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NSR database version of April 11, 2024.

Search: Author = B.Andel

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2023AN09      Phys.Rev. C 108, 034303 (2023)

A.N.Andreyev, D.Seweryniak, B.Andel, S.Antalic, D.T.Doherty, A.Korichi, C.Barton, L.Canete, M.P.Carpenter, R.M.Clark, P.A.Copp, J.G.Cubiss, J.Heery, Y.Hrabar, H.Huang, T.Huang, V.Karayonchev, F.G.Kondev, T.Lauritsen, Z.Liu, G.Lotay, C.Muller-Gatermann, S.Nandi, C.Page, D.H.Potterveld, P.H.Regan, W.Reviol, D.Rudolph, M.Siciliano, R.S.Sidhu, A.Sitarcik, P.J.Woods, Z.Yue, W.Zhang

α decay of the neutron-deficient isotope 190At

doi: 10.1103/PhysRevC.108.034303
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2023BR10      Phys.Lett. B 847, 138310 (2023)

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

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

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

doi: 10.1016/j.physletb.2023.138310
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2023CU04      Phys.Rev.Lett. 131, 202501 (2023)

J.G.Cubiss, A.N.Andreyev, A.E.Barzakh, P.Van Duppen, S.Hilaire, S.Peru, S.Goriely, M.Al Monthery, N.A.Althubiti, B.Andel, S.Antalic, D.Atanasov, K.Blaum, T.E.Cocolios, T.Day Goodacre, A.de Roubin, G.J.Farooq-Smith, D.V.Fedorov, V.N.Fedosseev, D.A.Fink, L.P.Gaffney, L.Ghys, R.D.Harding, M.Huyse, N.Imai, D.T.Joss, S.Kreim, D.Lunney, K.M.Lynch, V.Manea, B.A.Marsh, Y.Martinez Palenzuela, P.L.Molkanov, D.Neidherr, G.G.O'Neill, R.D.Page, S.D.Prosnyak, M.Rosenbusch, R.E.Rossel, S.Rothe, L.Schweikhard, M.D.Seliverstov, S.Sels, L.V.Skripnikov, A.Stott, C.Van Beveren, E.Verstraelen, A.Welker, F.Wienholtz, R.N.Wolf, K.Zuber

Deformation versus Sphericity in the Ground States of the Lightest Gold Isotopes

NUCLEAR MOMENTS 176,177,178,179,180,181,182,183,187,191,193,195Au [from U(p, X), E=1.4 GeV]; measured frequencies; deduced mean-squared charge radii, ground-state deformations, nuclear magnetic moments. Comparison with available data. The in-source, resonance-ionization laser spectroscopy technique, at the ISOLDE facility (CERN).

doi: 10.1103/PhysRevLett.131.202501
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2022BR08      Phys.Rev. C 106, 014602 (2022)

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

Decay studies of new isomeric states in 255No

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

doi: 10.1103/PhysRevC.106.014602
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetD8054. Data from this article have been entered in the XUNDL database. For more information, click here.


2022HA04      Eur.Phys.J. A 58, 6 (2022)

K.Hauschild, A.Lopez-Martens, R.Chakma, M.L.Chelnokov, V.I.Chepigin, A.V.Isaev, I.N.Izosimov, D.E.Katrasev, A.A.Kuznetsova, O.N.Malyshev, A.G.Popeko, E.A.Sokol, A.I.Svirikhin, M.S.Tezekbayeva, A.V.Yeremin, Z.Asfari, O.Dorvaux, B.J.P.Gall, K.Kessaci, D.Ackermann, J.Piot, P.Mosat, B.Andel

Alpha-decay spectroscopy of 257Rf

RADIOACTIVITY 257Rf(α), (IT) [from 208Pb(50Ti, n), E=240-245 MeV]; measured decay products, Eα, Iα, Eγ, Iγ; deduced α-particles energies and intensities, T1/2, J, π, decay scheme. Nilsson configurations. The detectorarray GABRIELA at the FLNR, Dubna.

doi: 10.1140/epja/s10050-021-00657-8
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2022HE04      Eur.Phys.J. A 58, 11 (2022)

F.P.Hessberger, S.Antalic, F.Giacoppo, B.Andel, D.Ackermann, M.Block, S.Heinz, J.Khuyagbaatar, I.Kojouharov, M.Venhart

Alpha-gamma decay studies of 247Md

RADIOACTIVITY 247Md(IT), (α), (SF) [from 209Bi(40Ar, X)247Md, E=184-188 MeV]; measured decay products, Eα, Iα, Eγ, Iγ, α-γ-coin. 243Es;deduced γ- and α-particles energies and intensities, J, π, isomeric state T1/2. Comparison with Nilsson levels. GSI Darmstadt, Penning source of the UNILAC, the velocity filter SHIP.

doi: 10.1140/epja/s10050-022-00663-4
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2022HU09      Phys.Lett. B 833, 137345 (2022)

H.Huang, W.Q.Zhang, A.N.Andreyev, Z.Liu, D.Seweryniak, Z.H.Li, C.Y.Guo, A.E.Barzakh, P.Van Duppen, B.Andel, S.Antalic, M.Block, A.Bronis, M.P.Carpenter, P.Copp, J.G.Cubiss, B.Ding, D.T.Doherty, Z.Favier, F.Giacoppo, T.H.Huang, B.Kindler, F.G.Kondev, T.Lauritsen, J.G.Li, G.S.Li, B.Lommel, H.Y.Lu, M.Al Monthery, P.Mosat, Y.F.Niu, C.Raison, W.Reviol, G.Savard, S.Stolze, G.L.Wilson, H.Y.Wu, Z.H.Wang, F.R.Xu, Q.B.Zeng, X.H.Yu, F.F.Zeng, X.H.Zhou

First observation of the decay of the 13/2+ isomer in 183Hg and B(M2) systematics of neutron transitions across the nuclear chart

RADIOACTIVITY 183Hg(α) [from 187Pb α decay]; 187mPb(α) [from 142Nd(50Cr, 3n2pγ), E=255 MeV, followed by separation of fragments using Argonne gas-filled analyzer (AGFA) at the ATLAS-ANL facility]; measured reaction products, evaporation residues (EVRs), Eα, Iα, (EVR)α-correlations, αγ(t), Eγ, Iγ, x rays, T1/2 using double-sided silicon strip detector (DSSD), and four HPGe clover detectors. 183,183mHg; deduced levels, isomer, J, π, T1/2 of g.s. and isomer, α branching ratio, K-conversion coefficient, multipolarity, B(M2), Nilsson configurations. 187mPb; deduced T1/2. Systematics of decay schemes of 13/2+ isomers in 175,177,179,181,183,185Hg. Systematics of B(M2) values for 7/2-, 9/2+, 11/2- and 13/2+ isomers in even-Z, odd-N nuclei: 25Mg, 33Si, 33,35S, 37Ar, 39Ca, 59Cr, 61Fe, 63,67Ni, 63,65,67Zn, 67,69,71Ge, 69,71Se, 97,99Mo, 99,101,103Ru, 103,105Pd, 107,109Cd, 109,111,113,115Sn, 153Yb, 161Hf, 163W, 163Os, 171,189,191Pt, 181,183,201,203,205Hg, 209Pb, 205,207,211Po, 207,209,213Rn, 209,211Ra, 211,213Th.

doi: 10.1016/j.physletb.2022.137345
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2022TE01      Eur.Phys.J. A 58, 52 (2022)

M.S.Tezekbayeva, A.V.Yeremin, A.I.Svirikhin, A.Lopez-Martens, M.L.Chelnokov, V.I.Chepigin, A.V.Isaev, I.N.Izosimov, A.V.Karpov, A.A.Kuznetsova, O.N.Malyshev, R.S.Mukhin, A.G.Popeko, Yu.A.Popov, V.A.Rachkov, B.S.Sailaubekov, E.A.Sokol, K.Hauschild, H.Jacob, R.Chakma, O.Dorvaux, M.Forge, B.Gall, K.Kessaci, B.Andel, S.Antalic, A.Bronis, P.Mosat

Study of the production and decay properties of neutron-deficient nobelium isotopes

RADIOACTIVITY 249,250,250m,251No(α)[from 204Pb(48Ca, xn), E=225.2, 230.0, 237.0, 242.0, 246.0 MeV]; 245Fm, 245Es, 241Cf(α)[from 249No α decay]; measured decay products, Eα, Iα, (evaporation residues)α-corelations using SHELS separator and the GABRIELA detector system at FLNR-JINR-Dubna; deduced T1/2, production σ for 249No, an upper limit on the fission branch. 245Fm(EC), (β+); deduced branching ratio for ϵ+β+ decay mode. Comparison with previous experimental results.

doi: 10.1140/epja/s10050-022-00707-9
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2022ZH22      Phys.Lett. B 829, 137129 (2022)

W.Q.Zhang, A.N.Andreyev, Z.Liu, D.Seweryniak, H.Huang, Z.H.Li, J.G.Li, C.Y.Guo, D.T.Doherty, A.E.Barzakh, P.Van Duppen, J.G.Cubiss, B.Andel, S.Antalic, M.Block, A.Bronis, M.P.Carpenter, P.Copp, B.Ding, Z.Favier, F.Giacoppo, T.H.Huang, X.H.Yu, B.Kindler, F.G.Kondev, T.Lauritsen, G.S.Li, B.Lommel, H.Y.Lu, M.Al Monthery, P.Mosat, Y.F.Niu, C.Raison, W.Reviol, G.Savard, S.Stolze, G.L.Wilson, H.Y.Wu, Z.H.Wang, F.R.Xu, Q.B.Zeng, X.H.Zhou

First observation of a shape isomer and a low-lying strongly-coupled prolate band in neutron-deficient semi-magic 187Pb

NUCLEAR REACTIONS 142Nd(50Cr, 3n2p)187Pb, E=255 MeV beam from ATLAS-ANL facility, followed by separation of evaporation residues (EVRs) using Argonne Gas-Filled Analyzer; measured Eα, Eγ, Iγ, x rays, αγ-coin, γγ-coin, T1/2 of a new low-energy microsec-isomer by αγ(t) using Gammasphere for γ detection and double-sided silicon strip detector (DSSD) for EVRs and α particles. Recoil-decay tagging (RDT) and isomer-decay tagging (IDT) methods. 187Pb; deduced high-spin levels, J, π, isomer, K-conversion coefficient, multipolarity, bands, B(E2), B(M1)/B(E2), triple-shape coexistence at low energy. Comparison with band structure in 185Hg. Systematics of aligned angular momenta plots and experimental Routhians for bands in 183,185Hg, 187Pb. 184Hg, 186Pb, 187Tl; observed γ rays. 186,187m,188Pb; observed α-decay peaks.

doi: 10.1016/j.physletb.2022.137129
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2022ZH46      Phys.Rev. C 106, 024317 (2022)

W.Q.Zhang, A.N.Andreyev, Z.Liu, D.Seweryniak, H.Huang, Z.H.Li, J.G.Li, C.Y.Guo, A.E.Barzakh, P.Van Duppen, M.Al Monthery, B.Andel, S.Antalic, M.Block, A.Bronis, M.P.Carpenter, P.Copp, J.G.Cubiss, B.Ding, D.T.Doherty, Z.Favier, F.Giacoppo, T.H.Huang, B.Kindler, F.G.Kondev, T.Lauritsen, G.S.Li, B.Lommel, H.Y.Lu, P.Mosat, Y.F.Niu, C.Raison, W.Reviol, G.Savard, S.Stolze, G.L.Wilson, H.Y.Wu, Z.H.Wang, F.R.Xu, X.H.Yu, Q.B.Zeng, X.H.Zhou

Identification of excited states in 188Bi and 188Po

NUCLEAR REACTIONS 142Nd(50Cr, 3np)188Bi, (50Cr, 4n)188Po, E=255 MeV; measured evaporation residues (EVRs), Eα, Eγ, Iγ, x rays, (EVR)γ-coin, αγ-coin, γγ-coin, using four clover HPGe detectors, Gammasphere array with 64 Compton-suppressed HPGe detectors, and DSSD and DSSD+Sibox at the ATLAS-ANL accelerator facility. 186,187,187m,188Pb, 189,189mBi; deduced recoil-decay tagging (RDT) γ-ray yields. 188Bi; deduced levels, J, π, isomer, T1/2 and decay modes of isomer, K-conversion coefficients, multipolarities, configurations. 188Po; deduced energy of the first 2+ level. 186Pb; deduced levels, J, π. 183,184,186Hg, 186,187,187m,188Pb, 188,189,189mBi; observed Eα. Systematics of 9/2-, 1/2+, 7/2- and 13/2+ level energies in 185,187,189,191,193,195Bi, and those of first 2+, 4+, 6+ and 8+, second 0+, 2+ and 4+ in 188,190,192,194,196,198,200,202,204,206,208,210Po.

doi: 10.1103/PhysRevC.106.024317
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2021AN14      Phys.Rev. C 104, 054301 (2021)

B.Andel, for the IDS Collaboration

New β-decaying state in 214Bi

RADIOACTIVITY 214,214mBi(β-)[from U(p, X), E=1.4 GeV using RILIS and HRS separator at ISOLDE-CERN facility]; measured Eγ, Iγ, βγ- and γγ-coin, half-lives of decays of 214Bi and 214mBi. 214Po; deduced high-spin levels from the decay of 214mBi, J, π, conversion coefficients for low-energy transitions, multipolarities, Iβ feedings, logft values. 214Bi; deduced new β- decaying isomer, J, π. Comparison with shell-model calculations using H208 and the modified Kuo-Herling particle effective (KHPE) interactions.

doi: 10.1103/PhysRevC.104.054301
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2021BA45      Phys.Rev.Lett. 127, 192501 (2021)

A.Barzakh, A.N.Andreyev, C.Raison, J.G.Cubiss, P.Van Duppen, S.Peru, S.Hilaire, S.Goriely, B.Andel, S.Antalic, M.Al Monthery, J.C.Berengut, J.Bieron, M.L.Bissell, A.Borschevsky, K.Chrysalidis, T.E.Cocolios, T.Day Goodacre, J.-P.Dognon, M.Elantkowska, E.Eliav, G.J.Farooq-Smith, D.V.Fedorov, V.N.Fedosseev, L.P.Gaffney, R.F.Garcia Ruiz, M.Godefroid, C.Granados, R.D.Harding, R.Heinke, M.Huyse, J.Karls, P.Larmonier, J.G.Li, K.M.Lynch, D.E.Maison, B.A.Marsh, P.Molkanov, P.Mosat, A.V.Oleynichenko, V.Panteleev, P.Pyykko, M.L.Reitsma, K.Rezynkina, R.E.Rossel, S.Rothe, J.Ruczkowski, S.Schiffmann, C.Seiffert, M.D.Seliverstov, S.Sels, L.V.Skripnikov, M.Stryjczyk, D.Studer, M.Verlinde, S.Wilman, A.V.Zaitsevskii

Large Shape Staggering in Neutron-Deficient Bi Isotopes

NUCLEAR MOMENTS 187,188,189,191Bi; measured frequencies. 209Bi; deduced hfs, mean-square charge radii, magnetic dipole, and electric quadrupole moments. Comparison with HFB PES calculations, available data.

doi: 10.1103/PhysRevLett.127.192501
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2021DA01      Phys.Rev.Lett. 126, 032502 (2021)

T.Day Goodacre, A.V.Afanasjev, A.E.Barzakh, B.A.Marsh, S.Sels, P.Ring, H.Nakada, A.N.Andreyev, P.Van Duppen, N.A.Althubiti, B.Andel, D.Atanasov, J.Billowes, K.Blaum, T.E.Cocolios, J.G.Cubiss, G.J.Farooq-Smith, D.V.Fedorov, V.N.Fedosseev, K.T.Flanagan, L.P.Gaffney, L.Ghys, M.Huyse, S.Kreim, D.Lunney, K.M.Lynch, V.Manea, Y.Martinez Palenzuela, P.L.Molkanov, M.Rosenbusch, R.E.Rossel, S.Rothe, L.Schweikhard, M.D.Seliverstov, P.Spagnoletti, C.Van Beveren, M.Veinhard, E.Verstraelen, A.Welker, K.Wendt, F.Wienholtz, R.N.Wolf, A.Zadvornaya, K.Zuber

Laser Spectroscopy of Neutron-Rich 207, 208Hg Isotopes: Illuminating the Kink and Odd-Even Staggering in Charge Radii across the N = 126 Shell Closure

NUCLEAR MOMENTS 202,203,206,207,208Hg; measured frequencies; deduced hyperfine spectra, mean-square charge radii. Comparison with relativistic Hartree-Bogoliubov and nonrelativistic Hartree-Fock-Bogoliubov approaches, available data.

doi: 10.1103/PhysRevLett.126.032502
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2021DA16      Phys.Rev. C 104, 054322 (2021)

T.Day Goodacre, A.V.Afanasjev, A.E.Barzakh, L.Nies, B.A.Marsh, S.Sels, U.C.Perera, P.Ring, F.Wienholtz, A.N.Andreyev, P.Van Duppen, N.A.Althubiti, B.Andel, D.Atanasov, R.S.Augusto, J.Billowes, K.Blaum, T.E.Cocolios, J.G.Cubiss, G.J.Farooq-Smith, D.V.Fedorov, V.N.Fedosseev, K.T.Flanagan, L.P.Gaffney, L.Ghys, A.Gottberg, M.Huyse, S.Kreim, P.Kunz, D.Lunney, K.M.Lynch, V.Manea, Y.Martinez Palenzuela, T.M.Medonca, P.L.Molkanov, M.Mougeot, J.P.Ramos, M.Rosenbusch, R.E.Rossel, S.Rothe, L.Schweikhard, M.D.Seliverstov, P.Spagnoletti, C.Van Beveren, M.Veinhard, E.Verstraelen, A.Welker, K.Wendt, R.N.Wolf, A.Zadvornaya, K.Zuber

Charge radii, moments, and masses of mercury isotopes across the N=126 shell closure

NUCLEAR MOMENTS 198,202,203,206,207,208Hg; measured hyperfine structure spectra using Versatile Arc Discharge and Laser Ion Source (VADLIS) in CERN-ISOLDE Resonance Ionization Laser Ion Source (RILIS) mode; deduced isotope shifts (δν) and charge radii (δ<r2) with respect to 198Hg, hyperfine factors a and b, static magnetic dipole (μ) and electric quadrupole (Q) moments for the ground states of 203Hg and 207Hg, Comparison of g factors with Schmidt values for 207Hg, 209Pb, 210Bi and 211Po, and charge radii, and odd-even staggering (OES) of the mean square charge radii with relativistic Hartree-Bogoliubov (RHB) calculations using DD-ME2, DD-MEδ, DD-PC1 and NL3* covariant energy-density functionals for 197,198,199,200,201,202,203,204,205,206,207,208,209,210,211,212,213,214Pb, 201,202,203,204,205,206,207,208,209,210Hg. Source of Hg isotopes were produced in Pb(p, X), E=1.4 GeV reaction, and using VADLIS+RILIS ion source, followed by separation of fragments using ISOLDE General Purpose Separator. 183,184,185,202,203,206,207,208Hg; measured ionization and release efficiency as a function of the half-life of mercury isotopes from a molten lead target, and compared with ABRABLA, FLUKA, and GEANT4 simulations.

ATOMIC MASSES 206,207,208Hg, 208Pb; measured time-of-flight ion-cyclotron resonances, with reference to 208Pb using the RILIS+VADIS ion source and ISOLTRAP MR-ToF mass spectrometer (MS) at CERN-ISOLDE; deduced mass excesses for 206,207,208Hg, and compared with AME2020 values.

doi: 10.1103/PhysRevC.104.054322
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2021HA32      Phys.Rev. C 104, 024326 (2021)

R.D.Harding, A.N.Andreyev, A.E.Barzakh, J.G.Cubiss, P.Van Duppen, M.Al Monthery, N.A.Althubiti, B.Andel, S.Antalic, T.E.Cocolios, T.Day Goodacre, K.Dockx, G.J.Farooq-Smith, D.V.Fedorov, V.N.Fedosseev, D.A.Fink, L.P.Gaffney, L.Ghys, J.D.Johnson, D.T.Joss, M.Huyse, N.Imai, K.M.Lynch, B.A.Marsh, Y.Martinez Palenzuela, P.L.Molkanov, G.G.O'Neill, R.D.Page, R.E.Rossel, S.Rothe, M.D.Seliverstov, S.Sels, C.Van Beveren, E.Verstraelen

Laser-assisted nuclear decay spectroscopy of 176, 177, 179Au

RADIOACTIVITY 179Au(α), (EC), (β+); 177,177m,176,176mAu, 176,177,179Pt, 173,173m,172,172mIr(α)[179,177,176Au laser ionized and mass-separated beams from U(p, X), E=1.4 GeV, followed by separation of products using Resonance Ionization Laser Ion Source (RILIS) and General Purpose Separator (GPS) at the Windmill decay station of ISOLDE-CERN facility]; measured Eα, Iα, K-x rays, Eγ, Iγ, αγ-coin. 179Pt, 175,173,172Ir, 175Os, 169,168Re; deduced levels, J, π, α-hindrance factors, reduced α-widths, conversion coefficients, multipolarities. 176,176mAu; deduced α-decay branching ratios for the low-spin and high-spin states. 179Au; measured half-life of the decay of the ground state. Systematics of α-reduced widths for 171,173,175,176,177,179Au α decays.

NUCLEAR MOMENTS 176,176mAu; measured in-source laser spectroscopy of hyperfine structure; deduced nuclear magnetic moments, spins and configurations for the high- and low-spin states.

doi: 10.1103/PhysRevC.104.024326
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2021SV02      Phys.Part. and Nucl.Lett. 18, 445 (2021)

A.I.Svirikhin, A.V.Yeremin, N.I.Zamyatin, I.N.Izosimov, A.V.Isaev, A.A.Kuznetsova, O.N.Malyshev, R.S.Mukhin, A.G.Popeko, Y.A.Popov, E.A.Sokol, B.Sailaubekov, M.S.Tezekbayeva, M.L.Chelnokov, V.I.Chepigin, B.Andel, S.Antalic, A.Bronis, P.Mosat, B.Gall, O.Dorvaux, A.Lopez-Martens, K.Hauschild

The New 249No Isotope

RADIOACTIVITY 249No, 245Fm(α) [from 204Pb(48Ca, X), E=225.4 MeV]; measured decay products, Eα, Iα; deduced Q-values, T1/2, an upper limit on the fission branch. Comparison with available data. SHELS separator using the GABRIELA detector array.

doi: 10.1134/s1547477121040154
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2020AN12      Phys.Rev. C 102, 014319 (2020)

B.Andel, A.N.Andreyev, S.Antalic, M.Al Monthery, A.Barzakh, M.L.Bissell, K.Chrysalidis, T.E.Cocolios, J.G.Cubiss, T.Day Goodacre, N.Dubray, G.J.Farooq-Smith, D.V.Fedorov, V.N.Fedosseev, L.P.Gaffney, R.F.Garcia Ruiz, S.Goriely, C.Granados, R.D.Harding, R.Heinke, S.Hilaire, M.Huyse, J.-F.Lemaitre, K.M.Lynch, B.A.Marsh, P.Molkanov, P.Mosat, S.Peru, C.Raison, S.Rothe, C.Seiffert, M.D.Seliverstov, S.Sels, D.Studer, J.Sundberg, P.Van Duppen

β-delayed fission of isomers in 188Bi

RADIOACTIVITY 188,188m,190,190mBi(α), (β+F)[from U(p, X), E=1.4 GeV using RILIS and HRS separators at ISOLDE-CERN facility]; measured Eα, Iα, fission fragment energies, (fission fragment)(fission fragment)-coin; deduced partial T1/2 of β+-delayed fission (βDF) mode, βDF probabilities. 188Pb; deduced mean total kinetic energy and fission fragment mass distribution after 188Bi β-decay of high-spin isomer of 188Bi, limits of βDF partial half-lives of the two activities in 190Bi. Comparison of partial βDF partial half-lives with calculations based on HFB and QRPA, and those of fragment mass distribution with SPY and FRLDM-based calculations. Systematics of βDF partial T1/2 in neutron deficient nuclei in Tl, Bi, At, Fr, Np, Am, Bk, Es and Md isotopes. 182,184,186,188,190,192Pb; calculated theoretical pre-neutron-emission fission fragment mass distributions (FFMDs) with the SPY model using the D1M-Gogny interaction, and with the FRLDM model.

doi: 10.1103/PhysRevC.102.014319
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2020BA17      Phys.Rev. C 101, 034308 (2020)

A.E.Barzakh, D.Atanasov, A.N.Andreyev, M.Al Monthery, N.A.Althubiti, B.Andel, S.Antalic, K.Blaum, T.E.Cocolios, J.G.Cubiss, P.Van Duppen, T.Day Goodacre, A.de Roubin, Yu.A.Demidov, G.J.Farooq-Smith, D.V.Fedorov, V.N.Fedosseev, D.A.Fink, L.P.Gaffney, L.Ghys, R.D.Harding, D.T.Joss, F.Herfurth, M.Huyse, N.Imai, M.G.Kozlov, S.Kreim, D.Lunney, K.M.Lynch, V.Manea, B.A.Marsh, Y.Martinez Palenzuela, P.L.Molkanov, D.Neidherr, R.D.Page, M.Rosenbusch, R.E.Rossel, S.Rothe, L.Schweikhard, M.D.Seliverstov, S.Sels, C.Van Beveren, E.Verstraelen, A.Welker, F.Wienholtz, R.N.Wolf, K.Zuber

Hyperfine anomaly in gold and magnetic moments of Iπ = 11/2- gold isomers

NUCLEAR MOMENTS 177m,191m,193m,195mAu; measured hyperfine structure spectra (hfs), hyperfine splitting, differential hyperfine anomaly, magnetic dipole moments using in-source laser resonance-ionization spectroscopy (RILIS) at CERN-ISOLDE. Mass separated Au beams were produced in U(p, X), E=1.4 GeV reaction, and delivered to either the ISOLTRAP Multi-Reflection Time-of-Flight Mass Spectrometer (MR-ToF MS) or the Windmill (WM) decay station. Comparison to the previously measured magnetic moments. 185,186,187,189,189m,191,193,194Au; re-evaluated previously measured magnetic dipole moments by properly accounting for the hyperfine anomaly.

doi: 10.1103/PhysRevC.101.034308
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2020BA29      Phys.Rev. C 101, 064321 (2020)

A.E.Barzakh, D.Atanasov, A.N.Andreyev, M.Al Monthery, N.A.Althubiti, B.Andel, S.Antalic, K.Blaum, T.E.Cocolios, J.G.Cubiss, P.Van Duppen, T.Day Goodacre, A.de Roubin, G.J.Farooq-Smith, D.V.Fedorov, V.N.Fedosseev, D.A.Fink, L.P.Gaffney, L.Ghys, R.D.Harding, M.Huyse, N.Imai, S.Kreim, D.Lunney, K.M.Lynch, V.Manea, B.A.Marsh, Y.Martinez Palenzuela, P.L.Molkanov, D.Neidherr, M.Rosenbusch, R.E.Rossel, S.Rothe, L.Schweikhard, M.D.Seliverstov, S.Sels, C.Van Beveren, E.Verstraelen, A.Welker, F.Wienholtz, R.N.Wolf, K.Zuber

Shape coexistence in 187Au studied by laser spectroscopy

NUCLEAR MOMENTS 187,187mAu; measured hyperfine-structure (hfs) spectrum, time-of-flight of the 9/2- isomer of 187Au using ISOLTRAP's multireflection time-of-flight mass separator (MR-ToF-MS) and resonance-ionization laser spectroscopy technique at CERN-ISOLDE. 187mAu; deduced hfs parameters, isotope shift, mean-square charge radius, magnetic moment, shape coexistence, Nilsson configuration. 187,187mAu produced in U(p, F), E=1.4 GeV reaction, and separated in mass-to-charge ratio using the General Purpose Separator (GPS) of ISOLDE. Systematics of changes in mean-square charge radii for A=183-199 Au isotopes. Systematics of magnetic moments of the 9/2-, πh9/2 states in Bi, Th, Au and Fr isotopes.

doi: 10.1103/PhysRevC.101.064321
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2020CU02      Phys.Rev. C 101, 014314 (2020)

J.G.Cubiss, R.D.Harding, A.N.Andreyev, N.Althubiti, B.Andel, S.Antalic, A.E.Barzakh, T.E.Cocolios, T.Day Goodacre, G.J.Farooq-Smith, D.V.Fedorov, V.N.Fedosseev, L.P.Gaffney, L.Ghys, M.Huyse, K.M.Lynch, B.A.Marsh, Y.Martinez Palenzuela, P.L.Molkanov, R.E.Rossel, S.Rothe, M.D.Seliverstov, S.Sels, P.Spagnoletti, C.Van Beveren, P.Van Duppen, M.Veinhard, E.Verstraelen, A.Zadvornaya

α-decay branching ratio of 180Pt

RADIOACTIVITY 180Pt(α)[from 180Hg to 180Au to 180Pt EC decay chain, 180Hg from Pb(p, X), E=1.4 GeV at ISOLDE-CERN, followed by a three-step, resonance laser ionization]; measured Eα, Iα; deduced α branching ratio, reduced α width for g.s. to g.s. transition. Comparison with earlier experimental results. 180Hg, 180Au, 176Pt, 172Os(α); measured Eα in the decay chains starting from 180Hg. Systematics of reduced α-decay widths for g.s. to g.s. α transitions in N(even)=88-112 Pt, N(even)=90-108 Hg and N(even)=96-112 Pb isotopes.

doi: 10.1103/PhysRevC.101.014314
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2020CU04      Phys.Rev. C 102, 044332 (2020)

J.G.Cubiss, A.N.Andreyev, A.E.Barzakh, V.Manea, M.Al Monthery, N.A.Althubiti, B.Andel, S.Antalic, D.Atanasov, K.Blaum, T.E.Cocolios, T.Day Goodacre, A.de Roubin, G.J.Farooq-Smith, D.V.Fedorov, V.N.Fedosseev, D.A.Fink, L.P.Gaffney, L.Ghys, R.D.Harding, F.Herfurth, M.Huyse, N.Imai, D.T.Joss, S.Kreim, D.Lunney, K.M.Lynch, B.A.Marsh, Y.Martinez Palenzuela, P.L.Molkanov, D.Neidherr, G.G.O'Neill, R.D.Page, M.Rosenbusch, R.E.Rossel, S.Rothe, L.Schweikhard, M.D.Seliverstov, S.Sels, A.Stott, C.Van Beveren, P.Van Duppen, E.Verstraelen, A.Welker, F.Wienholtz, R.N.Wolf, K.Zuber

Laser-assisted decay spectroscopy and mass spectrometry of 178Au

NUCLEAR MOMENTS 178,178mAu; measured hyperfine structure spectrum using multireflection time-of-flight mass spectrometer (MR-ToF MS) at CERN-ISOLDE; deduced spins based on hyperfine structure intensity patterns, magnetic dipole moments, Nilsson configurations.

ATOMIC MASSES 178,178mAu; measured cyclotron frequency using time-of-flight ion-cyclotron (TOF-ICR) technique using Penning-trap system of ISOLTRAP at CERN-ISOLDE; deduced mass excesses, and excitation energy of the isomer in 178Au.

RADIOACTIVITY 178,178mAu(α), (EC), (β+)[from U(p, X), E=1.4 GeV, followed by laser ionization and separation by mass-to-charge ratio using the GPS, then transported to Windmill (WM) system]; 178Pt(α)[from 178Au ϵ decay]; measured Eα, Iα, Eγ, Iγ, αγ-coin, α(x rays)-coin, half-lives of decays of 178Au and 178mAu using Si detectors for α particles and LEGe detector for γ rays. 178,178mAu; deduced branching ratios for α and ϵ decay modes, reduced α-decay widths, α-hindrance factors (HF), Nilsson configurations. 174,174mIr; deduced levels, J, total conversion coefficient for 56.8-keV transition in 174Ir, multipolarities, configurations, energy of the isomer. 174Ir(α)[from 178Au α decay]; measured αγ-coin. 170Re; deduced possible isomer in 170Re.

doi: 10.1103/PhysRevC.102.044332
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2020HA24      Phys.Rev. C 102, 024312 (2020)

R.D.Harding, A.N.Andreyev, A.E.Barzakh, D.Atanasov, J.G.Cubiss, P.Van Duppen, M.Al Monthery, N.A.Althubiti, B.Andel, S.Antalic, K.Blaum, T.E.Cocolios, T.Day Goodacre, A.de Roubin, G.J.Farooq-Smith, D.V.Fedorov, V.N.Fedosseev, D.A.Fink, L.P.Gaffney, L.Ghys, D.T.Joss, F.Herfurth, M.Huyse, N.Imai, S.Kreim, D.Lunney, K.M.Lynch, V.Manea, B.A.Marsh, Y.Martinez Palenzuela, P.L.Molkanov, D.Neidherr, R.D.Page, A.Pastore, M.Rosenbusch, R.E.Rossel, S.Rothe, L.Schweikhard, M.D.Seliverstov, S.Sels, C.Van Beveren, E.Verstraelen, A.Welker, F.Wienholtz, R.N.Wolf, K.Zuber

Laser-assisted decay spectroscopy for the ground states of 180, 182Au

NUCLEAR MOMENTS 180,182Au; measured hyperfine structure spectra, magnetic moments of the ground states using the ISOLTRAP Multi-Reflection Time-of-Flight Mass Spectrometer and laser spectroscopy at ISOLDE, CERN; deduced J, π, Nilsson configurations of ground states. Comparison with theoretical magnetic moments, and with previous experimental results. Laser-ionized and mass-separated 180,182Au isotopes formed in 238U(p, X), E=1.4 GeV spallation reaction.

RADIOACTIVITY 180Au(α), (β+)[from 238U(p, X), E=1.4 GeV, followed by separation using RILIS, General purpose separator (GPS) at ISOLDE-CERN]; measured Eα, Iα, Eγ, Iγ, I(x rays), αγ- and γγ-coin, half-life of 180Au decay. 176Ir; deduced levels, J, π, α-branching ratio, total conversion coefficients, multipolarities, α-hindrance factors.

doi: 10.1103/PhysRevC.102.024312
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2020MO10      Acta Phys.Pol. B51, 849 (2020)

P.Mosat, S.Antalic, F.P.Hessberger, D.Ackermann, B.Andel, M.Block, Z.Kalaninova, B.Kindler, M.Laatiaoui, B.Lommel, A.K.Mistry, J.Piot, M.Vostinar

Isomeric States in 255Rf, 256Rf and 257Rf

doi: 10.5506/APhysPolB.51.849
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2020MO11      Phys.Rev. C 101, 034310 (2020)

P.Mosat, F.P.Hessberger, S.Antalic, D.Ackermann, B.Andel, M.Block, S.Hofmann, Z.Kalaninova, B.Kindler, M.Laatiaoui, B.Lommel, A.K.Mistry, J.Piot, M.Vostinar

K isomerism in 255Rf and total kinetic energy measurements for spontaneous fission of 255, 256, 258Rf

RADIOACTIVITY 255,256RF(SF)[from 207,208Pb(50Ti, 2n), E=228.8, 238.3, 239.8 MeV]; 258Db(EC)[from 209Bi(50Ti, n), E=232.6 MeV]; 258Rf(SF)[from 258Db(EC)]; measured evaporation residues (ERs) using the velocity filter SHIP at GSI, spontaneous fission events using time and position correlations, (fragment)(fragment)-coin, total kinetic energy (TKE) distributions of SF fragments, half-lives of 255,256Rf decays from ER-SF correlated events, half-life of 258Rf decay from ce-SF correlated events, Eγ, Iγ, x rays, ce, γ(ce)-coin, K-isomers and their half-lives in 255Rf from ER-ce-SF/α and ER-ce-(ce)-SF/α correlated events using the STOP and BOX silicon strip detectors, and Ge clover detector at GSI; deduced tentative bimodal fission mode. 255Rf; deduced levels, J, π, two new high-K isomers and their Nilsson configurations; proposed level schemes of the isomers.

doi: 10.1103/PhysRevC.101.034310
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2019BA22      Phys.Rev. C 99, 054317 (2019)

A.E.Barzakh, J.G.Cubiss, A.N.Andreyev, M.D.Seliverstov, B.Andel, S.Antalic, P.Ascher, D.Atanasov, D.Beck, J.Bieron, K.Blaum, Ch.Borgmann, M.Breitenfeldt, L.Capponi, T.E.Cocolios, T.Day Goodacre, X.Derkx, H.De Witte, J.Elseviers, D.V.Fedorov, V.N.Fedosseev, S.Fritzsche, L.P.Gaffney, S.George, L.Ghys, F.P.Hessberger, M.Huyse, N.Imai, Z.Kalaninova, D.Kisler, U.Koster, M.Kowalska, S.Kreim, J.F.W.Lane, V.Liberati, D.Lunney, K.M.Lynch, V.Manea, B.A.Marsh, S.Mitsuoka, P.L.Molkanov, Y.Nagame, D.Neidherr, K.Nishio, S.Ota, D.Pauwels, L.Popescu, D.Radulov, E.Rapisarda, J.P.Revill, M.Rosenbusch, R.E.Rossel, S.Rothe, K.Sandhu, L.Schweikhard, S.Sels, V.L.Truesdale, C.Van Beveren, P.Van den Bergh, P.Van Duppen, Y.Wakabayashi, K.D.A.Wendt, F.Wienholtz, B.W.Whitmore, G.L.Wilson, R.N.Wolf, K.Zuber

Inverse odd-even staggering in nuclear charge radii and possible octupole collectivity in 217, 218, 219At revealed by in-source laser spectroscopy

NUCLEAR MOMENTS 217,218,219At; measured hyperfine structure spectra, isotopic shifts, and hyperfine splitting constants using in-source resonance-ionization technique at CERN-ISOLDE; deduced magnetic dipole and electric quadrupole moments, changes in nuclear mean-square charge radii, octupole collectivity. 217,218,219At isotopes produced in U(p, X), E=1.4 GeV reaction. Systematics of g factors in 209,211,213Bi, 211,217,219At, 213,219,221,223,225Fr, 215,217,227Ac, changes in rms charge radii for 207,208,209,210,211,217,218,219At, shell-effect parameters in Pb, Bi, Po, At, Rn, Fr, Ra, Ac isotopes, and odd-even staggering in 205,207,209,211Pb, 207,209,217Po, 208,210,218At, 210,212,220,222,224,226Fr, 219,221Rn, 221,223,225,227Ra.

doi: 10.1103/PhysRevC.99.054317
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2019CU02      Phys.Rev. C 99, 064317 (2019)

J.G.Cubiss, A.N.Andreyev, A.E.Barzakh, B.Andel, S.Antalic, T.E.Cocolios, T.Day Goodacre, D.V.Fedorov, V.N.Fedosseev, R.Ferrer, D.A.Fink, L.P.Gaffney, L.Ghys, M.Huyse, Z.Kalaninova, U.Koster, B.A.Marsh, P.L.Molkanov, R.E.Rossel, S.Rothe, M.D.Seliverstov, S.Sels, A.M.Sjodin, M.Stryjczyk, V.L.Truesdale, C.Van Beveren, P.Van Duppen, G.L.Wilson

Fine structure in the α decay of 218At

RADIOACTIVITY 218At(α)[from U(p, F), E=1.4 GeV, followed by selective ionization of 218At using RILIS at CERN-ISOLDE facility]; measured Eα, Iα, Eγ, Iγ, αγ-coin, half-life of 218At decay using silicon detectors for α detection and low-energy Ge detector for γ detection. 214Bi; deduced levels, J, π, α feedings, α hindrance factors. 218At; deduced J, π. Systematics of low-lying level energies in 210,212,214Bi, 212,214,216At, and α hindrance factors in the decays of 214,216,218At, 216Fr. Comparison with theoretical predictions, and with previous experimental results.

doi: 10.1103/PhysRevC.99.064317
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2019MI08      Nucl.Phys. A987, 337 (2019)

A.K.Mistry, J.Khuyagbaatar, F.P.Hessberger, D.Ackermann, B.Andel, S.Antalic, M.Block, P.Chhetri, F.Dechery, C.Droese, Ch.E.Dullmann, F.Giacoppo, J.Hoffmann, O.Kaleja, N.Kurz, M.Laatiaoui, L.Lens, J.Maurer, P.Mosat, J.Piot, S.Raeder, M.Vostinar, A.Yakushev, Z.Zhang

The 48Ca+181Ta reaction: Cross section studies and investigation of neutron-deficient 86 ≤ Z ≤ 93 isotopes

NUCLEAR REACTIONS 181Ta(48Ca, x)229Np, E(cm)=212, 217, 226 MeV[energies based on σ predictions by the HIVAP code]; measured xn, αxn, pxn leading to 225Np, 225U, 224Np, Evaporation Residues (ER) separated from 48Ca primary beam using the SHIP velocity filter at GSI, ToF and COMPAct Spectroscopy Set-up (COMPASS) comprising of DSSDs and SSSDs; deduced 225U, 225,226,229Np decay chains; 213Rn, 213,214,215Fr, 217,218,219Ac, 221Th, 221,222,223Pa, 225U, 225,226Np; deduced decay data, T1/2; compared with literature values; compiled production σ maxima in 3n and 4n evaporation channels from compound nuclei with Z=83-94 and projectiles 40Ar, 40,44,48Ca, 50Ti using published experimental data.

doi: 10.1016/j.nuclphysa.2019.05.003
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2019SE04      Phys.Rev. C 99, 044306 (2019)

S.Sels, T.Day Goodacre, B.A.Marsh, A.Pastore, W.Ryssens, Y.Tsunoda, N.Althubiti, B.Andel, A.N.Andreyev, D.Atanasov, A.E.Barzakh, M.Bender, J.Billowes, K.Blaum, T.E.Cocolios, J.G.Cubiss, J.Dobaczewski, G.J.Farooq-Smith, D.V.Fedorov, V.N.Fedosseev, K.T.Flanagan, L.P.Gaffney, L.Ghys, P.-H.Heenen, M.Huyse, S.Kreim, D.Lunney, K.M.Lynch, V.Manea, Y.Martinez Palenzuela, T.M.Medonca, P.L.Molkanov, T.Otsuka, J.P.Ramos, R.E.Rossel, S.Rothe, L.Schweikhard, M.D.Seliverstov, P.Spagnoletti, C.Van Beveren, P.Van Duppen, M.Veinhard, E.Verstraelen, A.Welker, K.Wendt, F.Wienholtz, R.N.Wolf, A.Zadvornaya

Shape staggering of midshell mercury isotopes from in-source laser spectroscopy compared with density-functional-theory and Monte Carlo shell-model calculations

NUCLEAR MOMENTS 177,178,179,180,181,182,183,184,185,185mHg; measured hyperfine structure (hfs) spectra, hyperfine coupling constants, isotope shifts, and rms charge radii using the in-source resonance-ionization spectroscopy method combined with decay spectroscopy, and Multi-Reflection Time-of-Flight Mass Spectrometer (MR-TOF MS) at CERN-ISOLDE facility; deduced magnetic dipole moments, and spectroscopic quadrupole moments, configurations. Comparison with theoretical calculations using density functional theory (DFT) with Skyrme parametrizations, and Monte Carlo shell model (MCSM). Ions of Hg activities produced in Pb(p, X), E=1.4 GeV, using molten lead target.

NUCLEAR REACTIONS Pb, U(p, X)177Hg/178Hg/179Hg/180Hg/181Hg/182Hg/183Hg/184Hg/185Hg/185mHg, E=1.4 GeV from PS-Booster synchrotron; measured production yields for different target-ion source configurations: VADLIS or RILIS at CERN-ISOLDE facility.

doi: 10.1103/PhysRevC.99.044306
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2019SV01      Phys.Part. and Nucl.Lett. 16, 768 (2019)

A.I.Svirikhin, A.V.Andreev, A.V.Yeremin, N.I.Zamyatin, I.N.Izosimov, A.V.Isaev, A.N.Kuznetsov, A.A.Kuznetsova, O.N.Malyshev, A.G.Popeko, Y.A.Popov, E.A.Sokol, M.S.Tezekbayeva, M.L.Chelnokov, V.I.Chepigin, T.M.Schneidman, B.Andel, S.Antalic, A.Bronis, P.Mosat, B.Gall, O.Dorvaux, B.M.Retailleau, K.Hauschild, A.Lopez-Martenz, P.Chauveau, E.Stefanova, D.Tonev

Prompt Neutrons from Spontaneous 254Rf Fission

doi: 10.1134/S1547477119060311
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2019VO03      Eur.Phys.J. A 55, 17 (2019)

M.Vostinar, F.P.Hessberger, D.Ackermann, B.Andel, S.Antalic, M.Block, Ch.Droese, J.Even, S.Heinz, Z.Kalaninova, I.Kojouharov, M.Laatiaoui, A.K.Mistry, J.Piot, H.Savajols

Alpha-gamma decay studies of 258Db and its (grand)daughter nuclei 254Lr and 250Md

NUCLEAR REACTIONS 209Bi(50Ti, n)258Db, E=236 MeV; measured (after separation of evaporation residues with kinetic energy 50 MeV by the SHIP velocity filter) emitted particles using position sensitive Si strip detector, six SSSDs arranged in a box surrounding the stop detector, Eγ, Iγ, X-rays using HPGe clover detector, subsequent α-decay and SF events, T1/2 using time difference between evaporation residues implantation and subsequent α-decay of the isotopes, 258Db α-decays αγ-coin, αX-rays coin; deduced α, γ transitions, levels, J, π. 250Md, 254Lr, 254No; deduced α-decays, levels, γ transitions, Qα systematics for 250Md. 254Lr, 258Db; deduced levels, J, π, possible single-particle states configurations.

doi: 10.1140/epja/i2019-12701-y
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2018AC08      Nucl.Instrum.Methods Phys.Res. A907, 81 (2018)

D.Ackermann, A.K.Mistry, F.P.Hessberger, B.Andel, S.Antalic, M.Block, L.Caceres, P.Chhetri, F.Dechery, Ch.Droese, Ch.E.Dullmann, F.Giacoppo, J.Hoffmann, O.Kaleja, O.Kamalou, N.Kurz, J.Khuyagbaatar, R.R.Mandl, T.Murbock, M.Laatiaoui, J.Maurer, P.Mosat, J.Piot, S.Raeder, H.Savajols, O.Sorlin, Ch.Stodel, J.C.Thomas, M.Vostinar, P.Wieczorek, A.Yakushev, Z.Zhang

COMPASS-A COMPAct decay spectroscopy set-up

RADIOACTIVITY 253No(α) [from 207Pb(48Ca, 2n), E not given]; measured decay products, Eγ, Iγ, Eα, Iα, α-γ-coin.; deduced α-decay spectrum, branching ratios.

doi: 10.1016/j.nima.2018.01.096
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2018CU02      Phys.Rev. C 97, 054327 (2018)

J.G.Cubiss, A.E.Barzakh, M.D.Seliverstov, A.N.Andreyev, B.Andel, S.Antalic, P.Ascher, D.Atanasov, D.Beck, J.Bieron, K.Blaum, Ch.Borgmann, M.Breitenfeldt, L.Capponi, T.E.Cocolios, T.Day Goodacre, X.Derkx, H.De Witte, J.Elseviers, D.V.Fedorov, V.N.Fedosseev, S.Fritzsche, L.P.Gaffney, S.George, L.Ghys, F.P.Hessberger, M.Huyse, N.Imai, Z.Kalaninova, D.Kisler, U.Koster, M.Kowalska, S.Kreim, J.F.W.Lane, V.Liberati, D.Lunney, K.M.Lynch, V.Manea, B.A.Marsh, S.Mitsuoka, P.L.Molkanov, Y.Nagame, D.Neidherr, K.Nishio, S.Ota, D.Pauwels, L.Popescu, D.Radulov, E.Rapisarda, J.P.Revill, M.Rosenbusch, R.E.Rossel, S.Rothe, K.Sandhu, L.Schweikhard, S.Sels, V.L.Truesdale, C.Van Beveren, P.Van den Bergh, Y.Wakabayashi, P.Van Duppen, K.D.A.Wendt, F.Wienholtz, B.W.Whitmore, G.L.Wilson, R.N.Wolf, K.Zuber

Charge radii and electromagnetic moments of 195-211At

NUCLEAR MOMENTS 195,195m,196,197,197m,198,198m,199,199m,200,200m,201,202,202m,203,204,205,206,207,208,209,210,211At; measured hfs spectra, hyperfine coupling constants, isotope shifts, and rms charge radii using the in-source resonance-ionization spectroscopy method, and Multi-Reflection Time-of-Flight Mass Spectrometer (MR-TOF MS) at CERN-ISOLDE; deduced magnetic dipole moments and spectroscopic quadrupole moments, configurations, and quadrupole deformation parameters. 206At; deduced J. Detailed systematics of magnetic dipole moments, spectroscopic quadrupole moments, deformations, and rms charge radii in Hg, Tl, Pb, Bi, Po, At, Fr, Ra and Ac nuclei. Comparison with theoretical calculations using multiconfiguration Dirac-Hartree-Fock (MCDHF) method.

NUCLEAR REACTIONS U(p, X)195At/195mAt/196At/197At/197mAt/198At/198mAt/199At/199mAt/200At/200m1At/200m2At/201At/202At/202mAt/203At/204At/205At/206At/207At/208At/209At/210At/211At, E=1.4 GeV; produced radioactive astatine isotopes by spallation reaction with beam from CERN PS Booster impinging on a thick UCx target, followed by injection into a hot cavity of the Resonance Ionization Laser Ion Source (RILIS), and ionization by a three-step photoionization scheme.

doi: 10.1103/PhysRevC.97.054327
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2018CU04      Phys.Lett. B 786, 355 (2018)

J.G.Cubiss, A.E.Barzakh, A.N.Andreyev, M.Al Monthery, N.Althubiti, B.Andel, S.Antalic, D.Atanasov, K.Blaum, T.E.Cocolios, T.Day Goodacre, R.P.de Groote, A.de Roubin, G.J.Farooq-Smith, D.V.Fedorov, V.N.Fedosseev, R.Ferrer, D.A.Fink, L.P.Gaffney, L.Ghys, A.Gredley, R.D.Harding, F.Herfurth, M.Huyse, N.Imai, D.T.Joss, U.Koster, S.Kreim, V.Liberati, D.Lunney, K.M.Lynch, V.Manea, B.A.Marsh, Y.Martinez Palenzuela, P.L.Molkanov, P.Mosat, D.Neidherr, G.G.O'Neill, R.D.Page, T.J.Procter, E.Rapisarda, M.Rosenbusch, S.Rothe, K.Sandhu, L.Schweikhard, M.D.Seliverstov, S.Sels, P.Spagnoletti, V.L.Truesdale, C.Van Beveren, P.Van Duppen, M.Veinhard, M.Venhart, M.Veselsky, F.Wearing, A.Welker, F.Wienholtz, R.N.Wolf, S.G.Zemlyanoy, K.Zuber

Change in structure between the I=1/2 states in 181Tl and 177, 179Au

RADIOACTIVITY 181Tl(α) [from U(p, X), E=1.4 GeV]; measured decay products, Eα, Iα; deduced α-decay branching ratio and T1/2. Comparison with available data.

NUCLEAR MOMENTS 177,179Au; measured frequencies; deduced hyperfine spectra, magnetic dipole moments, J assignments of the ground states.

doi: 10.1016/j.physletb.2018.10.005
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2018MI11      Acta Phys.Pol. B49, 613 (2018)

A.K.Mistry, Z.Zhang, F.P.Hessberger, D.Ackermann, B.Andel, S.Antalic, M.Block, P.Chhetri, F.Dechery, C.Droese, Ch.E.Dullmann, F.Giacoppo, J.Hoffmann, O.Kaleja, J.Khuyagbaatar, N.Kurz, M.Laatiaoui, J.Maurer, P.Mosat, J.Piot, S.Raeder, M.Vostinar, A.Yakushev

Decay Spectroscopy of Heavy Isotopes at SHIP Using the COMPASS Focal Plane Detection Set-up

RADIOACTIVITY 250Fm, 254No(α)[Nobelium from 48Ca(208Pb, 2n), E=4.55 MeV/nucleon]; measured Eα, Iα(time), αα-coin; deduced α-decay energy spectrum, Iα vs time, T1/2, αFmαNo correlation, T1/2. 222Th, 218Ra, 214Rn(α)[from α-decays 230Pu to 226U to 232Th to218Ra to 214Rn]; measured α-decay trace 222Th to 218Ra to n, Eα, Iα(time), αα-coin, αα-correlations; deduced summary of α-decay chains starting with 227U, 229Np, 229,230Pu using also literature references.

doi: 10.5506/aphyspolb.49.613
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2018MO20      Acta Phys.Pol. B49, 605 (2018)

P.Mosat, S.Antalic, F.P.Hessberger, D.Ackermann, B.Andel, M.Block, S.Hofmann, Z.Kalaninova, B.Kindler, I.Kojouharov, M.Laatiaoui, B.Lommel, A.K.Mistry, K.Nishio, J.Piot, B.Sulignano, M.Vostinar

Total Kinetic Energy Measurements for Spontaneous Fission of 255, 256, 258Rf

RADIOACTIVITY 255,256,258Rf(SF) [Rf isotopes produced in fusion-evaporation reactions]; measured fission fragments kinetic energy vs fragment implantation depth using STIP BOX coincidences and anticoincidences; deduced TKE.

doi: 10.5506/aphyspolb.49.605
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2018SV02      Bull.Rus.Acad.Sci.Phys. 82, 632 (2018)

A.I.Svirikhin, A.V.Yeremin, A.V.Andreev, I.N.Izosimov, A.V.Isaev, A.N.Kuznetsov, A.A.Kuznetsova, O.N.Malyshev, A.G.Popeko, Y.A.Popov, E.A.Sokol, M.L.Chelnokov, V.I.Chepigin, T.M.Schneidman, B.Gall, O.Dorvaux, P.Brione, K.Hauschild, A.Lopez-Martenz, K.Rezynkina, S.Mullins, P.Jones, P.Mosat, B.Andel, Z.Kalaninova, M.Z.Asfari, N.Yoshihiro, J.Piot, E.Stefanova, D.Tonev

Short-Lived Isotopes of Transfermium Elements: Studying Characteristics of Spontaneous Fissioning

RADIOACTIVITY 256Rf, 250,252No(SF)[reaction created]; calculated formation of isotopes vs energy; compared with data (short- and long-lived isomers separately).

COMPILATION 236,238,240,242,244Pu, 242,244,246,248,250Cm, 249Bk, 246,250,252,254Cf, 244,246,256,258Fm, 250,252No, 256Rf, 258,260Md, 268Db(SF); 250,250m,252No; compiled average number of emitted neutrons accompanying spontaneous fission vs TKE; calculated spontaneous fission fragments TKE; compared with data.

doi: 10.3103/S1062873818060308
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2017AN16      Phys.Rev. C 96, 054327 (2017)

B.Andel, A.N.Andreyev, S.Antalic, A.Barzakh, N.Bree, T.E.Cocolios, V.F.Comas, J.Diriken, J.Elseviers, D.V.Fedorov, V.N.Fedosseev, S.Franchoo, L.Ghys, J.A.Heredia, M.Huyse, O.Ivanov, U.Koster, V.Liberati, B.A.Marsh, K.Nishio, R.D.Page, N.Patronis, M.D.Seliverstov, I.Tsekhanovich, P.Van den Bergh, J.Van De Walle, P.Van Duppen, M.Venhart, S.Vermote, M.Veselsky, C.Wagemans

Detailed α-decay study of 180Tl

RADIOACTIVITY 180Tl(α)[from U(p, X), E=1.4 GeV using Resonance Ionization Laser Ion Source (RILIS) and HRS separator at ISOLDE-CERN facility]; measured Eα, Iα, Eγ, Iγ, E(x ray), I(x ray), αγ- and αγγ-coin. 176Au; deduced levels, α-decay branching ratios, reduced α-widths, total and K-conversion coefficients, multipolarities, configurations, population of only the low-spin activity in 176Au from 180Tl α decay. Comparison with previous experimental data. Systematics of α-reduced widths in α-decays of 178,180,182,184Tl. 180Hg(α)[from 180Tl ϵ decay]; 176Au(α)[from 180Tl α decay]; 176Pt(α)[from 180Hg α decay]; measured Eα, Eγ, αγ-coin. 172Ir; deduced level, low-spin activity in 172Ir populated by 176Au α decay.

doi: 10.1103/PhysRevC.96.054327
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2017WI13      Phys.Rev. C 96, 044315 (2017)

G.L.Wilson, M.Takeyama, A.N.Andreyev, B.Andel, S.Antalic, W.N.Catford, L.Ghys, H.Haba, F.P.Hessberger, M.Huang, D.Kaji, Z.Kalaninova, K.Morimoto, K.Morita, M.Murakami, K.Nishio, R.Orlandi, A.G.Smith, K.Tanaka, Y.Wakabayashi, S.Yamaki

β-delayed fission of 230Am

RADIOACTIVITY 230Am(β+F)[from 207Pb(27Al, 4n), E=145 MeV]; measured fission fragments, double-fold fission fragment coincidences, total energy spectrum, α-α correlations using the GARIS recoil-ion separator at RIKEN. Analyzed TKE(230Pu); deduced T1/2 for 230Am, lower limit of β-delayed fission probability of 230Am. Systematics of β+-delayed fission probabilities for 230,232,234Am, 240,242,244,246,248Es, 236,238,240Bk nuclei. 230Am found to have the highest lower limit for β+-delayed fission probability so far among all the known nuclei decaying by this mode.

doi: 10.1103/PhysRevC.96.044315
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2016AN10      Phys.Rev. C 93, 064316 (2016)

B.Andel, A.N.Andreyev, S.Antalic, F.P.Hessberger, D.Ackermann, S.Hofmann, M.Huyse, Z.Kalaninova, B.Kindler, I.Kojouharov, P.Kuusiniemi, B.Lommel, K.Nishio, R.D.Page, B.Sulignano, P.Van Duppen

Short-lived isomers in 192Po and 194Po

NUCLEAR REACTIONS 141Pr(56Fe, 2np), E=259 MeV; 144Sm(51V, 2np), E=235 MeV; measured reaction products, Eγ, Iγ, γγ-coin, cross sections, half-lives of isomers by (ER)γα and (ER)γγα correlations using SHIP focal plane detectors at GSI. 192,194Po; deduced levels, J, π, energies of isomeric state, multipolarity, B(E1) and B(E3) values for 192Po. Discussed systematics of 11- isomers, B(E1) and B(E3) values in even-A Po and Pb isotopes.

doi: 10.1103/PhysRevC.93.064316
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2016HE08      Eur.Phys.J. A 52, 192 (2016)

F.P.Hessberger, S.Antalic, A.K.Mistry, D.Ackermann, B.Andel, M.Block, Z.Kalaninova, B.Kindler, I.Kojouharov, M.Laatiaoui, M.Laatiaoui, B.Lommel, J.Piot, M.Vostinar

Alpha- and EC-decay measurements of 257Rf

RADIOACTIVITY 257Rf(α), (EC); measured Eα, Iα, Eγ, Iγ, γα-coin, γα delayed coin, γα correlations, conversion electrons, X-rays using Ge clover detector for γ, ADC, TAC. 257Rf deduced enhanced α-decay scheme, new transition from 70 keV level to 724 level in 253No, possible EC-decay scheme. 253No deduced levels, new E1 γ transition from 724 keV to 167 keV level. 257Lr deduced T1/2. Experimental levels in 245Pu, 247Cm, 249Cf, 251Fm, 253No, 255Rf compared with published calculations for the same nuclei (plus 257Sg).

doi: 10.1140/epja/i2016-16192-0
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2016HE15      Eur.Phys.J. A 52, 328 (2016)

F.P.Hessberger, S.Antalic, D.Ackermann, B.Andel, M.Block, Z.Kalaninova, B.Kindler, I.Kojouharov, M.Laatiaoui, B.Lommel, A.K.Mistry, J.Piot, M.Vostinar

Investigation of electron capture decay of 258Db and α decay of 258Rf

RADIOACTIVITY 258Db(EC), 258Rf(α), (SF); measured 258Db K-shell X-rays, Eγ, Iγ(t), CE, (X-ray)(CE)-coin; measured 258Rf spontaneous fission, Eα, Iα; measured delayed coin between 258Db and 258Rf decays; deduced isomeric states, T1/2; deduced 258Rf α branch decay, α branching ratio, mass excess using 254No mass excess. Halflives compared with those measured by different types of correlation, mass excess compared with systematics for e-e nuclei.

doi: 10.1140/epja/i2016-16328-2
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2016SV02      Phys.Part. and Nucl.Lett. 13, 480 (2016)

A.I.Svirikhin, A.V.Yeremin, I.N.Izosimov, A.V.Isaev, A.N.Kuznetsov, O.N.Malyshev, A.G.Popeko, Yu.A.Popov, E.A.Sokol, M.L.Chelnokov, V.I.Chepigin, B.Andel, M.Z.Asfari, B.Gall, N.Yoshihiro, Z.Kalaninova, S.Mullins, J.Piot, E.Stefanova, D.Tonev

Spontaneous fission of 256Rf, new data

RADIOACTIVITY 256Rf(SF)[from 208Pb(50Ti, 2n), E=237 MeV]; measured nuclei, Eα, Iα, fission fragments, En, In; deduced fission neutron multiplicity, spontaneous fission T1/2.

COMPILATION A=236-268; compiled spontaneous fission neutron multiplicity vs mass number.

doi: 10.1134/S1547477116040129
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2016TR07      Phys.Rev. C 94, 034308 (2016)

V.L.Truesdale, A.N.Andreyev, L.Ghys, M.Huyse, P.Van Duppen, S.Sels, B.Andel, S.Antalic, A.Barzakh, L.Capponi, T.E.Cocolios, X.Derkx, H.De Witte, J.Elseviers, D.V.Fedorov, V.N.Fedosseev, F.P.Hessberger, Z.Kalaninova, U.Koster, J.F.W.Lane, V.Liberati, K.M.Lynch, B.A.Marsh, S.Mitsuoka, Y.Nagame, K.Nishio, S.Ota, D.Pauwels, L.Popescu, D.Radulov, E.Rapisarda, S.Rothe, K.Sandhu, M.D.Seliverstov, A.M.Sjodin, C.Van Beveren, P.Van den Bergh, Y.Wakabayashi

β-delayed fission and α decay of 196At

RADIOACTIVITY 196At, 196Po(α); 196At(EC), (β+), (β+F), [high purity 196At beam from U(p, X), E=1.4 GeV using HRS and GPS separators with RILIS at ISOLDE-CERN facility]; measured Eα, Iα, Eγ, Iγ, αγ-coin, fission-fragment energies, (fission fragment)(fission fragment)-coin, half-lives of decays of 196At and 196Po; deduced α- and β-decay and β-delayed fission branching ratios of 196At, reduced α-decay widths, symmetric and asymmetric fission-fragment mass distributions of the daughter isotope 196Po. 192Bi; deduced levels, J, π, conversion coefficients, multipolarities, mixing ratio, configurations. Comparison with previous experimental values. 192Bi, 199,200,201At, 202Rn; observed α from daughter activity 192Bi and other contaminants.

doi: 10.1103/PhysRevC.94.034308
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2015KA24      Phys.Rev. C 92, 014321 (2015)

Z.Kalaninova, S.Antalic, F.P.Hessberger, D.Ackermann, B.Andel, B.Kindler, M.Laatiaoui, B.Lommel, J.Maurer

Levels in 223Th populated by α decay of 227U

RADIOACTIVITY 227U(α)[from 208Pb(22Ne, 3n), E=104 MeV]; measured reaction products, Eα, Iα, Eγ, Iγ, αγ-coin, αα-correlations at GSI facility. 223Th; deduced levels, J, π, α feedings, α hindrance factors, conversion coefficients, multipolarities. Monte Carlo simulation of α spectrum using GEANT4 code.

doi: 10.1103/PhysRevC.92.014321
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2014GH09      Phys.Rev. C 90, 041301 (2014)

L.Ghys, A.N.Andreyev, M.Huyse, P.Van Duppen, S.Sels, B.Andel, S.Antalic, A.Barzakh, L.Capponi, T.E.Cocolios, X.Derkx, H.De Witte, J.Elseviers, D.V.Fedorov, V.N.Fedosseev, F.P.Hessberger, Z.Kalaninova, U.Koster, J.F.W.Lane, V.Liberati, K.M.Lynch, B.A.Marsh, S.Mitsuoka, P.Moller, Y.Nagame, K.Nishio, S.Ota, D.Pauwels, R.D.Page, L.Popescu, D.Radulov, M.M.Rajabali, J.Randrup, E.Rapisarda, S.Rothe, K.Sandhu, M.D.Seliverstov, A.M.Sjodin, V.L.Truesdale, C.Van Beveren, P.Van den Bergh, Y.Wakabayashi, M.Warda

Evolution of fission-fragment mass distributions in the neutron-deficient lead region

RADIOACTIVITY 194,196At, 200,202Fr(β+F)[from U(p, X), E=1.4 GeV at CERN-ISOLDE using HRS and GPS separators]; measured mass and energy distributions of coincident fission fragments after β-delayed fission, ratio of α to β-delayed-fission decays, total kinetic energy. 196At, 200Fr; deduced β-delayed fission decay probabilities, new region of multimodal fission in the neutron-deficient lead region. 196Po; Calculated potential energy surface contour. Comparison with Finite-range liquid-drop (FRLDM) and Hartree-Fock-Bogoliubov (HFB) model calculations. Comparison with experimental results for β-delayed fission of 180Tl.

doi: 10.1103/PhysRevC.90.041301
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2014KA23      Phys.Rev. C 89, 054312 (2014)

Z.Kalaninova, S.Antalic, A.N.Andreyev, F.P.Hessberger, D.Ackermann, B.Andel, L.Bianco, S.Hofmann, M.Huyse, B.Kindler, B.Lommel, R.Mann, R.D.Page, P.J.Sapple, J.Thomson, P.Van Duppen, M.Venhart

Decay of 201-203Ra and 200-202Fr

RADIOACTIVITY 200,201,201m,202,202mFr, 201,201m,202,203,203mRa(α)[from 147,149Sm(56Fe, X), E=236-275 MeV]; 198,199,199mRn, 196,197,197mAt, 198,198mAt, 194Po(α)[daughters of Fr and Ra α decay chains]; measured Eα, Iα, γα-coin, Eγ, Iγ, (evaporation residues)α and α12, ER-fission correlations, half-lives using SHIP separator at GSI; deduced level energies of some of the isomers, Q(α), α branching ratios for some activities, reduced widths from Rasmussen prescription. 200,201Fr; deduced new micro-sec isomers from γ-ray and x-ray data, half-lives. 200Fr; deduced evidence for beta-delayed fission from Er-fission correlated events. Comparison with previous experimental data. Systematics of Q(α) and reduced α widths in N=102-140 Po, Rn and Ra isotopes. Systematics of single-particle levels in N=104-126 Fr, At and Bi isotopes.

doi: 10.1103/PhysRevC.89.054312
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2013KA16      Phys.Rev. C 87, 044335 (2013)

Z.Kalaninova, A.N.Andreyev, S.Antalic, F.P.Hessberger, D.Ackermann, B.Andel, M.C.Drummond, S.Hofmann, M.Huyse, B.Kindler, J.F.W.Lane, V.Liberati, B.Lommel, R.D.Page, E.Rapisarda, K.Sandhu, S.Saro, A.Thornthwaite, P.Van Duppen

α decay of the very neutron-deficient isotopes 197-199Fr

NUCLEAR REACTIONS 141Pr(60Ni, xn)197Fr/198Fr/199Fr, E=262-300 MeV; measured Eα, Eγ, (ER)α-, αα-correlations, time-of-flight, production σ using SHIP at GSI facility.

RADIOACTIVITY 197,198,199Fr(α)[from 141Pr(60Ni, X), E=262-300 MeV]; measured Eγ, Iγ, Eα, (ER)α-, αα-, αγ-coin, T1/2 using SHIP at GSI facility. 193,194,195At, 189,190,191Bi(α)[from α decay of 197,198,199Fr parents]; measured Eα, half-lives, αα correlations. 197,198,199Fr, 193,194,195At, 189,190Bi, 185Tl; deduced levels, J, π, isomers, configurations, reduced α-decay width. 197,198,199Rn, 197At, 193,194,195,196Po(α); observed α peaks in spectra. Systematics of α-decay reduced widths for 1/2+ to 1/2+, 7/2- to 7/2-, and 9/2- to 9/2- α transitions in N=105-135, odd-A At, Fe and even-A Rn isotopes.

doi: 10.1103/PhysRevC.87.044335
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