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Search: Author = P.Papadakis

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2024YU02      Phys.Lett. B 849, 138452 (2024)

Z.Yue, A.N.Andreyev, A.E.Barzakh, I.N.Borzov, J.G.Cubiss, A.Algora, M.Au, M.Balogh, S.Bara, R.A.Bark, C.Bernerd, M.J.G.Borge, D.Brugnara, K.Chrysalidis, T.E.Cocolios, H.De Witte, Z.Favier, L.M.Fraile, H.O.U.Fynbo, A.Gottardo, R.Grzywacz, R.Heinke, A.Illana, P.M.Jones, D.S.Judson, A.Korgul, U.Koster, M.Labiche, L.Le, R.Lica, M.Madurga, N.Marginean, B.Marsh, C.Mihai, E.Nacher, C.Neacsu, C.Nita, B.Olaizola, J.N.Orce, C.A.A.Page, R.D.Page, J.Pakarinen, P.Papadakis, G.Penyazkov, A.Perea, M.Piersa-Silkowska, Zs.Podolyak, S.D.Prosnyak, E.Reis, S.Rothe, M.Sedlak, L.V.Skripnikov, C.Sotty, S.Stegemann, O.Tengblad, S.V.Tolokonnikov, J.M.Udias, P.Van Duppen, N.Warr, W.Wojtaczka

Magnetic moments of thallium isotopes in the vicinity of magic N=126

NUCLEAR MOMENTS ^207,209Tl; measured frequencies; deduced magnetic dipole moments. Comparison with the self-consistent theory of finite Fermi systems based on the energy density functional. The in-source laser resonance-ionization spectroscopy technique with the Laser Ion Source and Trap (LIST) at ISOLDE (CERN).

doi: 10.1016/j.physletb.2024.138452
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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, T_1/2, 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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2023CE04      Eur.Phys.J. A 59, 300 (2023)

E.A.Cederlof, T.Back, J.Nyberg, C.Qi, A.Atac, H.Badran, T.Braunroth, T.Calverley, D.M.Cox, M.Doncel, T.Grahn, P.Greenlees, J.Hilton, R.Julin, S.Juutinen, J.Konki, H.Li, S.Matta, V.Modamio, B.S.Nara Singh, J.Pakarinen, P.Papadakis, J.Partanen, P.Rahkila, P.Ruotsalainen, M.Sandzelius, J.Saren, C.Scholey, S.Stolze, P.Subramaniam, J.Uusitalo, J.J.Valiente-Dobon

Lifetime measurement of the yrast 2⁺ state in ¹¹⁸Te

NUCLEAR REACTIONS ¹⁰⁰Mo(²²Ne, 4n), E=75 MeV; measured reaction products, Eγ, Iγ; deduced γ-ray energies, J, π, level T_1/2, B(E2). Comparison with systematics, LSSM calculations. A Recoil Distance Doppler-shift (RDDS) experiment with the DPUNS plunger at the JYFL accelerator laboratory, the JUROGAM II γ-ray spectrometer.

doi: 10.1140/epja/s10050-023-01212-3
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2023CO04      Phys.Rev. C 107, L021301 (2023)

D.M.Cox, A.Saamark-Roth, D.Rudolph, L.G.Sarmiento, R.M.Clark, J.L.Egido, P.Golubev, J.Heery, A.Yakushev, S.AAberg, H.M.Albers, M.Albertsson, M.Block, H.Brand, T.Calverley, R.Cantemir, B.G.Carlsson, Ch.E.Dullmann, J.Eberth, C.Fahlander, U.Forsberg, J.M.Gates, F.Giacoppo, M.Gotz, S.Gotz, R.-D.Herzberg, Y.Hrabar, E.Jager, D.Judson, J.Khuyagbaatar, B.Kindler, I.Kojouharov, J.V.Kratz, J.Krier, N.Kurz, L.Lens, J.Ljungberg, B.Lommel, J.Louko, C.-C.Meyer, A.Mistry, C.Mokry, P.Papadakis, E.Parr, J.L.Pore, I.Ragnarsson, J.Runke, M.Schadel, H.Schaffner, B.Schausten, D.A.Shaughnessy, P.Thorle-Pospiech, N.Trautmann, J.Uusitalo

Spectroscopy along flerovium decay chains. II. Fine structure in odd-A ²⁸⁹Fl

RADIOACTIVITY ²⁸⁹Fl(α) [from ²⁴⁴Pu(⁴⁸Ca, X), E=6.02 MeV/nucleon]; ²⁸⁵Cn(α) [from ²⁸⁹Fl(α)]; ²⁸¹Ds(α) [from ²⁸⁵Cn(α)]; ²⁷⁷Hs(SF) [from ²⁸¹Ds(α)]; measured decay products, Eα, Iα, Eβ, Iβ αβ-coin, αα-coin, (fragment)αα-coin; deduced Q-values, T_1/2, branching ratios, hindrance factor. ²⁸⁹Fl, ²⁸⁵Cn, ²⁸¹Ds; deduced J, π and δ assignments based on the derived decay path. Comparison with structure calculations based on the symmetry-conserving configuration mixing theory. Gas-filled recoil separator TASCA was used to transmit, select, and focus the flerovium ions into an upgraded version of the TASISpec decay station consisting of implantation DSSD, veto DSSD and set of HPGe detectors (GSI).

doi: 10.1103/PhysRevC.107.L021301
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2023PE05      Eur.Phys.J. A 59, 44 (2023)

X.Pereira-Lopez, M.A.Bentley, R.Wadsworth, P.Ruotsalainen, S.M.Lenzi, U.Forsberg, K.Auranen, A.Blazhev, B.Cederwall, T.Grahn, P.Greenlees, A.Illana, D.G.Jenkins, R.Julin, H.Jutila, S.Juutinen, X.Liu, R.Llewelyn, M.Luoma, K.Moschner, C.Muller-Gatermann, B.S.Nara Singh, F.Nowacki, J.Ojala, J.Pakarinen, P.Papadakis, P.Rahkila, J.Romero, M.Sandzelius, J.Saren, H.Tann, S.Uthayakumaar, J.Uusitalo, J.G.Vega-Romero, J.M.Vilhena, R.Yajzey, W.Zhang, G.Zimba

In-beam γ-ray spectroscopy of ⁹⁴Ag

NUCLEAR REACTIONS ⁴⁰Ca(⁵⁸Ni, 3np)⁹⁴Ag, E=157-183 MeV; measured reaction products, Eγ, Iγ, γ-γ-coin, Eβ, Iβ; deduced γ-ray energies and relative intensities, T=0 and T=1 analog state transitions. Comparison with shell model calculations. A recoil-beta-tagging experiment using the MARA recoil separator and JUROGAM3 array at the Accelerator Laboratory of the University of Jyvaskyla.

doi: 10.1140/epja/s10050-023-00950-8
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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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2023SA03      Phys.Rev. C 107, 024301 (2023)

A.Saamark-Roth, D.M.Cox, D.Rudolph, L.G.Sarmiento, M.Albertsson, B.G.Carlsson, J.L.Egido, P.Golubev, J.Heery, A.Yakushev, S.AAberg, H.M.Albers, M.Block, H.Brand, T.Calverley, R.Cantemir, R.M.Clark, Ch.E.Dullmann, J.Eberth, C.Fahlander, U.Forsberg, J.M.Gates, F.Giacoppo, M.Gotz, S.Gotz, R.-D.Herzberg, Y.Hrabar, E.Jager, D.Judson, J.Khuyagbaatar, B.Kindler, I.Kojouharov, J.V.Kratz, J.Krier, N.Kurz, L.Lens, J.Ljungberg, B.Lommel, J.Louko, C.-C.Meyer, A.Mistry, C.Mokry, P.Papadakis, E.Parr, J.L.Pore, I.Ragnarsson, J.Runke, M.Schadel, H.Schaffner, B.Schausten, D.A.Shaughnessy, P.Thorle-Pospiech, N.Trautmann, J.Uusitalo

Spectroscopy along flerovium decay chains. III. Details on experiment, analysis, ²⁸²Cn, and spontaneous fission branches

RADIOACTIVITY ^{290,288,286,284}Fl(α)(SF) [from ²⁴⁴Pu(⁴⁸Ca, X), E=6.02 MeV/nucleon]; ²⁸²Cn(α)(SF) [²⁸⁶Fl(α)]; ²⁸⁴Cn(α)(SF) [from ²⁸⁸Fl(α)]; ²⁸⁶Cn(α)(SF) [²⁹⁰Fl(α)]; ²⁸²Ds(α)(SF) [from ²⁸⁶Cn(α)]; ²⁸⁰Ds(α)(SF) [from ²⁸⁴Cn(α)]; measured decay products, Eα, Iα, Eβ, Iβ αβ-coin, αα-coin, (fragment)αα-coin; deduced Q-values, T_1/2, branching ratios, hindrance factor. ²⁸²Cn; deduced levels, J, π, T_1/2 of excited states, transition rates, monopole transition strengths. Comparison to macroscopic-microscopic finite-range liquid-drop model, self-consistent Hartree-Fock-Bogoliubov calculations and other experimental data. Gas-filled recoil separator TASCA was used to transmit, select, and focus the flerovium ions into an upgraded version of the TASISpec decay station consisting of implantation DSSD, veto DSSD and set of HPGe detectors (GSI).

doi: 10.1103/PhysRevC.107.024301
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2023SA36      Phys.Lett. B 845, 138114 (2023)

J.Saiz-Lomas, M.Petri, I.Y.Lee, I.Syndikus, S.Heil, J.M.Allmond, L.P.Gaffney, J.Pakarinen, H.Badran, T.Calverley, D.M.Cox, U.Forsberg, T.Grahn, P.Greenlees, K.Hadynska-Klek, J.Hilton, M.Jenkinson, R.Julin, J.Konki, A.O.Macchiavelli, M.Mathy, J.Ojala, P.Papadakis, J.Partanen, P.Rahkila, P.Ruotsalainen, M.Sandzelius, J.Saren, S.Stolze, J.Uusitalo, R.Wadsworth

The spectroscopic quadrupole moment of the 2⁺₁ state of ¹²C: A benchmark of theoretical models

NUCLEAR REACTIONS ²⁰⁸Pb(¹²C, ¹²C'), E=47.65 MeV; measured reaction products, Eγ, Iγ. ¹²C; deduced γ-ray energies, quadrupole moments, B(E2). Comparison with state-of-the-art shell-model, mean-field, ab initio calculations, cluster-based and geometrical-like theories, which show varying degrees of emergent quadrupole collectivity. The jurogam array, JYFL accelerator laboratory at the University of Jyvaskyla, Finland.

doi: 10.1016/j.physletb.2023.138114
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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, 172}Os and ^{171, 172, 174}Ir

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 νi_13/2 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,174,174m}Ir(α);^171mOs(IT)[from ⁹²Mo(⁸³Kr, X), E=383 MeV]; measured Eα, Iα, Eγ, Iγ, x-rays, αγ-coin; deduced T_1/2, 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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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, T_1/2 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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2022LV01      Phys.Lett. B 824, 136840 (2022)

B.F.Lv, C.M.Petrache, E.A.Lawrie, S.Guo, A.Astier, K.K.Zheng, H.J.Ong, J.G.Wang, X.H.Zhou, Z.Y.Sun, P.T.Greenlees, H.Badran, T.Calverley, D.M.Cox, T.Grahn, J.Hilton, R.Julin, S.Juutinen, J.Konki, J.Pakarinen, P.Papadakis, J.Partanen, P.Rahkila, P.Ruotsalainen, M.Sandzelius, J.Saren, C.Scholey, J.Sorri, S.Stolze, J.Uusitalo, B.Cederwall, A.Ertoprak, H.Liu, I.Kuti, J.Timar, A.Tucholski, J.Srebrny, C.Andreoiu

Evidence against the wobbling nature of low-spin bands in ¹³⁵Pr

NUCLEAR REACTIONS ¹⁰⁰Mo(⁴⁰Ar, 4np), E=152 MeV; measured reaction products, Eγ, Iγ, γ-γ-γ-coin.; deduced γ-ray energies and intensities, J, π, level scheme, negative-parity bands, angular correlations, phonon wobbling bands. Quasiparticle-plus-triaxial-rotor model calculations.

doi: 10.1016/j.physletb.2021.136840
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2022LV02      Phys.Rev. C 105, 034302 (2022)

B.F.Lv, C.M.Petrache, R.Budaca, A.Astier, K.K.Zheng, P.Greenlees, H.Badran, T.Calverley, D.M.Cox, T.Grahn, J.Hilton, R.Julin, S.Juutinen, J.Konki, J.Pakarinen, P.Papadakis, J.Partanen, P.Rahkila, P.Ruotsalainen, M.Sandzelius, J.Saren, C.Scholey, J.Sorri, S.Stolze, J.Uusitalo, B.Cederwall, A.Ertoprak, H.Liu, S.Guo, J.G.Wang, H.J.Ong, X.H.Zhou, Z.Y.Sun, I.Kuti, J.Timar, A.Tucholski, J.Srebrny, C.Andreoiu

Experimental evidence for transverse wobbling bands in ¹³⁶Nd

NUCLEAR REACTIONS ¹⁰⁰Mo(⁴⁰Ar, 4n)¹³⁶Nd, E=152 MeV; analyzed γ-ray measurements reported in their previous articles: 2018Pe07, 2018Lv01, 2019Pe21 and 2020Pe07 (Phys. Rev. C 97, 041304(R); ibid 98, 044304; 100, 054319; 102, 014311). ¹³⁶Nd; deduced levels, J, π, γ-ray asymmetry ratios for 751- and 781-keV γ rays, linear polarization for 751-keV γ ray, multipolarity, B(M1)/B(E2) and B(E2)/B(E2) ratios, transverse one-phonon and zero-phonon wobbling-mode bands, and configurations. Comparison with theoretical calculations using a new particle-rotor model coupling the total angular momentum of two quasiparticles to a triaxial core in an orthogonal geometry.

doi: 10.1103/PhysRevC.105.034302
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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 T_1/2 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). ^{174,175,176,177,178}Pt, ^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 T_1/2. 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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2021LV01      Phys.Rev. C 103, 044308 (2021)

B.F.Lv, C.M.Petrache, E.A.Lawrie, A.Astier, E.Dupont, K.K.Zheng, P.Greenlees, H.Badran, T.Calverley, D.M.Cox, T.Grahn, J.Hilton, R.Julin, S.Juutinen, J.Konki, J.Pakarinen, P.Papadakis, J.Partanen, P.Rahkila, P.Ruotsalainen, M.Sandzelius, J.Saren, C.Scholey, J.Sorri, S.Stolze, J.Uusitalo, B.Cederwall, A.Ertoprak, H.Liu, S.Guo, J.G.Wang, H.J.Ong, X.H.Zhou, Z.Y.Sun, I.Kuti, J.Timar, A.Tucholski, J.Srebrny, C.Andreoiu

Tilted precession bands in ¹³⁵Nd

NUCLEAR REACTIONS ¹⁰⁰Mo(⁴⁰Ar, 5n)¹³⁵Nd, E=152 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ)(DCO), γγ(two-angle, anisotropy ratio), γ(θ), γγ(linear polarization) using JUROGAM II spectrometer with 39 Compton-suppressed Ge detectors at the K130 Cyclotron facility of the University of Jyvaskyla. ¹³⁵Nd; deduced high-spin levels, J, π, rotational bands, multipolarities, mixing ratios, B(M1)_out/B(E2)_in and B(E2)_out/B(E2)_in ratios, configurations. Comparison with quasiparticle-plus-triaxial-rotor model calculations. Observed bands described as tilted precession (TiP) bands instead of wobbling bands. Discussed nuclear triaxiality, and similarities and differences between tilted precession bands (TiP) and wobbling bands.

doi: 10.1103/PhysRevC.103.044308
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2021SA01      Phys.Rev.Lett. 126, 032503 (2021)

A.Samark-Roth, D.M.Cox, D.Rudolph, L.G.Sarmiento, B.G.Carlsson, J.L.Egido, P.Golubev, J.Heery, A.Yakushev, S.Aberg, H.M.Albers, M.Albertsson, M.Block, H.Brand, T.Calverley, R.Cantemir, R.M.Clark, C.E.Dullmann, J.Eberth, C.Fahlander, U.Forsberg, J.M.Gates, F.Giacoppo, M.Gotz, S.Gotz, R.-D.Herzberg, Y.Hrabar, E.Jager, D.Judson, J.Khuyagbaatar, B.Kindler, I.Kojouharov, J.V.Kratz, J.Krier, N.Kurz, L.Lens, J.Ljungberg, B.Lommel, J.Louko, C.-C.Meyer, A.Mistry, C.Mokry, P.Papadakis, E.Parr, J.L.Pore, I.Ragnarsson, J.Runke, M.Schadel, H.Schaffner, B.Schausten, D.A.Shaughnessy, P.Thorle-Pospiech, N.Trautmann, J.Uusitalo

Spectroscopy along Flerovium Decay Chains: Discovery of ²⁸⁰Ds and an Excited State in ²⁸²Cn

RADIOACTIVITY ^286,288Fl, ²⁸⁴Cn(α), ²⁸²Cn, ²⁸⁰Ds(SF) [from ^242,244Pu(⁴⁸Ca, X)²⁸⁶Fl/²⁸⁸Fl, E=6.021 MeV/nucleon]; measured decay products, Eα, Iα, Eβ, Iβ α-β coin.; deduced Q-values, T_1/2, J, π. Comparison with theoretical calculations. The gas-filled separator TASCA at the GSI.

doi: 10.1103/PhysRevLett.126.032503
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2021ZH52      Phys.Lett. B 820, 136527 (2021)

W.Zhang, B.Cederwall, M.Doncel, O.Aktas, A.Ertoprak, R.Liotta, C.Qi, T.Grahn, B.S.Nara Singh, D.M.Cullen, D.Hodge, M.Giles, S.Stolze, 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, 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

Lifetime measurements of excited states in ^{169, 171, 173}Os: Persistence of anomalous B(E2) ratios in transitional rare earth nuclei in the presence of a decoupled i_13/2 valence neutron

NUCLEAR REACTIONS ⁹²Mo(⁸³Kr, X)¹⁶⁹Os/¹⁷¹Os/¹⁷³Os, E=383 MeV; measured reaction products, Eγ, Iγ; deduced γ-ray energies, J, π, level lifetimes, B(E2). Recoil-distance Doppler shift and recoil-isomer tagging techniques.

doi: 10.1016/j.physletb.2021.136527
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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)-α₁-α₂-α₃-α₄ 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,198}Po, ^{197,198,198m,200}At, ^{200,201,204,205,206}Rn, ^{201,206,207,208,209}Fr, ^{207,208,209,210}Ra, ^{210,211,212,213}Ac; 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, 251}Md

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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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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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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2020KH11      Phys.Rev. C 102, 064602 (2020)

J.Khuyagbaatar, A.Yakushev, Ch.E.Dullmann, D.Ackermann, L.-L.Andersson, M.Asai, M.Block, R.A.Boll, H.Brand, D.M.Cox, M.Dasgupta, X.Derkx, A.Di Nitto, K.Eberhardt, J.Even, M.Evers, C.Fahlander, U.Forsberg, J.M.Gates, N.Gharibyan, P.Golubev, K.E.Gregorich, J.H.Hamilton, W.Hartmann, R.-D.Herzberg, F.P.Hessberger, D.J.Hinde, J.Hoffmann, R.Hollinger, A.Hubner, E.Jager, B.Kindler, J.V.Kratz, J.Krier, N.Kurz, M.Laatiaoui, S.Lahiri, R.Lang, B.Lommel, M.Maiti, K.Miernik, S.Minami, A.K.Mistry, C.Mokry, H.Nitsche, J.P.Omtvedt, G.K.Pang, P.Papadakis, D.Renisch, J.B.Roberto, D.Rudolph, J.Runke, K.P.Rykaczewski, L.G.Sarmiento, M.Schadel, B.Schausten, A.Semchenkov, D.A.Shaughnessy, P.Steinegger, J.Steiner, E.E.Tereshatov, P.Thorle-Pospiech, K.Tinschert, T.Torres De Heidenreich, N.Trautmann, A.Turler, J.Uusitalo, M.Wegrzecki, N.Wiehl, S.M.Van Cleve, V.Yakusheva

Search for elements 119 and 120

NUCLEAR REACTIONS ²⁴⁹Bk, ²⁴⁹Cf(⁵⁰Ti, X)²⁹⁹119^*/²⁹⁹120^*, E(average)=281.5 MeV; measured evaporation residues (ERs), Eα, correlated ER-α and ER-α₁-α₂-SF events using UNILAC accelerator, TASCA separator, and Focal plane detector system (FPDS) consisting of double-sided silicon strip (DSSD) detectors, and Si-strip detectors for position and time correlations of events. ^295,296119, ^295,296120; deduced no evidence for non-random correlated events related to 3n- or 4n-channel deexcitations of the compound nuclei ²⁹⁹119 and ²⁹⁹120, within a sensitivity limit of one event corresponding to σ=65 fb for ²⁴⁹Bk+⁵⁰Ti reaction and σ=200 fb for ²⁴⁹Cf+⁵⁰Ti; discussed nonobservation of Z=119 and 120 superheavy elements within the context of the fusion-evaporation reaction mechanism.

doi: 10.1103/PhysRevC.102.064602
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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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2020PA20      Eur.Phys.J. A 56, 149 (2020)

J.Pakarinen, J.Ojala, P.Ruotsalainen, H.Tann, H.Badran, T.Calverley, J.Hilton, T.Grahn, P.T.Greenlees, M.Hytonen, A.Illana, A.Kauppinen, M.Luoma, P.Papadakis, J.Partanen, K.Porras, M.Puskala, P.Rahkila, K.Ranttila, J.Saren, M.Sandzelius, S.Szwec, J.Tuunanen, J.Uusitalo, G.Zimba

The jurogam 3 spectrometer

doi: 10.1140/epja/s10050-020-00144-6
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2020PA44      Phys.Rev. C 102, 054335 (2020)

E.Parr, J.F.Smith, P.T.Greenlees, 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, C.McPeake, D.Mengoni, A.K.Mistry, K.F.Mulholland, 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, S.Stolze, M.J.Taylor, J.Uusitalo

Excited states in ²¹⁷Ra populated in the α decay of ²²¹Th

RADIOACTIVITY ²²¹Th(α)[from ²⁰⁸Pb(¹⁸O, 5n), E=95 MeV at the University of Jyvaskyla Accelerator Laboratory]; measured Eα, Iα, Eγ, Iγ, αγ- and γγ-coin, ce, x rays, half-life of ²²¹Th decay using SAGE and GREAT spectrometers, the latter consisting of double-sided silicon-strip detectors (DSSDs), PIN-diode detectors, and Clover HPGe detectors. ²¹⁷Ra; deduced levels, J, π, conversion coefficients, multipolarities, α-branching ratios, α-hindrance factors, configurations. Comparison with previous experimental results, and with predictions of spherical shell and reflection-asymmetric models. Systematics of low-energy states in odd-A, N=129 isotones: ²¹¹Pb, ²¹³Po, ²¹⁵Rn, ²¹⁷Ra and ²¹⁹Th.

doi: 10.1103/PhysRevC.102.054335
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2020PE07      Phys.Rev. C 102, 014311 (2020)

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

Signatures of enhanced octupole correlations at high spin in ¹³⁶Nd

NUCLEAR REACTIONS ¹⁰⁰Mo(⁴⁰Ar, 4n), E=152 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ)(DCO) using the JUROGAM II array at the University of Jyvaskyla. Enriched target. ¹³⁶Nd; deduced high-spin levels, J, π, multipolarities, bands, B(E1)/B(E2) ratios, electric dipole moments D₀, configurations, alignments, enhanced octupole correlations at high spins. Comparison with cranked quasiparticle random phase approximation (QRPA) calculations, and with quadrupole-octupole rotations model (QORM).

doi: 10.1103/PhysRevC.102.014311
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2020PE10      Eur.Phys.J. A 56, 208 (2020)

C.M.Petrache, B.F.Lv, Q.B.Chen, J.Meng, A.Astier, E.Dupont, K.K.Zheng, P.T.Greenlees, H.Badran, T.Calverley, D.M.Cox, T.Grahn, J.Hilton, R.Julin, S.Juutinen, J.Konki, J.Pakarinen, P.Papadakis, J.Partanen, P.Rahkila, P.Ruotsalainen, M.Sandzelius, J.Saren, C.Scholey, J.Sorri, S.Stolze, J.Uusitalo, B.Cederwall, A.Ertoprak, H.Liu, S.Guo, J.G.Wang, X.H.Zhou, I.Kuti, J.Timar, A.Tucholski, J.Srebrny, C.Andreoiu

Multiple chiral bands in ¹³⁷Nd

NUCLEAR REACTIONS ¹⁰⁰Mo(⁴⁰Ar, 3n), E=152 MeV; measured reaction products, Eγ, Iγ, γ-γ-coin.; deduced γ-ray energies and intensities, B(M1)/B(E2), quasi-particle alignments for the chiral rotational bands, angular momenta. Comparison with theoretical calculations.

doi: 10.1140/epja/s10050-020-00218-5
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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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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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2019GI19      Nucl.Instrum.Methods Phys.Res. A923, 139 (2019)

M.M.Giles, D.M.Cullen, L.Barber, B.S.Nara Singh, M.J.Taylor, A.J.Smith, A.McFarlane, C.Read, T.Grahn, H.Badran, P.T.Greenlees, R.Julin, J.Pakarinen, J.Partanen, P.Rahkila, P.Ruotsalainen, M.Sandzelius, J.Saren, J.Sorri, S.V.Szwec, J.Uusitalo, J.Heery, E.Parr, P.Papadakis, R.D.Herzberg

TPEN: A Triple-foil differential Plunger for lifetime measurements of excited states in Exotic Nuclei

NUCLEAR REACTIONS ²⁴Mg(¹³⁶Xe, 4n), E=590 MeV; measured reaction products, Eγ, Iγ; deduced γ-ray energies and relative intensities, 4⁺ state T_1/2. Comparison with available data. The Recoil Distance Doppler-Shift method (RDDS), the Differential Decay Curve Method (DDCM) analysis technique within the RDDS method. A Triple-foil differential Plunger for Exotic Nuclei (TPEN), the K130 cyclotron, the Accelerator Laboratory of the University of Jyvaskyla, Finland.

doi: 10.1016/j.nima.2019.01.089
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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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2019KH04      Phys.Rev. C 99, 054306 (2019)

J.Khuyagbaatar, A.Yakushev, Ch.E.Dullmann, D.Ackermann, L.-L.Andersson, M.Asai, M.Block, R.A.Boll, H.Brand, D.M.Cox, M.Dasgupta, X.Derkx, A.Di Nitto, K.Eberhardt, J.Even, M.Evers, C.Fahlander, U.Forsberg, J.M.Gates, N.Gharibyan, P.Golubev, K.E.Gregorich, J.H.Hamilton, W.Hartmann, R.-D.Herzberg, F.P.Hessberger, D.J.Hinde, J.Hoffmann, R.Hollinger, A.Hubner, E.Jager, B.Kindler, J.V.Kratz, J.Krier, N.Kurz, M.Laatiaoui, S.Lahiri, R.Lang, B.Lommel, M.Maiti, K.Miernik, S.Minami, A.Mistry, C.Mokry, H.Nitsche, J.P.Omtvedt, G.K.Pang, P.Papadakis, D.Renisch, J.Roberto, D.Rudolph, J.Runke, K.P.Rykaczewski, L.G.Sarmiento, M.Schadel, B.Schausten, A.Semchenkov, D.A.Shaughnessy, P.Steinegger, J.Steiner, E.E.Tereshatov, P.Thorle-Pospiech, K.Tinschert, T.Torres De Heidenreich, N.Trautmann, A.Turler, J.Uusitalo, D.E.Ward, M.Wegrzecki, N.Wiehl, S.M.Van Cleve, V.Yakusheva

Fusion reaction ⁴⁸Ca + ²⁴⁹Bk leading to formation of the element Ts (Z=117)

NUCLEAR REACTIONS ²⁴⁹Bk(⁴⁸Ca, 3n), (⁴⁸Ca, 4n)²⁹³Ts/²⁹⁴Ts, E=252.1, 254.0, 258.0 MeV; measured reaction products, evaporation residues (ER), Eα, Iα, (ER)α-correlated decay chains, and σ using double-sided silicon strip detectors for α detection, TASCA separator for evaporation residue, and multiwire proportional counter for detection of residues at UNILAC accelerator facility of GSI. Comparison with previous experimental data for (ER)α-correlated decay chains from DGFRS-Dubna facility.

RADIOACTIVITY ²⁹⁴Ts, ²⁹⁰Mc, ²⁸⁶Nh, ²⁸²Rg, ²⁷⁸Mt, ²⁷⁴Bh, ²⁷⁰Db(α); ²⁹³Ts, ²⁸⁹Mc, ²⁸⁵Nh, ²⁸¹Rg(α); ²⁶⁶Lr, ²⁷⁰Db, ²⁷⁷Mt, ²⁷⁷Hs(SF); measured Eα, Iα, SF events, half-lives. ²⁶⁶Lr, ²⁷⁰Db(α), (SF); measured half-lives and α/SF branching ratios. Comparison with previous experimental data for (ER)α-correlated decay chains from DGFRS-Dubna facility. A=200-240; A=240-260; systematics of α-decay half-lives of isotopes produced in ⁴⁸Ca+²⁴⁹Bk and ⁴⁸Ca+²⁴⁹Cf reactions.

doi: 10.1103/PhysRevC.99.054306
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2019LV01      Phys.Rev. C 100, 024314 (2019), Erratum Phys.Rev. C 103, 019901 (2021)

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

Chirality of ¹³⁵Nd reexamined: Evidence for multiple chiral doublet bands

NUCLEAR REACTIONS ¹⁰⁰Mo(⁴⁰Ar, 5n), E=152 MeV from the K130 cyclotron at the University of Jyvaskyla; measured Eγ, Iγ, γγ-coin, γγ(θ)(DCO), angular distribution ratios using the JUROGAM-II array, with 39 Compton-suppressed Ge detectors. ¹³⁵Nd; deduced high-spin levels, J, π, multipolarities, rotational and two sets of chiral-doublet bands, alignments, B(M1)/B(E2) ratios, configurations. Comparison with constrained density functional theory (CDFT) and particle-rotor model (PRM) calculations.

doi: 10.1103/PhysRevC.100.024314
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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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2019PE08      Phys.Rev. C 99, 041301 (2019)

C.M.Petrache, S.Frauendorf, B.F.Lv, A.Astier, E.Dupont, S.Guo, M.L.Liu, X.H.Zhou, K.L.Wang, P.T.Greenlees, H.Badran, D.M.Cox, T.Grahn, R.Julin, S.Juutinen, J.Konki, J.Pakarinen, P.Papadakis, J.Partanen, P.Rahkila, M.Sandzelius, J.Saren, C.Scholey, J.Sorri, S.Stolze, J.Uusitalo, B.Cederwall, O.Aktas, A.Ertoprak, H.Liu, I.Kuti, J.Timar, A.Tucholski, J.Srebrny, C.Andreoiu

Collective rotation of an oblate nucleus at very high spin

NUCLEAR REACTIONS ¹⁰⁰Mo(⁴⁰Ar, X), E=152 MeV; measured Eγ, Iγ, γγ-coin using the JUROGAM II array at the University of Jyvaskyla. ¹³⁷Nd; deduced levels, J, π, extremely regular rotational band, highly-deformed band and a triaxial band, antimagnetic rotational band, alignments; calculated deformation trajectories, potential energy surfaces, and single particle Routhians for different bands using Cranked mean-field calculations of the Nilsson-Strutinsky type.

doi: 10.1103/PhysRevC.99.041301
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2019PE21      Phys.Rev. C 100, 054319 (2019)

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

Highly deformed bands in Nd nuclei: New results and consistent interpretation within the cranked Nilsson-Strutinsky formalism

NUCLEAR REACTIONS ¹⁰⁰Mo(⁴⁰Ar, 4n), (⁴⁰Ar, 3n), E=152 MeV; measured Eγ, Iγ, γγ-coin using the JUROGAM II array at the K130 Cyclotron at the University of Jyvaskyla. ^136,137Nd; deduced high-spin levels, J, π, highly-deformed rotational bands, configurations; calculated single-particle neutron Routhians. Comparison with extended cranked Nilsson-Strutinsky (CNS) calculations.

doi: 10.1103/PhysRevC.100.054319
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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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2018CE02      Phys.Rev.Lett. 121, 022502 (2018)

B.Cederwall, M.Doncel, O.Aktas, A.Ertoprak, R.Liotta, C.Qi, T.Grahn, D.M.Cullen, D.Hodge, M.Giles, S.Stolze, 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, H.Li, H.Liu, S.Matta, V.Modamio, J.Pakarinen, P.Papadakis, J.Partanen, C.M.Petrache, P.Rahkila, P.Ruotsalainen, M.Sandzelius, J.Saren, C.Scholey, J.Sorri, P.Subramaniam, M.J.Taylor, J.Uusitalo, J.J.Valiente-Dobon

Lifetime Measurements of Excited States in ¹⁷²Pt and the Variation of Quadrupole Transition Strength with Angular Momentum

NUCLEAR REACTIONS ⁹²Mo(⁸³Kr, 3n)¹⁷²Pt, E=383 MeV; measured reaction products, Eγ, Iγ; deduced γ-ray energies, 2⁺ and 4⁺ lifetimes, B(E2). Comparison with systematics, Alaga rule.

doi: 10.1103/physrevlett.121.022502
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2018GI11      Phys.Rev. C 98, 044315 (2018)

M.M.Giles, D.M.Cullen, B.S.Nara Singh, D.Hodge, M.J.Taylor, M.J.Mallaburn, N.V.Sosnin, L.Barber, J.F.Smith, L.Capponi, M.Smolen, C.Scholey, P.Rahkila, T.Grahn, H.Badran, A.Girka, P.T.Greenlees, R.Julin, J.Konki, O.Nefodov, P.Ruotsalainen, M.Sandzelius, J.Saren, J.Sorri, S.Stolze, J.Uusitalo, J.Pakarinen, P.Papadakis, J.Partanen, T.Braunroth, G.G.O'Neill

Lifetime measurements of lowest states in the in the νg_7/2 (X) νh_11/2 rotational band in ¹¹²I

NUCLEAR REACTIONS ⁵⁸Ni(⁵⁸Ni, n3p), E=230 MeV; measured recoils, Eγ, Iγ, γγ-coin, level half-lives using a differential plunger device, and differential decay curve analysis using RITU for recoil separation, JUROGAM-II array for γ detection, and double-sided silicon strip detector for recoils at the K130 cyclotron facility of the University of Jyvaskyla. ¹¹²I; deduced high-spin levels, J, π, alignments, configurations. Comparison with previous experimental values.

doi: 10.1103/PhysRevC.98.044315
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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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2018PA15      Eur.Phys.J. A 54, 42 (2018)

P.Papadakis, D.M.Cox, G.G.O'Neill, M.J.G.Borge, P.A.Butler, L.P.Gaffney, P.T.Greenlees, R.-D.Herzberg, A.Illana, D.T.Joss, J.Konki, T.Kroll, J.Ojala, R.D.Page, P.Rahkila, K.Ranttila, J.Thornhill, J.Tuunanen, P.Van Duppen, N.Warr, J.Pakarinen

The SPEDE spectrometer

doi: 10.1140/epja/i2018-12474-9
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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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2018PE07      Phys.Rev. C 97, 041304 (2018)

C.M.Petrache, B.F.Lv, A.Astier, E.Dupont, Y.K.Wang, S.Q.Zhang, P.W.Zhao, Z.X.Ren, J.Meng, P.T.Greenlees, H.Badran, D.M.Cox, T.Grahn, R.Julin, S.Juutinen, J.Konki, J.Pakarinen, P.Papadakis, J.Partanen, P.Rahkila, M.Sandzelius, J.Saren, C.Scholey, J.Sorri, S.Stolze, J.Uusitalo, B.Cederwall, O.Aktas, A.Ertoprak, H.Liu, S.Matta, P.Subramaniam, S.Guo, M.L.Liu, X.H.Zhou, K.L.Wang, I.Kuti, J.Timar, A.Tucholski, J.Srebrny, C.Andreoiu

Evidence of chiral bands in even-even nuclei

NUCLEAR REACTIONS ¹⁰⁰Mo(⁴⁰Ar, 4n), E=152 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ)(DCO) using JUROGAM II array at the K130 Cyclotron facility of the University of Jyvaskyla. ¹³⁶Nd; deduced high-spin levels, J, π, bands, five pairs of nearly degenerate chiral doublet bands, B(M1)/B(E2), configurations, quasiparticle alignments. Comparison with theoretical calculations using three-dimensional tilted axis cranking covariant density functional theory (3D TAC-CDFT), TAC-CDFT, and multi-quasiparticle particle-rotor model (MQ-PRM). Complete level scheme and bands to appear in a forthcoming paper.

doi: 10.1103/PhysRevC.97.041304
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2018SA45      Phys.Rev. C 98, 044307 (2018)

A.Saamark-Roth, L.G.Sarmiento, D.Rudolph, J.Ljungberg, B.G.Carlsson, C.Fahlander, U.Forsberg, P.Golubev, I.Ragnarsson, D.Ackermann, L.-L.Andersson, M.Block, H.Brand, D.M.Cox, A.Di Nitto, Ch.E.Dullmann, K.Eberhardt, J.Even, J.M.Gates, J.Gerl, K.E.Gregorich, C.J.Gross, R.-D.Herzberg, F.P.Hessberger, E.Jager, J.Khuyagbaatar, B.Kindler, I.Kojouharov, J.V.Kratz, J.Krier, N.Kurz, B.Lommel, A.Mistry, C.Mokry, J.P.Omtvedt, P.Papadakis, J.Runke, K.Rykaczewski, M.Schadel, H.Schaffner, B.Schausten, P.Thorle-Pospiech, N.Trautmann, T.Torres, A.Turler, A.Ward, N.Wiehl, A.Yakushev

Low-lying states in ²¹⁹Ra and ²¹⁵Rn: Sampling microsecond α-decaying nuclei

RADIOACTIVITY ²¹⁹Ra(α)[from ²⁴³Am(⁴⁸Ca, X), E=242.1, 245.0 MeV]; measured Eα, Iα, Eγ, Iγ, αγ-coin, α(x ray)-coin, α-α correlations using TASISpec at the TASCA, GSI facility. Pileup analysis and GEANT4 simulation of ²¹⁹Ra to ²¹⁵Rn decay. ^{219,219m,220,221}Ra, ^215,216,217Rn, ^212,213Po, ²¹⁹Fr, ²¹⁵At(α); measured half-lives, Qα. ²¹⁹Ra, ²¹⁵Rn; deduced levels, J, π, isomer in ²¹⁹Ra Comparison with shell model calculations and theoretical calculations of deformation, rotational states and α-decay rates, and with evaluated data in the ENSDF database.

doi: 10.1103/PhysRevC.98.044307
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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, 203}At

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 ^{195,197,199,201,203}At, ¹⁹⁸Rn, ¹⁹⁶Po, ^191,193Bi isotopes.

RADIOACTIVITY ¹⁹³Bi, ^{196,197,197m,198,202}Po, ^{196,197,197m,198,202,203,204}At(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+ (νi_13/2) 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 ^{177,179,181,183,185,187,189,191,193,195,197,199,201}Tl. ^178,179Au, ^174,176Pt, ^{176,177,178,179,180}Hg(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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2017CO05      Acta Phys.Pol. B48, 403 (2017)

D.M.Cox, J.Pakarinen, P.Papadakis, P.A.Butler, P.T.Greenlees, J.Konki, R.-D.Herzberg, G.G.O'Neill, P.Rahkila

Commissioning of the SPEDE Spectrometer with Stable Beams

doi: 10.5506/APhysPolB.48.403
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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 T_1/2, branching ratios, electron-capture delayed fission (ECDF) probability. Comparison with available data.

doi: 10.1016/j.physletb.2016.11.038
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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 T_1/2, ICC, B(M1)/B(E2), dynamic model of inertia.

doi: 10.1140/epja/i2017-12215-8
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2017NE05      J.Phys.(London) G44, 065103 (2017)

D.A.Nesterenko, A.Kankainen, L.Canete, M.Block, D.Cox, T.Eronen, C.Fahlander, U.Forsberg, J.Gerl, P.Golubev, J.Hakala, A.Jokinen, V.S.Kolhinen, J.Koponen, N.Lalovic, C.Lorenz, I.D.Moore, P.Papadakis, J.Reinikainen, S.Rinta-Antila, D.Rudolph, L.G.Sarmiento, A.Voss, J.Aysto

High-precision mass measurements for the isobaric multiplet mass equation at A = 52

ATOMIC MASSES ⁵²Co, ^52mCo, ⁵²Fe, ^52mFe, ⁵²Mn; measured time-of-flight ion cyclotron resonance spectrum, average cyclotron frequency ratios; deduced mass-excess values. Comparison with Nubase2012 mass values.

doi: 10.1088/1361-6471/aa67ae
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2017PA12      J.Phys.(London) G44, 064009 (2017)

J.Pakarinen, T.Grahn, L.P.Gaffney, A.Algora, C.Bauer, A.Blazhev, N.Bree, T.E.Cocolios, H.De Witte, J.Diriken, P.Fernier, K.Hadynska-Klek, A.Herzan, M.Huyse, J.Iwanicki, U.Jakobsson, D.Jenkins, N.Kesteloot, J.Konki, B.Lannoo, P.Papadakis, P.Peura, P.Rahkila, G.Rainovski, E.Rapisarda, P.Reiter, S.Sambi, M.Scheck, B.Seibeck, M.Seidlitz, T.Stora, P.Van Duppen, N.Warr, F.Wenander, M.J.Vermeulen, D.Voulot, K.Wrzosek-Lipska, M.Zielinska

Collectivity in ^{196, 198}Pb isotopes probed in Coulomb-excitation experiments at REX-ISOLDE

NUCLEAR REACTIONS ¹¹²Cd(¹⁹⁶Pb, ¹⁹⁶Pb'), (¹⁹⁸Pb, ¹⁹⁸Pb'), E=2.82 MeV/nucleon; measured reaction products, Eγ, Iγ. ^196,198Pb; deduced γ-ray energies, J, π, quadrupole moments, B(E2). GOSIA2 code simultaneous treatment both target and beam excitations, comparison with available data.

doi: 10.1088/1361-6471/aa6753
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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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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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2016FO10      Nucl.Phys. A953, 117 (2016)

U.Forsberg, D.Rudolph, L.-L.Andersson, A.Di Nitto, Ch.E.Dullmann, C.Fahlander, J.M.Gates, P.Golubev, K.E.Gregorich, C.J.Gross, R.-D.Herzberg, F.P.Hessberger, J.Khuyagbaatar, J.V.Kratz, K.Rykaczewski, L.G.Sarmiento, M.Schadel, A.Yakushev, S.Aberg, D.Ackermann, M.Block, H.Brand, B.G.Carlsson, D.Cox, X.Derkx, J.Dobaczewski, K.Eberhardt, J.Even, J.Gerl, E.Jager, B.Kindler, J.Krier, I.Kojouharov, N.Kurz, B.Lommel, A.Mistry, C.Mokry, W.Nazarewicz, H.Nitsche, J.P.Omtvedt, P.Papadakis, I.Ragnarsson, J.Runke, H.Schaffner, B.Schausten, Y.Shi, P.Thorle-Pospiech, T.Torres, T.Traut, N.Trautmann, A.Turler, A.Ward, D.E.Ward, N.Wiehl

Recoil-α-fission and recoil-α-α- fission events observed in the reaction ⁴⁸Ca + ²⁴³Am

NUCLEAR REACTIONS ²⁴³Am(⁴⁸Ca, x), E=242.1, 245.0 MeV; measured reaction products, fission products, Eα, Iα(t), αα-coin, (recoil)α-coin, En, In using He-gas filled TASCA, TASISpec based on DSSSDs, other DSSSDs; deduced correlation times, α energy spectra, 23 α-decay chains of five α's and α+3n, fragments T_1/2. Discussed existence of long decay chains; compared with published results.

RADIOACTIVITY ^289,288Mc, ²⁸⁴Nh, ²⁸⁰Rg, ²⁷⁶Mt, ²⁷²Bh(α), ²⁶⁸Db(SF); measured decay products, Eα, Iα; deduced T_1/2. Comparison with available data.

doi: 10.1016/j.nuclphysa.2016.04.025
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2016HO16      Phys.Rev. C 94, 034321 (2016)

D.Hodge, D.M.Cullen, M.J.Taylor, B.S.Nara Singh, L.S.Ferreira, E.Maglione, J.F.Smith, C.Scholey, P.Rahkila, T.Grahn, T.Braunroth, H.Badran, L.Capponi, A.Girka, P.T.Greenlees, R.Julin, J.Konki, M.Mallaburn, O.Nefodov, G.G.O'Neill, J.Pakarinen, P.Papadakis, J.Partanen, P.Ruotsalainen, M.Sandzelius, J.Saren, M.Smolen, J.Sorri, S.Stolze, J.Uusitalo

Deformation of the proton emitter ¹¹³CS from electromagnetic transition and proton-emission rates

NUCLEAR REACTIONS ⁵⁸Ni(⁵⁸Ni, 2np), E=230 MeV; measured Eγ, Iγ, proton-tagged γ spectra, Ep, Ip, half-life of ¹¹³Cs proton decay, level half-lives by recoil-decay-tagged differential-plunger combined with differential decay curve method (DDCM) using RITU separator, JUROGAM-II array and GREAT spectrometer at Jyvaskyla K130 cyclotron facility. Recoil-decay tagging method. ¹¹³Cs; deduced levels, J, B(E2), deformation of the proton-emitting ground state. Nonadiabatic quasiparticle model calculations.

doi: 10.1103/PhysRevC.94.034321
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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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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 J^π = 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, ^{218,220,222,224,226,228}Ra, ^{224,226,228,230,232}Th. Comparison with previous experimental results.

doi: 10.1103/PhysRevC.94.014307
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2015CO10      Eur.Phys.J. A 51, 64 (2015)

D.M.Cox, J.Konki, P.T.Greenlees, K.Hauschild, R.-D.Herzberg, J.Pakarinen, P.Papadakis, P.Rahkila, M.Sandzelius, J.Sorri

Simulation of the SAGE spectrometer

doi: 10.1140/epja/i2015-15064-5
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2015RU11      J.Radioanal.Nucl.Chem. 303, 1185 (2015)

D.Rudolph, U.Forsberg, P.Golubev, L.G.Sarmiento, A.Yakushev, L.-L.Andersson, A.Di Nitto, Ch.E.Dullmann, J.M.Gates, K.E.Gregorich, C.J.Gross, R.-D.Herzberg, F.P.Hessberger, J.Khuyagbaatar, J.V.Kratz, K.Rykaczewski, M.Schadel, S.Aberg, D.Ackermann, M.Block, H.Brand, B.G.Carlsson, D.Cox, X.Derkx, K.Eberhardt, J.Even, C.Fahlander, J.Gerl, E.Jager, B.Kindler, J.Krier, I.Kojouharov, N.Kurz, B.Lommel, A.Mistry, C.Mokry, H.Nitsche, J.P.Omtvedt, P.Papadakis, I.Ragnarsson, J.Runke, H.Schaffner, B.Schausten, P.Thorle-Pospiech, T.Torres, T.Traut, N.Trautmann, A.Turler, A.Ward, D.E.Ward, N.Wiehl

Selected spectroscopic results on element 115 decay chains

RADIOACTIVITY ²⁸⁸Mc, ²⁸⁴Nh, ²⁸⁰Rg, ²⁷⁶Mt, ²⁷²Bh(α), ²⁶⁸Db(SF); measured decay products, Eα, Iα; deduced Q-values, level energies, branching ratios. Comparison with GEANT4 Monte-Carlo simulations.

doi: 10.1007/s10967-014-3445-y
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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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2014KH04      Phys.Rev.Lett. 112, 172501 (2014)

J.Khuyagbaatar, A.Yakushev, C.E.Dullmann, D.Ackermann, L.-L.Andersson, M.Asai, M.Block, R.A.Boll, H.Brand, D.M.Cox, M.Dasgupta, X.Derkx, A.Di Nitto, K.Eberhardt, J.Even, M.Evers, C.Fahlander, U.Forsberg, J.M.Gates, N.Gharibyan, P.Golubev, K.E.Gregorich, J.H.Hamilton, W.Hartmann, R.-D.Herzberg, F.P.Hessberger, D.J.Hinde, J.Hoffmann, R.Hollinger, A.Hubner, E.Jager, B.Kindler, J.V.Kratz, J.Krier, N.Kurz, M.Laatiaoui, S.Lahiri, R.Lang, B.Lommel, M.Maiti, K.Miernik, S.Minami, A.Mistry, C.Mokry, H.Nitsche, J.P.Omtvedt, G.K.Pang, P.Papadakis, D.Renisch, J.Roberto, D.Rudolph, J.Runke, K.P.Rykaczewski, L.G.Sarmiento, M.Schadel, B.Schausten, A.Semchenkov, D.A.Shaughnessy, P.Steinegger, J.Steiner, E.E.Tereshatov, P.Thorle-Pospiech, K.Tinschert, T.Torres De Heidenreich, N.Trautmann, A.Turler, J.Uusitalo, D.E.Ward, M.Wegrzecki, N.Wiehl, S.M.Van Cleve, V.Yakusheva

⁴⁸Ca + ²⁴⁹Bk Fusion Reaction Leading to Element Z=117: Long-Lived α-Decaying ²⁷⁰Db and Discovery of ²⁶⁶Lr

NUCLEAR REACTIONS ²⁴⁹Bk(⁴⁸Ca, X)²⁹⁴Ts, E=268.3, 270.2, 274.1 MeV; measured reaction products, Eα, Iα; deduced σ. Comparison with experimental data.

RADIOACTIVITY ²⁹⁴Ts, ²⁹⁰Mc, ²⁸⁶Nh, ²⁸²Rg, ²⁷⁸Mt, ²⁷⁴Bh, ²⁷⁰Db, ²⁶⁶Lr(α); measured decay products, Eα, Iα; deduced T_1/2. Comparison with experimental data.

doi: 10.1103/PhysRevLett.112.172501
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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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2014RU04      Acta Phys.Pol. B45, 263 (2014)

D.Rudolph, U.Forsberg, P.Golubev, L.G.Sarmiento, A.Yakushev, L.-L.Andersson, A.Di Nitto, Ch.E.Dullmann, J.M.Gates, K.E.Gregorich, C.J.Gross, R.-D.Herzberg, F.P.Hessberger, J.Khuyagbaatar, J.V.Kratz, K.Rykaczewski, M.Schadel, S.Aberg, D.Ackermann, M.Block, H.Brand, B.G.Carlsson, D.Cox, X.Derkx, K.Eberhardt, J.Even, C.Fahlander, J.Gerl, E.Jager, B.Kindler, J.Krier, I.Kojouharov, N.Kurz, B.Lommel, A.Mistry, C.Mokry, H.Nitsche, J.P.Omtvedt, P.Papadakis, I.Ragnarsson, J.Runke, H.Schaffner, B.Schausten, P.Thorle-Pospiech, T.Torres, T.Traut, N.Trautmann, A.Turler, A.Ward, D.E.Ward, N.Wiehl

Alpha-Photon Coincidence Spectroscopy Along Element 115 Decay Chains

RADIOACTIVITY ^287,288Mc, ^283,284Nh, ^279,280Rg, ^275,276Mt, ^271,272Bh(α), ^267,268Db(SF) [from ²⁴³Am(⁴⁸Ca, X), E not given]; measured decay products, Eα, Iα, Eγ, Iγ, X-rays; deduced T_1/2, correlated α-decay chains. Comparison with available data.

doi: 10.5506/APhysPolB.45.263
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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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2013RU11      Phys.Rev.Lett. 111, 112502 (2013)

D.Rudolph, U.Forsberg, P.Golubev, L.G.Sarmiento, A.Yakushev, L.-L.Andersson, A.Di Nitto, Ch.E.Dullmann, J.M.Gates, K.E.Gregorich, C.J.Gross, F.P.Hessberger, R.-D.Herzberg, J.Khuyagbaatar, J.V.Kratz, K.Rykaczewski, M.Schadel, S.Aberg, D.Ackermann, M.Block, H.Brand, B.G.Carlsson, D.Cox, X.Derkx, K.Eberhardt, J.Even, C.Fahlander, J.Gerl, E.Jager, B.Kindler, J.Krier, I.Kojouharov, N.Kurz, B.Lommel, A.Mistry, C.Mokry, H.Nitsche, J.P.Omtvedt, P.Papadakis, I.Ragnarsson, J.Runke, H.Schaffner, B.Schausten, P.Thorle-Pospiech, T.Torres, T.Traut, N.Trautmann, A.Turler, A.Ward, D.E.Ward, N.Wiehl

Spectroscopy of Element 115 Decay Chains

RADIOACTIVITY ²⁸⁸Mc, ²⁸⁴Nh, ²⁸⁰Rg, ²⁷⁶Mt, ²⁷²Bh(α) [from ²⁴³Am(⁴⁸Ca, X), E=5.4 MeV/nucleon]; measured decay products, Eα, Iα, Eγ, Iγ, X-rays. ²⁸⁰Rg, ²⁷⁶Mt; deduced T_1/2, Q-value, α-decay scheme. Comparison with Monte Carlo calculations.

doi: 10.1103/PhysRevLett.111.112502
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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, T_1/2, rotational band structure, energies, J, π, moments of inertia. Comparison with available data, systematics.

doi: 10.1103/PhysRevLett.109.012501
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2012PA46      J.Phys.:Conf.Ser. 381, 012051 (2012)

P.Papadakis, D.M.Cox, J.Konki, P.A.Butler, P.T.Greenlees, K.Hauschild, R.-D.Herzberg, J.Pakarinen, P.Rahkila, M.Sandzelius, J.Sorri

A Geant4 simulation package for the SAGE spectrometer

doi: 10.1088/1742-6596/381/1/012051
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2012PI05      Phys.Rev. C 85, 041301 (2012)

J.Piot, B.J.-P.Gall, O.Dorvaux, P.T.Greenlees, N.Rowley, L.L.Andersson, D.M.Cox, F.Dechery, 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, P.Nieminen, J.Pakarinen, P.Papadakis, E.Parr, P.Peura, P.Rahkila, S.Rinta-Antila, J.Rubert, P.Ruotsalainen, M.Sandzelius, J.Saren, C.Scholey, D.Seweryniak, J.Sorri, B.Sulignano, J.Uusitalo

In-beam spectroscopy with intense ion beams: Evidence for a rotational structure in ²⁴⁶Fm

NUCLEAR REACTIONS ²⁰⁸Pb(⁴⁰Ar, 2n), E=186 MeV; measured Eγ, Iγ, γγ-coin, Eα, α(recoil) correlations, σ using JUROGAM-II array, RITU separator, and GREAT spectrometer at JYFL facility. Recoil-decay tagging technique. ²⁴⁶Fm; deduced levels, J, π, rotational band, dynamic moment of inertia plot. Comparison with ground-state bands in ^{248,250,252,254,256}Fm.

RADIOACTIVITY ²⁴⁶Fm(α); measured Eα, half-life.

doi: 10.1103/PhysRevC.85.041301
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2012SU22      Phys.Rev. C 86, 044318 (2012)

B.Sulignano, Ch.Theisen, J.-P.Delaroche, M.Girod, J.Ljungvall, D.Ackermann, S.Antalic, O.Dorvaux, A.Drouart, B.Gall, A.Gorgen, P.T.Greenlees, K.Hauschild, R.-D.Herzberg, F.P.Hessberger, U.Jakobsson, P.Jones, R.Julin, S.Juutinen, S.Ketelhut, W.Korten, M.Leino, A.Lopez-Martens, M.Nyman, A.Obertelli, J.Pakarinen, P.Papadakis, E.Parr, P.Peura, J.Piot, P.Rahkila, D.Rostron, P.Ruotsalainen, J.Saren, C.Scholey, J.Sorri, J.Uusitalo, M.Venhart, M.Zielinska

Investigation of high-K states in ²⁵²No

NUCLEAR REACTIONS ²⁰⁶Pb(⁴⁸Ca, 2n), E=218 MeV; measured Eγ, Iγ, γγ-, γ(ce)-coin, E(ce), I(ce), Eα, isomer half-life using RITU separator, GREAT spectrometer and JUROGAM array at Jyvaskyla facility. ²⁵²No; deduced levels, J, π, rotational bands, configuration, high-K states, hindrance factors. ²⁵⁰Fm, ²⁵²No; systematics of dynamic moments of inertia and proton pairing energies. Comparison with Hartree-Fock-Bogoliubov (HFB) mean-field calculations.

RADIOACTIVITY ²⁵²No(α), (SF); measured Eα, Iα, (evaporation residues)α correlations, half-life, branching ratios for decay modes. ²⁴⁴Cf, ^248,250Fm, ^253,254No(α); measured α spectrum.

doi: 10.1103/PhysRevC.86.044318
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2011RO20      Phys.Rev. C 83, 064311 (2011)

A.P.Robinson, T.L.Khoo, D.Seweryniak, I.Ahmad, M.Asai, B.B.Back, M.P.Carpenter, P.Chowdhury, C.N.Davids, J.Greene, P.T.Greenlees, K.Hauschild, A.Heinz, R.-D.Herzberg, R.V.F.Janssens, D.G.Jenkins, G.D.Jones, S.Ketelhut, F.G.Kondev, T.Lauritsen, C.J.Lister, A.Lopez-Martens, P.Marley, E.McCutchan, P.Papadakis, D.Peterson, J.Qian, D.Rostron, U.Shirwadkar, I.Stefanescu, S.K.Tandel, X.Wang, S.Zhu

Search for a 2-quasiparticle high-K isomer in ²⁵⁶Rf

NUCLEAR STRUCTURE ²⁵⁶Rf; calculated ground state and rotational band energies, configurations using Woods-Saxon Potential.

NUCLEAR REACTIONS ²⁰⁸Pb(⁵⁰Ti, 2n), E=240 MeV; measured Eγ, Iγ, ce, γγ-, γ(ce)-coin, γ(t), half-life. ²⁵⁶Rf; deduced levels, J, π, isomers, configurations; calculated energies of two-quasiparticle high-K isomers with the universal Woods-Saxon energies. ¹⁷⁰Er(⁵⁰Ti, 4n)²¹⁶Th, E=222 MeV; measured Eγ, ce, γ(ce)-coin from isomer, half-life, isomer ratio; used as a test case.

doi: 10.1103/PhysRevC.83.064311
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2011SC07      Phys.Rev. C 83, 037303 (2011)

M.Scheck, P.A.Butler, L.P.Gaffney, N.Bree, R.J.Carrol, D.Cox, T.Grahn, P.T.Greenlees, K.Hauschild, A.Herzan, M.Huyse, U.Jakobsson, P.Jones, D.T.Joss, R.Julin, S.Juutinen, S.Ketelhut, R.-D.Herzberg, M.Kowalczyk, A.C.Larsen, M.Leino, A.Lopez-Martens, P.Nieminen, R.D.Page, J.Pakarinen, P.Papadakis, P.Peura, P.Rahkila, S.Rinta-Antila, P.Ruotsalainen, M.Sandzelius, J.Saren, C.Scholey, J.Sorri, J.Srebrny, P.Van Duppen, H.V.Watkins, J.Uusitalo

Combined in-beam electron and γ -ray spectroscopy of ^{184, 186}Hg

NUCLEAR REACTIONS ¹⁴⁸Sm(⁴⁰Ar, 4n), E=180 MeV; ¹⁵⁰Sm(⁴⁰Ar, 4n), E=188 MeV; measured Eγ using JUROGAM detector array, conversion electron spectra using SAGE spectrometer, and γ(ce)-coin. ^184,186Hg; deduced levels, J, π, K- and L-conversion electron ratios, and conversion coefficients, multipolarity, E0 admixture, monopole strength.

doi: 10.1103/PhysRevC.83.037303
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2011VE03      Eur.Phys.J. A 47, 20 (2011)

M.Venhart, F.P.Hessberger, D.Ackermann, S.Antalic, C.Gray-Jones, P.T.Greenlees, S.Heinz, R.-D.Herzberg, S.Hofmann, S.Ketelhut, B.Kindler, I.Kojouharov, M.Leino, B.Lommel, R.Mann, P.Papadakis, D.Rostron, D.Rudolph, S.Saro, B.Sulignano

Decay study of ²⁴⁶Fm at SHIP

NUCLEAR REACTIONS ²⁰⁸Pb(⁴⁰Ar, 2n), E=186.4 MeV; measured E(particle), I(particle, θ), Eα, Iα(t), E(CE), I(CE), Eγ, Iγ, X-rays, αβ-coin, αγ-coin, (ER)α-coin, (fragment)γ-coin. ²⁴⁶Fm calculated two-quasineutron levels, J, π using Woods-Saxon and self-consistent mean field with Gogny forces, T_1/2 for high-K states; deduced T_1/2, spontaneous fission T_1/2, α, SF, EC branching ratio, two-quasineutron levels. ²⁴²Cf deduced α, EC branching ratio.

doi: 10.1140/epja/i2011-11020-9
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2010RA12      Phys.Rev. C 82, 011303 (2010)

P.Rahkila, D.G.Jenkins, J.Pakarinen, C.Gray-Jones, P.T.Greenlees, U.Jakobsson, P.Jones, R.Julin, S.Juutinen, S.Ketelhut, H.Koivisto, M.Leino, P.Nieminen, M.Nyman, P.Papadakis, S.Paschalis, M.Petri, P.Peura, O.J.Roberts, T.Ropponen, P.Ruotsalainen, J.Saren, C.Scholey, J.Sorri, A.G.Tuff, J.Uusitalo, R.Wadsworth, M.Bender, P.-H.Heenen

Shape coexistence at the proton drip-line: First identification of excited states in ¹⁸⁰Pb

NUCLEAR REACTIONS ⁹²Mo(⁹⁰Zr, 2n)¹⁸⁰Pb, E=400 MeV; measured Eγ, Iγ, (recoil)γ-, (recoil)αγ coin using the JUROGAM II array and recoil-decay tagging (RDT) technique. ¹⁸⁰Pb; deduced levels, J, π, band. Comparison with beyond-mean-field theoretical calculations. Z=82, A=180-208; systematics of spherical, prolate and oblate structures.

RADIOACTIVITY ¹⁸⁰Pb(α); measured Eα and half-life. ^176,177Hg, ^179mTl(α); measured Eα.

doi: 10.1103/PhysRevC.82.011303
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2010SE10      Nucl.Phys. A834, 357c (2010)

D.Seweryniak, T.L.Khoo, I.Ahmad, F.G.Kondev, A.Robinson, S.K.Tandel, M.Asai, B.B.Back, M.P.Carpenter, P.Chowdhury, C.N.Davids, S.Eeckhaudt, J.P.Greene, P.T.Greenlees, S.Gros, K.Hauschild, A.Heinz, R.-D.Herzberg, R.V.F.Janssens, D.G.Jenkins, G.D.Jones, S.Ketelhut, T.Lauritsen, C.J.Lister, A.Lopez-Martens, P.Marley, E.A.McCutchan, T.Nakatsukasa, P.Papadakis, D.Peterson, J.Qian, D.Rostron, I.Stefanescu, U.S.Tandel, X.F.Wang, S.F.Zhu

Bridging the nuclear structure gap between stable and super heavy nuclei

NUCLEAR STRUCTURE ²⁴⁹Bk; calculated single-proton energies using different interactions; ^252,254No, ^256,257Rf; deduced configurations. Comparison with data.

doi: 10.1016/j.nuclphysa.2010.01.039
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2009KE02      Phys.Rev.Lett. 102, 212501 (2009)

S.Ketelhut, P.T.Greenlees, D.Ackermann, S.Antalic, E.Clement, I.G.Darby, O.Dorvaux, A.Drouart, S.Eeckhaudt, B.J.P.Gall, A.Gorgen, T.Grahn, C.Gray-Jones, K.Hauschild, R.-D.Herzberg, F.P.Hessberger, U.Jakobsson, G.D.Jones, P.Jones, R.Julin, S.Juutinen, T.-L.Khoo, W.Korten, M.Leino, A.-P.Leppanen, J.Ljungvall, S.Moon, M.Nyman, A.Obertelli, J.Pakarinen, E.Parr, P.Papadakis, P.Peura, J.Piot, A.Pritchard, P.Rahkila, D.Rostron, P.Ruotsalainen, M.Sandzelius, J.Saren, C.Scholey, J.Sorri, A.Steer, B.Sulignano, Ch.Theisen, J.Uusitalo, M.Venhart, M.Zielinska, M.Bender, P.-H.Heenen

γ-Ray Spectroscopy at the Limits: First Observation of Rotational Bands in ²⁵⁵Lr

NUCLEAR REACTIONS ²⁰⁹Bi(⁴⁸Ca, 2n), E=219, 221 MeV; Measured Eγ, Iγ, αγ-coin; Deduced rotational bands; Calculated rotational bands;²⁵¹Md;²⁵⁵Lr; Compared theoretical and experimental results.

doi: 10.1103/PhysRevLett.102.212501
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