JUROGAM3 g-ray spectrometer at Accelerator Laboratory of University of Jyvaskyla.

RADIOACTIVITY 147mTm(p) [from 92Mo(58Ni, 2np), E=250 MeV]; measured Eγ, Iγ, recoils, γγ-coin, (recoils)γ-coin; deduced T1/2 of the 5/2+ isomeric state proton decay. Recoil-decay tagging study using the vacuum-mode recoil separator MARA coupled with the JUROGAM3 g-ray spectrometer at Accelerator Laboratory of University of Jyvaskyla.

doi: 10.1103/PhysRevC.108.L011303
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2023BR10      Phys.Lett. B 847, 138310 (2023)

A.D.Briscoe, R.D.Page, J.Uusitalo, D.T.Joss, M.A.M.AlAqeel, B.Alayed, B.Andel, S.Antalic, K.Auranen, H.Ayatollahzadeh, H.Badran, L.Barber, G.Beeton, M.Birova, V.Bogdanoff, R.M.Clark, J.G.Cubiss, D.M.Cullen, J.Deary, U.Forsberg, T.Grahn, P.T.Greenlees, J.B.Hilton, A.Illana, H.Joukainen, D.S.Judson, R.Julin, H.Jutila, J.M.Keatings, M.Labiche, M.Leino, M.C.Lewis, J.Louko, M.Luoma, I.Martel, A.McCarter, P.P.McKee, P.Mosat, S.N.Nathaniel, O.Neuvonen, D.O'Donnell, J.Ojala, C.A.A.Page, A.M.Plaza, J.Pakarinen, P.Papadakis, E.Parr, J.Partanen, P.Rahkila, P.Ruotsalainen, M.Sandzelius, J.Saren, B.Saygi, J.Smallcombe, J.F.Smith, J.Sorri, C.M.Sullivan, S.Szwec, H.Tann, A.Tolosa-Delgado, E.Uusikyla, M.Venhart, L.J.Waring, G.Zimba

Decay spectroscopy at the two-proton drip line: Radioactivity of the new nuclides 160Os and 156W

RADIOACTIVITY 160Os(α), 156W(β+), (EC), 156Ta(p) [from 106Cd(58Ni, X)160Os, 102Pd(58Ni, X)156Ta, E=310, 294 MeV]; measured decay products, Eα, Iα, Ep, Ip, Eβ, Iβ; deduced α-particles energies, T1/2, an improved value for the half-life of the proton-decaying high-spin isomeric state. Comparison with available data. The recoil separator MARA, the Accelerator Laboratory of the University of Jyvaskyla.

doi: 10.1016/j.physletb.2023.138310
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2023KO10      Phys.Rev. C 107, 064312 (2023)

H.Kokkonen, K.Auranen, J.Uusitalo, S.Eeckhaudt, T.Grahn, P.T.Greenlees, P.Jones, R.Julin, S.Juutinen, M.Leino, A.-P.Leppanen, M.Nyman, J.Pakarinen, P.Rahkila, J.Saren, C.Scholey, J.Sorri, M.Venhart

Properties of the new α-decaying isotope 190At

RADIOACTIVITY 190At(α)[from 109Ag(84Sr, 3n), E=380, 390 MeV, followed by the separation of reaction products using the gas-filled recoil separator RITU at the K-130 cyclotron of the University of Jyvaskyla]; measured fusion-evaporation residues, (implants)α-correlated events, Eα, T1/2 of 190At decay, protons using the GREAT spectrometer with multiwire proportional counter (MWPC) and double-sided silicon strip detectors (DSSD). 190At; deduced new isotope, Jπ for the ground state, Q(α), mass excess, Q(p), reduced decay width and α-decay hindrance factor using Rasmussen method, no evidence for the observation of protons; discussed logistics of proton emission from the decay of 190At. Systematics of experimental ground-state α-decay energies Q(α) of 105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124At, and compared with predictions from various mass models.

doi: 10.1103/PhysRevC.107.064312
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2023PE11      Phys.Rev. C 108, 014317 (2023)

C.M.Petrache, J.Uusitalo, A.D.Briscoe, C.M.Sullivan, D.T.Joss, H.Tann, O.Aktas, B.Alayed, M.A.M.Al-Aqeel, A.Astier, H.Badran, B.Cederwall, C.Delafosse, A.Ertoprak, Z.Favier, U.Forsberg, W.Gins, T.Grahn, P.T.Greenlees, X.T.He, J.Heery, J.Hilton, S.Kalantan, R.Li, P.M.Jodidar, R.Julin, S.Juutinen, M.Leino, M.C.Lewis, J.G.Li, Z.P.Li, M.Luoma, B.F.Lv, A.McCarter, S.Nathaniel, J.Ojala, R.D.Page, J.Pakarinen, P.Papadakis, E.Parr, J.Partanen, E.S.Paul, P.Rahkila, P.Ruotsalainen, M.Sandzelius, J.Saren, J.Smallcombe, J.Sorri, S.Szwec, L.J.Wang, Y.Wang, L.Waring, F.R.Xu, J.Zhang, Z.H.Zhang, K.K.Zheng, G.Zimba

High-K three-quasiparticle isomers in the proton-rich nucleus 129Nd

doi: 10.1103/PhysRevC.108.014317
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2023ZH03      Phys.Rev. C 107, 014308 (2023)

W.Zhang, B.Cederwall, M.Doncel, O.Aktas, A.Ertoprak, C.Qi, T.Grahn, B.S.Nara Singh, D.M.Cullen, D.Hodge, M.Giles, S.Stolze, K.Auranen, H.Badran, T.Braunroth, T.Calverley, D.M.Cox, Y.D.Fang, P.T.Greenlees, J.Hilton, E.Ideguchi, R.Julin, S.Juutinen, M.Kumar Raju, M.Leino, H.Li, H.Liu, S.Matta, P.Subramaniam, V.Modamio, J.Pakarinen, P.Papadakis, J.Partanen, C.M.Petrache, P.Rahkila, P.Ruotsalainen, M.Sandzelius, J.Saren, C.Scholey, J.Sorri, M.J.Taylor, J.Uusitalo, J.J.Valiente-Dobon

Decay spectroscopy of 171, 172Os and 171, 172, 174Ir

NUCLEAR REACTIONS 92Mo(83Kr, X)171/172Os/171/172/174Ir, E=383 MeV; measured reaction products, recoils, Eα , Iα, Eγ, Iγ, γγ-coin, (recoil)αγ-coin. 171,172Os, 171,172,174Ir; deduced levels, J, π, δ. Newly identified α-decay branch from the bandhead (isomeric state) of the νi13/2 band in 171Os with competition between α, β, and electromagnetic decays. RITU gas-filled ion separator, GREAT spectrometer and JUROGAM II HPGe array at K130 cyclotron (JYFL).

RADIOACTIVITY 171,171m,172Os, 171m,172,172m,174,174mIr(α);171mOs(IT)[from 92Mo(83Kr, X), E=383 MeV]; measured Eα, Iα, Eγ, Iγ, x-rays, αγ-coin; deduced T1/2, branching ratios, Q values, formation probabilities, hindrance factor, reduced widths. 167,168W, 167,168,170; deduced levels, J, π, transitions. 180Hg, 176Pt, 172Os, 168W; calculated total Routhian surface, potential energy surface. Discussed the correlation between α-decay hindrance factor and shape changes. Reaction products implanted into two adjacently mounted double-sided silicon strip detectors (DSSDs) used tp measure α, while γ-rays were detected by double sided planar HPGe. Beam from K10 cyclotron (JYFL).

doi: 10.1103/PhysRevC.107.014308
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2022AU01      Phys.Rev.Lett. 128, 112501 (2022)

K.Auranen, A.D.Briscoe, L.S.Ferreira, T.Grahn, P.T.Greenlees, A.Herzan, A.Illana, D.T.Joss, H.Joukainen, R.Julin, H.Jutila, M.Leino, J.Louko, M.Luoma, E.Maglione, J.Ojala, R.D.Page, J.Pakarinen, P.Rahkila, J.Romero, P.Ruotsalainen, M.Sandzelius, J.Saren, A.Tolosa-Delgado, J.Uusitalo, G.Zimba

Nanosecond-Scale Proton Emission from Strongly Oblate-Deformed 149Lu

RADIOACTIVITY 149Lu(p) [from 96Ru(58Ni, 4np)149Lu, E=310, 320 MeV]; measured decay products, Eγ, Iγ, Ep, Ip; deduced energy spectrum of the protons, proton decay T1/2, Q-value. Comparison with theoretical calculations. The MARA vacuum-mode recoil separator, the K130 cyclotron of University of Jyvaskyla.

doi: 10.1103/PhysRevLett.128.112501
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2022BA42      Phys.Rev. C 106, 064324 (2022)

M.Balogh, E.Jajcisinova, M.Venhart, A.Herzan, J.L.Wood, D.T.Joss, F.A.Ali, K.Auranen, S.Banovska, M.Birova, R.J.Carroll, D.M.Cox, J.G.Cubiss, T.Davis, M.C.Drummond, P.T.Greenlees, T.Grahn, A.Gredley, J.Henderson, U.Jakobsson, R.Julin, S.Juutinen, G.Kantay, J.Konki, P.Konopka, M.Leino, V.Matousek, A.K.Mistry, C.G.McPeake, D.O'Donnell, R.D.Page, J.Pakarinen, P.Papadakis, J.Partanen, P.Peura, P.Rahkila, P.Ruotsalainen, M.Sandzelius, J.Saren, B.Saygi, M.Sedlak, D.Seweryniak, C.Scholey, J.Sorri, A.Spacek, S.Stolze, M.Taylor, A.Thornthwaite, J.Uusitalo, M.Veselsky, S.Vielhauer, F.P.Wearing

New collective structures in 179Au and their implications for the triaxial deformation of the 178Pt core

NUCLEAR STRUCTURE 100Ru(82Kr, 2np)179Au, E=352 MeV; measured reaction products, Iγ, Eγ, γγ-coin, γγγ-coin, particleγ-coin. 179Au; deduced levels, J, π, δ, high-spin states, bands structure, rotational bands, configurations, T1/2 of newly discovered 1743-keV isomeric state; calculated levels, J, π, deformation parameters. Particle-plus-triaxial-rotor model (PTRM) calculations. Suggested strong triaxial deformation of proton-intruder states. RITU gas-filled separator coupled to JUROGAM-II array composed of 10 Eurogam Phase I type coaxial and 24 Euroball clover Ge detectors arranged into three rings and equipped with active BGO Compton-suppression shields. Beam from K130 cyclotron at Accelerator Laboratory of the University of Jyvaskyla.

doi: 10.1103/PhysRevC.106.064324
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2022BE24      Phys.Lett. B 834, 137479 (2022)

F.L.Bello Garrote, A.Lopez-Martens, A.C.Larsen, I.Deloncle, S.Peru, F.Zeiser, P.T.Greenlees, B.V.Kheswa, K.Auranen, D.L.Bleuel, D.M.Cox, L.Crespo Campo, F.Giacoppo, A.Gorgen, T.Grahn, M.Guttormsen, T.W.Hagen, L.Harkness-Brennan, K.Hauschild, G.Henning, R.-D.Herzberg, R.Julin, S.Juutinen, T.A.Laplace, M.Leino, J.E.Midtbo, V.Modamio, J.Pakarinen, P.Papadakis, J.Partanen, T.Renstrom, K.Rezynkina, M.Sandzelius, J.Saren, C.Scholey, S.Siem, J.Sorri, S.Stolze, J.Uusitalo

Experimental observation of the M1 scissors mode in 254No

NUCLEAR REACTIONS 208Pb(48Ca, 2n)254No, E=220, 222 MeV; 154Sm(48Ca, 6n)196Pb, E not given; measured Eγ, Iγ, prompt and recoil-gated γ-ray singles spectra, polarization asymmetries of discreet γ rays in 254No and 196Pb; deduced experimental γ-ray yield and compared with simulated γ spectra using RAINIER code, γ-strength function (γSF), B(M1), B(E1), widths, scissors mode of excitation in 254No. Comparison with BSFG + E1SLO + M1SLO model combination; tested parameters for the GDR and the spin-flip resonance by HFB calculations. Comparison of B(M1) strength with QRPA calculations.

doi: 10.1016/j.physletb.2022.137479
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2022BR08      Phys.Rev. C 106, 014602 (2022)

A.Bronis, F.P.Hessberger, S.Antalic, B.Andel, D.Ackermann, S.Heinz, S.Hofmann, J.Khuyagbaatar, B.Kindler, I.Kojouharov, P.Kuusiniemi, M.Leino, B.Lommel, R.Mann, K.Nishio, A.G.Popeko, B.Streicher, B.Sulignano, J.Uusitalo, M.Venhart, A.V.Yeremin

Decay studies of new isomeric states in 255No

RADIOACTIVITY 250Fm, 252,254,255No(α)[from 208Pb(48Ca, X), E=213.6, 218.4 MeV]; measured Eα. 255mNo(IT); measured Eγ, γ(ce)-coin, γ(ER)-coin; deduced levels, three micro-sec isomers in 255No, J, π, T1/2, multipolarities, Nilsson configurations. Comparison with level scheme of 257Rf from the decay of its isomer, and with theoretical calculations based on the mean-field models. 253mNo, 255mRf, 257mRf; deduced Nilsson configurations of high-K 3-qp isomeric states in N=151 and N=153 isotopes. Systematics of experimental and theoretical single-particle states in N=153 isotones of 247Pu, 249Cm, 251Cf, 253Fm, 255No, 257Rf, 259Sg, 261Hs.

doi: 10.1103/PhysRevC.106.014602
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2022OJ01      Commun. Phys. 5, 213 (2022)

J.Ojala, J.Pakarinen, P.Papadakis, J.Sorri, M.Sandzelius, D.M.Cox, K.Auranen, H.Badran, P.J.Davies, T.Grahn, P.T.Greenlees, J.Henderson, A.Herzan, R.-D.Herzberg, J.Hilton, U.Jakobsson, D.G.Jenkins, D.T.Joss, R.Julin, S.Juutinen, T.Kibedi, J.Konki, G.J.Lane, M.Leino, J.Liimatainen, C.G.McPeake, O.Neuvonen, R.D.Page, E.Parr, J.Partanen, P.Peura, P.Rahkila, J.Revill, P.Ruotsalainen, J.Saren, C.Scholey, S.Stolze, J.Uusitalo, A.Ward, R.Wadsworth

Reassigning the shapes of the 0+ states in the 186Pb nucleus

NUCLEAR REACTIONS 106Pd(83Kr, 3n)186Pb, E=365 MeV; measured reaction products, Eγ, Iγ, Eβ, Iβ; deduced γ-ray energies and intensities, J, π, partial level scheme, conversion-electron energy spectra, electric monopole transitions, B(E2), transitional quadrupole moments, triple shape coexistence. Sage+ritu+great instrumentation, the recoil-decay tagging technique. The Accelerator Laboratory of the University of Jyvaskyla.

doi: 10.1038/s42005-022-00990-4
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2022PA09      Phys.Rev. C 105, 034303 (2022)

E.Parr, J.F.Smith, P.T.Greenlees, P.A.Butler, K.Auranen, R.Chapman, D.M.Cox, D.M.Cullen, L.P.Gaffney, T.Grahn, E.T.Gregor, L.Grocutt, A.Herzan, R.-D.Herzberg, D.Hodge, U.Jakobsson, R.Julin, S.Juutinen, J.M.Keatings, J.Konki, M.Leino, P.P.McKee, C.McPeake, D.Mengoni, A.K.Mistry, B.S.Nara Singh, G.G.O'Neill, J.Pakarinen, P.Papadakis, J.Partanen, P.Peura, P.Rahkila, P.Ruotsalainen, M.Sandzelius, J.Saren, M.Scheck, C.Scholey, M.Siciliano, M.Smolen, J.Sorri, P.Spagnoletti, K.M.Spohr, S.Stolze, M.J.Taylor, J.Uusitalo

Single-particle states and parity doublets in odd-Z 221Ac and 225Pa from α-decay spectroscopy

RADIOACTIVITY 225Pa, 221Ac(α)[225Pa from 208Pb(20Ne, 2np), E=105 MeV, 221Ac from 208Pb(18O, 4np), E=95 MeV, 208Pb(20Ne, 2npα), E=105 MeV and 225Pa α decay]; 217Fr(α)[from 221Ac α decay]; 213At(α)[from 217Fr α decay]; measured reaction products, Eα, Iα, Eγ, Iγ, αγ-coin, summed α+ce(K); deduced T1/2 decays of ground states of 225Pa, 221Ac, 217Fr, 213At. 221Ac, 217Fr; deduced levels, J, π, α- and γ-branching ratios, total conversion coefficients, multipolarities, α-hindrance factors, configurations, parity-doublet states in 221Ac. 225Pa; deduced ground state J, π. Comparison with previous experimental data, and with model predictions. RITU gas-filled recoil separator, silicon strip detectors (DSSD) for ion implantation measurements and GREAT spectrometer combined with 3 HPGe clover detectors at the University of Jyvaskyla accelerator facility.

doi: 10.1103/PhysRevC.105.034303
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2021AU03      Phys.Rev. C 103, 054323 (2021)

K.Auranen, J.Uusitalo, H.Badran, T.Grahn, P.T.Greenlees, A.Herzan, U.Jakobsson, R.Julin, S.Juutinen, J.Konki, M.Leino, A.-P.Leppanen, G.O'Neill, J.Pakarinen, P.Papadakis, J.Partanen, P.Peura, P.Rahkila, P.Ruotsalainen, M.Sandzelius, J.Saren, C.Scholey, L.Sinclair, J.Sorri, S.Stolze, A.Voss

Isomeric 13 over 2+ (νi-1 13 over 2) state in 211Th

NUCLEAR REACTIONS 181Ta(36Ar, 5np)211Th, E=178-214 MeV; measured reaction products, recoil-α correlated events, x rays, conversion electrons, half-life of a micro-second isomer using RITU separator and a multiwire proportional counter (MWPC), and ions implanted into a double-sided silicon strip detector (DSSD) of the GREAT spectrometer at the K-130 cyclotron of University of Jyvaskyla. 211Th; deduced levels, J, π, isomer and its decay mode.

RADIOACTIVITY 211mTh(IT), (α)[from 181Ta(36Ar, 5np)211Th, E=178-214 MeV]; measured recoils-α correlated events, Eα, Iα, x rays, ce, half-life of isomer; deduced levels, J, π, configuration, α-decay branching ratio of isomer decay.

NUCLEAR REACTIONS 181Ta(36Ar, X)205Fr/206Fr/207Fr/208Fr/209Fr/207Ra/208Ra/209Ra/210Ra/206Ac/206mAc/207Ac/208Ac/209Ac/210Ac/211Ac/212Ac/213Ac/211Th/211mTh/212Th/213Th/211Pa/212Pa/213Pa, E=178-214 MeV; measured reaction products, Eα and decay time, as a function of the α-particle energy of the first decay event of a decay chain consisting of two to four decay events correlated with a recoil implantation event.

doi: 10.1103/PhysRevC.103.054323
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2021GI08      Phys.Rev. C 103, 044307 (2021)

S.A.Gillespie, A.Stott, A.N.Andreyev, J.G.Cubiss, M.Al Monthery, C.J.Barton, S.Antalic, K.Auranen, H.Badran, D.Cox, T.Grahn, P.T.Greenlees, A.Herzan, E.Higgins, R.Julin, S.Juutinen, J.Klimo, J.Konki, M.Leino, M.Mallaburn, J.Pakarinen, P.Papadakis, J.Partanen, P.M.Prajapati, P.Rahkila, M.Sandzelius, C.Scholey, J.Sorri, S.Stolze, R.Urban, J.Uusitalo, M.Venhart, F.Wearing

Identification of sub-μ isomeric states in the odd-odd nucleus 178Au

RADIOACTIVITY 178Au(IT), (α)[from 92Mo(88Sr, np)178Au, E=381 MeV, followed by separation of fragments using RITU separator and implanted into a double sided silicon detectors (DSSD), placed side by side of the GREAT spectrometer at the University of Jyvaskyla]; measured Eγ, Iγ, Eα, Iα, (recoil)γ- and γγ-coin, half-lives of two sub-microsec isomers, total conversion coefficients. 178Au; deduced levels, J, π, isomers, α branching ratios, multipolarities, E2/M1 mixing ratios, B(E1), B(E2), B(M1). 174,175,176,177,178Pt, 177,179Au, 178,179Hg(α); measured Eα within 7 s of implantation of evaporation residues in the DSSD.

doi: 10.1103/PhysRevC.103.044307
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2021GO26      Eur.Phys.J. A 57, 321 (2021)

T.Goigoux, Ch.Theisen, B.Sulignano, M.Airiau, K.Auranen, H.Badran, R.Briselet, T.Calverley, D.Cox, F.Dechery, F.Defranchi Bisso, A.Drouart, Z.Favier, B.Gall, T.Grahn, P.T.Greenlees, K.Hauschild, A.Herzan, R.-D.Herzberg, U.Jakobsson, R.Julin, S.Juutinen, J.Konki, M.Leino, A.Lightfoot, A.Lopez-Martens, A.Mistry, P.Nieminen, J.Pakarinen, P.Papadakis, J.Partanen, P.Peura, P.Rahkila, E.Rey-Herme, J.Rubert, P.Ruotsalainen, M.Sandzelius, J.Saren, C.Scholey, J.Sorri, S.Stolze, J.Uusitalo, M.Vandebrouck, A.Ward, M.Zielinska, P.Jachimowicz, M.Kowal, J.Skalski

First observation of high-K isomeric states in 249Md and 251Md

RADIOACTIVITY 249,251Md(IT) [from 203Tl(48Ca, 2n)249Md, E=219 MeV; 205Tl(48Ca, 2n)251Md, E=218 MeV]; measured decay products, Eα, Iα, Eβ, Iβ, Eγ, Iγ, β-α-coin.; deduced level energies, J, π, 3 quasi-particle high-K states, isomeric states T1/2. Comparison theoretical calculations. SAGE spectrometer, the K130 cyclotron at the Accelerator Laboratory of the University of Jyvaskyla.

doi: 10.1140/epja/s10050-021-00631-4
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2021HE13      Eur.Phys.J. A 57, 132 (2021)

J.Heery, L.Barber, J.Vilhena, B.S.Nara Singh, R.-D.Herzberg, D.M.Cullen, C.Muller-Gatermann, G.Beeton, M.Bowry, A.Dewald, T.Grahn, P.T.Greenlees, A.Illana, R.Julin, S.Juutinen, J.M.Keatings, M.Leino, M.Luoma, D.O'Donnell, J.Ojala, J.Pakarinen, P.Rahkila, P.Ruotsalainen, M.Sandzelius, J.Saren, J.Sinclair, J.F.Smith, J.Sorri, P.Spagnoletti, H.Tann, J.Uusitalo, G.Zimba

Lifetime measurements of yrast states in 178Pt using the charge plunger method with a recoil separator

NUCLEAR REACTIONS 152Sm(32S, X)178Pt, E=192 MeV; measured reaction products, Eγ, Iγ; deduced γ-ray energies, level lifetimes, quadrupole moments, B(E2). The differential decay curve method (DDCM) framework, JUROGAM3 spectrometer.

doi: 10.1140/epja/s10050-021-00425-8
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2021HE15      Phys.Rev.Lett. 126, 182501 (2021)

F.P.Hessberger, M.Block, C.E.Dullmann, A.Yakushev, M.Leino, J.Uusitalo

Some Remarks on the Discovery of 244

RADIOACTIVITY 244Md(α) [from 209Bi(40Ar, 5n)244Md, E not given]; analyzed available data, Eα, Iα. 245,246Md, 245Fm; deduced that results should be attributed to 245Md with small contributions (one event each) from 245Fm and probably 246Md.

doi: 10.1103/PhysRevLett.126.182501
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2021ZH63      Phys.Rev. C 104, 064305 (2021)

W.Zhang, B.Cederwall, C.Qi, A.Ertoprak, O.Aktas, X.Liu, K.Andgren, K.Auranen, T.Back, L.Barber, G.Beeton, D.M.Cullen, I.G.Darby, M.R.Dimmock, S.Eeckhaudt, E.Ganioglu, M.Gorska, T.Grahn, P.T.Greenlees, B.Hadinia, E.Ideguchi, A.Illana, P.M.Jones, D.T.Joss, R.Julin, S.Juutinen, J.M.Keatings, A.Khaplanov, F.Kulali, M.Leino, M.Luoma, B.Lv, B.S.Nara Singh, L.Nelson, M.Niikura, M.Nyman, J.Ojala, R.D.Page, J.Pakarinen, E.S.Paul, C.Petrache, M.Petri, P.Rahkila, P.Ruotsalainen, M.Sandzelius, J.Saren, C.Scholey, J.F.Smith, J.Sorri, H.Tann, G.Zimba, J.Uusitalo, R.Wadsworth, R.Wyss

Identification of excited states in 10752Te55

NUCLEAR REACTIONS 58Ni(54Fe, 3n2p)107Te, E=195 MeV; 54Fe(58Ni, 3n2p)107Te, E=215 MeV; measured recoils, Eγ, Iγ, γγ-coin, (particle)γ-coin using EUROGAM array of 43 Compton-suppressed HPGe detectors and recoiling fusion evaporation products separated by RITU separator and implanted into two double-sided silicon strip detectors (DSSDs) of the GREAT spectrometer in 58Ni(54Fe, 3n2p) experiment, and using Jurogam III array of 15 Eurogam and 24 Euroball clover escape-suppressed Ge detectors, with evaporation products separated by MARA separator and implanted into the DSSD for the 54Fe(58Ni, 3n2p) experiment, both performed at the University of Jyvaskyla Accelerator Laboratory using recoil-decay tagging technique. 107Te; deduced high-spin levels, J, π, νh11/2 band. Comparison with large-scale shell-model calculations and total Routhian surface calculations. Systematics of νh11/2 bands and level structures in 107,109,111,113,115,117,119Te.

doi: 10.1103/PhysRevC.104.064305
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2020AU01      Phys.Rev. C 101, 024306 (2020)

K.Auranen, U.Jakobsson, H.Badran, T.Grahn, P.T.Greenlees, A.Herzan, R.Julin, S.Juutinen, J.Konki, M.Leino, A.-P.Leppanen, G.O'Neill, J.Pakarinen, P.Papadakis, J.Partanen, P.Rahkila, P.Ruotsalainen, M.Sandzelius, J.Saren, C.Scholey, L.Sinclair, J.Sorri, S.Stolze, J.Uusitalo, A.Voss

Isomeric 13/2+ state in 201Fr

RADIOACTIVITY 201Fr(IT)[from 169Tm(36Ar, 4n)201Fr, E=178-187 MeV, followed by separation of residues using RITU separator at the University of Jyvaskyla accelerator laboratory]; measured evaporation residues, E(ce), I(ce), Eγ, Iγ and half-life of the 13/2+ isomer in 201Fr using the GREAT spectrometer and three clover-type Ge detectors. 201Fr; deduced energy, J, π of the 13/2+ isomer, K/(L+M) ratio and multipolarity of the isomeric transition, B(M2). Discussed systematics of energies, B(M2) and deformation of the 13/2+ isomers in N(even)=104-124 Bi, At and Fr isotopes. 201mFr(α)[from 169Tm(36Ar, 4n)201Fr, E=178-187 MeV]; measured Eα and half-life of the 1/2+ isomer of 201Fr; deduced reduced α-decay width using Rasmussen formalism. Comparison with previous experimental results.

doi: 10.1103/PhysRevC.101.024306
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2020AU04      Phys.Rev. C 102, 034305 (2020)

K.Auranen, J.Uusitalo, H.Badran, T.Grahn, P.T.Greenlees, A.Herzan, U.Jakobsson, R.Julin, S.Juutinen, J.Konki, M.Leino, A.-P.Leppanen, G.O'Neill, J.Pakarinen, P.Papadakis, J.Partanen, P.Peura, P.Rahkila, P.Ruotsalainen, M.Sandzelius, J.Saren, C.Scholey, L.Sinclair, J.Sorri, S.Stolze, A.Voss

Exploring the boundaries of the nuclear landscape: α-decay properties of 211Pa

RADIOACTIVITY 211,212,213Pa(α)[from 181Ta(36Ar, 6n), (36Ar, 5n), (36Ar, 4n), E=178-214 MeV, and 169Tm(36Ar, X), E=187 MeV, followed by separation of reaction products of interest using RITU separator at the K-130 cyclotron of the University of Jyvaskyla]; measured Eα, Iα, (implants)-α correlations, and (implants)-α1234 correlations, half-lives of decays of 211Pa, 212Pa and 213Pa using GREAT spectrometer and multiwire proportional counter (MWPC); deduced Q(α), reduced α widths in Rasmussen formalism, α hindrance factors, mass excesses, S(p), S(2p). 199,200,201At, 203,204,205Fr, 207,208,209Ac(α)[from 211,212,213Pa α decay chains]; measured Eα, (211,212,213Pa implants)(4α)-correlations, time differences between correlated events. Comparison with previous experimental results, evaluated masses and proton separation energies in AME2016, and theoretical mass models. Systematics of Q(α) values for N=116-132 Ac, Th and Pa isotopes, S(p) values of A=210-224 Pa isotopes, S(p) values N=116-126 Ac and Th isotopes, and S(2p) values of N=111-126 Th isotopes. 196,197,197m,198Po, 197,198,198m,200At, 200,201,204,205,206Rn, 201,206,207,208,209Fr, 207,208,209,210Ra, 210,211,212,213Ac; observed α peaks in Figs. 1a and 1b from the decays of these isotopes.

doi: 10.1103/PhysRevC.102.034305
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2020BR08      Phys.Rev. C 102, 014307 (2020)

R.Briselet, Ch.Theisen, B.Sulignano, M.Airiau, K.Auranen, D.M.Cox, F.Dechery, A.Drouart, Z.Favier, B.Gall, T.Goigoux, T.Grahn, P.T.Greenlees, K.Hauschild, A.Herzan, R.-D.Herzberg, U.Jakobsson, R.Julin, S.Juutinen, J.Konki, M.Leino, A.Lopez-Martens, A.Mistry, P.Nieminen, J.Pakarinen, P.Papadakis, P.Peura, E.Rey-Herme, P.Rahkila, J.Rubert, P.Ruotsalainen, M.Sandzelius, J.Saren, C.Scholey, J.Sorri, S.Stolze, J.Uusitalo, M.Vandebrouck, A.Ward, M.Zielinska, B.Bally, M.Bender, W.Ryssens

In-beam γ-ray and electron spectroscopy of 249, 251Md

NUCLEAR REACTIONS 203,205Tl(48Ca, 2n), E=218 MeV; measured Eγ, Iγ, E(ce), I(ce), γγ-coin, and γ(ce)-coin using the RITU gas-filled recoil separator, GREAT spectrometer, and SAGE array at the University of Jyvaskyla Accelerator Laboratory. Recoil-decay tagging method. 249,251Md; deduced high-spin levels, J, π, K- and L-conversion coefficients, multipolarities, rotational bands, Nilsson configurations, octupole correlations. Comparison with Skyrme-Hartree-Fock-Bogoliubov theoretical calculations. 251Md, 255Lr; discussed identical transitions and bands.

doi: 10.1103/PhysRevC.102.014307
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2020CA01      Phys.Rev. C 101, 014313 (2020)

L.Capponi, J.F.Smith, P.Ruotsalainen, C.Scholey, P.Rahkila, L.Bianco, A.J.Boston, H.C.Boston, D.M.Cullen, X.Derkx, M.C.Drummond, T.Grahn, P.T.Greenlees, L.Grocutt, B.Hadinia, U.Jakobsson, D.T.Joss, R.Julin, S.Juutinen, M.Labiche, M.Leino, K.G.Leach, C.McPeake, K.F.Mulholland, P.Nieminen, D.O'Donnell, E.S.Paul, P.Peura, M.Sandzelius, J.Saren, B.Saygi, J.Sorri, S.Stolze, A.Thornthwaite, M.J.Taylor, J.Uusitalo

Delayed or absent π(h11/2)2 alignment in 111Xe

NUCLEAR REACTIONS 58Ni(58Ni, nα)111Xe, E=210 MeV; measured Eα, Eγ, Iγ, (evaporation residue)γ-coin, recoil-tagged γγ-coin, αα-correlations using the RITU separator, GREAT spectrometer, planar and Clover HPGe detectors at the K130 cyclotron of the University of Jyvaskyla. 111Xe; deduced levels, J, π, h11/2 band and its alignment, deformation parameters from total Routhian surface (TRS) calculations, configuration. Comparison with shell-model calculations. Systematics of h11/2 bands in 111,113,115,117,119,121Xe.

RADIOACTIVITY 111Xe(α)[from 58Ni(58Ni, nα), E=210 MeV]; 107Te(α)[from 111Xe α decay]; measured Eα, Iα, αα correlations using recoil-decay tagging method.

doi: 10.1103/PhysRevC.101.014313
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2020ER01      Eur.Phys.J. A 56, 65 (2020)

A.Ertoprak, B.Cederwall, C.Qi, O.Aktas, M.Doncel, B.Hadinia, R.Liotta, M.Sandzelius, C.Scholey, K.Andgren, T.Back, H.Badran, T.Braunroth, T.Calverley, D.M.Cox, D.M.Cullen, Y.D.Fang, E.Ganioglu, M.Giles, M.B.Gomez Hornillos, T.Grahn, P.T.Greenlees, J.Hilton, D.Hodge, E.Ideguchi, U.Jakobsson, A.Johnson, P.M.Jones, R.Julin, S.Juutinen, S.Ketelhut, A.Khaplanov, M.Kumar Raju, M.Leino, H.Li, H.Liu, S.Matta, V.Modamio, B.S.Nara Singh, M.Niikura, M.Nyman, I.Ozgur, R.D.Page, J.Pakarinen, P.Papadakis, J.Partanen, E.S.Paul, C.M.Petrache, P.Peura, P.Rahkila, P.Ruotsalainen, J.Saren, J.Sorri, S.Stolze, P.Subramaniam, M.J.Taylor, J.Uusitalo, J.J.Valiente-Dobon, R.Wyss

Evidence for octupole collectivity in 172Pt

NUCLEAR REACTIONS 96Ru(78Kr, 2pγ)172Pt, E=342, 348 MeV; 92Mo(83Kr, 3nγ)172Pt, E=383 MeV; Measured Eγ, Iγ, γγ-coin, γ(θ), γγ(linear polarization), recoils using RITU gas-filled separator, JUROGAM I and JUROGAM II arrays of HPGe detectors, and the GREAT spectrometer consisting of silicon strip detectors, multiwire proportional counter (MWPC), array of Si PIN-diode detectors, one planar and one clover HPGe detector at the K-130 cyclotron facility of the University of Jyvaskyla. 172Pt; deduced high-spin levels, Jπ, multipolarities, bands, configurations, evidence for octupole collectivity. Comparison with large-scale shell model (LSSM) and total Routhian surface (TRS) calculations.

doi: 10.1140/epja/s10050-020-00071-6
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2020HE17      Eur.Phys.J. A 56, 165 (2020)

A.Herzan, S.Juutinen, K.Auranen, T.Grahn, P.T.Greenlees, K.Hauschild, U.Jakobsson, R.Julin, S.Ketelhut, M.Leino, A.Lopez-Martens, T.Lonnroth, P.Nieminen, M.Nyman, J.Partanen, P.Peura, P.Rahkila, P.Ruotsalainen, M.Sandzelius, J.Saren, C.Scholey, J.M.K.Slotte, J.Sorri, S.Stolze, J.Uusitalo

Study of excited states and observation of collective level structures in the odd-odd nucleus 194Bi

NUCLEAR REACTIONS 159Tb(40Ar, 5n)194Bi, E=182, 185, 190 MeV; measured Eγ, Iγ, γγ-coin from α-decay of the 194Bi α-radioactive reaction products decay using the recoil gating technique; deduced rotational bands levels energy, Iγ, Jπ for initial and final states, multipolarity, angular distribution ratios, linear polarization asymmetry factors, 194Bi level scheme, excitation energy minus rigid-rotor reference term vs spin, aligned angular for the favoured and unfavoured signatures of positive and negative parity in several bds.

doi: 10.1140/epja/s10050-020-00167-z
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2020KA02      Phys.Rev. C 101, 011301 (2020)

J.Kallunkathariyil, B.Sulignano, P.T.Greenlees, J.Khuyagbaatar, Ch.Theisen, K.Auranen, H.Badran, F.Bisso, P.Brionnet, R.Briselet, A.Drouart, Z.Favier, T.Goigoux, T.Grahn, K.Hauschild, A.Herzan, F.P.Hessberger, U.Jakobsson, R.Julin, S.Juutinen, J.Konki, M.Leino, A.Lightfoot, J.Pakarinen, P.Papadakis, J.Partanen, P.Peura, P.Rahkila, K.Rezynkina, P.Ruotsalainen, M.Sandzelius, J.Saren, C.Scholey, M.Siciliano, J.Sorri, S.Stolze, A.I.Svirikhin, J.Uusitalo, M.Vandebrouck, A.Ward, C.Wraith, M.Zielinska

Stability of the heaviest elements: K isomer in 250No

NUCLEAR REACTIONS 204Pb(48Ca, 2n)250No, E=218.0 MeV; measured evaporation residues (ER), fission (SF) events, ER-electron-SF correlated events, γ(electron)-coin, half-lives of an isomer and the ground state using RITU separator and GREAT spectrometer at the University of Jyvaskyla accelerator facility. 250No; deduced level, isomer, decay modes of the isomer and the ground state. Systematics of energies of isomers in N=148 isomers 242Pu, 244Cm, 246Cf, 248Fm, 250No. Relevance to the island of stability of superheavy elements.

doi: 10.1103/PhysRevC.101.011301
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2020OD01      J.Phys.(London) G47, 095103 (2020)

D.O'Donnell, R.D.Page, T.Grahn, F.A.Ali, K.Auranen, L .Capponi, R.J.Carroll, M.M.R.Chishti, M.C.Drummond, P.T.Greenlees, J.Henderson, A.Herzan, U.Jakobsson, D.T.Joss, R.Julin, S.Juutinen, J.Konki, M.Labiche, M.Leino, P.J.R.Mason, C.G.McPeake, J.Pakarinen, P.Papadakis, J.Partanen, P.Peura, P.Rahkila, J.Revill, P.Ruotsalainen, M.Sandzelius, J.Saren, B.Saygi, C.Scholey, J.Simpson, J.F.Smith, M.Smolen, J.Sorri, S.Stolze, C.M.Sullivan, A.Thornthwaite, J.Uusitalo, A.Kumar, P.C.Srivastava

High-spin states of 218Th

NUCLEAR REACTIONS 174Yb(48Ca, 4n), E=207 MeV; measured reaction products, Eγ, Iγ; deduced γ-ray energies and intensities, angular anisotropy ratios, J, π, level scheme, high-spin states. Comparison with theoretical calculations.

doi: 10.1088/1361-6471/aba16c
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2020VE03      Phys.Lett. B 806, 135488 (2020)

M.Venhart, M.Balogh, A.Herzan, J.L.Wood, F.A.Ali, D.T.Joss, A.N.Andreyev, K.Auranen, R.J.Carroll, M.C.Drummond, J.L.Easton, P.T.Greenlees, T.Grahn, A.Gredley, J.Henderson, U.Jakobsson, R.Julin, S.Juutinen, J.Konki, E.A.Lawrie, M.Leino, V.Matousek, C.G.McPeake, D.O'Donnell, R.D.Page, J.Pakarinen, P.Papadakis, J.Partanen, P.Peura, P.Rahkila, P.Ruotsalainen, M.Sandzelius, J.Saren, B.Saygi, M.Sedlak, C.Scholey, J.Sorri, S.Stolze, A.Thornthwaite, R.Urban, J.Uusitalo, M.Veselsky, F.P.Wearing

Population of a low-spin positive-parity band from high-spin intruder states in 177Au: The two-state mixing effect

NUCLEAR REACTIONS 92Mo(88Sr, X)177Au, E=399 MeV; 100Ru(82Kr, X)179Au, E=352 MeV; measured reaction products, Eγ, Iγ; deduced γ-ray energies, proton-intruder configuration, partial level scheme, J, π.

doi: 10.1016/j.physletb.2020.135488
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2019BR06      Phys.Rev. C 99, 024614 (2019)

R.Briselet, Ch.Theisen, M.Vandebrouck, A.Marchix, M.Airiau, K.Auranen, H.Badran, D.Boilley, T.Calverley, D.Cox, F.Dechery, F.Defranchi Bisso, A.Drouart, B.Gall, T.Goigoux, T.Grahn, P.T.Greenlees, K.Hauschild, A.Herzan, R.D.Herzberg, U.Jakobsson, R.Julin, S.Juutinen, J.Konki, M.Leino, A.Lightfoot, A.Lopez-Martens, A.Mistry, P.Nieminen, J.Pakarinen, P.Papadakis, J.Partanen, P.Peura, P.Rahkila, J.Rubert, P.Ruotsalainen, M.Sandzelius, J.Saren, C.Scholey, J.Sorri, S.Stolze, B.Sulignano, J.Uusitalo, A.Ward, M.Zielinska

Production cross section and decay study of 243Es and 249Md

NUCLEAR REACTIONS 197Au(48Ca, 2n)243Es, E=208, 210 MeV; 203Tl(48Ca, 2n)249Md, E=212.7, 214.3 MeV; measured reaction products, Eα, Iα, (recoil)α-coin, (recoil)αα-correlations, production σ(E) using RITU separator for recoils at the University of Jyvaskyla. Comparison of measured production σ(E) with calculations using the KEWPIE2 statistical fusion-evaporation code. Systematics of fusion-evaporation σ in the 2n channel.

RADIOACTIVITY 243Es(α)[from 197Au(48Ca, 2n), E=208, 210 MeV followed by separation of fragments using RITU separator at the Accelerator Laboratory of the University of Jyvaskyla (JYFL); 249Md(α)[from 203Tl(48Ca, 2n), E=212.7, 214.3 MeV]; 245Es(α)[α daughter of 249Md decay]; measured Eα, Iα, recoils, (recoils)α-correlations, half-lives and α-decay branching ratios for α decays of ground states of 243,245Es, 249Md. Comparison with previously measured values, and with theoretical predictions.

doi: 10.1103/PhysRevC.99.024614
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2019FO01      J.Phys.(London) G46, 018001 (2019)

U.Forsberg, M.Leino

Comment on 'Analysis of decay chains of superheavy nuclei produced in the 249Bk + 48Ca and 243Am + 48Ca reactions'

NUCLEAR REACTIONS 249Bk, 243Am(48Ca, X)293Ts, E not given; analyzed available data, reinstated the validity of the methods and conclusions presented by Forsberg et al (2016 Nucl. Phys. A 953 117).

doi: 10.1088/1361-6471/aaeba0
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2019GI11      Phys.Rev. C 99, 064310 (2019)

S.A.Gillespie, A.N.Andreyev, M.Al Monthery, C.J.Barton, S.Antalic, K.Auranen, H.Badran, D.Cox, J.G.Cubiss, D.O'Donnell, T.Grahn, P.T.Greenlees, A.Herzan, E.Higgins, R.Julin, S.Juutinen, J.Klimo, J.Konki, M.Leino, M.Mallaburn, J.Pakarinen, P.Papadakis, J.Partanen, P.M.Prajapati, P.Rahkila, M.Sandzelius, C.Scholey, J.Sorri, S.Stolze, R.Urban, J.Uusitalo, M.Venhart, F.Weaving

Identification of a 66 μs isomeric state in 175Ir

RADIOACTIVITY 175Ir(IT)[from 92Mo(88Sr, αp), E=381 MeV, followed by separation of fragments using RITU separator at the University of Jyvaskyla K130 cyclotron facility]; measured Eγ, Iγ, γγ-coin, and isomer half-life by isomer tagging technique using the JUROGAM-II array. 175Ir; deduced levels, J, π, isomer, total conversion coefficients, multipolarities, B(E1), B(M1). Comparison with the decay of a 326-ns, 3/2- isomer in 179Au.

doi: 10.1103/PhysRevC.99.064310
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2019HI06      Phys.Rev. C 100, 014305 (2019)

J.Hilton, J.Uusitalo, J.Saren, R.D.Page, D.T.Joss, M.A.M.AlAqeel, H.Badran, A.D.Briscoe, T.Calverley, D.M.Cox, T.Grahn, A.Gredley, P.T.Greenlees, R.Harding, A.Herzan, E.Higgins, R.Julin, S.Juutinen, J.Konki, M.Labiche, M.Leino, M.C.Lewis, J.Ojala, J.Pakarinen, P.Papadakis, J.Partanen, P.Rahkila, P.Ruotsalainen, M.Sandzelius, C.Scholey, J.Sorri, L.Sottili, S.Stolze, F.Wearing

α-spectroscopy studies of the new nuclides 165Pt and 170Hg

RADIOACTIVITY 165Pt(α)[new nuclide from 92Mo(78Kr, 5n), E=418 MeV]; 170Hg(α)[new nuclide from 96Ru(78Kr, 4n), E=390, 418 MeV]; 167Pt(α)[from 96Ru(78Kr, 3nα), E=390, 418 MeV]; 166Pt(α)[from 96Ru(78Kr, 4n), E=390, 418 MeV]; 161,162,163Os, 158,159W, 157Ta, 154,155Hf(α)[from α-decay chains of 165Pt, 167Pt and 170Hg]; measured Eα, Iα, α-α correlated plots, half-lives of ground states, production cross sections of parent nuclei using the MARA spectrometer with multiwire proportional counter for recoil identification, and double-sided silicon strip detector for α detection at the University of Jyvaskyla accelerator facility; deduced Q(α), reduced α-decay widths. 165Pt, 170Hg(2p); no evidence found for this decay mode in this experiment, although, Q(2p) is positive for both the nuclides. Systematics of Qα and Q(2p) values for A=156-180, and α-decay reduced widths for N=83-102, for W, Os, Pt and Hg isotopes.

doi: 10.1103/PhysRevC.100.014305
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2019MU08      Phys.Rev. C 99, 054325 (2019)

C.Muller-Gatermann, A.Dewald, C.Fransen, K.Auranen, H.Badran, M.Beckers, A.Blazhev, T.Braunroth, D.M.Cullen, G.Fruet, A.Goldkuhle, T.Grahn, P.T.Greenlees, A.Herzan, U.Jakobsson, D.Jenkins, J.Jolie, R.Julin, S.Juutinen, J.Konki, M.Leino, J.Litzinger, K.Nomura, J.Pakarinen, P.Peura, M.G.Procter, P.Rahkila, P.Ruotsalainen, M.Sandzelius, J.Saren, C.Scholey, J.Sorri, S.Stolze, M.J.Taylor, J.Uusitalo, K.O.Zell

Shape coexistence in 178Hg

NUCLEAR REACTIONS 103Rh(78Kr, 2np), E=354 MeV; measured Eγ, Iγ, Eα, (recoil)γ- and αγ-coin, half-lives of levels in the yrast band by recoil-distance Doppler-shift method (RDDS) using RITU separator, JUROGAM II array, GREAT spectrometer and DPUNS plunger at the K-130 cyclotron facility of the University of Jyvaskyla. Recoil-decay tagging method. 178Hg; deduced high-spin levels, J, π, B(E2), transition quadrupole moments, quadrupole deformation parameter β2 and configuration-mixing features. Comparison with predictions of interacting boson model, mean-field model, and total routhian surface (TRS) calculations. Systematics of energy levels in A=172-204, even-A Hg isotopes. Systematics of transition quadrupole moments and kinetic moments of inertia for yrast states in 178,180,182,184Hg.

RADIOACTIVITY 174,175,176Pt, 177,178,179Au, 177,178,179Hg(α)[from 103Rh(78Kr, X), E=354 MeV]; measured Eα correlated with ions.

doi: 10.1103/PhysRevC.99.054325
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2019PA27      Phys.Rev. C 99, 054307 (2019)

E.Parr, R.D.Page, D.T.Joss, F.A.Ali, K.Auranen, L.Capponi, T.Grahn, P.T.Greenlees, J.Henderson, A.Herzan, U.Jakobsson, R.Julin, S.Juutinen, J.Konki, M.Labiche, M.Leino, P.J.R.Mason, C.McPeake, D.O'Donnell, J.Pakarinen, P.Papadakis, J.Partanen, P.Peura, P.Rahkila, J.P.Revill, P.Ruotsalainen, M.Sandzelius, J.Saren, C.Scholey, J.Simpson, J.F.Smith, M.Smolen, J.Sorri, S.Stolze, A.Thornthwaite, J.Uusitalo

Fine structure in the α decay of 156Lu and 158Ta

RADIOACTIVITY 156mLu, 158mTa(α)[from 106Cd(58Ni, X), E=318 MeV using RITU separator and GREAT spectrometer at the accelerator laboratory of the University of Jyvaskyla]; measured Eα, Iα, Eγ, Iγ, αγ-coin using HPGe and planar Ge strip detectors for γ detection, and double-sided silicon strip detectors and silicon PIN diode detectors for α detection; deduced fine structure in the α decay of high-spin isomers in 156Lu and 158Ta. 152Tm, 154Lu; deduced levels, J, π, α-branching ratios, α-reduced decay widths, and α-hindrance factors, configurations. 152mHo, 154mTm, 156mLu, 158mTa(α); systematics of α-decay hindrance factors, and excitation energies, Jπ values and configurations in daughter nuclides of 148Tb, 150Ho, 152Tm, 154Lu. 152Er, 153Tm, 154,155Yb, 155Lu, 157,158Hf, 157Ta, 159,160W(α); measured (ER)α correlated spectra.

doi: 10.1103/PhysRevC.99.054307
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2019PA45      Phys.Rev. C 100, 044323 (2019)

E.Parr, J.F.Smith, P.T.Greenlees, K.Auranen, P.A.Butler, R.Chapman, D.M.Cox, D.M.Cullen, L.P.Gaffney, T.Grahn, E.T.Gregor, L.Grocutt, A.Herzan, R.-D.Herzberg, D.Hodge, U.Jakobsson, R.Julin, S.Juutinen, J.Keatings, J.Konki, M.Leino, P.P.McKee, C.McPeake, D.Mengoni, A.K.Mistry, K.F.Mulholland, B.S.Nara Singh, G.G.O'Neill, J.Pakarinen, P.Papadakis, J.Partanen, P.Peura, P.Rahkila, P.Ruotsalainen, M.Sandzelius, J.Saren, M.Scheck, C.Scholey, M.Siciliano, M.Smolen, J.Sorri, P.Spagnoletti, K.M.Spohr, S.Stolze, M.J.Taylor, J.Uusitalo

α-decay spectroscopy of the N=130 isotones 218Ra and 220Th: Mitigation of α-particle energy summing with implanted nuclei

RADIOACTIVITY 218Ra(α)[from α-decay of 222Th formed in 208Pb(18O, 4n), E=95 MeV]; 214Rn(α)[from α-decay of 218Ra]; 220Th(α)[from α-decay of 224U formed in 208Pb(20Ne, 4n), E=109 MeV]; 216Ra(α)[from α-decay of 220Th]; measured recoiling evaporation residues using RITU gas-filled recoil separator, Eα, Iα, Eγ, Iγ, αγ-coin, half-lives of decays of 218Ra, 214Rn, 220Th and 216Ra, α-branching ratio for decay to the g.s. and the first 2+ level in 214Rn using the GREAT spectrometer at Jyvaskyla accelerator facility; data analyzed using a newly developed technique to mitigate energy summing due to sequential short-lived α decays from nuclei implanted into a silicon detector. 214Rn; deduced 2+ level, α-hindrance factor. Comparison with previous experimental data.

doi: 10.1103/PhysRevC.100.044323
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2019SM01      Eur.Phys.J. A 55, 1 (2019)

J.Smallcombe, P.J.Davies, C.J.Barton, L.L.Andersson, P.A.Butler, D.M.Cox, T.Grahn, P.T.Greenlees, K.Hauschild, A.Herzan, R.-D.Herzberg, U.Jakobsson, D.G.Jenkins, P.Jones, R.Julin, S.Juutinen, S.Ketelhut, M.Leino, A.Lopez-Martens, A.Mistry, P.Nieminen, J.Pakarinen, P.Papadakis, E.Parr, P.Peura, P.Rahkila, S.Rinta-Antila, P.Ruotsalainen, M.Sandzelius, J.Saren, C.Scholey, J.Sorri, J.Uusitalo

Confirming band assignments in 167ytterbium with gamma-gamma-electron triple-coincidence spectroscopy

NUCLEAR REACTIONS 154Sm(16O, 3n), (16O, 4n), (16O, 16O'); measured Eγ, Iγ, γγe-coin, γγγ-coin using SAGE array using 24 Clover and 10 EUROGAM Phase I detectors of JUROGAM II; deduced 166,167Yb* excited states, conversion coefficients, levels, J, π.

doi: 10.1140/epja/i2019-12675-8
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2018AU01      Phys.Rev. C 97, 024301 (2018)

K.Auranen, J.Uusitalo, S.Juutinen, H.Badran, F.Defranchi Bisso, D.Cox, T.Grahn, P.T.Greenlees, A.Herzan, U.Jakobsson, R.Julin, J.Konki, M.Leino, A.Lightfoot, M.J.Mallaburn, O.Neuvonen, J.Pakarinen, P.Papadakis, J.Partanen, P.Rahkila, M.Sandzelius, J.Saren, C.Scholey, J.Sorri, S.Stolze, Y.K.Wang

Prompt and delayed spectroscopy of 203At: Observation of a shears band a 29/2+ isomeric state

NUCLEAR REACTIONS 159Tb(48Ca, 4n), E=198 MeV; measured Eγ, Iγ, γ(θ), E(x ray), I(x ray), Eα, γγ- and (ce)γ-coin, recoil-gated γ singles, recoil-isomer decay tagged γ singles, prompt and delayed γ-ray spectra, half-lives of isomers, K/(L+M+) ratios using RITU separator, GREAT spectrometer, JUROGAM II array of 24 clover and 15 tapered Compton-suppressed Ge detectors at the K-130 cyclotron Accelerator Laboratory at the University of Jyvaskyla. 203At; deduced high-spin levels, J, π, multipolarities, B(E1), B(E2), B(M2), magnetic-dipole shears band, configurations. Comparison with TAC-CDFT calculations for the shears band. Energy systematics of N=110-126 odd-A At isotopes.

doi: 10.1103/PhysRevC.97.024301
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2018KO05      Phys.Rev. C 97, 024306 (2018)

J.Konki, B.Sulignano, P.T.Greenlees, Ch.Theisen, K.Auranen, H.Badran, R.Briselet, D.M.Cox, F.Defranchi Bisso, J.Dobaczewski, T.Grahn, A.Herzan, R.-D.Herzberg, R.Julin, S.Juutinen, J.Khuyagbaatar, M.Leino, A.Lightfoot, J.Pakarinen, P.Papadakis, J.Partanen, P.Rahkila, M.Sandzelius, J.Saren, C.Scholey, Y.Shi, M.Smolen, J.Sorri, S.Stolze, J.Uusitalo

In-beam spectroscopic study of 244Cf

NUCLEAR REACTIONS 198Pt(48Ca, 2n), (48Ca, 3n), E=207, 208, 211, 213 MeV; measured evaporation residues and σ for 2n and 3n channels by TOF and ΔE, excitation functions, Eγ, Iγ, γγ-coin, Eα, Iα, recoil-α, and recoil-α-γ correlated events, using RITU separator, GREAT spectrometer, JUROGAM-II array of 24 clover-type and 15 either Phase-I- or GASP-type Compton-suppressed Ge detectors at the K=130 MeV cyclotron facility of University of Jyvaskyla. Recoil-decay tagging method. 244Cf; deduced high-spin levels, J, π, yrast rotational band up to (20+), moment of inertia plots, Harris expansion used to deduce energies of the first 2+ and 4+ states. Comparison with available calculations. Systematics of yrast levels and moment of inertia in 238U, 240Pu, 242Cm, 244Cf and 246Fm.

RADIOACTIVITY 243,244Cf(α)[from 198Pt(48Ca, 2n), (48Ca, 3n), E=207, 208, 211, 213 MeV]; measured Eα, Iα, (recoil)α-coin, half-lives of ground states of 243Cf and 244Cf; deduced branching ratio for α-decay mode of 244Cf. Comparison with earlier experimental values.

doi: 10.1103/PhysRevC.97.024306
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2018LE10      Phys.Rev. C 98, 024302 (2018)

M.C.Lewis, E.Parr, R.D.Page, C.McPeake, D.T.Joss, F.A.Ali, K.Auranen, A.D.Briscoe, L.Capponi, T.Grahn, P.T.Greenlees, J.Henderson, A.Herzan, U.Jakobsson, R.Julin, S.Juutinen, J.Konki, M.Labiche, M.Leino, P.J.R.Mason, M.Nyman, D.O'Donnell, J.Pakarinen, P.Papadakis, J.Partanen, P.Peura, P.Rahkila, J.P.Revill, P.Ruotsalainen, M.Sandzelius, J.Saren, B.Saygi, C.Scholey, J.Simpson, J.F.Smith, M.Smolen, J.Sorri, S.Stolze, A.Thornthwaite, J.Uusitalo

Decay of a 19- isomeric state in 156Lu

NUCLEAR REACTIONS 106Cd(58Ni, n3pα), E=318 MeV; measured Eγ, Iγ γγ-coin, delayed γ rays, and (implants)γα correlations, half-life of a 19- isomer by γγ(t) using RITU separator and GREAT spectrometer at Jyvaskyla. 156Lu; deduced levels, J, π, multipolarity, configurations, B(M2), and B(E3). Systematics of 9+, 10+, and 19- states in even-A N=85 isotones 150Tb, 152Ho, 154Tm, 156Lu, 158Ta, 160Re.

doi: 10.1103/PhysRevC.98.024302
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2018LV01      Phys.Rev. C 98, 044304 (2018)

B.F.Lv, C.M.Petrache, A.Astier, E.Dupont, A.Lopez-Martens, P.T.Greenlees, H.Badran, T.Calverley, D.M.Cox, T.Grahn, J.Hilton, R.Julin, S.Juutinen, J.Konki, M.Leino, J.Pakarinen, P.Papadakis, J.Partanen, P.Rahkila, M.Sandzelius, J.Saren, C.Scholey, J.Sorri, S.Stolze, J.Uusitalo, A.Herzan, B.Cederwall, A.Ertoprak, H.Liu, S.Guo, M.L.Liu, Y.H.Qiang, J.G.Wang, X.H.Zhou, I.Kuti, J.Timar, A.Tucholski, J.Srebrny, C.Andreoiu

Evolution from γ-soft to stable triaxiality in 136Nd as a prerequisite of chirality

NUCLEAR REACTIONS 100Mo(40Ar, 4n), E=152 MeV; measured Eγ, Iγ, recoils, γγ-coin, and γγ(θ)(DCO) using JUROGAM II array for prompt γ detection, RITU separator for recoils, and GREAT detector array for recoil and delayed γ detection at the K130 cyclotron of the University of Jyvaskyla. 136Nd; deduced high-spin levels, J, π, multipolarities, bands, dipole bands, configurations, alignments, single-particle and collective excitations, and deformation of bands. Comparison with cranked Nilsson-Strutinski (CNS) calculations.

doi: 10.1103/PhysRevC.98.044304
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2018NA20      Phys.Rev. C 98, 024319 (2018)

B.S.Nara Singh, D.M.Cullen, M.J.Taylor, P.C.Srivastava, P.Van Isacker, O.Beeke, B.Dodson, C.Scholey, D.O'Donnell, U.Jakobsson, T.Grahn, P.T.Greenlees, P.M.Jones, R.Julin, S.Khan, M.Leino, A.-P.Leppanen, S.Eeckhaudt, K.Mantyniemi, J.Pakarinen, P.Peura, P.Rahkila, J.Saren, J.Sorri, J.Uusitalo, M.Venhart

Level structure above the 17+ isomeric state in 15269Tm83

NUCLEAR REACTIONS 92Mo(64Zn, n3p), E=280 MeV; measured Eγ, Iγ, recoil time of flight and total kinetic energy loss (TKEL), γγ-coin, delayed γ, and half-life of the 17+ isomer using JUROGAM array for γ detection, RITU separator for recoil separation, and Gamma-Recoil-Electron-Alpha-Tagging (GREAT) spectrometer at JYFL, Jyvaskyla. 152Tm; deduced levels, J, π, configurations; calculated levels, J, π and B(E2) values of transitions in the yrast sequence 9+ to 21+ using both large scale shell model and reduced shell model with different proton-neutron interactions.

doi: 10.1103/PhysRevC.98.024319
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2018PA37      Phys.Rev. C 98, 024321 (2018)

E.Parr, R.D.Page, D.T.Joss, F.A.Ali, K.Auranen, L.Capponi, T.Grahn, P.T.Greenlees, J.Henderson, A.Herzan, U.Jakobsson, R.Julin, S.Juutinen, J.Konki, M.Labiche, M.Leino, P.J.R.Mason, C.McPeake, D.O'Donnell, J.Pakarinen, P.Papadakis, J.Partanen, P.Peura, P.Rahkila, J.P.Revill, P.Ruotsalainen, M.Sandzelius, J.Saren, C.Scholey, J.Simpson, J.F.Smith, M.Smolen, J.Sorri, S.Stolze, A.Thornthwaite, J.Uusitalo

Fine structure in the α decay of high-spin isomers in 155Lu and 156Hf

RADIOACTIVITY 155,155mLu, 156Hf(α)[from 106Cd(58Ni, X), E=318 MeV, followed by separation of fusion reaction products using RITU gas-filled recoil separator at JYFL-Jyvaskyla]; measured Eα, Iα, Eγ, Iγ, x-rays, αγ-coin using an array of HPGe detectors for γ and x-ray detection, double-sided silicon-strip detectors (DSSDs) for particle detection using GREAT spectrometer at Jyvaskyla. 151Tm, 152Yb; deduced levels, J, π, α branching ratios, reduced decay widths, hindrance factors and Q(α) values, configurations.

doi: 10.1103/PhysRevC.98.024321
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2017AU05      Phys.Rev. C 95, 044311 (2017)

K.Auranen, J.Uusitalo, S.Juutinen, H.Badran, F.Defranchi Bisso, D.Cox, T.Grahn, P.T.Greenlees, A.Herzan, U.Jakobsson, R.Julin, J.Konki, M.Leino, A.Lightfoot, M.Mallaburn, O.Neuvonen, J.Pakarinen, P.Papadakis, J.Partanen, P.Rahkila, M.Sandzelius, J.Saren, C.Scholey, J.Sorri, S.Stolze

Experimental study of isomeric intruder 1/2+ states in 197, 203At

NUCLEAR REACTIONS 159Tb(48Ca, 4n)203At, E=198 MeV; 165Ho(36Ar, 4n), E=173 MeV; measured Eγ, Iγ, γγ-coin, (recoil)(electron)γ(t), γ(θ), E(x ray), I(x ray), Eα, Iα, ce, half-life of 1/2+ isomer in 203At, recoil-decay and recoil-isomer decay tagging methods using RITU separator, GREAT spectrometer and JUROGAM II array at the K-130 cyclotron facility of Jyvaskyla. 197,203At; deduced levels, J, π, 1/2+ states, conversion coefficients, multipolarities, configurations. Systematics of moment of inertia plots, and energies of 1/2+ to 15/2+ states in 195,197,199,201,203At, 198Rn, 196Po, 191,193Bi isotopes.

RADIOACTIVITY 193Bi, 196,197,197m,198,202Po, 196,197,197m,198,202,203,204At(α)[from 159Tb(48Ca, 4n)203At, E=198 MeV and 165Ho(36Ar, 4n), E=173 MeV reactions]; observed α-spectra.

doi: 10.1103/PhysRevC.95.044311
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2017BA46      Phys.Rev. C 96, 064314 (2017)

H.Badran, C.Scholey, J.Uusitalo, K.Auranen, T.Grahn, P.T.Greenlees, A.Herzan, U.Jakobsson, R.Julin, S.Juutinen, J.Konki, M.Leino, M.J.Mallaburn, J.Pakarinen, P.Papadakis, J.Partanen, P.Peura, P.Rahkila, M.Sandzelius, J.Saren, J.Sorri, S.Stolze

Decay spectroscopy of 17982Pb97 and evidence for a 9/2- intruder state in 17981Tl98

RADIOACTIVITY 179,179mTl(α)[from 104Pd(78Kr, 2np), E=358 MeV]; 175,175mAu(α)[from 179Tl α decay]; 179Pb(α)[from 104Pd(78Kr, 3n), E=358 MeV]; 175Hg(α)[from 179Pb α decay]; measured production σ for 179Pb, Eα, Iα, Eγ, Iγ, E(x rays), I(x rays), recoil-αγ-coin, recoil-αα-coin, recoil-α-α-α correlations using RITU separator and GREAT spectrometer at the accelerator laboratory of University of Jyvaskyla; deduced hindrance factors and α-reduced widths. 179,179mTl, 179Pb, 175,175mAu, 175Hg; deduced half-lives for decays. 175Hg; deduced levels, J, π. 179Pb; search for 13/2+ (νi13/2) isomer in the 180-300 keV excitation range proved negative. 179Tl; deduced new (9/2-) isomer, γ-cascade, energy, half-life, γ-multipolarities from recoil-γ-α and recoil-ce-α correlations. Systematics of 9/2-, 3/2+, and 11/2- states relative to 1/2+ ground state in 177,179,181,183,185,187,189,191,193,195,197,199,201Tl. 178,179Au, 174,176Pt, 176,177,178,179,180Hg(α); observed α lines in recoil-α correlated spectrum vetoed by the gas counter (MWPC) and planar Ge detector.

doi: 10.1103/PhysRevC.96.064314
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2017DO06      Phys.Rev. C 95, 044321 (2017)

M.Doncel, B.Cederwall, C.Qi, H.Li, U.Jakobsson, K.Auranen, S.Bonig, M.C.Drummond, T.Grahn, P.T.Greenlees, A.Herzan, D.T.Joss, R.Julin, S.Juutinen, J.Konki, T.Kroll, M.Leino, C.McPeake, D.O'Donnell, R.D.Page, J.Pakarinen, J.Partanen, P.Peura, P.Rahkila, P.Ruotsalainen, M.Sandzelius, J.Saren, B.Saygi, C.Scholey, J.Sorri, S.Stolze, M.J.Taylor, A.Thornthwaite, J.Uusitalo

Lifetime measurements of excited states in 162W and 164W and the evolution of collectivity in rare-earth nuclei

NUCLEAR REACTIONS 92Mo(78Kr, 2α), (78Kr, 2pα), E=380 MeV; measured Eγ, half-lives of the first 2+ states by recoil-distance Doppler-shift (RDDS) method using DPUNS differential plunger device and RITU separator at Jyvaskyla K-130 cyclotron facility. 162,164W; deduced levels, B(E2) for the first 2+ states. Comparison with systematics of B(E2) values for neighboring nuclei, and with theoretical calculations.

doi: 10.1103/PhysRevC.95.044321
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2017HE12      Phys.Rev. C 96, 014301 (2017)

A.Herzan, S.Juutinen, K.Auranen, T.Grahn, P.T.Greenlees, K.Hauschild, U.Jakobsson, R.Julin, S.Ketelhut, M.Leino, A.Lopez-Martens, T.Lonnroth, P.Nieminen, M.Nyman, J.Partanen, P.Peura, P.Rahkila, P.Ruotsalainen, M.Sandzelius, J.Saren, C.Scholey, J.M.K.Slotte, J.Sorri, S.Stolze, J.Uusitalo

Detailed spectroscopy of 195Bi

NUCLEAR REACTIONS 159Tb(40Ar, 4n)195Bi, E=175 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ)(DCO), integrated polarizational-directional correlation from oriented nuclei (IPDCO), conversion coefficients from recoil-gated Ge and PIN diode spectra, half-lives of the isomers by (recoils)γ(t) using recoil-tagging techniques, RITU separator, JUROGAM II array, GREAT focal plane spectrometer at the K=130 cyclotron facility of the University of Jyvaskyla. 195Bi; deduced high-spin levels, J, π, multipolarities, B(E1), B(E2), B(M1)/B(E2), bands, superdeformed band, alignments, configurations, shape coexistence. Systematics of excited states in A=191-207, odd-A Bi isotopes. Systematics of B(E2) values for isomeric states in 193,195Bi, 192,194,196Pb, and 199,201,205At.

doi: 10.1103/PhysRevC.96.014301
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2017JO09      Phys.Lett. B 772, 703 (2017)

D.T.Joss, R.D.Page, A.Herzan, L.Donosa, J.Uusitalo, R.J.Carroll, I.G.Darby, K.Andgren, B.Cederwall, S.Eeckhaudt, T.Grahn, P.T.Greenlees, B.Hadinia, U.Jakobsson, P.M.Jones, R.Julin, S.Juutinen, M.Leino, A.-P.Leppanen, M.Nyman, D.O'Donnell, J.Pakarinen, P.Rahkila, M.Sandzelius, J.Saren, C.Scholey, D.Seweryniak, J.Simpson, J.Sorri

Spectroscopy at the two-proton drip line: Excited states in 158W

NUCLEAR REACTIONS Pd(58Ni, X)158W, E=255 MeV; measured reaction products, Eγ, Iγ; deduced σ.

RADIOACTIVITY 158W(α), (2p); measured decay products, Eα, Iα, Eγ, Iγ; deduced γ-ray energies, J, π, an upper limit for the two-proton decay branch and T1/2. Comparison with available data.

doi: 10.1016/j.physletb.2017.07.031
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2017KO02      Phys.Lett. B 764, 265 (2017)

J.Konki, J.Khuyagbaatar, J.Uusitalo, P.T.Greenlees, K.Auranen, H.Badran, M.Block, R.Briselet, D.M.Cox, M.Dasgupta, A.Di Nitto, Ch.E.Dullmann, T.Grahn, K.Hauschild, A.Herzan, R.-D.Herzberg, F.P.Hessberger, D.J.Hinde, R.Julin, S.Juutinen, E.Jager, B.Kindler, J.Krier, M.Leino, B.Lommel, A.Lopez-Martens, D.H.Luong, M.Mallaburn, K.Nishio, J.Pakarinen, P.Papadakis, J.Partanen, P.Peura, P.Rahkila, K.Rezynkina, P.Ruotsalainen, M.Sandzelius, J.Saren, C.Scholey, J.Sorri, S.Stolze, B.Sulignano, Ch.Theisen, A.Ward, A.Yakushev, V.Yakusheva

Towards saturation of the electron-capture delayed fission probability: The new isotopes 240Es and 236Bk

RADIOACTIVITY 240Es(EC), (α), 236Bk(EC) [from 209Bi(34S, 3n)240Es, E=174, 178 MeV]; measured decay products, Eα, Iα; deduced T1/2, branching ratios, electron-capture delayed fission (ECDF) probability. Comparison with available data.

doi: 10.1016/j.physletb.2016.11.038
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2017MA12      Phys.Rev. C 95, 034304 (2017); Erratum Phys.Rev. C 98, 019902 (2018)

G.Maquart, L.Augey, L.Chaix, I.Companis, C.Ducoin, J.Dudouet, D.Guinet, G.Lehaut, C.Mancuso, N.Redon, O.Stezowski, A.Vancraeyenest, A.Astier, F.Azaiez, S.Courtin, D.Curien, I.Deloncle, O.Dorvaux, G.Duchene, B.Gall, T.Grahn, P.Greenlees, A.Herzan, K.Hauschild, U.Jakobsson, P.Jones, R.Julin, S.Juutinen, S.Ketelhut, M.Leino, A.Lopez-Martens, P.Nieminen, P.Petkov, P.Peura, M.-G.Porquet, P.Rahkila, S.Rinta-Antila, M.Rousseau, P.Ruotsalainen, M.Sandzelius, J.Saren, C.Scholey, J.Sorri, S.Stolze, J.Uusitalo

Backbending in the pear-shaped 22390Th nucleus: Evidence of a high-spin octupole to quadrupole shape transition in the actinides

NUCLEAR REACTIONS 208Pb(18O, 3n), E=85 MeV; measured Eγ, Iγ, γγ-coin, angular distribution ADO ratios using EUROBALL IV array at IReS-Strasbourg Vivitron facility. 223Th; deduced high-spin levels, J, π, multipolarity, alternating-parity reflection-symmetric bands classified in terms of simplex quantum numbers, backbending, alignments, high-spin octupole to quadrupole shape transition. Systematics of splitting between states with opposite parity within the same rotational band in 221,223,225Th.

doi: 10.1103/PhysRevC.95.034304
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2017MI01      Eur.Phys.J. A 53, 24 (2017)

A.K.Mistry, R.-D.Herzberg, P.T.Greenlees, P.Papadakis, K.Auranen, P.A.Butler, D.M.Cox, A.B.Garnsworthy, T.Grahn, K.Hauschild, U.Jakobsson, D.T.Joss, R.Julin, S.Ketelhut, J.Konki, M.Leino, A.Lopez-Martens, R.D.Page, J.Pakarinen, P.Peura, P.Rahkila, M.Sandzelius, C.Scholey, J.Simpson, D.Seddon, J.Sorri, S.Stolze, J.Thornhill, J.Uusitalo, D.Wells

In-beam study of 253No using the SAGE spectrometer

NUCLEAR REACTIONS 207Pb(48Ca, 2n), E not given; measured neutrons, prompt γ rays, X-rays, electrons, evaporation residues. 253No deduced α-decay T1/2, ICC, B(M1)/B(E2), dynamic model of inertia.

doi: 10.1140/epja/i2017-12215-8
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2017VE03      Phys.Rev. C 95, 061302 (2017)

M.Venhart, F.A.Ali, W.Ryssens, J.L.Wood, D.T.Joss, A.N.Andreyev, K.Auranen, B.Bally, M.Balogh, M.Bender, R.J.Carroll, J.L.Easton, P.T.Greenlees, T.Grahn, P.-H.Heenen, A.Herzan, U.Jakobsson, R.Julin, S.Juutinen, D.Klc, J.Konki, E.Lawrie, M.Leino, V.Matousek, C.G.McPeake, D.O'Donnell, R.D.Page, J.Pakarinen, J.Partanen, P.Peura, P.Rahkila, P.Ruotsalainen, M.Sandzelius, J.Saren, B.Saygi, M.Sedlak, C.Scholey, J.Sorri, S.Stolze, A.Thornthwaite, J.Uusitalo, M.Veselsky

De-excitation of the strongly coupled band in 177Au and implications for core intruder configurations in the light Hg isotopes

NUCLEAR REACTIONS 92Mo(88Sr, 2np), E=399 MeV; measured reaction products, Eγ, Iγ, (ion implants)γ-coin, γγ-coin, γγ(θ)(DCO), α-decay tagging method using Jurogam-II array, GREAT spectrometer, and RITU gas-filled separator at the K=130 MeV cyclotron facility of the University of Jyvaskyla. 177Au; deduced high-spin levels, conversion coefficients, multipolarity, J, π, bands, configuration. Comparisons with cranked Hartree-Fock-Bogoliubov (HFB) calculations based on Skyrme energy functionals, and with the structures of 187Au and 178Hg nuclei.

doi: 10.1103/PhysRevC.95.061302
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2017WA18      Phys.Lett. B 770, 83 (2017)

F.Wang, B.H.Sun, Z.Liu, R.D.Page, C.Qi, C.Scholey, S.F.Ashley, L.Bianco, I.J.Cullen, I.G.Darby, S.Eeckhaudt, A.B.Garnsworthy, W.Gelletly, M.B.Gomez Hornillos, T.Grahn, P.T.Greenlees, D.G.Jenkins, G.A.Jones, P.Jones, D.T.Joss, R.Julin, S.Juutinen, S.Ketelhut, S.Khan, A.Kishada, M.Leino, M.Niikura, M.Nyman, J.Pakarinen, S.Pietri, Z.Podolyak, P.Rahkila, S.Rigby, J.Saren, T.Shizuma, J.Sorri, S.Steer, J.Thomson, N.J.Thompson, J.Uusitalo, P.M.Walker, S.Williams, H.F.Zhang, W.Q.Zhang, L.H.Zhu

Spectroscopic factor and proton formation probability for the d3/2 proton emitter 151mLu

RADIOACTIVITY 151Lu(p) [from 96Ru(58Ni, X)151Lu, E=266, 274 MeV]; measured decay products, Ep, Ip, Eγ, Iγ; deduced γ-ray energies and intensities, spectroscopic factors, proton-decay formation amplitudes, Q-value, T1/2. Comparison with theoretical calculations.

doi: 10.1016/j.physletb.2017.04.034
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2017WA49      Phys.Rev. C 96, 064307 (2017); Erratum Phys.Rev. C 97, 029902 (2018)

F.Wang, B.H.Sun, Z.Liu, C.Qi, L.H.Zhu, C.Scholey, S.F.Ashley, L.Bianco, I.J.Cullen, I.G.Darby, S.Eeckhaudt, A.B.Garnsworthy, W.Gelletly, M.B.Gomez Hornillos, T.Grahn, P.T.Greenlees, D.G.Jenkins, G.A.Jones, P.Jones, D.T.Joss, R.Julin, S.Juutinen, S.Ketelhut, S.Khan, A.Kishada, M.Leino, M.Niikura, M.Nyman, R.D.Page, J.Pakarinen, S.Pietri, Zs.Podolyak, P.Rahkila, S.Rigby, J.Saren, T.Shizuma, J.Sorri, S.Steer, J.Thomson, N.J.Thompson, J.Uusitalo, P.M.Walker, S.Williams

Reinvestigation of the excited states in the proton emitter 151Lu: Particle-hole excitations across the N=Z=64 subshell

NUCLEAR REACTIONS 96Ru(58Ni, 2np), E=266, 274 MeV; measured fusion-evaporation residues, Eγ, Iγ, γγ-coin, pγ-coin using RITU separator, GREAT spectrometer and JUROGAM array at the K130 cyclotron facility of the University of Jyvaskyla. Recoil-Decay Tagging (RDT) technique. 151Lu; deduced high-spin levels, J, π, sequences. Comparison with large-scale shell-model calculations.

doi: 10.1103/PhysRevC.96.064307
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2016BA60      Phys.Rev. C 94, 054301 (2016)

H.Badran, C.Scholey, K.Auranen, T.Grahn, P.T.Greenlees, A.Herzan, U.Jakobsson, R.Julin, S.Juutinen, J.Konki, M.Leino, M.Mallaburn, J.Pakarinen, P.Papadakis, J.Partanen, P.Peura, P.Rahkila, M.Sandzelius, J.Saren, J.Sorri, S.Stolze, J.Uusitalo

Confirmation of the new isotope 178Pb

RADIOACTIVITY 178Pb(α)[from 104Pd(78Kr, 4n), E=358 MeV using K-130 cyclotron at Jyvaskyla]; measured Eα, αα-correlations in the α decay chain 178Pb -> 174Hg -> 170Pt -> 166Os -> 162W -> 158Hf, half-life of 178Pb decay; deduced Q(α), reduced width and hindrance factor. Comparison with theoretical calculations using the Coulomb and proximity potential model. Systematics of experimental and theoretical α-decay widths and spectroscopic factors for N=88-112, Z=78, 80, 82 nuclei. 175,176Hg, 177Tl, 179mTl, 179Pb(α); observed α peaks from contaminants.

doi: 10.1103/PhysRevC.94.054301
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2016CA15      Phys.Rev. C 93, 034307 (2016)

R.J.Carroll, R.D.Page, D.T.Joss, D.O'Donnell, J.Uusitalo, I.G.Darby, K.Andgren, K.Auranen, S.Bonig, B.Cederwall, M.Doncel, M.C.Drummond, S.Eeckhaudt, T.Grahn, C.Gray-Jones, P.T.Greenlees, B.Hadinia, A.Herzan, U.Jakobsson, P.M.Jones, R.Julin, S.Juutinen, J.Konki, T.Kroll, M.Leino, A.-P.Leppanen, C.McPeake, M.Nyman, J.Pakarinen, J.Partanen, P.Peura, P.Rahkila, J.Revill, P.Ruotsalainen, M.Sandzelius, J.Saren, B.Saygi, C.Scholey, D.Seweryniak, J.Simpson, J.Sorri, S.Stolze, M.J.Taylor, A.Thornthwaite

Excited states in the proton-unbound nuclide 158Ta

RADIOACTIVITY 166Ir, 162Re, 158Ta(α)[166Ir from 92Mo(78Kr, X), E=380 MeV using RITU separator at Jyvaskyla; 162Re and 158Ta from α decay chain]; measured Eα, Eγ, αγ-coin, α(implanted ion) correlations. 158Ta; deduced levels, J, π. 167Ir, 165,166Os(α); observed α spectrum.

NUCLEAR REACTIONS 102Pd(58Ni, np), E=255 MeV; measured Eγ, Iγ, Eα from g.s. and 19- isomer, γγ-coin, prompt and delayed γ rays, γ(implant) correlations using RITU separator, GREAT spectrometer and JUROGAM array at Jyvaskyla. 158Ta; deduced high-spin levels, J, π, isomer, conversion coefficients, multipolarity, configurations. Systematics of levels in N=85 isotones relative to 7/2- in odd-A and 9+ and 10+ in even-A isotopes of 149Gd, 151Dy, 153Er, 155Yb, 157Hf, 159W, 150Tb, 152Ho, 154Tm, 156Lu, 158Ta, 160Re. Discussed proton emission from excited states.

doi: 10.1103/PhysRevC.93.034307
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2016CA33      Phys.Rev. C 94, 024314 (2016)

L.Capponi, J.F.Smith, P.Ruotsalainen, C.Scholey, P.Rahkila, K.Auranen, L.Bianco, A.J.Boston, H.C.Boston, D.M.Cullen, X.Derkx, M.C.Drummond, T.Grahn, P.T.Greenlees, L.Grocutt, B.Hadinia, U.Jakobsson, D.T.Joss, R.Julin, S.Juutinen, M.Labiche, M.Leino, K.G.Leach, C.McPeake, K.F.Mulholland, P.Nieminen, D.O'Donnell, E.S.Paul, P.Peura, M.Sandzelius, J.Saren, B.Saygi, J.Sorri, S.Stolze, A.Thornthwaite, M.J.Taylor, J.Uusitalo

Direct observation of the 114Ba → 110Xe → 106Te → 102Sn triple α-decay chain using position and time correlations

RADIOACTIVITY 114Ba, 110Xe, 106Te(α)[114Ba from 58Ni(58Ni, 2n), E=210 MeV using RITU recoil separator, 110Xe and 106Te from descendents of 114Ba decay]; measured Eα, Iα, three successive α-decay correlated events, half-lives of decays of 114Ba, 110Xe and 106Te, reaction cross section at K130 cyclotron facility of University of Jyvaskyla; deduced Q(α), Q(12C), α-decay mode branching ratios, reduced α-decay widths.

doi: 10.1103/PhysRevC.94.024314
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2016CA42      Phys.Rev. C 94, 064311 (2016)

R.J.Carroll, B.Hadinia, C.Qi, D.T.Joss, R.D.Page, J.Uusitalo, K.Andgren, B.Cederwall, I.G.Darby, S.Eeckhaudt, T.Grahn, C.Gray-Jones, P.T.Greenlees, P.M.Jones, R.Julin, S.Juutinen, M.Leino, A.-P.Leppanen, M.Nyman, J.Pakarinen, P.Rahkila, M.Sandzelius, J.Saren, C.Scholey, D.Seweryniak, J.Simpson

Multiparticle configurations of excited states in 155Lu

NUCLEAR REACTIONS 102Pd(58Ni, pα)155Lu/156Lu/157Lu/156Hf/157Hf/157Ta/158Ta/159Ta/158W, E=255 MeV; measured reaction products, Eγ, Iγ, delayed γ, (recoils)(α)γγ-coin using RITU separator, JUROGAM array and GREAT spectrometer at Jyvaskyla Accelerator Laboratory. Recoil-decay tagging (RDT) technique. 155Lu; deduced levels, J, π, multipolarity, configurations, anti-aligned 1+ interaction between h11/2 protons and h9/2 neutrons. Comparison with shell-model calculations. Systematics of excited states in odd-A N=84 isotones of 149Tb, 151Ho, 153Tm, 155Lu, 157Ta.

doi: 10.1103/PhysRevC.94.064311
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2016DE29      Phys.Rev. C 94, 054311 (2016)

D.M.Debenham, M.A.Bentley, P.J.Davies, T.Haylett, D.G.Jenkins, P.Joshi, L.F.Sinclair, R.Wadsworth, P.Ruotsalainen, J.Henderson, K.Kaneko, K.Auranen, H.Badran, T.Grahn, P.Greenlees, A.Herzaan, U.Jakobsson, J.Konki, R.Julin, S.Juutinen, M.Leino, J.Sorri, J.Pakarinen, P.Papadakis, P.Peura, J.Partanen, P.Rahkila, M.Sandzelius, J.Saren, C.Scholey, S.Stolze, J.Uusitalo, H.M.David, G.de Angelis, W.Korten, G.Lotay, M.Mallaburn, E.Sahin

Spectroscopy of 70Kr and isospin symmetry in the T=1 fpg shell nuclei

NUCLEAR REACTIONS 40Ca(32S, 2n), E=88 MeV; measured Eγ, (recoil)βγ-correlated events, half-life of 70Kr decay using JUROGAM II array at K130 cyclotron facility in Jyvaskyla. Recoil-β tagging method. 70Kr; deduced levels, J, π, triplet energy differences (TED) and mirror energy differences (MED). Comparison with shell model calculations. Systematics of TED and MED in even A=66, 70, 74 and 78 fpg shell nuclei.

doi: 10.1103/PhysRevC.94.054311
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2016GR15      Phys.Rev. C 94, 044327 (2016)

T.Grahn, S.Stolze, D.T.Joss, R.D.Page, B.Saygi, D.O'Donnell, M.Akmali, K.Andgren, L.Bianco, D.M.Cullen, A.Dewald, P.T.Greenlees, K.Heyde, H.Iwasaki, U.Jakobsson, P.Jones, D.S.Judson, R.Julin, S.Juutinen, S.Ketelhut, M.Leino, N.Lumley, P.J.R.Mason, O.Moller, K.Nomura, M.Nyman, A.Petts, P.Peura, N.Pietralla, Th.Pissulla, P.Rahkila, P.J.Sapple, J.Saren, C.Scholey, J.Simpson, J.Sorri, P.D.Stevenson, J.Uusitalo, H.V.Watkins, J.L.Wood

Excited states and reduced transition probabilities in 168Os

NUCLEAR REACTIONS 92Mo(78Kr, 2p), E=335, 345, 348 MeV; measured Eγ, Iγ, γγ-, (recoil)γ-coin, level half-lives by recoil-distance method using a plunger device, RITU separator, GREAT spectrometer, JUROGAM array at Jyvaskyla accelerator facility. 168Os; deduced high-spin levels, J, π, bands, B(E2), B(E1), transition quadrupole and dipole moments. Comparisons with interacting boson model (IBM-2) calculations based on the SkM* energy-density functional. Systematics of ground bands, and excited positive-parity level energies up to 8+ in 168,170,172,174,176,178,180,182,184Os.

doi: 10.1103/PhysRevC.94.044327
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2016JA07      Yuan.Wul.Ping. 33, 141 (2016); Nucl.Phys.Rev. 33, 141 (2016)

U.Jakobsson, J.Uusitalo, K.Auranen, H.Badran, B.Cederwall, D.M.Cox, T.Grahn, P.T.Greenlees, R.Julin, S.Juutinen, A.Herzan, J.Konki, M.Leino, M.Mallaburn, J.Pakarinen, P.Papadakis, J.Partanen, P.Rahkila, M.Sandzelius, J.Saren, C.Scholey, J.Sorri, S.Stolze

Spectroscopy of Low-lying States in Odd-Z Odd-A Nuclei Beyond Lead

RADIOACTIVITY 199,201At, 203,205Fr(IT); measured decay products, Eγ, Iγ; deduced level energies, J, π.

doi: 10.11804/NuclPhysRev.33.02.141
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2016JO01      Phys.Rev. C 93, 024307 (2016)

D.T.Joss, G.D.Dracoulis, E.Higgins, M.Lewis, J.Thomson, G.J.Lane, R.D.Page, J.Simpson, L.Bianco, B.Cederwall, I.G.Darby, P.M.Davidson, S.Eeckhaudt, S.Erturk, B.Fabricius, M.B.Gomez Hornillos, T.Grahn, P.T.Greenlees, B.Hadinia, U.Jakobsson, P.M.Jones, R.Julin, S.Juutinen, S.Ketelhut, M.Leino, P.Nieminen, M.Nyman, J.Pakarinen, E.S.Paul, P.Peura, P.Rahkila, P.Ruotsalainen, M.Sandzelius, P.J.Sapple, J.Saren, C.Scholey, J.Sorri, J.Uusitalo

Evolving collective structures in the transitional nuclei 162W and 164W

NUCLEAR REACTIONS 106Cd(60Ni, 2p), (60Ni, 2n2p), E=270 MeV; measured Eγ, Iγ, γγ-, (recoils)γγ-coin, Recoils-α-α-α-γ correlated spectra, γγ(θ)(DCO) using RITU separator, GREAT spectrometer and JUROGAM array at Jyvaskyla accelerator laboratory. 162,164W; deduced high-spin levels, J, π, bands, multipolarity, B(E1), B(E1)/B(E2) ratios, configurations, rotational alignments. Comparison with predictions of the cranked shell model.

doi: 10.1103/PhysRevC.93.024307
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2016LI13      Phys.Rev. C 93, 034309 (2016)

H.J.Li, B.Cederwall, M.Doncel, J.Peng, Q.B.Chen, S.Q.Zhang, P.W.Zhao, J.Meng, T.Back, U.Jakobsson, K.Auranen, S.Bonig, M.Drummond, T.Grahn, P.Greenlees, A.Herzan, D.T.Joss, R.Julin, S.Juutinen, J.Konki, T.Kroll, M.Leino, C.McPeake, D.O'Donnell, R.D.Page, J.Pakarinen, J.Partanen, P.Peura, P.Rahkila, P.Ruotsalainen, M.Sandzelius, J.Saren, B.Saygi, C.Scholey, J.Sorri, S.Stolze, M.J.Taylor, A.Thornthwaite, J.Uusitalo, Z.G.Xiao

Lifetime measurements in 166Re: Collective versus magnetic rotation

NUCLEAR REACTIONS 92Mo(78Kr, n3p), E=380 MeV; measured Eγ, Iγ, recoil-gated γγ-coin, level half-lives by recoil distance Doppler-shift (RDDS) method and differential decay-curve analysis using JUROGAM-II array for γ detection, RITU separator, and GREAT spectrometer at Jyvaskyla accelerator facility. 166Re; deduced high-spin levels, J, π, B(M1), B(E2), B(E1), B(M1)/B(E2) configurations, alignments; discussed collective versus magnetic rotation; calculated total Routhian surface plot. Tilted-axis cranking calculations based on a relativistic mean-field approach (TAC-RMF).

doi: 10.1103/PhysRevC.93.034309
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2016PA28      Phys.Rev. C 94, 014307 (2016)

E.Parr, J.F.Smith, P.T.Greenlees, M.Smolen, P.Papadakis, K.Auranen, R.Chapman, D.M.Cullen, T.Grahn, L.Grocutt, A.Herzan, R.-D.Herzberg, D.Hodge, U.Jakobsson, R.Julin, S.Juutinen, J.Konki, M.Leino, C.McPeake, D.Mengoni, A.K.Mistry, K.F.Mulholland, G.G.O'Neill, J.Pakarinen, J.Partanen, P.Peura, P.Rahkila, P.Ruotsalainen, M.Sandzelius, J.Saren, M.Scheck, C.Scholey, J.Sorri, S.Stolze, M.J.Taylor, J.Uusitalo

Identification of the Jπ = 1- state in 218Ra populated via α decay of 222Th

RADIOACTIVITY 222Th(α)[from 208Pb(18O, 4n), E=95 MeV using RITU separator at Jyvaskyla accelerator facility]; measured Eγ, Iγ, Eα, Iα, x rays, αγ-coin, (recoil)α and (recoil)αα correlations, half-life of 222Th decay using two double-sided silicon-strip detectors (DSSDs) for particles and HPGe clover detectors for γ rays. 218Ra; deduced levels, J, π, 1- state, α branching ratios, α hindrance factors. 213Rn, 219Ra, 221Th(α); observed αγ-coin. Systematics of level energies and α hindrance factors for 1- and 3- states in 218,220,222Rn, 218,220,222,224,226,228Ra, 224,226,228,230,232Th. Comparison with previous experimental results.

doi: 10.1103/PhysRevC.94.014307
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2015AU01      Phys.Rev. C 91, 024324 (2015); Erratum Phys.Rev. C 92, 039901 (2015)

K.Auranen, J.Uusitalo, S.Juutinen, U.Jakobsson, T.Grahn, P.T.Greenlees, K.Hauschild, A.Herzan, R.Julin, J.Konki, M.Leino, J.Pakarinen, J.Partanen, P.Peura, P.Rahkila, P.Ruotsalainen, M.Sandzelius, J.Saren, C.Scholey, J.Sorri, S.Stolze

Spectroscopy of 201At including the observation of a shears band and the 29/2+ isomeric state

NUCLEAR REACTIONS 165Ho(40Ar, 4n)201At, E=172 MeV; measured Eα, Eγ, Iγ, γγ-, (ce)γ-, (recoil)γ-coin, isomer half-life by (recoil)γγ(t), γ(θ) using RITU separator and JUROGAMII array at Jyvaskyla accelerator facility. 201At; deduced high-spin levels, J, π, K/(L+M+..) ratios, multipolarity, B(M1)/B(E2), B(E2), B(E3), configurations, magnetic-dipole rotational (shears) band. Systematics of energies and B(M1)/B(E2) values in N=110-126, odd-A At and even-A Po nuclei.

doi: 10.1103/PhysRevC.91.024324
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2015CA04      Acta Phys.Pol. B46, 695 (2015)

R.J.Carroll, R.D.Page, D.T.Joss, J.Uusitalo, I.G.Darby, K.Andgren, B.Cederwall, S.Eeckhaudt, T.Grahn, C.Gray-Jones, P.T.Greenlees, B.Hadinia, P.M.Jones, R.Julin, S.Juutinen, M.Leino, A.-P.Leppanen, M.Nyman, D.O'Donnell, J.Pakarinen, P.Rahkila, M.Sandzelius, J.Saren, C.Scholey, D.Seweryniak, J.Simpson

Competing Decay Modes of a High-spin Isomer in the Proton-unbound Nucleus 158Ta

RADIOACTIVITY 158Ta(α), 154Lu(β+), 154Yb(α) [from 102Pd(58Ni, X)158Ta, E=255 MeV]; measured decay products, Eγ, Iγ; deduced energy levels, isomeric states, J, π, T1/2. Comparison with available data.

doi: 10.5506/APhysPolB.46.695
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2015DA03      Phys.Rev. C 91, 034319 (2015)

T.R.Davis-Merry, D.T.Joss, R.D.Page, J.Simpson, E.S.Paul, F.A.Ali, L.Bianco, R.J.Carroll, B.Cederwall, I.G.Darby, M.C.Drummond, S.Eeckhaudt, S.Erturk, M.B.Gomez Hornillos, T.Grahn, P.T.Greenlees, B.Hadinia, U.Jakobsson, P.M.Jones, R.Julin, S.Juutinen, S.Ketelhut, M.Leino, P.Nieminen, M.Nyman, D.O'Donnell, J.Pakarinen, P.Peura, P.Rahkila, J.P.Revill, P.Ruotsalainen, M.Sandzelius, P.J.Sapple, J.Saren, B.Saygi, C.Scholey, J.Sorri, J.Thomson, J.Uusitalo

Collective excitations in the transitional nuclei 163Re and 165Re

NUCLEAR REACTIONS 106Cd(60Ni, 2np)163Re, E=270 MeV; 92Mo(78Kr, 2n3p), E=380 MeV; measured Eγ, Iγ, (recoil)γ-, (recoil)α-, αγ-, γγ-coin, Eα using RITU separator, GREAT spectrometer and JUROGAM array at K130 cyclotron facility of JYFL. Recoil-decay correlation technique. 163,165Re; deduced levels, J, π, bands, configuration. Comparison with cranked shell model predictions. Systematics of low-lying excited states in 161,163,165,167,169,171,173,175,177Re.

RADIOACTIVITY 155Lu, 158Hf, 160,162,163W, 159,160,161mTa, 164,165m,166Re, 164,166,167Os, 167,168Ir(α); measured Eα, αα-correlations, αγ-coin.

doi: 10.1103/PhysRevC.91.034319
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2015DO04      Phys.Rev. C 91, 061304 (2015)

M.Doncel, T.Back, D.M.Cullen, D.Hodge, C.Qi, B.Cederwall, M.J.Taylor, M.Procter, K.Auranen, T.Grahn, P.T.Greenlees, U.Jakobsson, R.Julin, S.Juutinen, A.Herzan, J.Konki, M.Leino, J.Pakarinen, J.Partanen, P.Peura, P.Rahkila, P.Ruotsalainen, M.Sandzelius, J.Saren, C.Scholey, J.Sorri, S.Stolze, J.Uusitalo

Lifetime measurement of the first excited 2+ state in 112Te

NUCLEAR REACTIONS 58Ni(58Ni, 4p), E=250 MeV; measured Eγ, Iγ, γγ-coin, half-life of the first 2+ state by RDDS method using RITU gas-filled recoil separator, and Differential Plunger DPUNS, Jurogam II array at JYFL accelerator facility. 112Te; deduced level, B(E2) for the first 2+ state. Comparison with shell-model calculations. Systematics of experimental and theoretical values of B(E2) for first 2+ states in 104,106,108,110,112,114,116,118,120,122,124,126,128,130,132Te.

doi: 10.1103/PhysRevC.91.061304
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2015HE27      Phys.Rev. C 92, 044310 (2015)

A.Herzan, S.Juutinen, K.Auranen, T.Grahn, P.T.Greenlees, K.Hauschild, U.Jakobsson, P.Jones, R.Julin, S.Ketelhut, M.Leino, A.Lopez-Martens, P.Nieminen, M.Nyman, P.Peura, P.Rahkila, S.Rinta-Antila, P.Ruotsalainen, M.Sandzelius, J.Saren, C.Scholey, J.Sorri, J.Uusitalo

Detailed spectroscopy of 193Bi

NUCLEAR REACTIONS 165Ho(32S, 4n), E=152 MeV; measured prompt and delayed Eγ, Iγ, γγ-, γγγ-, (recoil)γ-, (ce)γ-coin, E(ce), I(ce), γγ(θ)(DCO), γγ(lin pol), T1/2 of isomeric states using JUROGAM II array, gas-filled recoil separator, and GREAT spectrometer at Jyvaskyla. Recoil-decay tagging, and isomer tagging methods. 193Bi; deduced high-spin levels, J, π, ICC, multipolarity, configurations, deformation, rotational band features, superdeformed band, isomers, B(M1)/B(E2), aligned angular momenta, two-state mixing, oblate and spherical shapes. Comparison with cranked shell model calculations, and with level-energy systematics of A=191-207, odd-A Bi isotopes.

RADIOACTIVITY 192,193Bi(α)[from 165Ho(32S, xn), E=152 MeV]; measured Eα, T1/2 of 193Bi g.s.

doi: 10.1103/PhysRevC.92.044310
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2015HO14      Phys.Rev. C 92, 054312 (2015)

D.Hodge, D.M.Cullen, M.J.Taylor, M.G.Procter, P.Nieminen, T.Grahn, P.T.Greenlees, K.Hauschild, A.Herzan, U.Jakobsson, P.Jones, R.Julin, S.Juutinen, S.Ketelhut, M.Leino, A.Lopez-Martens, J.Partanen, P.Peura, P.Rahkila, S.Rinta-Antila, P.Ruotsalainen, M.Sandzelius, J.Saren, C.Scholey, J.Sorri, S.Stolze, J.Uusitalo

Identification of a dipole band above the Iπ = 31/2- isomeric state in 189Pb

NUCLEAR REACTIONS 106Pd(86Kr, 3n), 106Pd(86Kr, 2np), E=355 MeV; measured Eγ, Iγ, γγ, x rays, recoil-isomer-tagged prompt γγ-coin and prompt-delayed and delayed-delayed γγ-coin, angular intensity ratios using RITU separator, GREAT spectrometer and JUROGAM-II array at Jyvaskyla. 189Pb, 189Tl; deduced high-spin levels, J, π, isomer, dipole band, conversion coefficients, multipolarities, configuration, and alignments. Systematics of dipole bands in 189,191,193,195,197,199Pb, and differences in the proton/neutron-hole interaction.

doi: 10.1103/PhysRevC.92.054312
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2015LI24      Phys.Rev. C 92, 014326 (2015)

H.J.Li, B.Cederwall, T.Back, C.Qi, M.Doncel, U.Jakobsson, K.Auranen, S.Bonig, M.C.Drummond, T.Grahn, P.Greenlees, A.Herzan, R.Julin, S.Juutinen, J.Konki, T.Kroll, M.Leino, C.McPeake, D.O'Donnell, R.D.Page, J.Pakarinen, J.Partanen, P.Peura, P.Rahkila, P.Ruotsalainen, M.Sandzelius, J.Saren, B.Saygi, C.Scholey, J.Sorri, S.Stolze, M.J.Taylor, A.Thornthwaite, J.Uusitalo, Z.G.Xiao

Recoil-decay tagging spectroscopy of 16274W88

NUCLEAR REACTIONS 92Mo(78Kr, 2α), E=380 MeV; measured Eγ, Iγ, Eα, Iα, αγ-, γγ-coin, (recoil)αα-correlations, level half-lives using JUROGAM-II array, RITU separator and GREAT spectrometer at K-130 cyclotron facility of University of Jyvaskyla. Recoil-decay tagging method. 162W; deduced high-spin levels, J, π, multipolarity, yrast band, configuration, Routhians, alignments; calculated total Routhian Surfaces (TRS) using cranked shell model, α-formation probability. Systematics of experimental Routhians and aligned angular momenta in 162,164W and 160Hf. Systematics of energies of yrast bands in 158,160,162,164,166,168W.

RADIOACTIVITY 162W, 166Os(α); measured Eα, Iα, half-lives of 166Os and 162W ground states.

doi: 10.1103/PhysRevC.92.014326
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2015LI26      Phys.Rev. C 92, 014310 (2015)

H.J.Li, M.Doncel, M.Patial, B.Cederwall, T.Back, U.Jakobsson, K.Auranen, S.Bonig, M.Drummond, T.Grahn, P.Greenlees, A.Herzan, D.T.Joss, R.Julin, S.Juutinen, J.Konki, T.Kroll, M.Leino, C.McPeake, D.O'Donnell, R.D.Page, J.Pakarinen, J.Partanen, P.Peura, P.Rahkila, P.Ruotsalainen, M.Sandzelius, J.Saren, B.Saygi, C.Scholey, J.Sorri, S.Stolze, M.J.Taylor, A.Thornthwaite, J.Uusitalo, Z.G.Xiao

First identification of rotational band structures in 75166Re91

NUCLEAR REACTIONS 92Mo(78Kr, n3p), E=380 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ)(DCO), reaction products using JUROGAM II γ-ray spectrometer, RITU separator, GREAT spectrometer and Si detectors at Jyvaskyla accelerator facility. Recoil-decay tagging technique. 166Re; deduced high-spin levels, J, π, rotational bands, multipolarity, Nilsson configuration, B(M1)/B(E2), alignment plots, anomalous signature inversion, energy staggering. Calculated total Routhian surfaces (TRS). Cranked shell model and particle-rotor mode calculations.

doi: 10.1103/PhysRevC.92.014310
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2015NY02      Eur.Phys.J. A 51, 31 (2015)

M.Nyman, S.Juutinen, D.M.Cullen, I.Darby, S.Eeckhaudt, T.Grahn, P.T.Greenlees, A.Herzan, U.Jakobsson, P.Jones, R.Julin, H.Kettunen, M.Leino, A.-P.Leppanen, P.Nieminen, J.Pakarinen, P.Rahkila, M.Sandzelius, J.Saren, C.Scholey, J.Uusitalo

First observation of superdeformed states in 191Bi

NUCLEAR REACTIONS 109Ag(86Kr, 4n), E=380 MeV; measured prompt Eα, Iα, Eγ, Iγ(θ), (recoil)α-coin, (recoil)γ-coin, γγ-coin, αγ-coin using JUROGAM. 191Bi deduced γ transitions, levels, J, π, rotational bands, deformed bands, superdeformed bands, transition multipolarity, moments of inertia.

doi: 10.1140/epja/i2015-15031-2
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2015PE10      Phys.Rev. C 92, 034314 (2015)

C.M.Petrache, I.Ragnarsson, H.Naidja, F.Nowacki, R.Leguillon, T.Zerrouki, P.T.Greenlees, U.Jakobsson, P.Jones, R.Julin, S.Juutinen, S.Ketelhut, M.Leino, M.Nyman, P.Peura, P.Rahkila, P.Ruotsalainen, J.Saren, C.Scholey, J.Sorri, J.Uusitalo

Search for the terminating 27- state in 140Nd

NUCLEAR REACTIONS 96Zr(48Ca, 4n), E=180 MeV; measured Eγ, Iγ, γγ-coin, γ(θ) using JUROGAM array and GREAT spectrometer at K-130 cyclotron facility of University of Jyvaskyla. 140Nd; deduced high-spin levels, J, π, multipolarity, configurations, fully aligned terminating state, shape coexistence. Comparison with cranked Nilsson-Strutinsky (CNS) calculations, and shell-model calculations for close-to-spherical and the triaxial states.

doi: 10.1103/PhysRevC.92.034314
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2015TA12      Phys.Rev. C 91, 044322 (2015)

M.J.Taylor, D.M.Cullen, M.G.Procter, A.J.Smith, A.McFarlane, V.Twist, G.A.Alharshan, L.S.Ferreira, E.Maglione, K.Auranen, T.Grahn, P.T.Greenlees, K.Hauschild, A.Herzan, U.Jakobsson, R.Julin, S.Juutinen, S.Ketelhut, J.Konki, M.Leino, A.Lopez-Martens, J.Pakarinen, J.Partanen, P.Peura, P.Rahkila, S.Rinta-Antila, P.Ruotsalainen, M.Sandzelius, J.Saren, C.Scholey, J.Sorri, S.Stolze, J.Uusitalo, M.Doncel

Oblately deformed isomeric proton-emitting state in 151Lu

NUCLEAR REACTIONS 96Ru(58Ni, 2np), E=290 MeV; measured reaction products using RITU separator and GREAT spectrometer, Eγ, Iγ, γγ-, pγ-, (recoils)γ-coin, E(p), I(p), half-lives of the ground state and an isomer from proton-decay curves, level half-lives by recoil-distance Doppler shift method using a plunger device at the University of Jyvaskyla Accelerator Laboratory. Recoil-decay tagging method. 151Lu; deduced levels, J, π, bands, configuration. Comparison with nonadiabatic quasiparticle model calculations.

RADIOACTIVITY 151Lu(p)[from 96Ru(58Ni, 2np), E=290 MeV]; measured E(p), I(p), half-lives of ground state and isomer; deduced deformation parameters, configuration. Comparison with nonadiabatic quasiparticle model calculations, and with previous experimental results. 149Tb, 150,151Dy, 151,151mHo, 152Er, 153,154Tm, 154,155Yb, 156Lu(α); observed α lines in the charged-particle spectrum.

doi: 10.1103/PhysRevC.91.044322
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2015WA02      Phys.Lett. B 740, 243 (2015)

P.T.Wady, J.F.Smith, B.Hadinia, D.M.Cullen, S.J.Freeman, I.G.Darby, S.Eeckhaudt, T.Grahn, P.T.Greenlees, P.M.Jones, R.Julin, S.Juutinen, H.Kettunen, M.Leino, A.-P.Leppanen, B.M.McGuirk, P.Nieminen, M.Nyman, R.D.Page, J.Pakarinen, E.S.Paul, P.Rahkila, S.V.Rigby, C.Scholey, J.Uusitalo, R.Wadsworth

High-spin states beyond the proton drip-line: Quasiparticle alignments in 113Cs

NUCLEAR REACTIONS 58Ni(58Ni, X)113Cs, E=230 MeV; measured reaction products, Eγ, Iγ; deduced γ-ray energies and intensities, deformations. Calculated Quasiparticle Routhians from Woods-Saxon cranked-shell model for neutrons and protons.

doi: 10.1016/j.physletb.2014.11.045
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2014AU03      Phys.Rev. C 90, 024310 (2014)

K.Auranen, J.Uusitalo, S.Juutinen, U.Jakobsson, T.Grahn, P.T.Greenlees, K.Hauschild, A.Herzan, R.Julin, J.Konki, M.Leino, J.Pakarinen, J.Partanen, P.Peura, P.Rahkila, P.Ruotsalainen, M.Sandzelius, J.Saren, C.Scholey, J.Sorri, S.Stolze

Experimental study of 1/2+ isomers in 199, 201At

NUCLEAR REACTIONS 165Ho(40Ar, 4n)201At, E=172 MeV; 165Ho(40Ar, 6n)199At, E=205 MeV; measured Eγ, Iγ, γ(θ), angular asymmetry, Eα, ce, recoil-, and α-tagged γ and ce spectra, γγ-, (ce)γ-coin using RITU separator JUROGAM2 array, and GREAT spectrometer at JYFL accelerator facility. 199,201At; deduced levels, isomers, J, π, half-lives of 1/2+ isomers, multipolarity, B(E3), configuration. Systematics of low-lying states in odd-A nuclides of Bi, At, Fr and Tl with N(even)=102-126.

doi: 10.1103/PhysRevC.90.024310
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2014CA03      Phys.Rev.Lett. 112, 092501 (2014)

R.J.Carroll, R.D.Page, D.T.Joss, J.Uusitalo, I.G.Darby, K.Andgren, B.Cederwall, S.Eeckhaudt, T.Grahn, C.Gray-Jones, P.T.Greenlees, B.Hadinia, P.M.Jones, R.Julin, S.Juutinen, M.Leino, A.-P.Leppanen, M.Nyman, D.O'Donnell, J.Pakarinen, P.Rahkila, M.Sandzelius, J.Saren, C.Scholey, D.Seweryniak, J.Simpson

Blurring the Boundaries: Decays of Multiparticle Isomers at the Proton Drip Line

NUCLEAR REACTIONS 102Pd(58Ni, X)158Ta/157Lu/157Hf, E=255 MeV; measured reaction products, Eγ, Iγ; deduced σ.

RADIOACTIVITY 158Ta(IT), (α); measured decay products, Eγ, Iγ; deduced energy levels, J, π, high-spin, spin-trap isomer T1/2, α-decay branch. Comparison with available data.

doi: 10.1103/PhysRevLett.112.092501
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2014DR02      Phys.Rev. C 89, 064309 (2014)

M.C.Drummond, D.O'Donnell, R.D.Page, D.T.Joss, L.Capponi, D.M.Cox, I.G.Darby, L.Donosa, F.Filmer, T.Grahn, P.T.Greenlees, K.Hauschild, A.Herzan, U.Jakobsson, P.M.Jones, R.Julin, S.Juutinen, S.Ketelhut, M.Leino, A.Lopez-Martens, A.K.Mistry, P.Nieminen, P.Peura, P.Rahkila, S.Rinta-Antila, P.Ruotsalainen, M.Sandzelius, J.Saren, B.Saygi, C.Scholey, J.Simpson, J.Sorri, A.Thornthwaite, J.Uusitalo

α decay of the πh11/2 isomer in 164Ir

RADIOACTIVITY 164,165Ir(p), (α)[from 92Mo(78Kr, xnp), E=428, 435, 450 MeV]; 163Os(α)[from 164Ir p decay]; 160Re(p)[from 164Ir α decay]; measured E(p), I(p), E(α), I(α), production σ for 164Ir, recoil-pα-, pα-, αα-correlated events, half-lives, α-decay branching ratio of 164Ir decay using RITU separator and GREAT spectrometer at JYFL accelerator facility; deduced α- and proton-decay reduced widths. 160Re; deduced level energy of the isomer. 162,163Ir(α); estimated half-lives and α-particle branching ratios. 155Lu, 156Hf, 158W, 160,161W, 161,162,163Re, 164Os(α); observed α lines in particle spectrum. Comparison with previous experimental results. Systematics of α-decay widths and Q values for πh11/2 states in Z=73-78, N=84-92 nuclei.

doi: 10.1103/PhysRevC.89.064309
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2014HE29      Phys.Rev. C 90, 051303 (2014)

J.Henderson, D.G.Jenkins, K.Kaneko, P.Ruotsalainen, P.Sarriguren, K.Auranen, M.A.Bentley, P.J.Davies, A.Gorgen, T.Grahn, P.T.Greenlees, A.Hay, T.W.Henry, A.Herzan, U.Jakobsson, R.Julin, S.Juutinen, J.Konki, M.Leino, C.McPeake, S.Milne, A.J.Nichols, J.Pakarinen, P.Papadakis, J.Partanen, P.Peura, P.Rahkila, E.Sahin, M.Sandzelius, J.Saren, C.Scholey, M.Siciliano, L.Sinclair, J.Sorri, S.Stolze, J.Uusitalo, R.Wadsworth, M.Zielinska

Spectroscopy on the proton drip-line: Probing the structure dependence of isospin nonconserving interactions

NUCLEAR REACTIONS 40Ca(36Ar, 2n)74Sr, E=105 MeV; measured Eγ, Iγ, γγ-coin, Eβ, ΔE-E, TOF, half-lives of 74Sr and 74Rb ground states using RITU separator and JUROGAM II array at Jyvaskyla K130 cyclotron facility. Recoil-beta tagging technique. 74Sr, 74Rb; deduced levels, J, π, T=1 triplet energy differences (TEDs) for 74Sr, 74Rb and 74Kr. Comparison with State-of-the-art shell-model calculations using the JUN45 interaction, and isospin nonconserving (INC) interaction.

RADIOACTIVITY 74Sr, 74Rb(β+)[from 40Ca(36Ar, X), E=105 MeV]; measured half-lives of ground states.

doi: 10.1103/PhysRevC.90.051303
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2014MA91      Phys.Rev. C 90, 054331 (2014)

P.J.R.Mason, J.Simpson, E.S.Paul, M.A.Riley, K.Auranen, H.Badran, J.S.Baron, A. J. Boston, T.Davis-Merry, T.Grahn, P.T.Greenlees, A.Herzan, U.Jakobsson, D.T.Joss, R.Julin, S.Juutinen, J.Konki, M.Leino, C.McPeake, S.L.Miller, G.O'Neill, J.Pakarinen, P.Papadakis, J.Partanen, P.Peura, P.Rahkila, P.Ruotsalainen, M.Sandzelius, J.Saren, C.Scholey, J.F.Sharpey-Schafer, L.Sinclair, J.Sorri, S.Stolze, J.Uusitalo, K.Villafani, F.Wearing, J.P.Wright

Spectroscopy of 161Hf from low to high spin

NUCLEAR REACTIONS 118Sn(48Ti, 5n), E=240 MeV; 110Pd(56Fe, 5n), E=270 MeV; measured evaporation residues using RITU separator, Eγ, Iγ, γγ-coin, γ(θ), delayed γ spectra, γ(t), isomer half-life using Jurogam-II array and recoil-decay tagging technique at Jyvaskyla accelerator facility. 161Hf; deduced high-spin levels, J, π, bands, K-shell conversion coefficients from γ and x-ray spectra, B(M2), alignments, configurations, Routhians. Comparison with Woods-Saxon cranked shell-model calculations.

doi: 10.1103/PhysRevC.90.054331
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2014PE02      Phys.Rev. C 89, 024316 (2014)

P.Peura, C.Scholey, D.T.Joss, S.Juutinen, R.Julin, T.Back, B.Cederwall, P.T.Greenlees, U.Jakobsson, P.Jones, D.S.Judson, S.Ketelhut, M.Labiche, M.Leino, M.Nyman, D.O'Donnell, R.D.Page, P.Rahkila, P.Ruotsalainen, M.Sandzelius, P.J.Sapple, J.Saren, J.Simpson, J.Thomson, J.Uusitalo, H.V.Watkins

Quasiparticle alignments and α-decay fine structure of 175Pt

RADIOACTIVITY 175Pt(α)[from 92Mo(86Sr, n2p)]; measured Eα, Iα, Eγ, ce, half-life, α-branching ratio. 171Os; deduced levels, J, π, K-conversion coefficient, multipolarity, reduced widths, α hindrance factors. 171,172Ir, 174Pt(α); measured Eα, half-life. 172,173,176Pt, 175Au(α); observed α lines.

NUCLEAR REACTIONS 92Mo(86Sr, n2p), E=403 MeV; measured Eγ, Iγ, Eα, γγ-, γα-, (particle)γ-coin, γ(θ), angular anisotropy using RITU separator, JUROGAM-I array and GREAT spectrometer at JYFL-cyclotron facility. Recoil-decay tagging technique. 175Pt; deduced high-spin levels, J, π, multipolarity, bands, B(M1)/B(E2), configurations, alignment plots for 169Hf, 171W, 173Os and 175Pt, proton-pair excitations in the rotating core; calculated single-particle Routhians for quasineutrons and quasiprotons using cranked shell-model formalism. 167,168Re, 171,172,174Os, 174,176Pt, 175Ir; observed γ rays.

doi: 10.1103/PhysRevC.89.024316
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2014SM02      Phys.Lett. B 732, 161 (2014)

J.Smallcombe, P.J.Davies, C.J.Barton, D.G.Jenkins, L.L.Andersson, P.A.Butler, D.M.Cox, R.-D.Herzberg, A.Mistry, E.Parr, T.Grahn, P.T.Greenlees, K.Hauschild, A.Herzan, U.Jakobsson, P.Jones, R.Julin, S.Juutinen, S.Ketelhut, M.Leino, A.Lopez-Martens, P.Nieminen, J.Pakarinen, P.Papadakis, P.Peura, P.Rahkila, S.Rinta-Antila, P.Ruotsalainen, M.Sandzelius, J.Saren, C.Scholey, J.Sorri, J.Uusitalo

Experimental investigation of the O+2 band in 154Sm as a β-vibrational band

NUCLEAR REACTIONS 154Sm(16O, 16O'), E=65 MeV; measured reaction products, Eγ, Iγ, Eβ, Iβ. 154Sm; deduced ICC, monopole transition strengths, collective band. IBM calculations.

doi: 10.1016/j.physletb.2014.03.034
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2013AN08      Acta Phys.Pol. B44, 387 (2013)

S.Antalic, F.P.Hessberger, D.Ackermann, M.Block, S.Heinz, S.Hofmann, Z.Kalaninova, B.Kindler, M.Leino, B.Lommel, R.Mann, K.Nishio, S.Saro, B.Sulignano

Nuclear Structure of Heavy N = 153 Isotones

NUCLEAR REACTIONS 206Pb(54Cr, n)259Sg, E=257-270 MeV; measured reaction products; deduced σ.

RADIOACTIVITY 259Sg(α) [from 206Pb(54Cr, n)259Sg, E=257-270 MeV]; measured decay products, Eα, Iα; deduced T1/2 for isomeric states.

doi: 10.5506/APhysPolB.44.387
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2013BV01      Phys.Rev. C 87, 044333 (2013)

S.P.Bvumbi, J.F.Sharpey-Schafer, P.M.Jones, S.M.Mullins, B.M.Nyako, K.Juhasz, R.A.Bark, L.Bianco, D.M.Cullen, D.Curien, P.E.Garrett, P.T.Greenlees, J.Hirvonen, U.Jakobsson, J.Kau, F.Komati, R.Julin, S.Juutinen, S.Ketelhut, A.Korichi, E.A.Lawrie, J.J.Lawrie, M.Leino, T.E.Madiba, S.N.T.Majola, P.Maine, A.Minkova, N.J.Ncapayi, P.Nieminen, P.Peura, P.Rahkila, L.L.Riedinger, P.Ruotsalainen, J.Saren, C.Scholey, J.Sorri, S.Stolze, J.Timar, J.Uusitalo, P.A.Vymers

Octupole correlations in the structure of 02+ bands in the N=88 nuclei 150Sm and 152Gd

NUCLEAR REACTIONS 152Sm(α, 4n), E=45 MeV; 148Nd(α, 2n), E=25 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ)(DCO), γ(θ, lin pol) using the AFRODITE at iThemba LABS, and JUROGAM II arrays at Jyvaskyla. 150Sm, 152Gd; deduced high-spin levels, J, π, bands, B(E1)/B(E2). Comparison of rotational frequencies with those in 220Rn bands. Permanent octupole deformation in first excited Kπ=0+ band. Comparison with Frauendorf's tidal wave model.

doi: 10.1103/PhysRevC.87.044333
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2013DR06      Phys.Rev. C 87, 054309 (2013)

M.C.Drummond, D.T.Joss, R.D.Page, J.Simpson, D.O'Donnell, K.Andgren, L.Bianco, B.Cederwall, I.G.Darby, S.Eeckhaudt, M.B.Gomez Hornillos, T.Grahn, P.T.Greenlees, B.Hadinia, P.M.Jones, R.Julin, S.Juutinen, S.Ketelhut, A.-P.Leppanen, M.Leino, M.Nyman, J.Pakarinen, P.Rahkila, M.Sandzelius, P.J.Sapple, J.Saren, B.Saygi, C.Scholey, J.Sorri, J.Thomson, J.Uusitalo, M.Venhart

Low-lying excited states in the neutron-deficient isotopes 163Os and 165Os

NUCLEAR REACTIONS 106Cd(60Ni, 3n), E=270 MeV; 92Mo(78Kr, 3n2p), E=357 MeV; measured Eγ, Iγ, Eα, (recoil)γ-, αγ-, γγ-coin, γ(θ) using JUROGAM, GREAT spectrometers, and RITU separator at Jyvaskyla accelerator facility. 163,165Os; deduced high-spin levels, J, π, bands, multipolarity, configurations. Recoil-decay tagging technique. Systematic of band structures in 163W, 162,163,164,165,167Os.

RADIOACTIVITY 163,165Os(α)[from 106Cd(60Ni, 3n), E=270 MeV and 92Mo(78Kr, 3n2p), E=357 MeV]; measured Eα, Iα, half-lives, α branching ratio.

doi: 10.1103/PhysRevC.87.054309
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2013JA06      Phys.Rev. C 87, 054320 (2013)

U.Jakobsson, S.Juutinen, J.Uusitalo, M.Leino, K.Auranen, T.Enqvist, P.T.Greenlees, K.Hauschild, P.Jones, R.Julin, S.Ketelhut, P.Kuusiniemi, M.Nyman, P.Peura, P.Rahkila, P.Ruotsalainen, J.Saren, C.Scholey, J.Sorri

Spectroscopy of the proton drip-line nucleus 203Fr

NUCLEAR REACTIONS 169Tm(40Ar, 6n), E=205 MeV; measured reaction products, Eγ, Iγ, Eα, Iα, E(ce), I(ce), (recoils)α-, (recoils)γ-, (ce)γ-, (ce)α-coin, T1/2 using RITU separator, GREAT spectrometer and JUROGAM array at JYFL facility. 203Fr; deduced high-spin levels, J, π, multipolarity, B(M2), B(E3), configuration. Recoil-decay tagging (RDT) technique. 169Tm, 203,204Rn, 204Fr; observed prompt γ rays. Systematics of low-lying negative-parity states in 203,205,207,209,211Fr together with yrast positive-parity states in 198,200,202,204,206,208,210,212Rn.

RADIOACTIVITY 203Fr, 199At(α)[from 169Tm(40Ar, 6n)203Fr, E=205 MeV]; measured Eγ, Iγ, Eα, Iα, E(ce), I(ce), (recoils)α-, (recoils)γ-, (recoils)(ce)-, γγ-, (ce)α-, (ce)γ-coin, T1/2, α branching ratio using RITU separator, GREAT spectrometer and JUROGAM array at JYFL. 203Fr, 199At, 195Bi; deduced levels, J, π. 198At, 202,204Fr; measured Eα, T1/2. Systematics of 13/2+ and 1/2+ states in N=102-126 Bi, At and Fr nuclei. 199,200Po, 200,201At, 202,203,204Rn(α); measured α spectrum.

doi: 10.1103/PhysRevC.87.054320
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2013LA02      Phys.Rev. C 87, 014318 (2013)

J.F.W.Lane, A.N.Andreyev, S.Antalic, D.Ackermann, J.Gerl, F.P.Hessberger, S.Hofmann, M.Huyse, H.Kettunen, A.Kleinbohl, B.Kindler, I.Kojouharov, M.Leino, B.Lommel, G.Munzenberg, K.Nishio, R.D.Page, S.Saro, H.Schaffner, M.J.Taylor, P.Van Duppen

β-delayed fission of 186, 188Bi isotopes

RADIOACTIVITY 188Bi(β+F)[from 142Nd(50Cr, 3np), E=252 MeV]; 186Bi(β+F)[from 144Sm(46Ti, 3np), E=239 MeV]; measured α, particle and fission fragment spectra, T1/2 using recoil-fission correlation technique at SHIP facility in GSI. 186,188Pb; deduced estimates of beta-delayed fission (βDF) probabilities. Comparison with β-delayed fission probabilities for 192At, 246Md.

doi: 10.1103/PhysRevC.87.014318
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2013LE22      Phys.Rev. C 88, 014323 (2013)

R.Leguillon, C.M.Petrache, T.Zerrouki, T.Konstantinopoulos, K.Hauschild, A.Korichi, A.Lopez-Martens, S.Frauendorf, I.Ragnarsson, P.T.Greenlees, U.Jakobsson, P.Jones, R.Julin, S.Juutinen, S.Ketelhut, M.Leino, P.Nieminen, M.Nyman, P.Peura, P.Rahkila, P.Ruotsalainen, M.Sandzelius, J.Saren, C.Scholey, J.Sorri, J.Uusitalo, H.Hubel, A.Neusser-Neffgen, A.Al-Khatib, A.Burger, N.Nenoff, A.K.Singh, D.Curien, G.B.Hagemann, B.Herskind, G.Sletten, P.Fallon, A.Gorgen, P.Bednarczyk, D.M.Cullen

High-spin spectroscopy of 140Nd

NUCLEAR REACTIONS 96Zr(48Ca, 4n), E=180, 195 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ) using the JUROGAM II+RITU+GREAT setup at Jyvaskyla and the EUROBALL array at the IRS in Strasbourg. Recoil-decay tagging technique. 140Nd; deduced high-spin levels, J, π, multipolarity, bands, alignments, configurations, B(M1)/B(E2), stable triaxial shape at high spin; calculated potential energy surface contours in (β2, γ) plane, single-particle Routhians using cranked Nilsson-Strutinsky and tilted axis cranking models.

doi: 10.1103/PhysRevC.88.014323
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2013NY01      Phys.Rev. C 88, 054320 (2013)

M.Nyman, S.Juutinen, I.Darby, S.Eeckhaudt, T.Grahn, P.T.Greenlees, U.Jakobsson, P.Jones, R.Julin, S.Ketelhut, H.Kettunen, M.Leino, P.Nieminen, P.Peura, P.Rahkila, J.Saren, C.Scholey, J.Sorri, J.Uusitalo, T.Enqvist

γ-ray and decay spectroscopy of 194, 195, 196At

NUCLEAR REACTIONS 147Sm(51V, 3n), E=224 MeV; measured Eγ, Iγ, γγ-, (recoil)γ-coin, Eα, (recoil)α-correlations, (recoil)α(t) using RITU gas-filled separator, GREAT spectrometer and JUROGAM array at JYFL facility. Recoil-decay tagging method. 195At; deduced levels, J, π, bands, E3 branching ratio for 7/2- isomer to 1/2+ ground state transition, moment of inertia plots, configurations. 196At; deduced isomer energy and half-life from (recoil)γ(t). 194,195Po, 197At; observed γ rays. Systematics of kinematic moment of inertia plots for bands in 188Hg, 191,193Bi, 195,197At.

RADIOACTIVITY 194,194m,195,195m,196At(α)[from 147Sm(51V, xn), E=224 MeV]; 190,190m,191,191m,192Bi(α)[from α decay of corresponding At isotopes]; measured Eα, Iα, half-lives of ground states and isomers, αγ-coin, αα-correlations; deduced hindrance factors, configurations. 191Bi; deduced levels, J, π. 194,195,196Po, 197At; observed α lines from their decays. Systematics of energies of low-lying states in N(even)=100-126 Tl, Pb, Bi, and At isotopes.194,196,198,200,202At; estimated level energies of the lowest members of proton-neutron multiplets; systematics of α energies.

doi: 10.1103/PhysRevC.88.054320
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2013PR01      Phys.Rev. C 87, 014308 (2013)

M.G.Procter, D.M.Cullen, M.J.Taylor, J.Pakarinen, K.Auranen, T.Back, T.Braunroth, B.Cederwall, A.Dewald, T.Grahn, P.T.Greenlees, U.Jakobsson, R.Julin, S.Juutinen, A.Herzan, J.Konki, M.Leino, R.Liotta, J.Partanen, P.Peura, P.Rahkila, P.Ruotsalainen, M.Sandelius, J.Saren, C.Scholey, J.Sorri, S.Stolze, J.Uusitalo, C.Qi

Isomer-tagged differential-plunger measurements in 54 113Xe

NUCLEAR REACTIONS 58Ni(58Ni, n2p), E=210 MeV; measured Eγ, Iγ, delayed and prompt γ spectra, γγ-coin, level half-lives by γ(t) and recoil distance Doppler-shift method using a plunger device DPUNS and JUROGAM-II array. Recoil-isomer tagging method. 113Xe; deduced high-spin levels, J, π, isomer, bands, B(M2), B(E2), branching ratio. B(M2), B(E2) and level systematics of Sn, Te, Xe isotopes.

doi: 10.1103/PhysRevC.87.014308
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2013PR05      Phys.Lett. B 725, 79 (2013)

M.G.Procter, D.M.Cullen, M.J.Taylor, G.A.Alharshan, L.S.Ferreira, E.Maglione, K.Auranen, T.Grahn, P.T.Greenlees, U.Jakobsson, R.Julin, A. Herzan, J.Konki, M.Leino, J.Pakarinen, J.Partanen, P.Peura, P.Rahkila, P.Ruotsalainen, M.Sandzelius, J.Saren, S.Stolze, C.Scholey, J.Sorri, J.Uusitalo, T.Braunroth, E.Ellinger, A.Dewald, D.T.Joss, C.McPeake, B.Saygi

Proton emission from an oblate nucleus 151Lu

NUCLEAR REACTIONS 96Ru(58Ni, X)151Lu, E=290 MeV; measured reaction products, Eγ, Iγ; deduced bands, level energies, J, π, oblate deformation, lifetime of the first excited state above the proton-emitting ground state. Comparison with theoretical calculations based upon a non-adiabatic deformed Woods-Saxon potential, available data.

doi: 10.1016/j.physletb.2013.06.045
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2013RU10      Phys.Rev. C 88, 024320 (2013)

P.Ruotsalainen, C.Scholey, R.Julin, K.Hauschild, K.Kaneko, B.S.Nara Singh, R.Wadsworth, D.G.Jenkins, T.S.Brock, P.T.Greenlees, J.Henderson, U.Jakobsson, P.Jones, S.Juutinen, S.Ketelhut, M.Leino, N.M.Lumley, P.J.R.Mason, P.Nieminen, M.Nyman, I.Paterson, P.Peura, M.G.Procter, P.Rahkila, J.Saren, J.Sorri, J.Uusitalo

Recoil-β tagging study of the N=Z nucleus 66As

NUCLEAR REACTIONS 40Ca(28Si, np), E=75, 83 MeV; measured reaction products, Eγ, Iγ, γ(θ), γγ(θ)(ADO ratios), βγ-, (recoil)βγ-, γγ-coin, isomer half-lives by γγ(t) using RITU separator, GREAT spectrometer and JUROGAM II array at Jyvaskyla facility. Recoil-beta tagging (RBT) and recoil-isomer tagging methods. 66As; deduced high-spin levels, isomers, J, π, T=1 band, T=0 states, conversion coefficients, multipolarity, configuration, B(E2), B(M1), oblate 3+ shape isomer. 64Zn, 65Ga, 66Ge; observed γ rays from low-lying states. Systematics of Coulomb energy differences (CEDs) for A=66, 70, 74, and 78 systems. Comparison with shell-model calculations.

doi: 10.1103/PhysRevC.88.024320
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2013RU13      Phys.Rev. C 88, 041308 (2013)

P.Ruotsalainen, D.G.Jenkins, M.A.Bentley, R.Wadsworth, C.Scholey, K.Auranen, P.J.Davies, T.Grahn, P.T.Greenlees, J.Henderson, A.Herzan, U.Jakobsson, P.Joshi, R.Julin, S.Juutinen, J.Konki, M.Leino, G.Lotay, A.J.Nichols, A.Obertelli, J.Pakarinen, J.Partanen, P.Peura, P.Rahkila, M.Sandzelius, J.Saren, J.Sorri, S.Stolze, J.Uusitalo

Spectroscopy of proton-rich 66Se up to Jπ Isospin-breaking effect in the A=66 isobaric triplet

NUCLEAR REACTIONS Ca(28Si, X), E=75 MeV; measured Eγ, Iγ, Eβ, evaporation residue spectra, βγ-, (recoil)βγ-coin, βγ(t), delayed γ using RITU separator, JUROGAMII array for γ rays and GREAT spectrometer at JYFL facility. Recoil-decay tagging method. 66Se; deduced levels, J, π; analyzed triplet energy differences (TED) and mirror energy differences (MED) for analog states in A=66 nuclei, and compared with those for A=42, 46, 50, 54 nuclei, and with shell-model predictions. 65Ge, 65Ga, 66As; observed γ rays from competing channels.

doi: 10.1103/PhysRevC.88.041308
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2013TA35      Phys.Rev. C 88, 054307 (2013)

M.J.Taylor, D.M.Cullen, M.G.Procter, T.Back, B.Cederwall, M.Doncel, T.Braunroth, A.Dewald, J.Pakarinen, T.Grahn, P.T.Greenlees, K.Auranen, U.Jakobsson, R.Julin, S.Juutinen, A.Herzan, J.Konki, M.Leino, R.Liotta, J.Partanen, P.Peura, P.Rahkila, P.Ruotsalainen, M.Sandzelius, J.Saren, J.Sorri, S.Stolze, J.Uusitalo, W.Y.Liang, F.R.Xu

Competing single-particle and collective states in the low-energy structure of 113I

NUCLEAR REACTIONS 58Ni(58Ni, 3p)113I, E=210 MeV; measured Eγ, Iγ, γγ-coin, level half-lives by RDDS method using a plunger device, Jurogam-II array, and RITU separator at JYFL facility. 113I; deduced high-spin levels, J, π, bands, B(E2). Comparison with shell-model calculations, and configuration-constrained total Routhian surface calculations.

doi: 10.1103/PhysRevC.88.054307
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2013UU01      Phys.Rev. C 87, 064304 (2013)

J.Uusitalo, J.Saren, S.Juutinen, M.Leino, S.Eeckhaudt, T.Grahn, P.T.Greenlees, U.Jakobsson, P.Jones, R.Julin, S.Ketelhut, A.-P.Leppanen, M.Nyman, J.Pakarinen, P.Rahkila, C.Scholey, A.Semchenkov, J.Sorri, A.Steer, M.Venhart

α-decay studies of the francium isotopes 198Fr and 199Fr

RADIOACTIVITY 198,199Fr(α)[from 141Pr(60Ni, xn), E=268 MeV]; measured Eα, Iα, Eγ, time-of-flight, recoil energy deposit, half-lives using RITU separator and GREAT spectrometer at JYFL facility. 198,199Fr; deduced levels, J, π, isomers, reduced α widths, speculative decay schemes. 190,191Bi, 194,195,196At, 200Fr(α); measured Eα, half-lives of ground states and isomers; deduced reduced α widths, speculative decay schemes. Comparison with calculated half-lives. 186,187Tl, 190,191Bi, 194,195At, 198,199Fr; deduced possible levels, isomers, J, π. 198,199Rn, 192Bi(α); observed α spectra. 190,191Bi(β+), (EC); deduced EC+β+ branching ratio. Systematics of Eα for α transitions in A=190-212 At and Fr isotopes. Evidence of ground state deformation at N=112 in Fr isotopes.

NUCLEAR REACTIONS 141Pr(60Ni, X)198Rn/199Rn/198Fr/199Fr, E=268 MeV; measured production σ using RITU separator at JYFL facility.

doi: 10.1103/PhysRevC.87.064304
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2013VA10      Phys.Rev. C 87, 064303 (2013)

A.Vancraeyenest, C.M.Petrache, D.Guinet, P.T.Greenlees, U.Jakobsson, R.Julin, S.Juutinen, S.Ketelhut, M.Leino, M.Nyman, P.Peura, P.Rahkila, P.Ruotsalainen, J.Saren, C.Scholey, J.Sorri, J.Uusitalo, P.Jones, C.Ducoin, P.Lautesse, C.Mancuso, N.Redon, O.Stezowski, P.Desesquelles, R.Leguillon, A.Korichi, T.Zerrouki, D.Curien, A.Takashima

Identification of new transitions feeding the high-spin isomers in 139Nd and 140Nd nuclei

NUCLEAR REACTIONS 96Zr(48Ca, 4n), (48Ca, 5n), E=180 MeV; measured Eγ, Iγ, particle spectra, γγ-, (recoil)γ-coin, γγ(t), isomer half-lives using RITU separator, JUROGAM array, and GREAT spectrometer at JYFL facility. Recoil decay tagging technique. 139,140Nd; deduced high-spin levels, isomers, J, π, bands, multi-quasiparticle configurations. 136Ce, 138Nd; measured γ(t), half-lives of 10+ isomers.

doi: 10.1103/PhysRevC.87.064303
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2012AL26      J.Phys.:Conf.Ser. 381, 012126 (2012)

G.A.Alharshan, D.M.Cullen, M.J.Taylor, M.G.Procter, N.M.Lumley, T.Grahn, P.T.Greenless, K.Hauschild, A.Herzon, U.Jakobsson, P.M.Jones, R.Julin, S.Juutinen, S.Ketelhut, M.Leino, A.Lopez-Martens, P.Nieminen, J.Pantanen, P.Peura, P.Rahkila, S.Rinta-Antilla, P.Ruatsalainen, H.M.Sandzelius, J.Saren, C.Scholey, J.Sorri, S.Stolze, J.Uusitalo

The isomeric structure of 132Pr

NUCLEAR REACTIONS 98Mo(40Ar, n5p), E=150, 158, 165 MeV; measured prompt Eγ, Iγ using JUROGAM II, recoil gas-filled separator, β-delayed Eγ, Iγ(θ), γγ-coin, X-rays; deduced recoil isomer-tagged γ spectra, EC coefficient, new isomer, T1/2.

doi: 10.1088/1742-6596/381/1/012126
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2012GR12      Phys.Rev.Lett. 109, 012501 (2012)

P.T.Greenlees, J.Rubert, J.Piot, B.J.P.Gall, L.L.Andersson, M.Asai, Z.Asfari, D.M.Cox, F.Dechery, O.Dorvaux, T.Grahn, K.Hauschild, G.Henning, A.Herzan, R.-D.Herzberg, F.P.Hessberger, U.Jakobsson, P.Jones, R.Julin, S.Juutinen, S.Ketelhut, T.-L.Khoo, M.Leino, J.Ljungvall, A.Lopez-Martens, R.Lozeva, P.Nieminen, J.Pakarinen, P.Papadakis, E.Parr, P.Peura, P.Rahkila, S.Rinta-Antila, P.Ruotsalainen, M.Sandzelius, J.Saren, C.Scholey, D.Seweryniak, J.Sorri, B.Sulignano, Ch.Theisen, J.Uusitalo, M.Venhart

Shell-Structure and Pairing Interaction in Superheavy Nuclei: Rotational Properties of the Z=104 Nucleus 256Rf

NUCLEAR REACTIONS 208Pb(50Ti, 2n)256Rf, E=242 MeV; measured reaction products, Eγ, Iγ; deduced σ, T1/2, rotational band structure, energies, J, π, moments of inertia. Comparison with available data, systematics.

doi: 10.1103/PhysRevLett.109.012501
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2012HE09      Eur.Phys.J. A 48, 75 (2012)

F.P.Hessberger, S.Antalic, D.Ackermann, Z.Kalaninova, S.Heinz, S.Hofmann, B.Streicher, B.Kindler, I.Kojouharov, P.Kuusiniemi, M.Leino, B.Lommel, R.Mann, K.Nishio, S.Saro, B.Sulignano, M.Venhart

Alpha-gamma decay studies of 253No and its daughter products 253Md , 249Fm

RADIOACTIVITY 253No(α), (β+), (EC)[from 207Pb(48Ca, 2n)], 249Fm, 253Md(α)[from 253No]; measured Eα, Iα, Eγ, Iγ, αγ-coin, ER. 249Es, 249Fm, 253Md, 253No deduced levels, J, π, γ transitions, α branching ratios calculated α-decay spectrum using GEANT4. Compared with data.

doi: 10.1140/epja/i2012-12075-8
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2012HO12      Eur.Phys.J. A 48, 62 (2012)

S.Hofmann, S.Heinz, R.Mann, J.Maurer, J.Khuyagbaatar, D.Ackermann, S.Antalic, W.Barth, M.Block, H.G.Burkhard, V.F.Comas, L.Dahl, K.Eberhardt, J.Gostic, R.A.Henderson, J.A.Heredia, F.P.Hessberger, J.M.Kenneally, B.Kindler, I.Kojouharov, J.V.Kratz, R.Lang, M.Leino, B.Lommel, K.J.Moody, G.Munzenberg, S.L.Nelson, K.Nishio, A.G.Popeko, J.Runke, S.Saro, D.A.Shaughnessy, M.A.Stoyer, P.Thorle-Pospiech, K.Tinschert, N.Trautmann, J.Uusitalo, P.A.Wilk, A.V.Yeremin

The reaction 48Ca + 248Cm → 296116* studied at the GSI-SHIP

NUCLEAR REACTIONS 248Cm(48Ca, X)292Lv/293Lv, E=265.4, 270.2 MeV; measured reaction products, Eα, Iα(t) from 116 decay, 116 fission using SHIP velocity filter. 288,289Fl, 284,285Cn, 281Ds, 277Hs; deduced σ, T1/2, ground state quadrupole deformation, quasiparticle excitations, Q-values for different α decay chains. Comparison with other data.

doi: 10.1140/epja/i2012-12062-1
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2012JA01      Phys.Rev. C 85, 014309 (2012)

U.Jakobsson, J.Uusitalo, S.Juutinen, M.Leino, T.Enqvist, P.T.Greenlees, K.Hauschild, P.Jones, R.Julin, S.Ketelhut, P.Kuusiniemi, M.Nyman, P.Peura, P.Rahkila, P.Ruotsalainen, J.Saren, C.Scholey, J.Sorri

Recoil-decay tagging study of 205Fr

NUCLEAR REACTIONS 169Tm(40Ar, 4n), E=180 MeV; measured Eγ, Iγ, ce, delayed γ, γγ-, αγ-, γ(particle)-, ceγ-coin, γ(t), γ(θ), half-lives of isomers, recoil decay tagging method using JUROGAM array and GREAT spectrometer at JYFL. 205Fr; deduced levels, J, π, bands, isomers, configurations. Systematics of negative-parity states in odd-mass (N=118-126) francium nuclei and yrast and near-yrast positive-parity states in their even-mass (N=112-126) radon isotones.

RADIOACTIVITY 205Fr(IT)[from 169Tm(40Ar, 4n), E=180 MeV]; measured Eγ, Iγ, ce; deduced levels, J, π, isomer half-life. 200At, 204,205Fr(α); measured Eα, ce. 201At, 206Fr, 204,205,206Rn(α); measured Eα.

doi: 10.1103/PhysRevC.85.014309
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