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NSR database version of April 25, 2024.

Search: Author = C.J.Chiara

Found 205 matches.

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2023BH05      Phys.Rev. C 108, 024312 (2023)

Soumi.Bhattacharya, V.Tripathi, S.L.Tabor, A.Volya, P.C.Bender, C.Benetti, M.P.Carpenter, J.J.Carroll, A.Chester, C.J.Chiara, K.Childers, B.R.Clark, B.P.Crider, J.T.Harke, R.Jain, S.N.Liddick, R.S.Lubna, S.Luitel, B.Longfellow, M.J.Mogannam, T.H.Ogunbeku, J.Perello, A.L.Richard, E.Rubino, S.Saha, O.A.Shehu, R.Unz, Y.Xiao, Y.Zhu

β^- decay of neutron-rich ⁴⁵Cl located at the magic number N=28

RADIOACTIVITY ⁴⁵Cl(β^-), (β^-n)[from Be(⁴⁸Ca, X), E=140 MeV/nucleon]; measured Eγ, Iγ, Eβ, Iβ, βγ-coin; deduced T_1/2, Q values, β-feedings, branchings; calculated logft. ^44,45Ar; deduced levels, J, π. Comparison to shell-model calculations with FSU interaction. Systematics of the first excited 2⁺ state energy for the even-A Ar isotopes (from N= 20 to 30). Beta Counting System (BCS) equipped with a 986 υm thick pixelated (40 strips x 40 strips) DSSD detector, followed by SSCD and surrounded by 16 Clover detectors at NSCL.

NUCLEAR STRUCTURE ^43,44,45Ar; calculated levels, J, π, B(M1), B(E2), proton and neutron occupation numbers. Shell-model calculations with FSU interaction. Comparison to experimental data.

doi: 10.1103/PhysRevC.108.024312
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2023CR03      Nucl.Instrum.Methods Phys.Res. A1055, 168525 (2023)

B.P.Crider, C.J.Prokop, S.N.Liddick, H.M.Albers, M.Alshudifat, A.D.Ayangeakaa, M.P.Carpenter, J.J.Carroll, J.Chen, C.J.Chiara, A.C.Dombos, S.Go, R.Grzywacz, J.Harker, R.V.F.Janssens, N.Larson, T.Lauritsen, R.Lewis, S.J.Quinn, F.Recchia, D.Seweryniak, A.Spyrou, S.Suchyta, W.B.Walters, S.Zhu

New method for level-lifetime measurements with thick scintillators

NUCLEAR REACTIONS ⁹Be(⁷⁶Ge, X)⁶⁸Ni/⁶⁸Zn/⁶⁹Ni/⁷⁰Ni, E=140 MeV/nucleon; measured reaction products, Eγ, Iγ, Eβ, Iβ, βγ-coin.; deduced γ-ray energies, level T_1/2. Comparison with available data. The National Superconducting Cyclotron Laboratory (NSCL), the coupled cyclotron facility.

doi: 10.1016/j.nima.2023.168525
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2023RZ02      Phys.Rev. C 108, L031302 (2023)

J.Rzadkiewicz, K.Slabkowska, M.Polasik, L.Syrocki, J.J.Carroll, C.J.Chiara

^93mMo isomer depletion via nuclear excitation by electron capture in resonant transfer into highly excited open-shell atomic states

doi: 10.1103/PhysRevC.108.L031302
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2023SI08      Phys.Rev. C 107, 054305 (2023)

J.Simpson, M.A.Riley, A.Pipidis, E.S.Paul, X.Wang, P.J.Nolan, J.F.Sharpey-Schafer, A.Aguilar, D.E.Appelbe, A.D.Ayangeakaa, A.J.Boston, H.C.Boston, D.B.Campbell, M.P.Carpenter, C.J.Chiara, P.T.W.Choy, R.M.Clark, M.Cromaz, A.O.Evans, P.Fallon, U.Garg, A.Gorgen, D.J.Hartley, R.V.F.Janssens, D.T.Joss, D.S.Judson, F.G.Kondev, T.Lauritsen, I.Y.Lee, A.O.Macchiavelli, J.T.Matta, J.Ollier, M.Petri, J.P.Revill, L.L.Riedinger, S.V.Rigby, C.Teal, P.J.Twin, C.Unsworth, D.Ward, S.Zhu, I.Ragnarsson

Evolution of structure and shapes in ¹⁵⁸Er to ultrahigh spin

NUCLEAR REACTIONS ¹¹⁴Cd(⁴⁸Ca, 4n)¹⁵⁸Er, E=215 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ). ¹⁵⁸Er; deduced levels, J, π, high-spin states, angular intensity ratios, δ, B(M1/E2) ratios, nuclear shapes, alignments, rotational bands, configurations, band terminating states and feeding, transition quadrupole moments for triaxial strongly deformed bands, moment of inertia. Comparison with cranked Nilsson-Strutinski calculations. Systematics of triaxial strongly deformed bands in ¹⁵⁸Er, ¹⁶⁰Er, ¹⁵²Dy, ¹⁶³Lu. Gammasphere array of escape-suppressed HPGe detectors at 88-inch cyclotron-LBNL and ATLAS-ANL facilities.

doi: 10.1103/PhysRevC.107.054305
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2022CH09      Phys.Rev. C 105, 024319 (2022)

A.Chester, B.A.Brown, S.P.Burcher, M.P.Carpenter, J.J.Carroll, C.J.Chiara, P.A.Copp, B.P.Crider, J.T.Harke, D.E.M.Hoff, K.Kolos, S.N.Liddick, B.Longfellow, M.J.Mogannam, T.H.Ogunbeku, C.J.Prokop, D.Rhodes, A.L.Richard, O.A.Shehu, A.S.Tamashiro, R.Unz, Y.Xiao

Half-life measurement of the 199-keV isomeric state in ⁷⁶Ga

RADIOACTIVITY ⁷⁶Zn(β^-)[from ⁷⁶Cu β^- formed in ⁹Be(⁸⁶Kr, X), E=140 MeV/nucleon]; ⁷⁶Ga(IT)[from ⁷⁶Zn(β^-)]; measured Eβ, Iβ, Eγ, Iγ, βγ-coin. ⁷⁶Ga; deduced levels J, π, transition strength, T_1/2 of the 199-keV isomeric transition from time difference between pulses produced by β-decay populating the isomeric state and γ from the decay of the isomer. Systematics of low-lying levels in ^{72,74,76,78,80}Ga. Beam implantation in CeBr detector (NSCL-MSU ).

NUCLEAR STRUCTURE ⁷⁶Ga; calculated levels, J, π, transition strength. Shell model calculations in the jj44 model space with the jun45, jj44b, and jj44c Hamiltonians.

doi: 10.1103/PhysRevC.105.024319
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2022JA13      Phys.Rev. C 106, 044303 (2022)

L.Janiak, M.Gierlik, G.Madejowski, R.Prokopowicz, S.Wronka, J.Rzadkiewicz, J.J.Carroll, C.J.Chiara

Half-life of the 188-keV isomer of ¹⁸⁴Re

RADIOACTIVITY ¹⁸⁴Re(IT), (EC)[from Re(n, γ), E=thermal]; ⁶⁰Co, ¹³⁴Cs, ¹⁸⁶Re(β^-); measured Eγ, Iγ, T_1/2 of decays of ¹⁸⁴Re isomer and ¹³⁴Cs g.s. by γ-decay curves, with reference to activities and half-lives of decays of ⁶⁰Co and ¹⁸⁶Re ground states; deduced T_1/2 of ¹⁸⁴Re isomer with improved precision by two orders of magnitude as compared to the literature value.

doi: 10.1103/PhysRevC.106.044303
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Data from this article have been entered in the XUNDL database. For more information, click here.

2022LO05      Phys.Rev. C 105, L042801 (2022)

G.Lotay, D.T.Doherty, R.V.F.Janssens, D.Seweryniak, H.M.Albers, S.Almaraz-Calderon, M.P.Carpenter, A.E.Champagne, C.J.Chiara, C.R.Hoffman, C.Iliadis, A.Kankainen, T.Lauritsen, S.Zhu

Revised decay properties of the key 93-keV resonance in the ²⁵Mg(p, γ) reaction and its influence on the MgAl cycle in astrophysical environments

NUCLEAR REACTIONS ¹¹B(¹⁶O, n), E=19 MeV; measured Eγ, Iγ, γ(θ), γγγ-coin. ²⁶Al; deduced levels J, π, branchings. Obtained ground state branching for 93-keV resonance of ²⁵Mg+p system which corresponds to 6398 keV level in ²⁶Al. Comparison to other experimental data. Discussed impact on the production of cosmic γ rays. Gammasphere array with 99 detectors at ATLAS accelerator (ANL).

doi: 10.1103/PhysRevC.105.L042801
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2022SA20      Phys.Lett. B 829, 137059 (2022)

M.Saxena, W.-J.Ong, Z.Meisel, D.E.M.Hoff, N.Smirnova, P.C.Bender, S.P.Burcher, M.P.Carpenter, J.J.Carroll, A.Chester, C.J.Chiara, R.Conaway, P.A.Copp, B.P.Crider, J.Derkin, A.Estrae, G.Hamad, J.T.Harke, R.Jain, H.Jayatissa, S.N.Liddick, B.Longfellow, M.Mogannam, F.Montes, N.Nepal, T.H.Ogunbeku, A.L.Richard, H.Schatz, D.Soltesz, S.K.Subedi, I.Sultana, A.S.Tamashiro, V.Tripathi, Y.Xiao, R.Zink

⁵⁷Zn β-delayed proton emission establishes the ⁵⁶Ni rp-process waiting point bypass

RADIOACTIVITY ⁵⁷Zn(β⁺p), (β⁺) [from ⁹Be(⁷⁸Kr, X)⁵⁷Zn, E=150 MeV/nucleon]; measured decay products, Eγ, Iγ, Eβ, Iβ, Ep, Ip; deduced T_1/2, βp branching ratio, β-γ-p decay mode transitions. The Coupled Cyclotron Facility of NSCL.

doi: 10.1016/j.physletb.2022.137059
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2022TR03      Phys.Rev. C 106, 064314 (2022)

V.Tripathi, S.Bhattacharya, E.Rubino, C.Benetti, J.F.Perello, S.L.Tabor, S.N.Liddick, P.C.Bender, M.P.Carpenter, J.J.Carroll, A.Chester, C.J.Chiara, K.Childers, B.R.Clark, B.P.Crider, J.T.Harke, B.Longfellow, R.S.Lubna, S.Luitel, T.H.Ogunbeku, A.L.Richard, S.Saha, N.Shimizu, O.A.Shehu, Y.Utsuno, R.Unz, Y.Xiao, S.Yoshida, Y.Zhu

β^- decay of exotic P and S isotopes with neutron number near 28

RADIOACTIVITY ^42,43,44P, ^44,46S(β^-), (β^-n) [from Be(⁴⁸Ca, X), E=140 MeV/nucleon)]; ⁴¹S(β^-) [from ⁴²P(β^-n]; measured Iβ, Eγ, Iγ, βγ-coin, (implant)γ-coin; deduced T_1/2, logft, delayed neutron emission probabilities. ⁴²P; deduced J, π of the ground state. ^42,41S, ⁴¹Cl; deduced levels, J, π, transition intensities. The half-lives were extracted from the fitting of decay curves. Comparison to calculations performed with shell-model using SDPFSDG-MU interaction. Beta Counting System (BCS) - 40x40 DSSD as the implant and β detector, surrounded by a γ-array of 16 Clover detectors in close geometry (NSCL).

doi: 10.1103/PhysRevC.106.064314
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2021CA19      Phys.Rev. C 104, L022802 (2021)

L.Canete, G.Lotay, G.Christian, D.T.Doherty, W.N.Catford, S.Hallam, D.Seweryniak, H.M.Albers, S.Almaraz-Calderon, E.A.Bennett, M.P.Carpenter, C.J.Chiara, J.P.Greene, C.R.Hoffman, R.V.F.Janssens, J.Jose, A.Kankainen, T.Lauritsen, A.Matta, M.Moukaddam, S.Ota, A.Saastamoinen, R.Wilkinson, S.Zhu

New constraints on the ²⁵Al (p, γ) reaction and its influence on the flux of cosmic γ rays from classical nova explosions

NUCLEAR REACTIONS ¹¹B(¹⁶O, p)²⁶Mg, E=19 MeV from Argonne ATLAS accelerator; measured Eγ, Iγ, γγ-coin, γ(θ) and level half-lives by DSAM using Gammasphere array of 99 HPGe detectors. ²H(²⁵Mg, p)²⁶Mg, E=10 MeV/nucleon from Texas A and M cyclotron; measured outgoing protons and scattered deuterons using the TIARA Si array, and ²⁶Mg recoils by the MDM-2 magnetic spectrometer with Oxford ionization chamber, angular distributions of scattered deuterons and protons. ²⁶Mg; deduced levels, J, π, resonances, spectroscopic factors. ²⁶Si; deduced levels, resonances, J, π, Γ_p, Γ_γ, resonance strengths by comparing with the level structures of mirror nucleus ²⁶Mg. ²⁵Al(p, γ)²⁶Si, T=0.2-0.4 GK; deduced stellar reaction rate by considering the contribution of resonant states in ²⁶Si, galactic abundance of ²⁶Al from classical novae; performed nova outburst simulations using the hydrodynamic Lagrangian time-implicit code SHIVA.

doi: 10.1103/PhysRevC.104.L022802
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2658. Data from this article have been entered in the XUNDL database. For more information, click here.

2021CH56      Phys.Rev. C 104, 054314 (2021)

A.Chester, B.A.Brown, S.P.Burcher, M.P.Carpenter, J.J.Carroll, C.J.Chiara, P.A.Copp, B.P.Crider, J.T.Harke, D.E.M.Hoff, K.Kolos, S.N.Liddick, B.Longfellow, M.J.Mogannam, T.H.Ogunbeku, C.J.Prokop, D.Rhodes, A.L.Richard, O.A.Shehu, A.S.Tamashiro, R.Unz, Y.Xiao

Identification of a new isomeric state in ⁷⁶Zn following the β decay of ⁷⁶Cu

RADIOACTIVITY ⁷⁶Cu(β^-)[from ⁹Be(⁸⁶Kr, X), E=140 MeV/nucleon, followed by separation of fragments of interest using A1900 fragment separator at NSCL-MSU facility]; measured reaction products, particle identification plot of ions implanted in CeBr₃ detector, Eγ, Iγ, (⁷⁶Cu implants)γ-coin, γγ-coin, T_1/2 of a nanosecond isomer by fast timing method using an array of 16 HPGe clover detectors and 15 LaBr₃ detectors. ⁷⁶Zn; deduced levels, J, π, new isomer, Comparison with shell-model calculations.

NUCLEAR STRUCTURE ⁷⁶Zn; calculated levels, J, π, level T_1/2, isomers, proton and neutron occupancy numbers of negative-parity isomeric states using shell model with jj4b, jj4c and JUN45 interactions. Comparison with experimental data.

doi: 10.1103/PhysRevC.104.054314
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2021KA05      Phys.Lett. B 813, 136033 (2021)

A.Kankainen, P.J.Woods, D.T.Doherty, H.M.Albers, M.Albers, A.D.Ayangeakaa, M.P.Carpenter, C.J.Chiara, J.L.Harker, R.V.F.Janssens, C.Lederer-Woods, D.Seweryniak, F.Strieder, S.Zhu

Decay of the key 92-keV resonance in the ²⁵Mg(p, γ) reaction to the ground and isomeric states of the cosmic γ-ray emitter ²⁶Al

NUCLEAR REACTIONS ²⁴Mg(³He, p), E=10 MeV; measured reaction products, Eγ, Iγ, γ-γ-coin.; deduced γ-ray energies and intensities, γ-ray branches, J, π.

doi: 10.1016/j.physletb.2020.136033
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2632. Data from this article have been entered in the XUNDL database. For more information, click here.

2021PR11      Phys.Rev. C 104, 044318 (2021)

V.S.Prasher, A.J.Mitchell, C.J.Lister, P.Chowdhury, L.Afanasieva, M.Albers, C.J.Chiara, M.P.Carpenter, D.Cline, N.D'Olympia, C.J.Guess, A.B.Hayes, C.R.Hoffman, R.V.F.Janssens, B.P.Kay, T.L.Khoo, A.Korichi, T.Lauritsen, E.Merchan, Y.Qiu, D.Seweryniak, R.Shearman, S.K.Tandel, A.Verras, C.Y.Wu, S.Zhu

Shapes, softness, and nonyrast collectivity in ¹⁸⁶W

NUCLEAR REACTIONS ¹⁸⁶W(¹³⁶Xe, ¹³⁶Xe')¹⁸⁶W, E=725, 800 MeV from ATLAS-ANL facility; measured scattered beam- and target-like ions using Rochester-Livermore 4π CHICO2 array, Eγ, Iγ, γγ- and (particle)γ-coin, gγ(θ)(DCO) using Gammasphere array. ¹⁸⁶W; deduced high-spin levels, J, π, Kπ, multipolarities, rotational bands, odd-even staggering parameters S(J) for bands and compared with predictions for an axially symmetric rotor, a rigid asymmetric rotor and a γ-unstable nucleus, B(E1) ratios. Systematics of E(first 2+), E(first 4+)/E(first 2+), E(second 2+)/E(first 2+), E(second 0+)/E(first 2+) for A=178-188 even-A W isotopes, and staggering parameters for ^{178,180,182,184,186,188}W, ^178,180Hf, ¹⁸⁸Os.

doi: 10.1103/PhysRevC.104.044318
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Data from this article have been entered in the XUNDL database. For more information, click here.

2021RZ01      Phys.Rev.Lett. 127, 042501 (2021)

J.Rzadkiewicz, M.Polasik, K.Slabkowska, L.Syrocki, J.J.Carroll, C.J.Chiara

Novel Approach to ^93mMo Isomer Depletion: Nuclear Excitation by Electron Capture in Resonant Transfer Process

RADIOACTIVITY ⁹³Mo(IT), (EC); analyzed available data; deduced partial and total probabilities for isomer depletion.

doi: 10.1103/PhysRevLett.127.042501
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2021SE17      Phys.Rev. C 104, 024317 (2021)

S.Sekal, L.M.Fraile, R.Lica, M.J.G.Borge, W.B.Walters, A.Aprahamian, C.Benchouk, C.Bernards, J.A.Briz, B.Bucher, C.J.Chiara, Z.Dlouhy, I.Gheorghe, D.G.Ghita, P.Hoff, J.Jolie, U.Koster, W.Kurcewicz, H.Mach, N.Marginean, R.Marginean, Z.Meliani, B.Olaizola, V.Paziy, J.M.Regis, M.Rudigier, T.Sava, G.S.Simpson, M.Stanoiu, L.Stroe

Low-spin states in ⁸⁰Ge populated in the β decay of the ⁸⁰Ga 3^- isomer

RADIOACTIVITY ^80mGa(β^-)[from decay of ⁸⁰Zn produced in U(n, F), E=fast neutrons at the ISOLDE-CERN facility, followed by separation of fission fragments passed using the ISOLDE Resonance Ionization Laser Ion Source (RILIS) and high-resolution magnetic separator]; measured Eγ, Iγ, βγ- and γγ-coin using two HPGe detectors for γ rays and an NE111A organic plastic scintillator for β detection. ⁸⁰Ge; deduced levels, J, π, β feedings, logft. Comparison with previous experimental results, and with shell-model and IBM calculations.

NUCLEAR STRUCTURE ^{70,72,74,76,78,80,82}Ge, ⁸²Se, ⁸⁴Kr, ⁸⁶Sr, ⁸⁸Zr, ⁹⁰Mo; calculated energies of second 0+ states by shell-model using Antoine code with JUN45 interaction, and NUSHELLX@MSU code with jj44bpn interaction, and IBM-1, IBM-2 models, and comparison with experimental values; Systematics of low-lying positive-parity levels up to 8+.

doi: 10.1103/PhysRevC.104.024317
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Data from this article have been entered in the XUNDL database. For more information, click here.

2020CZ01      Phys.Rev. C 101, 024312 (2020)

A.Czeszumska, N.D.Scielzo, S.A.Caldwell, J.A.Clark, G.Savard, B.S.Wang, A.Aprahamian, M.T.Burkey, C.J.Chiara, J.Harker, A.F.Levand, S.T.Marley, G.Morgan, J.M.Munson, E.B.Norman, A.Nystrom, R.Orford, S.W.Padgett, A.Perez Galvan, K.S.Sharma, K.Siegl, S.Y.Strauss

β-delayed neutron emission studies of ^137,138I and ^144,145Cs performed with trapped ions

RADIOACTIVITY ^137,138I, ^144,145Cs(β^-), (β^-n)[²⁵²Cf(SF) CARIBU facility and mass scans of radioactive beams with the Canadian Penning Trap (CPT) mass spectrometer at Argonne National Laboratory]; measured recoil ions, Eβ, Eγ, (recoil ions)β- and βγ-coin using Beta-decay Paul Trap with two plastic-scintillator ΔE-E telescopes, two MCP detectors, and two HPGe detectors; deduced beta-delayed neutron spectra, beta-delayed neutron-emission probabilities (%β^-n or P_n). Comparison with previous experimental results.

doi: 10.1103/PhysRevC.101.024312
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset14632. Data from this article have been entered in the XUNDL database. For more information, click here.

2020MA16      Phys.Rev. C 101, 044312 (2020)

S.N.T.Majola, M.A.Sithole, L.Mdletshe, D.Hartley, J.Timar, B.M.Nyako, J.M.Allmond, R.A.Bark, C.Beausang, L.Bianco, T.D.Bucher, S.P.Bvumbi, M.P.Carpenter, C.J.Chiara, N.Cooper, D.M.Cullen, D.Curien, T.S.Dinoko, B.J.P.Gall, P.E.Garrett, P.T.Greenlees, J.Hirvonen, U.Jakobsson, P.M.Jones, R.Julin, S.Juutinen, S.Ketelhut, B.V.Kheswa, F.G.Kondev, A.Korichi, W.D.Kulp, T.Lauritsen, E.A.Lawrie, L.Makhathini, P.L.Masiteng, B.Maqabuka, E.A.McCutchan, D.Miller, S.Miller, A.Minkova, L.Msebi, S.H.Mthembu, J.Ndayishimye, P.Nieminen, P.Z.Ngcobo, S.S.Ntshangase, J.N.Orce, P.Peura, P.Rahkila, N.Redon, L.L.Riedinger, M.A.Riley, D.G.Roux, P.Ruotsalainen, J.Piot, J.Saren, J.F.Sharpey-Schafer, C.Scholey, O.Shirinda, J.Simpson, J.Sorri, I.Stefanescu, S.Stolze, J.Uusitalo, X.Wang, V.Werner, J.L.Wood, C.-H.Yu, S.Zhu, G.Zimba

First candidates for γ vibrational bands built on the [505] 11/2^- neutron orbital in odd-A Dy isotopes

NUCLEAR REACTIONS ¹⁵⁵Gd(α, 2n)¹⁵⁷Dy, E=25 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ)(DCO), γγ(linear polarization) using the JUROGAM II array at the University of Jyvaskyla. ¹⁴⁸Nd(¹²C, 5n)¹⁵⁵Dy, E=65 MeV; ¹²⁴Sn(³⁶S, 5n)¹⁵⁵Dy, E=165 MeV; measured Eγ, Iγ, γγ-coin using GAMMASPHERE array at Argonne National Laboratory. ^155,157Dy; deduced high-spin levels, J, π, multipolarities, Kπ=0+ bands, Kπ=2+ γ-vibrational bands, configurations, alignments, B(M1)/B(E2) ratios. ¹⁵⁷Dy; calculated neutron quasiparticle Routhians using cranked shell model (CSM). ^154,156Dy; discussed first excited 0+ states in the core nuclei. Systematics of level energies versus spin for γ bands in ^{154,155,156,157,158}Dy and ^{152,153,154,155,156}Gd.

doi: 10.1103/PhysRevC.101.044312
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Data from this article have been entered in the XUNDL database. For more information, click here.

2020PA26      Phys.Rev. C 102, 014329 (2020)

V.Paziy, L.M.Fraile, H.Mach, B.Olaizola, G.S.Simpson, A.Aprahamian, C.Bernards, J.A.Briz, B.Bucher, C.J.Chiara, Z.Dlouhy, I.Gheorghe, D.Ghita, P.Hoff, J.Jolie, U.Koster, W.Kurcewicz, R.Lica, N.Marginean, R.Marginean, J.-M.Regis, M.Rudigier, T.Sava, M.Stanoiu, L.Stroe, W.B.Walters

Fast-timing study of ⁸¹Ga from the β decay of ⁸¹Zn

RADIOACTIVITY ⁸¹Zn(β^-), (β^-n)[from U(p, F), E=1.4 GeV at CERN PS-Booster (PSB) facility, followed by separation of ionized nuclei using the ISOLDE-RILIS]; measured Eγ, Iγ, b^-, βγ- and γγ-coin, half-life of ⁸¹Zn decay, level half-lives by βγγ(t) fast-timing technique, β-delayed neutron branching ratio or P_n using HPGe and LaBr₃ detectors for γ detection and a plastic scintillator for β detection at CERN-ISOLDE. ^80,81Ga(β^-); measured half-lives of ⁸⁰Ga and ⁸¹Ga decays. ^80,81Ga; deduced levels, J, π, Iβ, logft, B(M1), and B(E2). Comparison with large-scale shell model calculations using the NuShellX@MSU and ANTOINE codes with JUN45 and jj44b interactions. Systematics of low-lying levels in ^{71,73,75,77,79,81}Ga, ⁷⁹Cu, ⁸³As, ⁸⁵Br, ⁸⁷Rb. ⁸¹Zn; discussed spin, parity and configuration of the ground state.

doi: 10.1103/PhysRevC.102.014329
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2020WA04      Phys.Rev. C 101, 025806 (2020)

B.S.Wang, S.A.Caldwell, N.D.Scielzo, A.Czeszumska, J.A.Clark, G.Savard, A.Aprahamian, M.T.Burkey, C.J.Chiara, J.Harker, A.F.Levand, S.T.Marley, G.E.Morgan, J.M.Munson, E.B.Norman, A.Nystrom, R.Orford, S.W.Padgett, A.Perez Galvan, K.S.Sharma, K.Siegl, S.Y.Strauss

β-delayed-neutron studies of ^135,136Sb and ¹⁴⁰I performed with trapped ions

RADIOACTIVITY ^135,136Sb, ¹⁴⁰I(β^-), (β^-n) [from ²⁵²Cf(SF) CARIBU facility and mass scans of radioactive beams with the Canadian Penning Trap (CPT) mass spectrometer at Argonne National Laboratory]; measured recoil ions, Eβ, Eγ, (recoil ions)β- and βγ-coin using Beta-decay Paul Trap with two plastic-scintillator ΔE-E telescopes, two MCP detectors, and two HPGe detectors; deduced beta-delayed neutron spectra, beta-delayed neutron-emission probabilities (%β^-n or P_n). Comparison with earlier experimental results.

doi: 10.1103/PhysRevC.101.025806
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2019AU02      Phys.Lett. B 792, 187 (2019)

K.Auranen, D.Seweryniak, M.Albers, A.D.Ayangeakaa, S.Bottoni, M.P.Carpenter, C.J.Chiara, P.Copp, H.M.David, D.T.Doherty, J.Harker, C.R.Hoffman, R.V.F.Janssens, T.L.Khoo, S.A.Kuvin, T.Lauritsen, G.Lotay, A.M.Rogers, C.Scholey, J.Sethi, R.Talwar, W.B.Walters, P.J.Woods, S.Zhu

Proton decay of ¹⁰⁸I and its significance for the termination of the astrophysical rp-process

RADIOACTIVITY ¹⁰⁸I(α), (p), ¹⁰⁹I(p), ^107,108Te(α) [from ⁵⁴Fe(⁵⁸Ni, X)¹⁰⁸I/¹⁰⁹I/¹⁰⁸Te/¹⁰⁷Te, E=254 MeV]; measured Eα, Iα, Ep, Ip; deduced Q-values, T_1/2, mass excesses, branching ratio. Comparison with theoretical calculations.

doi: 10.1016/j.physletb.2019.03.039
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2019LO09      Eur.Phys.J. A 55, 109 (2019)

G.Lotay, D.T.Doherty, D.Seweryniak, S.Almaraz-Calderon, M.P.Carpenter, C.J.Chiara, H.M.David, C.R.Hoffman, R.V.F.Janssens, A.Kankainen, T.Lauritsen, R.Wilkinson, P.J.Woods, S.Zhu

Identification of γ-decaying resonant states in ²⁶Mg and their importance for the astrophysical s process

doi: 10.1140/epja/i2019-12791-5
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2019MI12      Phys.Rev. C 100, 014302 (2019)

S.L.Miller, K.A.Villafana, M.A.Riley, J.Simpson, D.J.Hartley, E.S.Paul, A.D.Ayangeakaa, J.S.Baron, P.F.Bertone, A.J.Boston, M.P.Carpenter, J.J.Carroll, J.Cavey, C.J.Chiara, P.Chowdhury, U.Garg, S.S.Hota, E.G.Jackson, R.V.F.Janssens, F.G.Kondev, T.Lauritsen, M.Litz, W.C.Ma, J.Matta, E.A.McCutchan, S.Mukhopadhyay, P.J.Nolan, E.E.Pedicini, L.L.Riedinger, J.F.Sharpey-Schafer, J.R.Vanhoy, A.Volya, X.Wang, S.Zhu

Backbending, seniority, and Pauli blocking of pairing correlations at high rotational frequencies in rapidly rotating nuclei

NUCLEAR STRUCTURE ^{156,157,158,159,160,161,162,163,164,165,166,168,170}Er, ^{158,159,160,161,162,163,164,165,166,167,168,169,170,171,172}Yb, ^{160,161,162,163,164,165,166,167,168,169,170,171,172,173,174}Hf, ^{164,165,166,167,168,169,170,171,172,173,174,175,176,177}W; calculated band-crossing frequencies of the first (AB) and the second (BC) i_13/2 neutron alignments. ¹⁶²Er, ¹⁶⁴Yb, ¹⁶⁶Hf, ¹⁶⁸W: calculated AB and BC crossing frequencies as function of quadrupole deformation, and as function of the percentage of the odd-even mass difference for N=94 nuclei. Comparison with experimental data. A=134-200, Z=52-82; systematics of E(first 4+)/E(first 2+) ratios for even-even nuclei.

doi: 10.1103/PhysRevC.100.014302
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2019RZ01      Phys.Rev. C 99, 044309 (2019)

J.Rzadkiewicz, M.Polasik, K.Slabkowska, L.Syrocki, E.Weder, J.J.Carroll, C.J.Chiara

Beam-based scenario for ^242mAm isomer depletion via nuclear excitation by electron capture

NUCLEAR REACTIONS ²⁴²Pu(d, 2n), (d, 3n), (d, F), E=6.2-7.5 MeV/nucleon; ²³⁸U(⁷Li, 3n), (⁷Li, 4n), (⁷Li, 5n), (⁷Li, F), E=5.0-6.3 MeV/nucleon; calculated σ(E) using GEMINI++ fusion-evaporation code. ⁷Li, ¹²C, ²⁷Al(²⁴²Am, X), E=2.5-6.0 MeV/nucleon; calculated mean equilibrium charge state, resonance strength for nuclear excitation by electron capture (NEEC) process in ^242mAm isomer as function of kinetic energy of ^242mAm ions for capture of an electron into various subshells. ^242mAm; discussed beam-based scenario for the production and depletion of the 141 y, 5- isomer through its excitation to the 52.7-keV level by electron capture.

doi: 10.1103/PhysRevC.99.044309
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2019SL01      Acta Phys.Pol. B50, 651 (2019)

K.Slabkowska, E.Weder, L.Syrocki, M.Polasik, J.Rzadkiewicz, J.J.Carroll, C.J.Chiara

^93mMo Isomer Depletion via Nuclear Excitation by Electron Capture: Energy Released for Different Atomic Subshells as Benchmarks for a Beam-based Scenario Approach

RADIOACTIVITY ⁹³Mo(IT); calculated energy release in electron capture process into different atomic subshells; analyzed scenarios for nuclear excitation by electron capture (NEEC), isomer depletion. Multiconfiguration Dirac–Fock (MCDF) calculations implemented with the GRASP and GRASP2K packages.

doi: 10.5506/aphyspolb.50.651
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2019ZH49      Phys.Lett. B 799, 135036 (2019)

G.X.Zhang, H.Watanabe, G.D.Dracoulis, F.G.Kondev, G.J.Lane, P.H.Regan, P.-A.Soderstrom, P.M.Walker, K.Yoshida, H.Kanaoka, Z.Korkulu, P.S.Lee, J.J.Liu, S.Nishimura, J.Wu, A.Yagi, D.S.Ahn, T.Alharbi, H.Baba, F.Browne, A.M.Bruce, M.P.Carpenter, R.J.Carroll, K.Y.Chae, C.J.Chiara, Zs.Dombradi, P.Doornenbal, A.Estrade, N.Fukuda, C.Griffin, E.Ideguchi, N.Inabe, T.Isobe, S.Kanaya, I.Kojouharov, T.Kubo, S.Kubono, N.Kurz, I.Kuti, S.Lalkovski, T.Lauritsen, C.S.Lee, E.J.Lee, C.J.Lister, G.Lorusso, G.Lotay, E.A.McCutchan, C.-B.Moon, I.Nishizuka, C.R.Nita, A.Odahara, Z.Patel, V.H.Phong, Zs.Podolyak, O.J.Roberts, H.Sakurai, H.Schaffner, D.Seweryniak, C.M.Shand, Y.Shimizu, T.Sumikama, H.Suzuki, H.Takeda, S.Terashima, Zs.Vajta, J.J.Valiente-Dobon, Z.Y.Xu, S.Zhu

Interplay of quasiparticle and vibrational excitations: First observation of isomeric states in ¹⁶⁸Dy and ¹⁶⁹Dy

RADIOACTIVITY ^168,169Dy(β^-) [from be(²³⁸U, X), E=345 MeV/nucleon]; measured decay products, Eγ, Iγ, X-rays; deduced level energies, J, π, B(E2), isomer T_1/2. Comparison with deformed QRPA and multi-quasiparticle calculations.

doi: 10.1016/j.physletb.2019.135036
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2018AU04      Phys.Rev.Lett. 121, 182501 (2018)

K.Auranen, D.Seweryniak, M.Albers, A.D.Ayangeakaa, S.Bottoni, M.P.Carpenter, C.J.Chiara, P.Copp, H.M.David, D.T.Doherty, J.Harker, C.R.Hoffman, R.V.F.Janssens, T.L.Khoo, S.A.Kuvin, T.Lauritsen, G.Lotay, A.M.Rogers, J.Sethi, C.Scholey, R.Talwar, W.B.Walters, P.J.Woods, S.Zhu

Superallowed α Decay to Doubly Magic ¹⁰⁰Sn

RADIOACTIVITY ¹⁰⁸Xe, ¹⁰⁴Te(α) [from ⁵⁴Fe(⁵⁸Ni, 4n)¹⁰⁸Xe, E=245 MeV]; measured decay products, Eα, Iα; deduced α-particles energies, T_1/2. A heavy self-conjugate nucleus, comparison with available data.

doi: 10.1103/PhysRevLett.121.182501
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2018BR15      Phys.Rev. C 98, 024324 (2018)

R.Broda, L.W.Iskra, R.V.F.Janssens, B.A.Brown, B.Fornal, J.Wrzesinski, N.Cieplicka-Orynczak, M.P.Carpenter, C.J.Chiara, C.R.Hoffman, F.G.Kondev, G.J.Lane, T.Lauritsen, Zs.Podolyak, D.Seweryniak, W.B.Walters, S.Zhu

Two-neutron and core-excited states in ²¹⁰Pb: Tracing E collectivity and evidence for a new β-decaying isomer in ²¹⁰Tl

NUCLEAR REACTIONS ²⁰⁸Pb(²⁰⁸Pb, X)²¹⁰Pb, E=1440 MeV; ²⁰⁸Pb(⁴⁸Ca, X)²¹⁰Pb, ²⁰⁸Pb(⁷⁶Ge, X)²¹⁰Pb, ²⁰⁸Pb(⁸²Se, X)²¹⁰Pb, ²³⁸U(⁴⁸Ca, X)²¹⁰Pb, ²³⁸U(²⁰⁸Pb, X)²¹⁰Pb, E=15-25% above the respective Coulomb barriers; measured Eγ, Iγ, delayed γ spectra, γγ-coin, γ(θ), half-lives of isomers and levels by γγ(t), ratio of observed production yields of anticipated 11+ β^--decaying isomer in ²¹⁰Tl and the 8+ isomer in ²¹⁰Pb using Gammasphere array at ATLAS-ANL facility. ²¹⁰Pb; deduced high-spin levels, isomers, J, π, conversion coefficients, multipolarities, configurations, B(E2), B(E3). ²¹⁰Tl; deduced possible 11+ β^- decaying isomer. Comparison with large-scale shell model calculations.

NUCLEAR STRUCTURE ²¹⁰Pb, ²¹⁰Tl; calculated levels, J, π by large-scale shell model calculations, and compared with experimental data.

doi: 10.1103/PhysRevC.98.024324
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2018CH13      Nature(London) 554, 7691 (2018)

C.J.Chiara, J.J.Carroll, M.P.Carpenter, J.P.Greene, D.J.Hartley, R.V.F.Janssens, G.J.Lane, J.C.Marsh, D.A.Matters, M.Polasik, J.Rzadkiewicz, D.Seweryniak, S.Zhu, S.Bottoni, A.B.Hayes, S.A.Karamian

Isomer depletion as experimental evidence of nuclear excitation by electron capture

NUCLEAR REACTIONS ⁷Li(⁹⁰Zr, 3np), E=840 MeV; measured Eγ, Iγ, γγγ-coin using Gammasphere array at ATLAS-ANL. ⁹³Mo; deduced levels, first experimental evidence of process of nuclear excitation by electron capture (NEEC) through the isomer depletion of 2425-keV isomer and excitation of the 2430-keV intermediate level from the 2425-keV isomer, and observation of 2475-268-685-1478 γ cascade in coincidence.

NUCLEAR REACTIONS ⁹⁰Zr(⁷Li, 3np), E(cm)=same as above for reverse kinematic reaction; measured Eγ, Iγ, γγ-coin at Australian National Laboratory. ⁹³Mo; deduced levels, non-observation of 2475- and 268-keV γ rays in γγ coincidences in the normal kinematics reaction consistent with NEEC interpretation in the inverse kinematic reaction study at Argonne.

doi: 10.1038/nature25483
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2018FO11      Phys.Rev.Lett. 120, 212501 (2018)

A.M.Forney, W.B.Walters, C.J.Chiara, R.V.F.Janssens, A.D.Ayangeakaa, J.Sethi, J.Harker, M.Alcorta, M.P.Carpenter, G.Gurdal, C.R.Hoffman, B.P.Kay, F.G.Kondev, T.Lauritsen, C.J.Lister, E.A.McCutchan, A.M.Rogers, D.Seweryniak, I.Stefanescu, S.Zhu

Novel ΔJ = 1 Sequence in ⁷⁸Ge: Possible Evidence for Triaxiality

NUCLEAR REACTIONS ²³⁸U(⁷⁶Ge, X)⁷⁸Ge, E=530 MeV; ¹⁹⁸Pt, ²⁰⁸Pb(⁷⁶Ge, X)⁷⁸Ge, E=450 MeV; measured reaction products, Eγ, Iγ; deduced energy levels, J, π, B(E2). Comparison with available data and calculations.

doi: 10.1103/PhysRevLett.120.212501
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2018LU08      Phys.Rev. C 97, 044312 (2018)

R.S.Lubna, V.Tripathi, S.L.Tabor, P.-L.Tai, K.Kravvaris, P.C.Bender, A.Volya, M.Bouhelal, C.J.Chiara, M.P.Carpenter, R.V.F.Janssens, T.Lauritsen, E.A.McCutchan, S.Zhu, R.M.Clark, P.Fallon, A.O.Macchiavelli, S.Paschalis, M.Petri, W.Reviol, D.G.Sarantites

Intruder configurations of excited states in the neutron-rich isotopes ³³P and ³⁴P

NUCLEAR REACTIONS ¹⁸O(¹⁸O, 2np), (¹⁸O, np), E=24 MeV; measured Eγ, Iγ, γ(θ), γγ-, pγ-coin using Gammasphere array for γ detection, and 4π Microball scintillator array for charged particle detection at ATLAS-ANL facility. ^33,34P; deduced levels, J, π, configurations. Comparison with shell-model calculations using PSDPF interaction.

NUCLEAR STRUCTURE ^{31,32,33,34,35}P; calculated levels, J, π using shell-model with the PSDPF interaction. Comparison with experimental data.

doi: 10.1103/PhysRevC.97.044312
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2018SI07      Phys.Rev. C 97, 035504 (2018)

K.Siegl, N.D.Scielzo, A.Czeszumska, J.A.Clark, G.Savard, A.Aprahamian, S.A.Caldwell, B.S.Alan, M.T.Burkey, C.J.Chiara, J.P.Greene, J.Harker, S.T.Marley, G.E.Morgan, J.M.Munson, E.B.Norman, R.Orford, S.Padgett, A.Perez Galvan, K.S.Sharma, S.Y.Strauss

Recoil ions from the β decay of ¹³⁴Sb confined in a Paul trap

RADIOACTIVITY ^134,134mSb(β^-)[from ²⁵²Cf SF decay at CARIBU-ANL facility]; measured β, γ, singly-charged recoil ions, βγ-coin, β(ce)-coin, (recoils)β-coin, time-of-flight spectra for β(ion)-coin using Beta-decay Paul Trap (BPT); deduced charge-state distribution of the recoiling ions, mean electron loss, β-ν correlation coefficient (a_βν), β-decay simulations, significant β-decay strength (17.2%) to high-lying excited states in ¹³⁴Te to obtain an angular correlation consistent with expected value of unity for 0- to 0+ β transition. Comparison of the observed β-decay spectrum with that from the decay scheme in the ENSDF database or Nuclear Data Sheets for ¹³⁴Sb g.s. decay. Comparison of mean atomic electron loss in ¹³⁴Sb decay with that from the decays of noble gases ⁶He, ²³Ne, ³⁵Ar, ⁴¹Ar, ⁸⁵Kr and ¹³³Xe. ^134,134mSb; half-lives used from literature and those determined at CARIBU-ANL facility (reference 23 in this work).

doi: 10.1103/PhysRevC.97.035504
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2017AM01      Phys.Rev. C 95, 014330 (2017)

B.M.S.Amro, C.J.Lister, E.A.McCutchan, W.Loveland, P.Chowdhury, S.Zhu, A.D.Ayangeakaa, J.S.Barrett, M.P.Carpenter, C.J.Chiara, J.P.Greene, J.L.Harker, R.V.F.Janssens, T.Lauritsen, A.A.Sonzogni, W.B.Walters, R.Yanez

γ-ray spectroscopy of ²⁰⁹Tl

NUCLEAR REACTIONS ²⁰⁸Pb(¹³⁶Xe, X)²⁰⁹Tl, E=785 MeV; measured Eγ, Iγ, γΓ-coin, delayed γ, half-lives of isomers using Gammasphere array at ATLAS-ANL facility. ²⁰⁹Tl; deduced levels, J, π, internal conversion coefficients, multipolarities, B(E2), configurations.

doi: 10.1103/PhysRevC.95.014330
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2017BO23      Phys.Lett. B 775, 271 (2017)

S.Bottoni, S.Zhu, R.V.F.Janssens, M.P.Carpenter, Y.Tsunoda, T.Otsuka, A.O.Macchiavelli, D.Cline, C.Y.Wu, A.D.Ayangeakaa, B.Bucher, M.Q.Buckner, C.M.Campbell, C.J.Chiara, H.L.Crawford, M.Cromaz, H.M.David, P.Fallon, A.Gade, J.P.Greene, J.Harker, A.B.Hayes, C.R.Hoffman, B.P.Kay, A.Korichi, T.Lauritsen, J.Sethi, D.Seweryniak, W.B.Walters, D.Weisshaar, A.Wiens

Nucleon correlations and the structure of ⁷¹₃₀Zn₄₁

NUCLEAR REACTIONS ⁷⁰Zn(⁴⁸Ca, ⁴⁷Ca)⁷¹Zn, E=170 MeV; ¹⁹⁷Au(⁷⁰Zn, X)⁷¹Zn, E=430 MeV; measured reaction products, Eγ, Iγ; deduced γ-ray energies, decay scheme, J, π, modest oblate deformation. Comparison with Monte-Carlo shell-model calculations.

doi: 10.1016/j.physletb.2017.11.003
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2017BR08      Phys.Rev. C 95, 064308 (2017)

R.Broda, R.V.F.Janssens, L.W.Iskra, J.Wrzesinski, B.Fornal, M.P.Carpenter, C.J.Chiara, N.Cieplicka-Orynczak, C.R.Hoffman, F.G.Kondev, W.Krolas, T.Lauritsen, Zs.Podolyak, D.Seweryniak, C.M.Shand, B.Szpak, W.B.Walters, S.Zhu, B.A.Brown

Doubly magic ²⁰⁸Pb: High-spin states, isomers, and E3 collectivity in the yrast decay

NUCLEAR REACTIONS ²⁰⁸Pb(⁴⁸Ca, X), E=430 MeV; ²⁰⁸Pb(²⁰⁸Pb, X), E=1440 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ), half-lives of isomers by γγ(t), in-beam and off-beam Iγ using Gammasphere array at ATLAS-ANL facility. ²⁰⁸Pb; deduced high-spin levels, new isomers, J, π, total electron-conversion coefficients from intensity balances, multipolarities, mixing ratios, B(E1), B(E2), B(E3), B(M1), B(M2), 1p-1h yrast and near-yrast states and their rotational interpretation, 2p-2h states. Comparison with shell-model calculations.

doi: 10.1103/PhysRevC.95.064308
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2017HA03      Phys.Rev. C 95, 014321 (2017)

D.J.Hartley, L.L.Riedinger, R.V.F.Janssens, S.N.T.Majola, M.A.Riley, J.M.Allmond, C.W.Beausang, M.P.Carpenter, C.J.Chiara, N.Cooper, D.Curien, B.J.P.Gall, P.E.Garrett, F.G.Kondev, W.D.Kulp, T.Lauritsen, E.A.McCutchan, D.Miller, S.Miller, J.Piot, N.Redon, J.F.Sharpey-Schafer, J.Simpson, I.Stefanescu, X.Wang, V.Werner, J.L.Wood, C.-H.Yu, S.Zhu, J.Dudek

Investigation of negative-parity states in ¹⁵⁶Dy: Search for evidence of tetrahedral symmetry

NUCLEAR REACTIONS ¹⁴⁸Nd(¹²C, 4n), E=65 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ)(DCO) using GAMMASPHERE array at ATLAS-ANL facility. ¹⁵⁶Dy; deduced high-spin levels, J, π, multipolarities, negative-parity bands, alignments, configurations, B(E2)/B(E1) ratios and octupole excitations, no evidence for tetrahedral symmetry. Systematics of Kπ=0-, 3- and Kπ=1-, 4- states in N=90 isotones ¹⁵²Sm, ¹⁵⁴Gd, ¹⁵⁶Dy and ¹⁶⁰Yb.

doi: 10.1103/PhysRevC.95.014321
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2017MA39      Phys.Rev. C 96, 014318 (2017)

D.A.Matters, F.G.Kondev, N.Aoi, Y.Ayyad, A.P.Byrne, M.P.Carpenter, J.J.Carroll, C.J.Chiara, P.M.Davidson, G.D.Dracoulis, Y.D.Fang, C.R.Hoffman, R.O.Hughes, E.Ideguchi, R.V.F.Janssens, S.Kanaya, B.P.Kay, T.Kibedi, G.J.Lane, T.Lauritsen, J.W.McClory, P.Nieminen, S.Noji, A.Odahara, H.J.Ong, A.E.Stuchbery, D.T.Tran, H.Watanabe, A.N.Wilson, Y.Yamamoto, S.Zhu

In-beam γ-ray spectroscopy studies of medium-spin states in the odd-odd nucleus ¹⁸⁶Re

NUCLEAR REACTIONS ¹⁸⁶W(d, 2n)¹⁸⁶Re, E=12.5, 14.5 MeV; measured Eγ, Iγ, γγ-coin using Clover Array Gamma-Ray spectrometer for Advanced research (CAGRA) at RCNP, Osaka University, and CAESAR spectrometer at the 14UD Pelletron accelerator of the Australian National University. ¹⁸⁶Re; deduced high-spin levels, J, π, K-shell conversion coefficients, multipolarities, bands, configurations, branching ratios and g_K-g_R values. Comparison with multi-quasiparticle blocking calculations.

doi: 10.1103/PhysRevC.96.014318
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2017PO03      Phys.Rev. C 95, 034312 (2017)

M.Polasik, K.Slabkowska, J.J.Carroll, C.J.Chiara, L.Syrocki, E.Weder, J.Rzadkiewicz

Resonance conditions for ^93mMo isomer depletion via nuclear excitation by electron capture in a beam-based scenario

NUCLEAR REACTIONS ⁴He(⁹¹Zr, xn)⁹⁴Mo/⁹³Mo/^93mMo/⁹²Mo, E<10 MeV/nucleon; calculated σ(E) using PACE4 code.

NUCLEAR STRUCTURE ^93mMo; analyzed scenarios for nuclear excitation by electron capture (NEEC), NEEC resonance window width, isomer depletion. Discussed role of complex atomic processes for resonance conditions to be satisfied in an experimental observation of the NEEC process.

doi: 10.1103/PhysRevC.95.034312
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2017VE05      Phys.Rev. C 96, 034311 (2017)

V.Vedia, V.Paziy, L.M.Fraile, H.Mach, W.B.Walters, A.Aprahamian, C.Bernards, J.A.Briz, B.Bucher, C.J.Chiara, Z.Dlouhy, I.Gheorghe, D.Ghita, P.Hoff, J.Jolie, U.Koster, W.Kurcewicz, R.Lica, N.Marginean, R.Marginean, B.Olaizola, J.-M.Regis, M.Rudigier, T.Sava, G.S.Simpson, M.Stanoiu, L.Stroe

Search for the ⁷³Ga ground-state doublet splitting in the β decay of ⁷³Zn

RADIOACTIVITY ⁷³Zn(β^-)[from U(p, F), E=1.4 GeV]; measured Eγ, Iγ, βγ- and γγ-coin, half-life of ⁷³Zn from γ-decay curves, level half-lives by fast-timing βγγ(t) technique using Resonance Ionization Laser Ion Source (RILIS) and magnetic high-resolution mass separator (HRS) at ISOLDE-CERN. ⁷³Ga; deduced levels, ground state doublet, J, π, β feedings, logft, B(M1), B(E2). ⁷³Zn(IT); measured Eγ, half-life of the isomer; deduced no evidence for a 42-keV transition from the isomer. Comparison with previous measurements, and with shell-model calculations. Systematics of level structure in ^71,73,75Ga.

doi: 10.1103/PhysRevC.96.034311
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2016AL18      Phys.Rev. C 94, 034301 (2016)

M.Albers, S.Zhu, A.D.Ayangeakaa, R.V.F.Janssens, J.Gellanki, I.Ragnarsson, M.Alcorta, T.Baugher, P.F.Bertone, M.P.Carpenter, C.J.Chiara, P.Chowdhury, H.M.David, A.N.Deacon, B.DiGiovine, A.Gade, C.R.Hoffman, F.G.Kondev, T.Lauritsen, C.J.Lister, E.A.McCutchan, C.Nair, A.M.Rogers, D.Seweryniak

Single-particle and collective excitations in ⁶²Ni

NUCLEAR REACTIONS ²⁶Mg(⁴⁸Ca, 4n2α)⁶²Ni, E=275, 320 MeV; measured reaction products identified by mass (A) and charge (Z), Eγ, Iγ, γ(θ), γγ-, (⁶²Ni)γ-coin, level half-lives and transition quadrupole moments using fragment mass analyzer (FMA) and Gammasphere array at ATLAS-ANL facility. ⁶²Ni; deduced high-spin levels, J, π, multipolarity, bands, deformation β₂, alignment plots, configurations. Comparison with shell-model calculations using JUN45 and jj4b interactions, and with Nilsson-Strutinsky calculations. Comparison of alignment plots with those in ⁵⁸Cr, ⁶⁰Fe, ⁶³Ni and ⁶⁴Zn.

doi: 10.1103/PhysRevC.94.034301
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2016AY01      Phys.Lett. B 754, 254 (2016)

A.D.Ayangeakaa, R.V.F.Janssens, C.Y.Wu, J.M.Allmond, J.L.Wood, S.Zhu, M.Albers, S.Almaraz-Calderon, B.Bucher, M.P.Carpenter, C.J.Chiara, D.Cline, H.L.Crawford, H.M.David, J.Harker, A.B.Hayes, C.R.Hoffman, B.P.Kay, K.Kolos, A.Korichi, T.Lauritsen, A.O.Macchiavelli, A.Richard, D.Seweryniak, A.Wiens

Shape coexistence and the role of axial asymmetry in ⁷²Ge

NUCLEAR REACTIONS ²⁰⁸Pb(⁷²Ge, ⁷²Ge'), E=301 MeV; measured reaction products, Eγ, Iγ. ⁷²Ge; deduced energy levels, J, π, reduced E2 matrix elements, B(E2) values. Comparison with available data.

doi: 10.1016/j.physletb.2016.01.036
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2016AY04      Phys.Rev. C 93, 054317 (2016)

A.D.Ayangeakaa, U.Garg, C.M.Petrache, S.Guo, P.W.Zhao, J.T.Matta, B.K.Nayak, D.Patel, R.V.F.Janssens, M.P.Carpenter, C.J.Chiara, F.G.Kondev, T.Lauritsen, D.Seweryniak, S.Zhu, S.S.Ghugre, R.Palit

In-beam spectroscopy of medium- and high-spin states in ¹³³Ce

NUCLEAR REACTIONS ¹¹⁶Cd(²²Ne, 5n), E=112 MeV; measured Eγ, Iγ, γγ-coin, γ(θ), γγ(θ) using Gammasphere array at ATLAS-ANL facility, enriched target. ¹³³Ce; deduced high-spin levels, J, π, multipolarity, dipole and quadrupole bands, alignments, configurations, rich diversity of collective phenomena. Comparisons with calculations based on cranked Nilsson-Strutinsky (CNS) model and tilted axis cranking covariant density functional theory (TAC-CDFT).

doi: 10.1103/PhysRevC.93.054317
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2016BA04      Phys.Rev. C 93, 014313 (2016)

T.Baugher, A.Gade, R.V.F.Janssens, S.M.Lenzi, D.Bazin, M.P.Carpenter, C.J.Chiara, A.N.Deacon, S.J.Freeman, G.F.Grinyer, C.R.Hoffman, B.P.Kay, F.G.Kondev, T.Lauritsen, E.M.Lunderberg, S.McDaniel, K.C.Meierbachtol, A.Ratkiewicz, S.R.Stroberg, K.A.Walsh, D.Weisshaar, S.Zhu

In-beam γ spectroscopy of ⁶³Mn

NUCLEAR REACTIONS ⁹Be(⁶³Mn, ⁶³Mn'), E=84 meV/nucleon, [secondary ⁶³Mn from ⁹Be(⁷⁶Ge, X), E=130 MeV/nucleon primary reaction]; measured Eγ, Iγ, (⁶³Mn)γ-, γγ-coin, level half-lives by Doppler line-shape analysis using SeGA and GRETINA arrays for γ detection, A1900 fragment separator and S-800 spectrograph at NSCL-MSU accelerator facility; recreated Doppler-corrected γ spectra. ⁶³Mn; deduced levels, J, π, B(M1), B(E2). Comparison with large-scale shell-model calculations using different model spaces and effective interactions. Systematics of ^59,61,63Mn level structures.

doi: 10.1103/PhysRevC.93.014313
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2016BU02      Phys.Rev.Lett. 116, 112503 (2016)

B.Bucher, S.Zhu, C.Y.Wu, R.V.F.Janssens, D.Cline, A.B.Hayes, M.Albers, A.D.Ayangeakaa, P.A.Butler, C.M.Campbell, M.P.Carpenter, C.J.Chiara, J.A.Clark, H.L.Crawford, M.Cromaz, H.M.David, C.Dickerson, E.T.Gregor, J.Harker, C.R.Hoffman, B.P.Kay, F.G.Kondev, A.Korichi, T.Lauritsen, A.O.Macchiavelli, R.C.Pardo, A.Richard, M.A.Riley, G.Savard, M.Scheck, D.Seweryniak, M.K.Smith, R.Vondrasek, A.Wiens

Direct Evidence of Octupole Deformation in Neutron-Rich ¹⁴⁴Ba

NUCLEAR REACTIONS ²⁰⁸Pb(¹⁴⁴Ba, ¹⁴⁴Ba'), E=650 MeV; measured reaction products, Eγ, Iγ. ¹⁴⁴Ba; deduced yields, E2 and E3 matrix elements, quadrupole moments, deformation parameters, B(E2), B(E3). Comparison with theoretical calculations.

doi: 10.1103/PhysRevLett.116.112503
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2016CR05      Phys.Lett. B 763, 108 (2016)

B.P.Crider, C.J.Prokop, S.N.Liddick, M.Al-Shudifat, A.D.Ayangeakaa, M.P.Carpenter, J.J.Carroll, J.Chen, C.J.Chiara, H.M.David, A.C.Dombos, S.Go, R.Grzywacz, J.Harker, R.V.F.Janssens, N.Larson, T.Lauritsen, R.Lewis, S.J.Quinn, F.Recchia, A.Spyrou, S.Suchyta, W.B.Walters, S.Zhu

Shape coexistence from lifetime and branching-ratio measurements in ^{68, 70}Ni

RADIOACTIVITY ⁷⁰Co, ⁶⁸Fe, ⁶⁸Co(β^-) [from ⁹Be(⁷⁶Ge, X)⁷⁰Co/⁶⁸Fe]; measured reaction products, Eγ, Iγ; deduced energy levels, J, π, T_1/2, branching ratios, B(E2).

doi: 10.1016/j.physletb.2016.10.020
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2016HA36      Phys.Rev. C 94, 054329 (2016)

D.J.Hartley, R.V.F.Janssens, L.L.Riedinger, M.A.Riley, X.Wang, S.L.Miller, A.D.Ayangeakaa, P.F.Bertone, M.P.Carpenter, C.J.Chiara, P.Chowdhury, U.Garg, G.Gurdal, S.S.Hota, F.G.Kondev, T.Lauritsen, W.C.Ma, J.Matta, E.A.McCutchan, S.Mukhopadhyay, E.E.Pedicini, J.R.Vanhoy, S.Zhu

First observation of rotational structures in ¹⁶⁸Re

NUCLEAR REACTIONS ¹¹⁸Sn(⁵⁵Mn, 5n), E=260 MeV; measured Eγ, Iγ, γγ-coin using Gammasphere array at ATLAS-ANL facility. ¹⁶⁸Re; deduced high-spin levels, J, π, γ-branching ratios, bands, alignments, band crossings, B(M1)/B(E2) ratios, configuration. Comparison of B(M1)/B(E2) ratios with theoretical calculations. Systematics of level energies for πh_11/2νi_13/2 bands in ^{166,168,170,172,174}Re. Systematics of signature splitting for πh_11/2νi_13/2 bands in ^{166,168,170,172,174}Re, ^{164,166,168,170,172}Ta, ^{162,164,166,168,170}Lu.

doi: 10.1103/PhysRevC.94.054329
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2016HO13      Phys.Rev. C 94, 021303 (2016)

S.S.Hota, S.K.Tandel, P.Chowdhury, I.Ahmad, M.P.Carpenter, C.J.Chiara, J.P.Greene, C.R.Hoffman, E.G.Jackson, R.V.F.Janssens, B.P.Kay, T.L.Khoo, F.G.Kondev, S.Lakshmi, S.Lalkovski, T.Lauritsen, C.J.Lister, E.A.McCutchan, K.Moran, D.Peterson, U.Shirwadkar, D.Seweryniak, I.Stefanescu, Y.Toh, S.Zhu

Population and decay of a K^π = 8^- two-quasineutron isomer in ²⁴⁴Pu

NUCLEAR REACTIONS ²⁴⁴Pu(²⁰⁸Pb, ²⁰⁸Pb'), E=1430 MeV; ²⁴⁴Pu(⁴⁷Ti, ⁴⁷TI'), E=305 MeV; measured Eγ, Iγ, γγ-coin, M1/E2 branching ratios, prompt and off-beam γ rays, half-life of a 2-qp 8- isomer using Gammasphere array at ATLAS-ANL. ²⁴⁴Pu; deduced high-spin levels, J, π, rotational bands, multipolarity, configurations, kinematic and dynamic moments of inertia, (g_k-g_R)/Q₀, reduced hindrance factors for transitions from the isomer. Comparison with multi-qp calculations using Woods-Saxon potential and Lipkin-Nogami pairing. Systematics of moment of inertia plots and 8- isomers for ²⁴⁴Pu, ²⁵⁰Fm and ²⁵²No.

doi: 10.1103/PhysRevC.94.021303
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2016IS03      Phys.Rev. C 93, 014303 (2016)

L.W.Iskra, R.Broda, R.V.F.Janssens, C.J.Chiara, M.P.Carpenter, B.Fornal, N.Hoteling, F.G.Kondev, W.Krolas, T.Lauritsen, T.Pawlat, D.Seweryniak, I.Stefanescu, W.B.Walters, J.Wrzesinski, S.Zhu

Shell-model states with seniority ν = 3, 5, and 7 in odd-A neutron-rich Sn isotopes

NUCLEAR REACTIONS ²⁰⁸Pb, ²³⁸U(⁴⁸Ca, X), E=330 MeV; ²³⁸U(⁶⁴Ni, F), E=430 MeV; measured Eγ, Iγ, γγ-coin, delayed γγ-coin, isomer half-lives using Gammasphere array at ATLAS-ANL facility. ^{115,117,119,121,123,125,127,129}Sn; measured yields of reaction products. ^{119,121,123,125}Sn; deduced high-spin levels, J, π, multipolarity, high-seniority states, isomers, B(E1), B(E2), B(M2), B(E3). Comparison with shell model calculations with jj55pn interactions. Systematics of yrast levels and B(Eλ) values for ^{117,119,121,123,125,127,129}Sn. Systematics of B(E2) values for 10+ to 8+ and 19/2+ to 15/2+ isomeric transitions in A=116-130 Sn isotopes.

NUCLEAR STRUCTURE ^{119,121,123,125,127,129}Sn; calculated levels, J, π using shell model with jj55pn interaction. Comparison with experimental spectra.

doi: 10.1103/PhysRevC.93.014303
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2016MI02      Phys.Rev. C 93, 014306 (2016)

A.J.Mitchell, C.J.Lister, E.A.McCutchan, M.Albers, A.D.Ayangeakaa, P.F.Bertone, M.P.Carpenter, C.J.Chiara, P.Chowdhury, J.A.Clark, P.Copp, H.M.David, A.Y.Deo, B.DiGiovine, N.D'Olympia, R.Dungan, R.D.Harding, J.Harker, S.S.Hota, R.V.F.Janssens, F.G.Kondev, S.H.Liu, A.V.Ramayya, J.Rissanen, G.Savard, D.Seweryniak, R.Shearman, A.A.Sonzogni, S.L.Tabor, W.B.Walters, E.Wang, S.Zhu

ψ-soft ¹⁴⁶Ba and the role of nonaxial shapes at N ≈ 90

RADIOACTIVITY ¹⁴⁶Cs(β^-)[from ²⁵²Cf SF and mass separation at CARIBU-ANL facility]; measured Eγ, Iγ, βγ-, βγγ-coin using SATURN detection system at ANL. ¹⁴⁶Ba; deduced levels, J, π, limits of β^- branching ratios. Level systematics in even-A N=90 isotones with Z=56-68, and those of g.s., β- and γ-bands in ¹⁴⁶Ba, ¹⁴⁸Ce, ¹⁵⁰Nd. Investigation of nuclear shape transitions. Comparison with interacting boson approximation (IBA) model predictions.

doi: 10.1103/PhysRevC.93.014306
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2016MU06      Phys.Rev. C 93, 065803 (2016)

M.Munch, M.Alcorta, H.O.U.Fynbo, M.Albers, S.Almaraz-Calderon, M.L.Avila, A.D.Ayangeakaa, B.B.Back, P.F.Bertone, P.F.F.Carnelli, M.P.Carpenter, C.J.Chiara, J.A.Clark, B.DiGiovine, J.P.Greene, J.L.Harker, C.R.Hoffman, N.J.Hubbard, C.L.Jiang, O.S.Kirsebom, T.Lauritsen, K.L.Laursen, S.T.Marley, C.Nair, O.Nusair, D.Santiago-Gonzalez, J.Sethi, D.Seweryniak, R.Talwar, C.Ugalde, S.Zhu

Independent measurement of the Hoyle state β feeding from ¹²B using Gammasphere

RADIOACTIVITY ¹²B(β^-)[from ²H(¹¹B, p), E=40 MeV from ATLAS-ANL facility]; measured Eγ, Iγ, γγ-coin, γγ(θ) for the Hoyle state using Gammasphere array. ¹²C; deduced first excited 2+ and 0+ levels, β branching ratio to the Hoyle state in ¹²C, logft, indication of higher clustering for the Hoyle state as compared to previous results. Comparison with theoretical calculations using antisymmetrized molecular dynamics (AMD), and with previous experimental results.

doi: 10.1103/PhysRevC.93.065803
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2016PE09      Phys.Rev. C 93, 064305 (2016)

C.M.Petrache, S.Guo, A.D.Ayangeakaa, U.Garg, J.T.Matta, B.K.Nayak, D.Patel, M.P.Carpenter, C.J.Chiara, R.V.F.Janssens, F.G.Kondev, T.Lauritsen, D.Seweryniak, S.Zhu, S.S.Ghugre, R.Palit

Triaxiality and exotic rotations at high spins in ¹³⁴Ce

NUCLEAR REACTIONS ¹¹⁶Cd(²²Ne, 4n), E=112 MeV; Measured Eγ, Iγ, γγ-coin, γ(θ), γγ(θ) using Gammasphere array at ATLAS-ANL facility. ¹³⁴Ce; deduced high-spin levels, J, π, multipolarity, SD and triaxial bands, triaxiality, alignments, configurations. Comparison with cranked Nilsson-Strutinsky (CNS) calculations.

doi: 10.1103/PhysRevC.93.064305
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2016PE21      Phys.Rev. C 94, 064309 (2016)

C.M.Petrache, Q.B.Chen, S.Guo, A.D.Ayangeakaa, U.Garg, J.T.Matta, B.K.Nayak, D.Patel, J.Meng, M.P.Carpenter, C.J.Chiara, R.V.F.Janssens, F.G.Kondev, T.Lauritsen, D.Seweryniak, S.Zhu, S.S.Ghugre, R.Palit

Triaxial-band structures, chirality, and magnetic rotation in ¹³³La

NUCLEAR REACTIONS ¹¹⁶Cd(²²Ne, 4np), E=112 MeV; measured Eγ, Iγ, γγ-coin, γ(θ), γγ(θ) ratios using Gammasphere array at ATLAS-ANL facility. ¹³³La; deduced high-spin levels, J, π, multipolarities, bands, alignments, B(M1)/B(E2) ratios, configurations. Comparison with calculations using cranked Nilsson-Strutinsky (CNS) model, covariant density functional theory (CDFT) with a self-consistent relativistic mean field (RMF), and the particle rotor model (PRM).

doi: 10.1103/PhysRevC.94.064309
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2016RE20      Phys.Rev. C 94, 054324 (2016)

F.Recchia, D.Weisshaar, A.Gade, J.A.Tostevin, R.V.F.Janssens, M.Albers, V.M.Bader, T.Baugher, D.Bazin, J.S.Berryman, B.A.Brown, C.M.Campbell, M.P.Carpenter, J.Chen, C.J.Chiara, H.L.Crawford, C.R.Hoffman, F.G.Kondev, A.Korichi, C.Langer, T.Lauritsen, S.N.Liddick, E.Lunderberg, S.Noji, C.Prokop, S.R.Stroberg, S.Suchyta, K.Wimmer, S.Zhu

Neutron single-particle strengths at N=40, 42: Neutron knockout from ^{68, 70}Ni ground and isomeric states

NUCLEAR REACTIONS ⁹Be(⁶⁸Ni, ⁶⁷Ni), E=85 MeV/nucleon; ⁹Be(⁷⁰Ni, ⁶⁹Ni), E=74 MeV/nucleon, [secondary ^68,70Ni beams from ⁹Be(⁸²Se, X), E=140 MeV/nucleon, followed by separation of fragments using A1900 separator at NSCL-MSU]; measured particle spectra, Eγ, Iγ, one-neutron knockout σ for levels in the final nuclei, (⁶⁷Ni or ⁶⁹Ni)γ-coin, parallel momentum distributions, delayed γ from isomers using GRETINA array for γ detection and S800 spectrograph for particle analysis. ^67,69Ni; measured levels, J, π, l-transfers. Comparison with shell-model calculations.

doi: 10.1103/PhysRevC.94.054324
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2015AY02      Phys.Rev. C 91, 044327 (2015)

A.D.Ayangeakaa, S.Zhu, R.V.F.Janssens, M.P.Carpenter, M.Albers, M.Alcorta, T.Baugher, P.F.Bertone, C.J.Chiara, P.Chowdhury, H.M.David, A.N.Deacon, B.DiGiovine, A.Gade, C.R.Hoffman, F.G.Kondev, T.Lauritsen, C.J.Lister, E.A.McCutchan, D.S.Moerland, C.Nair, A.M.Rogers, D.Seweryniak

Role of the νg_9/2 orbital in the development of collectivity in the A≈60 region: The case of ⁶¹Co

NUCLEAR REACTIONS ²⁶Mg(⁴⁸Ca, 4np2α)⁶¹Co, E=275, 290, 320 MeV; measured Eγ, Iγ, γγ-coin, γ(θ), centroid-shift Doppler-attenuation using FMA analyzer and GAMMASPHERE array at ATLAS-ANL facility. ⁶¹Co; deduced levels, J, π, multipolarity, bands, magnetic rotational dipole (shears) band, transition quadrupole moment and deformation parameter from DSA data, Nilsson configurations. Comparison with shell-model calculations using GXPF1A effective interaction in a modest-size pf space, and with structures of N=34 isotones ⁶⁰Fe and ⁶²Ni.

doi: 10.1103/PhysRevC.91.044327
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2015BA20      Phys.Rev. C 91, 064615 (2015)

J.S.Barrett, W.Loveland, R.Yanez, S.Zhu, A.D.Ayangeakaa, M.P.Carpenter, J.P.Greene, R.V.F.Janssens, T.Lauritsen, E.A.McCutchan, A.A.Sonzogni, C.J.Chiara, J.L.Harker, W.B.Walters

¹³⁶Xe+²⁰⁸Pb reaction: A test of models of multinucleon transfer reactions

NUCLEAR REACTIONS ²⁰⁸Pb(¹³⁶Xe, X), E=85 MeV; measured Eγ, Iγ, γγ-coin using Gammasphere at ATLAS-ANL facility, σ for projectile-like fragments (PLFs) and target-like fragments (TLFs) by off-line γ-ray spectroscopy for radioactive decay measurements (RD), prompt γ decays recorded during the beam burst (IB), and delayed γ decays recorded between the beam bursts (OB). ^116,118Cd, ^119,121In, ^{118,120,122,123,124,126}Sn, ^{119,121,123,125,126,127,128,130}Sb, ^{124,126,128,130,131,132,134}Te, ^{127,128,129,130,131,132,133,135,136}I, ^128,130,132Xe, ^{133,134,135,136,137,138}Xe, ^{131,132,133,134,136,137,139,141}Cs, ¹³⁰Ba, ^{132,134,136,138,139,140,141,142,143}Ba, ^{132,135,136,137,139,140,143}La, ^{136,138,139,140,141,142,143,144,145,146}Ce, ^139,141,142Pr, ^{140,142,143,144,145,146,147,148,149}Nd, ^{142,143,145,147,149}Pm, ^{145,146,147,148,149,150,151,152,154}Sm, ^147,149,151Eu, ^152,154,156Gd, ^{156,158,160,162,164}Dy, ^160,161Er, ¹⁷⁶Yb, ^{176,178,180,181,182}Hf, ^179,181Ta, ^{176,180,182,184,186,187}W, ^179,185,187Re, ^{186,188,190,191,192,194,197}Os, ^188,190,192Ir, ^{190,191,192,194,196,197,198,200,201,202}Pt, ^{191,192,193,194,196,198,199}Au, ^{194,196,198,200,202,203,204,205,206,208}Hg, ^{196,197,198,199,201,202,203,204,205,206,207}Tl, ^{198,201,202,203,204,206,207,208,209,210,211}Pb, ^{199,201,202,203,204,205,206,207,209,211}Bi, ^{202,204,205,206,207,208,209,210,212,213,214}Po, ^{207,208,209,210,211,213}At, ^{210,211,212,213,214,215,216,218}Rn, ^{211,212,213,215,216}Fr, ²¹⁴Ra; deduced projectile-like fragment cumulative and independent production yields. Comparison with predictions of GRAZING model, and those of Zagrebaev and Greiner model using a quantitative metric. Discussed correlations between TLF and PLF yields.

doi: 10.1103/PhysRevC.91.064615
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2015CH25      Phys.Rev. C 91, 044309 (2015)

C.J.Chiara, D.Weisshaar, R.V.F.Janssens, Y.Tsunoda, T.Otsuka, J.L.Harker, W.B.Walters, F.Recchia, M.Albers, M.Alcorta, V.M.Bader, T.Baugher, D.Bazin, J.S.Berryman, P.F.Bertone, C.M.Campbell, M.P.Carpenter, J.Chen, H.L.Crawford, H.M.David, D.T.Doherty, A.Gade, C.R.Hoffman, M.Honma, F.G.Kondev, A.Korichi, C.Langer, N.Larson, T.Lauritsen, S.N.Liddick, E.Lunderberg, A.O.Macchiavelli, S.Noji, C.Prokop, A.M.Rogers, D.Seweryniak, N.Shimizu, S.R.Stroberg, S.Suchyta, Y.Utsuno, S.J.Williams, K.Wimmer, S.Zhu

Identification of deformed intruder states in semi-magic ⁷⁰Ni

NUCLEAR REACTIONS ²⁰⁸Pb(⁷⁰Zn, X)⁷⁰Ni, E=440 MeV; measured Eγ, Iγ, prompt- and delayed-γ spectra, γγ-coin, γγ(θ) using Gammasphere array at ATLAS-ANL facility. ⁹Be(⁸²Se, X)⁷⁰Ni, E=140 MeV/nucleon; measured Eγ, Iγ, (⁷⁰Ni)γ-, γγ-coin, prompt and delayed γ rays using S800 spectrograph, GRETINA and CsI(Na) arrays at NSCL-MSU facility. ⁷⁰Ni; deduced levels, J, π. Comparison with Monte Carlo shell-model calculations.

NUCLEAR STRUCTURE ^68,70Ni, ⁹²Mo; calculated levels, J, π, potential-energy surface contours in (Q₂, Q₄) plane. Shell-model using jj44bpn, jj44pna, JUN45, and JUN45 effective interactions, and Monte Carlo shell-model with A3DA interaction. Comparison with experimental data.

doi: 10.1103/PhysRevC.91.044309
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2015DA12      Phys.Rev.Lett. 115, 132502 (2015)

H.M.David, J.Chen, D.Seweryniak, F.G.Kondev, J.M.Gates, K.E.Gregorich, I.Ahmad, M.Albers, M.Alcorta, B.B.Back, B.Baartman, P.F.Bertone, L.A.Bernstein, C.M.Campbell, M.P.Carpenter, C.J.Chiara, R.M.Clark, M.Cromaz, D.T.Doherty, G.D.Dracoulis, N.E.Esker, P.Fallon, O.R.Gothe, J.P.Greene, P.T.Greenlees, D.J.Hartley, K.Hauschild, C.R.Hoffman, S.S.Hota, R.V.F.Janssens, T.L.Khoo, J.Konki, J.T.Kwarsick, T.Lauritsen, A.O.Macchiavelli, P.R.Mudder, C.Nair, Y.Qiu, J.Rissanen, A.M.Rogers, P.Ruotsalainen, G.Savard, S.Stolze, A.Wiens, S.Zhu

Decay and Fission Hindrance of Two- and Four-Quasiparticle K Isomers in ²⁵⁴Rf

NUCLEAR REACTIONS ²⁰⁶Pb(⁵⁰Ti, 2n)²⁵⁴Rf, E=242.5 MeV; measured reaction products, Eγ, Iγ, Eβ, Iβ; deduced energy levels, J, π, isomer T_1/2, unprecedented fission hindrance relative to the ground state. Comparison with multiquasiparticle calculations.

doi: 10.1103/PhysRevLett.115.132502
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2015DO07      Phys.Rev. C 92, 035808 (2015)

D.T.Doherty, P.J.Woods, D.Seweryniak, M.Albers, A.D.Ayangeakaa, M.P.Carpenter, C.J.Chiara, H.M.David, J.L.Harker, R.V.F.Janssens, A.Kankainen, C.Lederer, S.Zhu

Structure of resonances in the Gamow burning window for the ²⁵Al(p, γ)²⁶Si reaction in novae

NUCLEAR REACTIONS ²⁴Mg(³He, n), E=10 MeV; measured Eγ, Iγ, γγ-coin, γ(θ) using Gammasphere array at ATLAS-ANL. ²⁶Si; deduced levels, J, π, ΔJ, multipolarity, mirror assignments with levels in ²⁶Mg. Comparison with sd-shell-model calculations. Relevance to ²⁵Al(p, γ)²⁶Si reaction of astrophysical interest, and Gamow burning window.

doi: 10.1103/PhysRevC.92.035808
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2015HA16      Phys.Rev. C 91, 057301 (2015)

D.J.Hartley, M.A.Riley, X.Wang, S.Miller, R.V.F.Janssens, E.S.Paul, J.M.Rees, J.Simpson, L.L.Riedinger, A.D.Ayangeakaa, M.P.Carpenter, C.J.Chiara, U.Garg, P.Hampson, C.R.Hoffman, F.G.Kondev, T.Lauritsen, P.J.R.Mason, J.T.Matta, P.J.Nolan, J.Ollier, M.Petri, D.C.Radford, J.P.Revill, S.Zhu, I.Ragnarsson

Persistence of collective behavior at high spin in the N=88 nucleus ¹⁵³Tb

NUCLEAR REACTIONS ¹²⁴Sn(³⁷Cl, 4nα), E=180 MeV; measured Eγ, Iγ, γγ-coin using Gammasphere array at ATLAS-ANL facility. ¹⁵³Tb; deduced high-spin levels, J, π, bands, alignments, configurations. Systematics of yrast states in N=88 isotones ¹⁵²Gd, ¹⁵⁴Dy, ¹⁵⁶Er, ¹⁵⁸Yb, ¹⁵³Tb, ¹⁵⁵Ho, ¹⁵⁷Tm, and Comparison with Nilsson-Strutinsky (CNS) calculations.

doi: 10.1103/PhysRevC.91.057301
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2015IS02      Acta Phys.Pol. B46, 651 (2015)

L.W.Iskra, R.Broda, R.V.F.Janssens, J.Wrzesinski, C.J.Chiara, M.P.Carpenter, B.Fornal, N.Hoteling, F.G.Kondev, W.Krolas, T.Lauritsen, T.Pawlat, D.Seweryniak, I.Stefanescu, W.B.Walters, S.Zhu

E2 Transition Probabilities for Decays of Isomers Observed in Neutron-rich Odd Sn Isotopes

NUCLEAR REACTIONS ²⁰⁸Pb, ²³⁸U(⁴⁸Ca, X), ²³⁸U(⁶⁴Ni, X)¹¹⁶Sn/¹¹⁸Sn/¹²⁰Sn/¹²²Sn/¹²⁴Sn/¹²⁶Sn/¹²⁸Sn/¹³⁰Sn, E=6.7-6.9 MeV/nucleon; measured reaction products, Eγ, Iγ; deduced high-spin states energy levels, T_1/2, B(E2).

doi: 10.5506/APhysPolB.46.651
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2015LI33      Phys.Rev. C 92, 024319 (2015); Erratum Phys.Rev. C 94, 069904 (2016)

S.N.Liddick, W.B.Walters, C.J.Chiara, R.V.F.Janssens, B.Abromeit, A.Ayres, A.Bey, C.R.Bingham, M.P.Carpenter, L.Cartegni, J.Chen, H.L.Crawford, I.G.Darby, R.Grzywacz, J.Harker, C.R.Hoffman, S.Ilyushkin, F.G.Kondev, N.Larson, M.Madurga, D.Miller, S.Padgett, S.V.Paulauskas, M.M.Rajabali, K.Rykaczewski, D.Seweryniak, S.Suchyta, S.Zhu

Analogous intruder behavior near Ni, Sn, and Pb isotopes

RADIOACTIVITY ⁶⁹Fe, ⁶⁹Co, ⁶⁹Ni(β^-)[from ⁹Be(⁷⁸Kr, X), E=140 MeV/nucleon]; measured Eγ, Iγ, (ion)γ- and βγ- correlated events, half-lives of ground states of ⁶⁹Co, ⁶⁹Fe, and half-life of an isomer in ⁶⁹Co, absolute intensities of γ rays from the decay of directly produced ⁶⁹Co and that from the decay of ⁶⁹Fe using BCS system and SEGA array at NSCL-MSU facility. ⁶⁹Cu, ⁶⁹Co; deduced levels in ⁶⁹Cu, and isomer in ⁶⁹Co, J, π, intruder configuration; identified and discussed proton particle-hole intruder states originating from excitations across Z=28. ⁶⁸Fe, ⁶⁸Co(β^-); observed γ.

NUCLEAR REACTIONS ²⁰⁸Pb(⁷⁰Zn, X)⁷¹Cu, E=440 MeV; measured Eγ, Iγ, γγ-coin using Gammasphere array at ATLAS-ANL facility. ⁷¹Cu; deduced high-spin levels, J, π, band; discussed systematics of level structure and proton particle-hole intruder states in ^67,69,71Cu.

doi: 10.1103/PhysRevC.92.024319
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2015MA13      Phys.Rev.Lett. 114, 082501 (2015)

J.T.Matta, U.Garg, W.Li, S.Frauendorf, A.D.Ayangeakaa, D.Patel, K.W.Schlax, R.Palit, S.Saha, J.Sethi, T.Trivedi, S.S.Ghugre, R.Raut, A.K.Sinha, R.V.F.Janssens, S.Zhu, M.P.Carpenter, T.Lauritsen, D.Seweryniak, C.J.Chiara, F.G.Kondev, D.J.Hartley, C.M.Petrache, S.Mukhopadhyay, D.Vijaya Lakshmi, M.K.Raju, P.V.Madhusudhana Rao, S.K.Tandel, S.Ray, F.Donau

Transverse Wobbling in ¹³⁵Pr

NUCLEAR REACTIONS ¹²³Sb(¹⁶O, 4n), E=80 MeV; measured reaction products, Eγ, Iγ, γ-γ-γ-coin.; deduced energy levels, J, π, wobbling bands, B(M1)/B(E2), deviation from axiality. Comparison with available data and theoretical calculations.

doi: 10.1103/PhysRevLett.114.082501
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2015MA15      Phys.Rev. C 91, 034330 (2015)

S.N.T.Majola, D.J.Hartley, L.L.Riedinger, J.F.Sharpey-Schafer, J.M.Allmond, C.Beausang, M.P.Carpenter, C.J.Chiara, N.Cooper, D.Curien, B.J.P.Gall, P.E.Garrett, R.V.F.Janssens, F.G.Kondev, W.D.Kulp, T.Lauritsen, E.A.McCutchan, D.Miller, J.Piot, N.Redon, M.A.Riley, J.Simpson, I.Stefanescu, V.Werner, X.Wang, J.L.Wood, C.-H.Yu, S.Zhu

Observation of γ vibrations and alignments built on non-ground-state configurations in ¹⁵⁶Dy

NUCLEAR REACTIONS ¹⁴⁸Nd(¹²C, 4n), E=65 MeV; measured Eγ, Iγ, multi-fold γγ-coin, γγ(θ)(DCO) using Gammasphere array at ATLAS-ANL facility. ¹⁵⁶Dy; deduced high-spin levels, J, π, multipolarities, ground-state, γ- and S-bands, 0+ pairing isomer state, alignments, B(E2) ratios, candidate for an aligned S band built on the second 0+, second vacuum configuration. Systematics of γ band members above 15+ in ¹⁰⁴Mo, ^{154,156,160,162,164}Dy, ^{156,160,164,170}Er, ¹⁸⁰Hf, ²³⁸U.

doi: 10.1103/PhysRevC.91.034330
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2015MA60      Phys.Rev. C 92, 054304 (2015)

D.A.Matters, N.Fotiades, J.J.Carroll, C.J.Chiara, J.W.McClory, T.Kawano, R.O.Nelson, M.Devlin

New transitions and feeding of the J^π = (8⁺) isomer in ¹⁸⁶Re

NUCLEAR REACTIONS ¹⁸⁷Re(n, 2n), E=10-25 MeV; measured Eγ, Iγ, nγ-, γγ-coin, time-of-flight for neutrons, excitation functions using GEANIE array at LANL-Neutron Science Center Weapons Neutron Research facility. ¹⁸⁶Re; deduced levels, J, π, improved energy of the long-lived (8+) isomer in ¹⁸⁶Re. Comparison with previous experimental results, and with COH 3.4 and TALYS 1.6 calculations.

doi: 10.1103/PhysRevC.92.054304
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2015PA16      Acta Phys.Pol. B46, 487 (2015)

E.S.Paul, J.M.Rees, P.Hampson, M.A.Riley, J.Simpson, A.D.Ayangeakaa, J.S.Baron, M.P.Carpenter, C.J.Chiara, U.Garg, D.J.Hartley, C.R.Hoffman, R.V.F.Janssens, F.G.Kondev, T.Lauritsen, P.J.R.Mason, J.Matta, S.L.Miller, P.J.Nolan, J.Ollier, M.Petri, D.C.Radford, J.P.Revill, X.Wang, S.Zhu, I.Ragnarsson

Recent Results at Ultrahigh Spin: Terminating States and Beyond in Mass 160 Rare-earth Nuclei

NUCLEAR REACTIONS ¹²⁴Sn(³⁷Cl, xn)¹⁵⁵Ho/¹⁵⁶Ho/¹⁵⁷Ho, E=180 MeV; measured reaction products, Eγ, Iγ; deduced energy levels, J, π, systematics.

doi: 10.5506/APhysPolB.46.487
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2015PR10      Phys.Rev. C 92, 061302 (2015)

C.J.Prokop, B.P.Crider, S.N.Liddick, A.D.Ayangeakaa, M.P.Carpenter, J.J.Carroll, J.Chen, C.J.Chiara, H.M.David, A.C.Dombos, S.Go, J.Harker, R.V.F.Janssens, N.Larson, T.Lauritsen, R.Lewis, S.J.Quinn, F.Recchia, D.Seweryniak, A.Spyrou, S.Suchyta, W.B.Walters, S.Zhu

New low-energy 0⁺ state and shape coexistence in ⁷⁰Ni

RADIOACTIVITY ^70,70mCo(β^-)[from ⁹Be(⁷⁶Ge, X), E=130 MeV/nucleon using A1900 fragment separator at NSCL-MSU]; measured Eγ, Iγ, βγγ-, γγ-coin, level half-life by βγ(t) using SeGA array and silicon PIN detectors. ⁷⁰Ni; deduced levels, J, π, energy and half-life of excited (0+) state, configuration. Comparison with Monte Carlo shell-model calculations with A3DA interaction. ⁶⁸Co, ⁶⁹Ni, ⁷⁰Zn; observed γ rays from decay of contaminants.

doi: 10.1103/PhysRevC.92.061302
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2015RE03      Phys.Rev. C 91, 054301 (2015)

J.M.Rees, E.S.Paul, J.Simpson, M.A.Riley, A.D.Ayangeakaa, M.P.Carpenter, C.J.Chiara, U.Garg, P.Hampson, D.J.Hartley, C.R.Hoffman, R.V.F.Janssens, F.G.Kondev, T.Lauritsen, P.J.R.Mason, J.Matta, S.L.Miller, P.J.Nolan, J.Ollier, M.Petri, D.C.Radford, J.P.Revill, X.Wang, S.Zhu, J.Gellanki, I.Ragnarsson

High-spin terminating states in the N=88 ¹⁵⁵Ho and ¹⁵⁶Er isotones

NUCLEAR REACTIONS ¹²⁴Sn(³⁷Cl, 6n)¹⁵⁵Ho, E=180 MeV; ¹¹⁴Cd(⁴⁸Ca, 6n)¹⁵⁶Er, E=215 MeV; measured Eγ, Iγ, γγ-coin, angular intensity ratios using Gammasphere array at ATLAS-ANL facility. ¹⁵⁵Ho, ¹⁵⁶Er; deduced high-spin levels, J, π, multipolarity, bands, non-collective oblate states in ¹⁵⁵Ho, γ-branching ratios and B(M1)/B(E2) for ¹⁵⁵Ho, alignments, configurations, staggering parameter; calculated Tilted Fermi-surface diagrams. Comparison with cranked Nilsson-Strutinsky calculations, and with structure of N=88 isotones ¹⁵⁴Dy, ¹⁵⁵Ho and ¹⁵⁶Er.

doi: 10.1103/PhysRevC.91.054301
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2015SH13      Acta Phys.Pol. B46, 619 (2015)

C.M.Shand, E.Wilson, Zs.Podolyak, H.Grawe, B.A.Brown, B.Fornal, R.V.F.Janssens, M.Bowry, M.Bunce, M.P.Carpenter, R.J.Carroll, C.J.Chiara, N.Cieplicka-Orynczak, A.Y.Deo, G.D.Dracoulis, C.R.Hoffman, R.S.Kempley, F.G.Kondev, G.J.Lane, T.Lauritsen, G.Lotay, M.W.Reed, P.H.Regan, C.Rodriguez Triguero, D.Seweryniak, B.Szpak, P.M.Walker, S.Zhu

Structure of ²⁰⁷Pb Populated in ²⁰⁸Pb + ²⁰⁸Pb Deep-inelastic Collisions

NUCLEAR REACTIONS ²⁰⁸Pb(²⁰⁸Pb, X)²⁰⁷Pb, E=1446 MeV; measured reaction products, Eγ, Iγ; deduced γ-ray energies, angular distributions of transitions, multipolarities, J, π. Comparison with shell model calculations.

doi: 10.5506/APhysPolB.46.619
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2015WI05      Phys.Lett. B 747, 88 (2015)

E.Wilson, Zs.Podolyak, H.Grawe, B.A.Brown, C.J.Chiara, S.Zhu, B.Fornal, R.V.F.Janssens, C.M.Shand, M.Bowry, M.Bunce, M.P.Carpenter, N.Cieplicka-Orynczak, A.Y.Deo, G.D.Dracoulis, C.R.Hoffman, R.S.Kempley, F.G.Kondev, G.J.Lane, T.Lauritsen, G.Lotay, M.W.Reed, P.H.Regan, C.Rodriguez Triguero, D.Seweryniak, B.Szpak, P.M.Walker

Core excitations across the neutron shell gap in ²⁰⁷Tl

NUCLEAR REACTIONS ²⁰⁸Pb(²⁰⁸Pb, X)²⁰⁷Tl, E=1446 MeV; measured reaction products, Eγ, Iγ; deduced γ-ray energies and intensities, J, π. Comparison with shell-model calculations.

doi: 10.1016/j.physletb.2015.04.055
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2014CI03      Acta Phys.Pol. B45, 205 (2014)

N.Cieplicka, B.Fornal, K.H.Maier, B.Szpak, R.Broda, W.Krolas, T.Pawlat, J.Wrzesinski, R.V.F.Janssens, M.P.Carpenter, C.J.Chiara, C.R.Hoffman, F.G.Kondev, T.Lauritsen, S.Zhu, Zs.Podolyak, M.Bowry, M.Bunce, W.Gelletly, R.Kempley, M.Reed, P.Regan, P.Walker, E.Wilson, A.Y.Deo, G.Dracoulis, G.Lane, C.Rodriguez Triguero

Angular Distributions of γ-Rays from ²¹⁰Bi Produced in ²⁰⁸Pb+²⁰⁸Pb Deep-inelastic Reactions

NUCLEAR REACTIONS ²⁰⁸Pb(²⁰⁸Pb, X)²¹⁰Bi, E=1446 MeV; measured reaction products, Eγ, Iγ; measured reaction products, Eγ, Iγ; deduced energy levels, J, π, γ-rays σ(θ).

doi: 10.5506/APhysPolB.45.205
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2014DO04      Phys.Rev. C 89, 045804 (2014)

D.T.Doherty, P.J.Woods, G.Lotay, D.Seweryniak, M.P.Carpenter, C.J.Chiara, H.M.David, R.V.F.Janssens, L.Trache, S.Zhu

Level structure of ³¹S: From low excitation energies to the region of interest for hydrogen burning in novae through the ³⁰(p, γ)³¹S reaction

NUCLEAR REACTIONS ²⁸Si(α, n), E=22 MeV; measured Eγ, Iγ, γγ-coin, γ(θ) using Gammasphere array at ATLAS-ANL facility. ³¹S; deduced levels, J, π, comparison with level structure in mirror nucleus ³¹P, mirror energy differences. Comparison with shell model calculations. Relevance for the ³⁰P(p, γ)³¹S reaction in ONe novae environments.

doi: 10.1103/PhysRevC.89.045804
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2014GA04      Phys.Rev. C 89, 024307 (2014);Erratum Phys.Rev. C 89, 059905 (2014)

L.P.Gaffney, M.Hackstein, R.D.Page, T.Grahn, M.Scheck, P.A.Butler, P.F.Bertone, N.Bree, R.J.Carroll, M.P.Carpenter, C.J.Chiara, A.Dewald, F.Filmer, C.Fransen, M.Huyse, R.V.F.Janssens, D.T.Joss, R.Julin, F.G.Kondev, P.Nieminen, J.Pakarinen, S.V.Rigby, W.Rother, P.Van Duppen, H.V.Watkins, K.Wrzosek-Lipska, S.Zhu

Shape coexistence in neutron-deficient Hg isotopes studied via lifetime measurements in ^{184, 186}Hg and two-state mixing calculations

NUCLEAR REACTIONS ¹⁴⁸Sm(⁴⁰Ar, 4n), E=200 MeV; ¹⁵⁰Sm(⁴⁰Ar, 4n), E=195 MeV; measured Eγ, Iγ, γγ-coin, level half-lives by RDDS method using Gammasphere and Cologne plunger device at ATLAS-ANL facility. ^184,186Hg; deduced levels, B(E2), transitional quadrupole moments, shape coexistence, deformation for normal and intruder bands. Comparison with two-state mixing model calculations. Systematics of yrast bands in even A=172-204 Hg isotopes.

NUCLEAR STRUCTURE ^{180,182,184,186,188}Hg; calculated rotational bands built on first two 0+ states, B(E2), wavefunction amplitudes using two-state mixing in VMI model.

doi: 10.1103/PhysRevC.89.024307
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2014GA07      Phys.Rev.Lett. 112, 112503 (2014)

A.Gade, R.V.F.Janssens, D.Weisshaar, B.A.Brown, E.Lunderberg, M.Albers, V.M.Bader, T.Baugher, D.Bazin, J.S.Berryman, C.M.Campbell, M.P.Carpenter, C.J.Chiara, H.L.Crawford, M.Cromaz, U.Garg, C.R.Hoffman, F.G.Kondev, C.Langer, T.Lauritsen, I.Y.Lee, S.M.Lenzi, J.T.Matta, F.Nowacki, F.Recchia, K.Sieja, S.R.Stroberg, J.A.Tostevin, S.J.Williams, K.Wimmer, S.Zhu

Nuclear Structure Towards N=40 ⁶⁰Ca: In-Beam γ-Ray Spectroscopy of ^{58, 60}Ti

NUCLEAR REACTIONS Be(⁶¹V, X)⁵⁸Ti/⁶⁰Ti, E=90 MeV/nucleon; measured reaction products, Eγ, Iγ, γ-γ-coin.; deduced energy levels, J, π, partial σ. Comparison with calculations using GXPF1A and LNPS spectroscopic factors, GRETINA at MSU.

doi: 10.1103/PhysRevLett.112.112503
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2014HA22      Phys.Rev. C 90, 017301 (2014)

D.J.Hartley, R.V.F.Janssens, L.L.Riedinger, M.A.Riley, X.Wang, S.Miller, A.D.Ayangeakaa, M.P.Carpenter, J.J.Carroll, J.Cavey, C.J.Chiara, P.Chowdhury, U.Garg, S.S.Hota, E.G.Jackson, F.G.Kondev, T.Lauritsen, M.Litz, W.C.Ma, J.Matta, E.S.Paul, E.E.Pedicini, J.Simpson, J.R.Vanhoy, S.Zhu

High-spin structure of odd-odd ¹⁷²Re

NUCLEAR REACTIONS ¹²⁰Sn(⁵⁵Mn, 3n), E=257 MeV; measured Eγ, Iγ, γγ, three- and higher-fold coincidences, γγ(θ) ratios using Gammasphere array at ATLAS-ANL facility. ¹⁷²Re; deduced high-spin levels, J, π, bands, configurations, alignment plots.

doi: 10.1103/PhysRevC.90.017301
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2014HE32      Phys.Rev.Lett. 113, 262505 (2014)

G.Henning, T.L.Khoo, A.Lopez-Martens, D.Seweryniak, M.Alcorta, M.Asai, B.B.Back, P.F.Bertone, D.Boilley, M.P.Carpenter, C.J.Chiara, P.Chowdhury, B.Gall, P.T.Greenlees, G.Gurdal, K.Hauschild, A.Heinz, C.R.Hoffman, R.V.F.Janssens, A.V.Karpov, B.P.Kay, F.G.Kondev, S.Lakshmi, T.Lauritsen, C.J.Lister, E.A.McCutchan, C.Nair, J.Piot, D.Potterveld, P.Reiter, A.M.Rogers, N.Rowley, S.Zhu

Fission Barrier of Superheavy Nuclei and Persistence of Shell Effects at High Spin: Cases of ²⁵⁴No and ²²⁰Th

NUCLEAR REACTIONS ²⁰⁸Pb(⁴⁸Ca, 2n), E=217, 220.5 MeV; ¹⁷⁶Yb(⁴⁸Ca, 4n), E=219 MeV; measured reaction products, Eγ, Iγ; deduced fission barrier heights. Comparisons with theoretical fission barriers test theories that predict properties of superheavy elements.

doi: 10.1103/PhysRevLett.113.262505
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2014HO16      Phys.Lett. B 739, 13 (2014)

S.S.Hota, P.Chowdhury, T.L.Khoo, M.P.Carpenter, R.V.F.Janssens, Y.Qiu, I.Ahmad, J.P.Greene, S.K.Tandel, D.Seweryniak, S.Zhu, P.F.Bertone, C.J.Chiara, A.Y.Deo, N.D'Olympia, S.Gros, C.J.Guess, T.Harrington, D.J.Hartley, G.Henning, C.R.Hoffman, E.G.Jacksona, F.G.Kondev, S.Lakshmi, T.Lauritsen, C.J.Lister, E.A.McCutchan, K.Moran, C.Nair, D.Peterson, U.Shirwadkar, I.Stefanescu

N=151 Pu, Cm and Cf nuclei under rotational stress: Role of higher-order deformations

NUCLEAR REACTIONS ²⁴⁴Pu, ²⁴⁹Cf(²⁰⁸Pb, X)²⁴²Pu/²⁴³Pu/²⁴⁴Pu/²⁴⁵Pu/²⁴⁶Pu/²⁴⁸Cf/²⁴⁹Cf/²⁵⁰Cf, ²⁴⁸Cm(²⁰⁹Bi, X)²⁴⁶Cm/²⁴⁷Cm/²⁴⁸Cm/²⁴⁹Cm/²⁵⁰Cm, E not given; measured reaction products, Eγ, Iγ. ²⁴⁵Pu, ²⁴⁷Cm, ²⁴⁹Cf; deduced energy levels, J, π, rotational bands, high-spins, deformations. Comparison with available data, Cranked WS model.

doi: 10.1016/j.physletb.2014.10.021
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2014IS04      Phys.Rev. C 89, 044324 (2014)

L.W.Iskra, R.Broda, R.V.F.Janssens, J.Wrzesinski, B.Szpak, C.J.Chiara, M.P.Carpenter, B.Fornal, N.Hoteling, F.G.Kondev, W.Krolas, T.Lauritsen, T.Pawlat, D.Seweryniak, I.Stefanescu, W.B.Walters, S.Zhu

Higher-seniority excitations in even neutron-rich Sn isotopes

NUCLEAR REACTIONS ²⁰⁸Pb, ²³⁸U(⁴⁸Ca, X), E=330 MeV; ²³⁸U(⁶⁴Ni, X), E=430 MeV; measured yields of fusion fission Te and complementary Sm reaction products, distribution of number of evaporated neutrons, Eγ, Iγ, γγ-coin, delayed γγ-coin, isomer half-lives using Gammasphere array at ATLAS-ANL facility. Identification of isotopes by prompt and delayed cross coincidences with γ rays from complementary A=146-156 Sm isotopes. ^{118,120,122,124,126,128}Sn; deduced high-spin levels, J, π, multipolarity, high-seniority states, isomers, B(E1), B(E2), B(E3). Comparison with shell model calculations with jj55pn interactions for ^{122,124,126,128,130}Sn nuclides. Systematics of yrast levels and B(Eλ) for A=116-132 even-even Sn isotopes.

doi: 10.1103/PhysRevC.89.044324
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2014LI32      Phys.Rev. C 90, 014320 (2014)

R.Lica, N.Marginean, D.G.Ghita, H.Mach, L.M.Fraile, G.S.Simpson, A.Aprahamian, C.Bernards, J.A.Briz, B.Bucher, C.J.Chiara, Z.Dlouhy, I.Gheorghe, P.Hoff, J.Jolie, U.Koster, W.Kurcewicz, R.Marginean, B.Olaizola, V.Paziy, J.M.Regis, M.Rudigier, T.Sava, M.Stanoiu, L.Stroe, W.B.Walters

Low-lying isomeric states in ⁸⁰Ga from the β^- decay of ⁸⁰Zn

RADIOACTIVITY ⁸⁰Zn(β^-)[from U(p, X), E=1.4 GeV]; measured Eγ, Iγ, γγ-, βγ-coin, half-life of 708-keV level in ⁸⁰Zn by βγγ(t) at ISOLDE-CERN facility. ⁸⁰Ga; deduced levels, ordering of the ground state and long-lived isomer, J, π, conversion coefficient, multipolarities, β feedings, logft, reduced transition probabilities. Comparison with shell model calculations using jj44bpn and JUN45 interactions.

doi: 10.1103/PhysRevC.90.014320
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2014NA15      Phys.Lett. B 728, 303 (2014)

F.Naqvi, V.Werner, P.Petkov, T.Ahn, N.Cooper, G.Ilie, D.Radeck, C.Bernards, M.P.Carpenter, C.J.Chiara, R.V.F.Janssens, F.G.Kondev, T.Lauritsen, D.Seweryniak, Ch.Stoyanov, S.Zhu

Test of the π g_7/2 subshell closure at Z = 58

NUCLEAR REACTIONS ²⁴Mg(¹³⁸Ce, ¹³⁸Ce'), E=480 MeV; ²⁴Mg(¹⁴²Ce, ¹⁴²Ce'), E=494 MeV; measured reaction products, Eγ, Iγ, particle-γ coin. ^138,142Ce; deduced g-factors, B(E2) values. Yale plunger device and Gammasphere array.

doi: 10.1016/j.physletb.2013.11.057
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2014RE12      Phys.Rev. C 90, 044318 (2014)

W.Reviol, R.V.F.Janssens, S.Frauendorf, D.G.Sarantites, M.P.Carpenter, X.Chen, C.J.Chiara, D.J.Hartley, K.Hauschild, T.Lauritsen, A.Lopez-Martens, M.Montero, O.L.Pechenaya, D.Seweryniak, J.B.Snyder, S.Zhu

Characterization of octupole-type structures in ²²¹Th

NUCLEAR REACTIONS ²⁰⁷Pb(¹⁸O, 4n), E=96 MeV; measured Eγ, Iγ, γγ-, (evaporation residues)γ-coin, γ(θ) using Gammasphere and HERCULES detector arrays at ATLAS-ANL facility. ²²¹Th; deduced high-spin levels, J, π, multipolarity, mixing ratio, bands, alternating-parity sequences and multiple octupole structures, B(E1)/B(E2) and B(M1)/B(E2) ratios, alignment plots. Systematics of octupole structures, parity splitting, and other properties in ^{218,219,220,221,222}Ra, ^{219,220,221,222,223,224}Th.

doi: 10.1103/PhysRevC.90.044318
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2014SU07      Phys.Rev. C 89, 034317 (2014)

S.Suchyta, S.N.Liddick, C.J.Chiara, W.B.Walters, M.P.Carpenter, H.L.Crawford, G.F.Grinyer, G.Gurdal, A.Klose, E.A.McCutchan, J.Pereira, S.Zhu

β decay of ^{61, 63}V and low-energy level schemes of ^{61, 63}Cr

RADIOACTIVITY ^61,63V(β^-), (β^-n)[from ⁹Be(⁷⁶Ge, X), E=130 MeV/nucleon]; measured Eγ, Iγ, γγ-, (fragment)γ-coin, I(β^-), half-lives of ^61,63V ground states using A1900 fragment separator, Beta Counting System (BCS) and Segmented Ge Array (SeGA) at NSCL-MSU facility. ^61,63Cr; deduced levels, J, π, %β^-n, internal-conversion coefficient, multipolarity, configurations. Comparison with shell-model calculations.

NUCLEAR STRUCTURE ^55,57,59,61Cr; calculated levels, J, π, configuration amplitudes using shell-model with GXPF1A and KB3G interactions. Comparison with experimental data.

doi: 10.1103/PhysRevC.89.034317
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2014SU11      Phys.Rev. C 89, 067303 (2014)

S.Suchyta, S.N.Liddick, C.J.Chiara, W.B.Walters, M.P.Carpenter, H.L.Crawford, G.F.Grinyer, G.Gurdal, A.Klose, E.A.McCutchan, J.Pereira, S.Zhu

β and isomeric decay of ⁶⁴V

RADIOACTIVITY ⁶⁴V(β^-)[from ⁹Be(⁷⁶Ge, X), E=130 MeV/nucleon]; measured Eγ, βγ-, (⁶⁴V)γ-coin, half-life of ⁶⁴V g.s. using A1900 fragment separator and SeGA array at NSCL-MSU facility. ⁶⁴Cr; deduced energy of first 2+ level. Systematics of first 2+ and 4+ states in A=54-64 even-even Cr nuclei.

NUCLEAR REACTIONS ⁹Be(⁷⁶Ge, X), E=130 MeV/nucleon; measured yields of reaction products, delayed Eγ. ⁶⁴V; deduced isomer and its half-life.

doi: 10.1103/PhysRevC.89.067303
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2013AL19      Phys.Rev. C 88, 054314 (2013)

M.Albers, S.Zhu, R.V.F.Janssens, J.Gellanki, I.Ragnarsson, M.Alcorta, T.Baugher, P.F.Bertone, M.P.Carpenter, C.J.Chiara, P.Chowdhury, A.N.Deacon, A.Gade, B.DiGiovine, C.R.Hoffman, F.G.Kondev, T.Lauritsen, C.J.Lister, E.A.McCutchan, D.S.Moerland, C.Nair, A.M.Rogers, D.Seweryniak

Single-particle and collective excitations in ⁶³Ni

NUCLEAR REACTIONS ²⁶Mg(⁴⁸Ca, 3n2α)⁶³Ni, E=275, 290, 320 MeV; measured Eγ, Iγ, γγ-, (recoils)γ-coin, γ(θ), γγ(θ), level half-lives by DSAM using FMA analyzer and Gammasphere array at ATLAS-ANL facility. ⁶³Ni; deduced high-spin levels, J, π, rotational bands, multipolarity, transition quadrupole moment and deformation parameter, alignment plots, configurations. Comparison with shell-model, and cranked Nilsson-Strutinsky calculations. Systematics of SD bands, high-deformation bands, and deformation parameters in ^{56,57,58,59,60,63}Ni, ^60,61,62,65Zn.

NUCLEAR STRUCTURE ⁶³Ni; calculated levels, J, π using shell-model with JUN45 and jj44b effective interactions. Comparison with experimental data.

doi: 10.1103/PhysRevC.88.054314
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2013AY04      Phys.Rev.Lett. 110, 172504 (2013)

A.D.Ayangeakaa, U.Garg, M.D.Anthony, S.Frauendorf, J.T.Matta, B.K.Nayak, D.Patel, Q.B.Chen, S.Q.Zhang, P.W.Zhao, B.Qi, J.Meng, R.V.F.Janssens, M.P.Carpenter, C.J.Chiara, F.G.Kondev, T.Lauritsen, D.Seweryniak, S.Zhu, S.S.Ghugre, R.Palit

Evidence for Multiple Chiral Doublet Bands in ¹³³Ce

NUCLEAR REACTIONS ¹¹⁶Cd(²²Ne, 5n)¹³³Ce, E=112 MeV; measured reaction products, Eγ, Iγ, γ-γ-coin.; deduced high-spin states energies, J, π, two distinct sets of criral-partner bands. Comparison with available data, relativistic mean field calculations.

doi: 10.1103/PhysRevLett.110.172504
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2013CH13      Acta Phys.Pol. B44, 371 (2013)

C.J.Chiara, W.B.Walters, R.V.F.Janssens, R.Broda, M.Albers, M.Alcorta, P.F.Bertone, M.P.Carpenter, C.R.Hoffman, T.Lauritsen, A.M.Rogers, D.Seweryniak, S.Zhu, F.G.Kondev, B.Fornal, W.Krolas, J.Wrzesinski, N.Larson, S.N.Liddick, C.Prokop, S.Suchyta, H.M.David, D.T.Doherty

Search for Intruder States in ⁶⁸Ni and ⁶⁷Co

NUCLEAR REACTIONS ²³⁸U, ²⁰⁸Pb, ¹⁹⁷Au(⁷⁰Zn, X)⁶⁸Ni/⁶⁷Co, E=440 MeV; measured reaction products, Eγ, Iγ, γ-γ-coin.; deduced level scheme, J, π, lack of evidence for intruder states.

doi: 10.5506/APhysPolB.44.371
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2013DA16      Phys.Lett. B 726, 665 (2013)

H.M.David, P.J.Woods, G.Lotay, D.Seweryniak, M.Albers, M.Alcorta, M.P.Carpenter, C.J.Chiara, T.Davinson, D.T.Doherty, C.R.Hoffman, R.V.F.Janssens, T.Lauritsen, A.M.Rogers, S.Zhu

Low-lying T = O states in the odd-odd N = Z nucleus ⁶²Ga

NUCLEAR REACTIONS ²⁴Mg(⁴⁰Ca, np)⁶²Ga, E=103 MeV; measured reaction products, Eγ, Iγ, Eβ, Iβ; deduced low-lying level energies, J, π. Comparison with shell model and IBM-4 calculations.

doi: 10.1016/j.physletb.2013.09.054
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2013HA02      Phys.Rev. C 87, 024315 (2013)

D.J.Hartley, R.V.F.Janssens, L.L.Riedinger, M.A.Riley, X.Wang, S.Miller, A.D.Ayangeakaa, P.F.Bertone, M.P.Carpenter, C.J.Chiara, P.Chowdhury, U.Garg, G.Gurdal, S.S.Hota, F.G.Kondev, T.Lauritsen, W.C.Ma, J.Matta, E.A.McCutchan, S.Mukhopadhyay, E.E.Pedicini, J.R.Vanhoy, S.Zhu

Multiple band structures in ^{169, 170}Re: Search for the wobbling mode in ¹⁶⁹Re, and residual-interaction analysis of structures in ¹⁷⁰Re

NUCLEAR REACTIONS ¹¹⁸Sn(⁵⁵Mn, X), E=260 MeV; measured Eγ, Iγ, γγ-coin, using the Gammasphere. ^169,170Re; deduced levels, J, π, B(M1)/B(E2), bands, configurations; calculated B(M1)/B(E2).

NUCLEAR STRUCTURE ^164,166,168Lu, ^{166,168,170,172}Ta, ^170,172,174Re, ¹⁷⁶Ir; calculated residual interactions. ^{163,165,167,169,171}Lu, ^{165,167,169,171,173}Ta, ^{169,171,173,175}Re, ^173,175,177Ir; calculated relative levels of πi_13/2, πh_9/2, πh_11/2 bands.

doi: 10.1103/PhysRevC.87.024315
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2013HA36      Phys.Rev. C 88, 044323 (2013)

D.J.Hartley, E.E.Pedicini, R.V.F.Janssens, L.L.Riedinger, M.A.Riley, X.Wang, S.Miller, A.D.Ayangeakaa, M.P.Carpenter, J.J.Carroll, J.Cavey, C.J.Chiara, P.Chowdhury, U.Garg, S.S.Hota, E.G.Jackson, F.G.Kondev, T.Lauritsen, M.Litz, W.C.Ma, J.Matta, E.S.Paul, J.Simpson, J.R.Vanhoy, S.Zhu

Possible deformation evolution in the π i_13/2 structure of ¹⁷¹Re

NUCLEAR REACTIONS ¹²⁰Sn(⁵⁵Mn, 4n), E=257 MeV; measured Eγ, Iγ, γγ-coin, three- and higher-fold coincidences, angular correlation ratios using Gammasphere array at ATLAS-ANL facility. ¹⁷¹Re; deduced high-spin levels, J, π, multipolarity, rotational bands, alignments, configurations, B(M1)/B(E2), moment of inertia plots. No evidence found for wobbling mode of excitation. Comparison with cranked shell-model calculations.

doi: 10.1103/PhysRevC.88.044323
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2013IS04      Acta Phys.Pol. B44, 395 (2013)

L.W.Iskra, R.Broda, J.Wrzesinski, M.P.Carpenter, C.J.Chiara, B.Fornal, N.Hoteling, R.V.F.Janssens, F.G.Kondev, W.Krolas, T.Lauritsen, T.Pawlat, D.Seweryniak, I.Stefanescu, W.B.Walters, S.Zhu

High-seniority Excitations in Even Neutron-rich Sn Isotopes Populated in Fusion-Fission Reactions

NUCLEAR REACTIONS ²⁰⁸Pb, ²³⁸U(⁴⁸Ca, X), E=330 MeV; ²³⁸U(⁶⁴Ni, X), E=430 MeV; measured fusion fission reaction products, Eγ, Iγ, γ-γ-coin. ^{118,119,120,121,122,123,124,125,126,128}Sn; deduced level energies, J, π, high-spin states, long-lived isomers.

doi: 10.5506/APhysPolB.44.395
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2013KU07      Phys.Rev. C 87, 044323 (2013)

I.Kuti, J.Timar, D.Sohler, E.S.Paul, K.Starosta, A.Astier, D.Bazzacco, P.Bednarczyk, A.J.Boston, N.Buforn, H.J.Chantler, C.J.Chiara, R.M.Clark, M.Cromaz, M.Descovich, Zs.Dombradi, P.Fallon, D.B.Fossan, C.Fox, A.Gizon, J.Gizon, A.A.Hecht, N.Kintz, T.Koike, I.Y.Lee, S.Lunardi, A.O.Macchiavelli, P.J.Nolan, B.M.Nyako, C.M.Petrache, J.A.Sampson, H.C.Scraggs, T.G.Tornyi, R.Wadsworth, A.Walker, L.Zolnai

Medium- and high-spin band structure of the chiral candidate ¹³²La

NUCLEAR REACTIONS ¹⁰⁰Mo(³⁶S, 3np), E=160 MeV; ¹¹⁶Cd(²³Na, 3nα), E=115 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ)(DCO), γ(θ, lin pol), conversion coefficients using the EUROBALL array at IReS, Strasbourg, and Gammasphere array. ¹³²La; deduced high-spin levels, J, π, multipolarity, bands, B(M1)/B(E2), alignments, Routhians, configurations, chiral partners. Comparison with band structure in ¹³⁴Pr.

doi: 10.1103/PhysRevC.87.044323
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2013RA17      Phys.Rev. C 88, 014307 (2013)

D.Radulov, C.J.Chiara, I.G.Darby, H.De Witte, J.Diriken, D.V.Fedorov, V.N.Fedosseev, L.M.Fraile, M.Huyse, U.Koster, B.A.Marsh, D.Pauwels, L.Popescu, M.D.Seliverstov, A.M.Sjodin, P.Van den Bergh, P.Van Duppen, M.Venhart, W.B.Walters, K.Wimmer

β decay of ⁶¹Mn to levels in ⁶¹Fe

RADIOACTIVITY ⁶¹Mn(β^-)[from ²³⁸U(p, F), E=1.4 GeV]; measured Eγ, Iγ, γγ-, βγ-coin, βγ(t), T_1/2 of ⁶¹Mn g.s., upper limit of P(n) to first 2+ state in ⁶⁰Fe at ISOLDE, CERN facility. Laser ionization and mass separation of ⁶¹Mn beam. ⁶¹Fe; deduced levels, J, π, β feedings, logft. Comparison with shell-model calculations. Systematics of ground and first excited states in ^{24,26,28,30,32,34,36}Mn.

NUCLEAR STRUCTURE ^59,61Fe; calculated levels J, π using shell model with GXPF1A and pf(g⁰) interactions. Comparison with experimental data.

doi: 10.1103/PhysRevC.88.014307
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2013RE11      Phys.Rev. C 88, 031304 (2013)

J.P.Revill, E.S.Paul, X.Wang, M.A.Riley, J.Simpson, R.V.F.Janssens, J.Ollier, A.J.Boston, M.P.Carpenter, C.J.Chiara, C.R.Hoffman, F.G.Kondev, T.Lauritsen, P.J.Nolan, J.M.Rees, S.V.Rigby, C.Unsworth, S.Zhu, I.Ragnarsson

Quadrupole moments of coexisting collective shapes at high spin in ¹⁵⁴Er

NUCLEAR REACTIONS ¹¹⁰Pd(⁴⁸Ti, 4n), E=215 MeV; measured Eγ, Iγ, γγ-coin, fractional Doppler-shift values F(τ) vs Eγ. ¹⁵⁴Er; deduced high-spin levels, triaxial strongly deformed (TSD), and superdeformed (SD) bands, transition quadrupole moments, configurations. Configuration-dependent cranked Nilsson-Strutinsky (CNS) calculations. Total energy surface calculations. Systematics of dynamic moment of inertia plots for bands in N=86 isotones ¹⁵²Dy, ¹⁵³Ho and ¹⁵⁴Er.

doi: 10.1103/PhysRevC.88.031304
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2013RE18      Phys.Rev. C 88, 041302 (2013)

F.Recchia, C.J.Chiara, R.V.F.Janssens, D.Weisshaar, A.Gade, W.B.Walters, M.Albers, M.Alcorta, V.M.Bader, T.Baugher, D.Bazin, J.S.Berryman, P.F.Bertone, B.A.Brown, C.M.Campbell, M.P.Carpenter, J.Chen, H.L.Crawford, H.M.David, D.T.Doherty, C.R.Hoffman, F.G.Kondev, A.Korichi, C.Langer, N.Larson, T.Lauritsen, S.N.Liddick, E.Lunderberg, A.O.Macchiavelli, S.Noji, C.Prokop, A.M.Rogers, D.Seweryniak, S.R.Stroberg, S.Suchyta, S.Williams, K.Wimmer, S.Zhu

Configuration mixing and relative transition rates between low-spin states in ⁶⁸Ni

NUCLEAR REACTIONS ²⁰⁸Pb(⁷⁰Zn, X)⁶⁸Ni, E=440 MeV; measured Eγ, Iγ, (⁶⁸Ni)γ-, γγ-coin, prompt and delayed γ rays, level half-life using Gammasphere array at ATLAS-ANL facility. ⁹Be(⁷⁰Ni, X)⁶⁸Ni, E=75 MeV/nucleon, [secondary ⁷⁰Ni beam from ⁹Be(⁸²Se, X), E=140 MeV/nucleon primary reaction]; measured Eγ, Iγ, γγ-coin, prompt and delayed γ rays, level half-life using S800 spectrograph, GRETINA and CsI(Na) arrays at NSCL-MSU facility. ⁶⁸Ni; deduced levels, J, π, B(E2) ratios. Comparison with shell-model calculations using jj44pna, jj44b, JUN45, and LNPS effective interactions. Discussed configuration mixing.

doi: 10.1103/PhysRevC.88.041302
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2013SN01      Phys.Lett. B 723, 61 (2013)

J.B.Snyder, W.Reviol, D.G.Sarantites, A.V.Afanasjev, R.V.F.Janssens, H.Abusara, M.P.Carpenter, X.Chen, C.J.Chiara, J.P.Greene, T.Lauritsen, E.A.McCutchan, D.Seweryniak, S.Zhu

High-spin transition quadrupole moments in neutron-rich Mo and Ru nuclei: Testing γ softness?

RADIOACTIVITY ²⁵²Cf(SF); measured decay products, Eγ, Iγ. ^{102,104,106,108}Mo, ^108,110,112Ru; deduced energy levels, J, π, kinematic and dynamic moments of inertia, B(E2), transition quadrupole moments, potential energy surfaces. Comparison with available data.

doi: 10.1016/j.physletb.2013.04.046
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2013TO05      Phys.Rev. C 87, 041304 (2013)

Y.Toh, C.J.Chiara, E.A.McCutchan, W.B.Walters, R.V.F.Janssens, M.P.Carpenter, S.Zhu, R.Broda, B.Fornal, B.P.Kay, F.G.Kondev, W.Krolas, T.Lauritsen, C.J.Lister, T.Pawlat, D.Seweryniak, I.Stefanescu, N.J.Stone, J.Wrzesinski, K.Higashiyama, N.Yoshinaga

Evidence for rigid triaxial deformation at low energy in ⁷⁶Ge

NUCLEAR REACTIONS ²³⁸U(⁷⁶Ge, ⁷⁶Ge'), E=530 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ) using Gammasphere array at ATLAS facility in ANL. ⁷⁶Ge; deduced high-spin levels, bands, multipolarity, mixing ratios, J, π, B(E2), staggering. Comparison with collective- and shell-model calculations. Evidence of rigid triaxial deformation in the low-lying states of ⁷⁶Ge. Systematics of staggering parameter for γ bands in ^74,76,78Se, ⁷⁶Ge, ^76,78,80Kr nuclei.

doi: 10.1103/PhysRevC.87.041304
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2013WI01      Acta Phys.Pol. B44, 381 (2013)

E.Wilson, Zs.Podolyak, B.Fornal, R.V.F.Janssens, M.Bowry, M.Bunce, M.P.Carpenter, C.J.Chiara, N.Cieplicka, A.Y.Deo, G.D.Dracoulis, H.Grawe, C.R.Hoffman, R.S.Kempley, F.G.Kondev, G.J.Lane, T.Lauritsen, M.W.Reed, P.H.Regan, C.Rodriguez Triguero, B.Szpak, P.M.Walker, S.Zhu

Core Excitations Across the Neutron Shell Gap in ²⁰⁷Tl

NUCLEAR REACTIONS ²⁰⁸Pb(²⁰⁸Pb, X)²⁰⁷Tl/²⁰⁹Bi, E=1446 MeV; measured reaction products, Eγ, Iγ, γ-γ-γ-coin.; deduced transition energies and intensities. Comparison with available data.

doi: 10.5506/APhysPolB.44.381
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2012BE11      Phys.Rev. C 85, 044305 (2012)

P.C.Bender, S.L.Tabor, V.Tripathi, C.R.Hoffman, L.Hamilton, A.Volya, R.M.Clark, P.Fallon, A.O.Macchiavelli, S.Paschalis, M.Petri, M.P.Carpenter, R.V .F.Janssens, T.Lauritsen, E.A.McCutchan, D.Seweryniak, S.Zhu, C.J.Chiara, X.Chen, W.Reviol, D.G.Sarantites, Y.Toh

Multi-intruder structures in ³⁴P

NUCLEAR REACTIONS ¹⁸O(¹⁸O, np), E=24 MeV; measured Eγ, Iγ, γ(θ), γγ-, (proton)γ-coin, half-lives by DSA using Gammasphere array and Microball. ³⁴P; deduced levels, J, π, branching ratios, multipolarity, mixing ratio, B(M1), B(E1), B(E2), B(M2), B(E3) strengths. Comparisons with shell-model calculations.

doi: 10.1103/PhysRevC.85.044305
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2012BR15      Phys.Rev. C 86, 064312 (2012)

R.Broda, T.Pawlat, W.Krolas, R.V.F.Janssens, S.Zhu, W.B.Walters, B.Fornal, C.J.Chiara, M.P.Carpenter, N.Hoteling, L.W.Iskra, F.G.Kondev, T.Lauritsen, D.Seweryniak, I.Stefanescu, X.Wang, J.Wrzesinski

Spectroscopic study of the ^{64, 66, 68}Ni isotopes populated in ⁶⁴Ni+²³⁸U collisions

NUCLEAR REACTIONS ²³⁸U(⁶⁴Ni, X), E=430 MeV; measured Eγ, Iγ, γγ(θ), γγ-coin, delayed γγ-coin using Gammasphere array at ANL facility. ^64,66,68Ni; deduced levels, J, π. Comparison with shell-model calculations. Quasielastic and deep-inelastic reactions.

NUCLEAR STRUCTURE ^64,66,68Ni; calculated levels, J, π, configuration mixtures using large-scale shell-model with jj44b and jun45 interactions.

doi: 10.1103/PhysRevC.86.064312
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2012CH09      Phys.Rev. C 85, 024309 (2012)

C.J.Chiara, I.Stefanescu, W.B.Walters, S.Zhu, R.V.F.Janssens, M.P.Carpenter, R.Broda, B.Fornal, A.A.Hecht, N.Hoteling, E.G.Jackson, B.P.Kay, W.Krolas, T.Lauritsen, E.A.McCutchan, T.Pawlat, D.Seweryniak, X.Wang, A.Wohr, J.Wrzesinski

Core-coupled protons, F_7/2 intruder states, and competing G_9/2 proton and neutron structures in ^{65, 67}Cu

NUCLEAR REACTIONS ²³⁸U(⁶⁴Ni, X)⁶⁵Cu/⁶⁷Cu, E=430 MeV; measured Eγ, Iγ, γγ-coin, γ(θ), γγ(θ) using Gammasphere array and ATLAS facility at ANL. ^65,67Cu; deduced levels, J, π, multipolarity, mixing ratios, configurations. Systematics of 7/2- and positive-parity states in A=57-71 Cu isotopes, and 2+ and 5- states in A=56-70 Ni isotopes. Systematics of ground-state bands in ^60,66,68,70Zn and compared with those of f_7/2- proton bands in ^59,65,67,69Cu. Comparison with shell model calculations using JUN45 and jj44b interactions.

doi: 10.1103/PhysRevC.85.024309
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2012CH39      Phys.Rev. C 86, 041304 (2012)

C.J.Chiara, R.Broda, W.B.Walters, R.V.F.Janssens, M.Albers, M.Alcorta, P.F.Bertone, M.P.Carpenter, C.R.Hoffman, T.Lauritsen, A.M.Rogers, D.Seweryniak, S.Zhu, F.G.Kondev, B.Fornal, W.Krolas, J.Wrzesinski, N.Larson, S.N.Liddick, C.Prokop, S.Suchyta, H.M.David, D.T.Doherty

Low-spin states and the non-observation of a proposed 2202-keV, o⁺ isomer in ⁶⁸Ni

NUCLEAR REACTIONS ¹⁹⁷Au, ²⁰⁸Pb, ²³⁸U(⁷⁰Zn, X), E=430, 440 MeV; measured Eγ, Iγ, (particle)γ-, γγ-coin, γγ(θ), prompt and delayed γ using Gammasphere array at ATLAS facility in ANL. ⁶⁸Ni; deduced levels, J, π, T_1/2, multipolarity and mixing ratio. Non-observation of a previously reported 0+ isomer in ⁶⁸Ni.

doi: 10.1103/PhysRevC.86.041304
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2012CI05      Phys.Rev. C 86, 054322 (2012)

N.Cieplicka, K.H.Maier, B.Fornal, B.Szpak, R.V.F.Janssens, M.Alcorta, R.Broda, M.P.Carpenter, C.J.Chiara, C.R.Hoffman, B.P.Kay, F.G.Kondev, W.Krolas, T.Lauritsen, C.J.Lister, E.A.McCutchan, T.Pawlat, A.M.Rogers, D.Seweryniak, N.Sharp, W.B.Walters, J.Wrzesinski, S.Zhu

Yrast structure of ²⁰⁶Bi: Isomeric states and one-proton-particle, three-neutron-hole excitations

NUCLEAR REACTIONS ²⁰⁸Pb(⁷⁶Ge, X), E=450 MeV; measured Eγ, Iγ, γ(θ), γγ-coin. ²⁰⁶Bi; deduced levels, J, π, T_1/2, multipolarity, mixing ratio, configurations. Comparison with shell-model calculations.

doi: 10.1103/PhysRevC.86.054322
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