NSR Query Results


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NSR database version of May 24, 2024.

Search: Author = M.Carpenter

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2024LA01      Phys.Rev. C 109, 024309 (2024)

S.Lalkovski, F.G.Kondev, K.Auranen, A.D.Ayangeakaa, M.P.Carpenter, J.A.Clark, P.Copp, N.P.Giha, D.J.Hartley, T.Lauritsen, S.Marley, G.E.Morgan, C.Muller-Gatermann, S.Nandi, W.Reviol, D.Santiago-Gonzalez, G.Savard, D.Seweryniak, Ir.B.Vasilev, J.Wu

Structure of the high-spin, β-decaying state in the neutron-rich nucleus 146La

doi: 10.1103/PhysRevC.109.024309
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2024LO03      Nucl.Instrum.Methods Phys.Res. A1062, 169228 (2024)

S.Lopez-Caceres, S.T.Marley, M.P.Carpenter, G.Savard, F.G.Kondev, P.Copp, W.Reviol, C.Muller-Gatermann, D.Seweryniak, J.A.Clark, D.Santiago-Gonzalez, G.E.Morgan, A.J.Mitchell, G.L.Wilson, M.L.Smith

The LSU-Argonne conversion electron spectrometer: A new detector for the X-Array and SATURN decay station

RADIOACTIVITY 150Ce, 150Pr(β-); measured decay products, Eβ, Iβ, X-rays; deduced T1/2 via conversion electrons emission. Comparison with available data. The LSU-Argonne Conversion Electron Spectrometer (LACES), the ATLAS/CARIBU facility at Argonne National Laboratory.

doi: 10.1016/j.nima.2024.169228
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2024PR03      Phys.Rev. C 109, 034301 (2024)

M.Prajapati, S.Nag, A.K.Singh, A.Al-Khatib, H.Hubel, A.Neusser-Neffgen, G.B.Hagemann, G.Sletten, B.Herskind, C.R.Hansen, G.Benzoni, A.Bracco, R.V.F.Janssens, M.P.Carpenter, P.Chowdhury

Possible wobbling phenomenon in 125Xe

doi: 10.1103/PhysRevC.109.034301
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2024SA09      Phys.Rev. C 109, 024319 (2024)

A.Saracino, S.Zhu, N.Sensharma, A.D.Ayangeakaa, R.V.F.Janssens, Q.B.Chen, M.P.Carpenter, P.Chowdhury, A.Gade, F.G.Kondev, T.M.Kowalewski, T.Lauritsen, E.A.McCutchan, D.Seweryniak

Collective modes of excitation in 64Cu

doi: 10.1103/PhysRevC.109.024319
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2024TR01      Phys.Rev. C 109, 044320 (2024)

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, R.Jain, B.Longfellow, S.Luitel, M.Mogannam, T.H.Ogunbeku, A.L.Richard, S.Saha, N.Shimizu, O.A.Shehu, Y.Utsuno, R.Unz, Y.Xiao, S.Yoshida, Y.Zhu

Low spin spectroscopy of neutron-rich 43, 44, 45Cl via β- and βn decay

doi: 10.1103/PhysRevC.109.044320
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2024WU04      Phys.Rev. C 109, 024314 (2024)

J.Wu, M.P.Carpenter, F.G.Kondev, R.V.F.Janssens, S.Zhu, E.A.McCutchan, A.D.Ayangeakaa, J.Chen, J.Clark, D.J.Hartley, T.Lauritsen, N.Pietralla, G.Savard, D.Seweryniak, V.Werner

Determination of the spins and parities for the 04+ and 05+ states in 100Zr

doi: 10.1103/PhysRevC.109.024314
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2023AN09      Phys.Rev. C 108, 034303 (2023)

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

α decay of the neutron-deficient isotope 190At

doi: 10.1103/PhysRevC.108.034303
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2023AY02      Phys.Rev. C 107, 044314 (2023)

A.D.Ayangeakaa, R.V.F.Janssens, S.Zhu, J.M.Allmond, B.A.Brown, C.Y.Wu, M.Albers, K.Auranen, B.Bucher, M.P.Carpenter, P.Chowdhury, D.Cline, H.L.Crawford, P.Fallon, A.M.Forney, A.Gade, D.J.Hartley, A.B.Hayes, J.Henderson, F.G.Kondev, Krishichayan, T.Lauritsen, J.Li, D.Little, A.O.Macchiavelli, D.Rhodes, D.Seweryniak, S.M.Stolze, W.B.Walters, J.Wu

Triaxiality and the nature of low-energy excitations in 76Ge

NUCLEAR REACTIONS 208Pb(76Ge, 76Ge'), E=291, 304, 317 MeV; measured Eγ, Iγ, (76Ge)γ-coin using the GRETINA array with 28 Ge crystals in one experiment at 304-MeV beam energy, and 42 Ge crystals in a second experiment at 291- and 317-MeV beam energies, both in coincidence with scattered particles detected by using the CHICO2 array of position-sensitive parallel plate avalanche counters at the ATLAS-ANL facility. 76Ge; deduced levels, Jπ, γ-ray and Coulomb excitation yields analyzed by using the semiclassical, coupled-channel, Coulomb excitation least-squares code GOSIA, constrained by certain previouly known experimental nuclear structure parameters, E2, M1, E1 and E3 matrix elements, B(E2), B(M1), B(E1) and B(E3), spectroscopic quadrupole moments for five excited states, and evidence for rigid triaxial deformation at low excitation energies in 76Ge, and magnitudes of the quadrupole invariants Q+2, and expectation values of the quadrupole asymmetry parameters cos(3γ) for the members of the ground-state and the γ bands. Comparison with configuration interaction shell-model calculations and generalized triaxial rotor model, and with previous experimental data.

doi: 10.1103/PhysRevC.107.044314
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2023BH05      Phys.Rev. C 108, 024312 (2023)

S.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 T1/2, 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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2023CA13      Phys.Rev. C 108, 035807 (2023)

L.Canete, D.T.Doherty, G.Lotay, D.Seweryniak, C.M.Campbell, M.P.Carpenter, W.N.Catford, K.A.Chipps, J.Henderson, R.G.Izzard, R.V.F.Janssens, H.Jayatissa, J.Jose, A.R.L.Kennington, F.G.Kondev, A.Korichi, T.Lauritsen, C.Muller-Gatermann, C.Paxman, Zs.Podolyak, B.J.Reed, P.H.Regan, W.Reviol, M.Siciliano, G.L.Wilson, R.Yates, S.Zhu

Confirmation of a new resonance in 26Si and contribution of classical novae to the galactic abundance of 26Al

doi: 10.1103/PhysRevC.108.035807
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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 T1/2. 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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2023GR04      Phys.Rev.Lett. 130, 242501 (2023)

T.J.Gray, J.M.Allmond, Z.Xu, T.T.King, R.S.Lubna, H.L.Crawford, V.Tripathi, B.P.Crider, R.Grzywacz, S.N.Liddick, A.O.Macchiavelli, T.Miyagi, A.Poves, A.Andalib, E.Argo, C.Benetti, S.Bhattacharya, C.M.Campbell, M.P.Carpenter, J.Chan, A.Chester, J.Christie, B.R.Clark, I.Cox, A.A.Doetsch, J.Dopfer, J.G.Duarte, P.Fallon, A.Frotscher, T.Gaballah, J.T.Harke, J.Heideman, H.Huegen, J.D.Holt, R.Jain, N.Kitamura, K.Kolos, F.G.Kondev, A.Laminack, B.Longfellow, S.Luitel, M.Madurga, R.Mahajan, M.J.Mogannam, C.Morse, S.Neupane, A.Nowicki, T.H.Ogunbeku, W.-J.Ong, C.Porzio, C.J.Prokop, B.C.Rasco, E.K.Ronning, E.Rubino, T.J.Ruland, K.P.Rykaczewski, L.Schaedig, D.Seweryniak, K.Siegl, M.Singh, A.E.Stuchbery, S.L.Tabor, T.L.Tang, T.Wheeler, J.A.Winger, J.L.Wood

Microsecond Isomer at the N=20 Island of Shape Inversion Observed at FRIB

RADIOACTIVITY 32Na(IT), (β-) [from 9Be(48Ca, X), E=172.3 MeV/nucleon]; measured decay products, Eγ, Iγ; deduced γ-ray energies, partial level scheme, isomeric T1/2, B(E2), single-particle occupancies. Comparison with calculations. The Advanced Rare Isotope Separator (ARIS), the FRIB Decay Station initiator (FDSi).

doi: 10.1103/PhysRevLett.130.242501
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2023HA30      Phys.Rev. C 108, 024307 (2023)

D.J.Hartley, F.G.Kondev, M.P.Carpenter, J.A.Clark, P.Copp, B.Kay, T.Lauritsen, G.Savard, D.Seweryniak, G.L.Wilson, J.Wu

First b--decay spectroscopy study of 157Nd

RADIOACTIVITY 157Nd(β-)[from 252Cf(SF)]; measured Eγ, Iγ, Eβ, Iβ, βγ-coin, βγγ-coin; deduced T1/2, logft, branchings, β-feedings. 157Pm; deduced levels, J, π, configurations. Systematics of relative energies of quasiproton orbitals observed in promethium, europium, and terbium N =90, 92, 94, and 96 nuclei - 151Pm, 153Pm, 155Pm, 157Pm, 153Eu, 155Pm, 157Pm, 159Pm, 155Tb, 157Tb, 159Tb, 161Tb. Separated A=157 beam from CARIBU source delivered to the SATURN moving tape collection system, which was surrounded by X-Array spectrometer comprised of 5 germanium clover detectors plastic scintillators.

doi: 10.1103/PhysRevC.108.024307
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2023HO06      Phys.Rev. C 107, 064311 (2023)

C.R.Hoffman, R.S.Lubna, E.Rubino, S.L.Tabor, K.Auranen, P.C.Bender, C.M.Campbell, M.P.Carpenter, J.Chen, M.Gott, J.P.Greene, D.E.M.Hoff, T.Huang, H.Iwasaki, F.G.Kondev, T.Lauritsen, B.Longfellow, C.Santamaria, D.Seweryniak, T.L.Tang, G.L.Wilson, J.Wu, S.Zhu

Experimental study of the 38S excited level scheme

NUCLEAR REACTIONS 18O(22Ne, 2p)38S, E=48.5 MeV; measured recoils, Eγ, Iγ γγ-coin, γγ(θ) (recoils)γ-coin. 38S; deduced levels, J, π, δ, ratio of the angular yields, configurations, occupancy numbers. Machine-learning techniques used in the analysis of the data. Comparison to shell-model calculations with FSU interaction. Systematics of yrast states properties for 36Si, 38S, 40Ar, 42Ca. GRETINA array consisting of 12 HPGe modules coupled with Fragment Mass Analyzer (FMA) at Argonne Tandem Linear Accelerator System (ATLAS) facility (ANL).

doi: 10.1103/PhysRevC.107.064311
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2023LU07      Phys.Rev. C 108, 014329 (2023)

R.S.Lubna, S.N.Liddick, T.H.Ogunbeku, A.Chester, J.M.Allmond, S.Bhattacharya, C.M.Campbell, M.P.Carpenter, K.L.Childers, P.Chowdhury, J.Christie, B.R.Clark, R.M.Clark, I.Cox, H.L.Crawford, B.P.Crider, A.A.Doetsch, P.Fallon, A.Frotscher, T.Gaballah, T.J.Gray, R.Grzywacz, J.T.Harke, A.C.Hartley, R.Jain, T.T.King, N.Kitamura, K.Kolos, F.G.Kondev, E.Lamere, R.Lewis, B.Longfellow, S.Lyons, S.Luitel, M.Madurga, R.Mahajan, M.J.Mogannam, C.Morse, S.K.Neupane, W.-J.Ong, D.Perez-Loureiro, C.Porzio, C.J.Prokop, A.L.Richard, E.K.Ronning, E.Rubino, K.Rykaczewski, D.Seweryniak, K.Siegl, U.Silwal, M.Singh, D.P.Siwakoti, D.C.Smith, M.K.Smith, S.L.Tabor, T.L.Tang, V.Tripathi, A.Volya, T.Wheeler, Y.Xiao, Z.Xu

β decay of 36Mg and 36Al: Identification of a β-decaying isomer in 36Al

RADIOACTIVITY 36Mg, 36Al(β-)[from 9Be(48Ca, X), E=140 MeV/nucleon for experiment at NSCL and 9Be(48Ca, X), E=172.3 MeV/nucleon for experiment at FRIB]; 36Al, 36mAl(β-)[from 36Mg(β-); measured Eγ, Iγ; deduced T1/2. 36Al; deduced levels, J, π, newly-observed β-decaying isomer, T1/2 of the isomer. 36Si; deduced levels, J, π. Comparison to shell model calculations performed with the FSU interaction using code CoSMo. For experiment at NSCL - CeBr3 based implantation detector with position-sensitive photomultiplier tube was surrounded by 16 segmented germanium detectors (SeGa) and 15 LaBr3 detectors. For experiment at FRIB - YSO scintillator based implantation detector segmented into 48x48 pixels was surrounded by 11 HPGe clover detectors and LaBr3 detectors from one side and the neutron detector array VANDLE from the other side.

doi: 10.1103/PhysRevC.108.014329
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2023SE09      Phys.Rev. C 107, L061302 (2023)

D.Seweryniak, T.Huang, K.Auranen, A.D.Ayangeakaa, B.B.Back, M.P.Carpenter, P.Chowdhury, R.M.Clark, P.A.Copp, Z.Favier, K.Hauschild, X.-T.He, T.L.Khoo, F.G.Kondev, A.Korichi, T.Lauritsen, J.Li, C.Morse, D.H.Potterveld, G.Savard, S.Stolze, J.Wu, J.Zhang, Y.-F.Xu

Nuclear rotation at the fission limit in 254Rf

NUCLEAR REACTIONS 206Pb(50Ti, 2n)254Rf, E=244 MeV from the ATLAS-ANL facility; measured reaction products, prompt γ rays, Eγ, Iγ, Rf Kα and Kβ x-rays, (254Rf implants)γ-coin, (implants)(fission events)γ-coin using the Gammasphere array and the Argonne gas-filled analyzer (AGFA). 254Rf; deduced levels, J, π, ground-state rotational band up to 14+, kinematic moment of inertia. Systematics of ground-state bands in 250Fm, 252,254No, and 254,256Rf, and comparison with particle-number conserving cranked shell model (PNC-CSM) calculations.

doi: 10.1103/PhysRevC.107.L061302
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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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2022AY02      Phys.Rev. C 105, 054315 (2022)

A.D.Ayangeakaa, N.Sensharma, M.Fulghieri, R.V.F.Janssens, Q.B.Chen, S.Zhu, M.Alcorta, M.P.Carpenter, P.Chowdhury, A.Gade, C.R.Hoffman, F.G.Kondev, T.Lauritsen, E.A.McCutchan, A.M.Rogers, D.Seweryniak

Single-particle and collective excitations in 66Zn

NUCLEAR REACTIONS 26Mg(48Ca, 4nα), E=275, 290, 320 MeV; measured Eγ, Iγ, γ(θ), γγ-coin. 66Zn; deduced levels, J, π, angular correlation ratios, experimental angular distribution coefficients, δ, rotational bands structure, high-spin states. Comparison to spherical shell-model calculations using the jj44b and JUN45 effective interactions. Experimental data on rotational band is compared to the calculations made within configuration-fixed constrained covariant density functional theory (CDFT) and the quantum particle rotor model (PRM) formalism. Systematics for superderformed bands in 60Zn, 66Zn, 68Zn, 68Ge. Gammasphere array with 101 detectors in conjunction with the fragment mass analyzer (FMA) and a microchannel plate (MCP) detector at ATLAS accelerator (ANL).

doi: 10.1103/PhysRevC.105.054315
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2022BE27      Nucl.Instrum.Methods Phys.Res. A1040, 167113 (2022)

L.Begley, S.Zhu, M.P.Carpenter, J.T.Anderson, R.V.F.Janssens, T.Lauritsen, E.A.McCutchan, M.B.Oberling, D.Seweryniak, P.Wilt

Algorithms of pulse shape analysis for Gammasphere under high count rate conditions

doi: 10.1016/j.nima.2022.167113
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2022BO04      Phys.Rev. C 105, 044327 (2022)

V.Bothe, S.K.Tandel, S.G.Wahid, P.C.Srivastava, B.Bhoy, P.Chowdhury, R.V.F.Janssens, F.G.Kondev, M.P.Carpenter, T.Lauritsen, D.Seweryniak, S.Zhu

Isomers in 203Tl and core excitations built on a five-nucleon-hole structure

NUCLEAR REACTIONS 197Au(209Bi, X)203Tl, E=1450 MeV; measured Eγ, Iγ, γγ-coin, γγγ-coin. 203Tl; deduced levels, J, π, multipolarities, T1/2 of high-spin isomeric states, configurations. Half-lives determined by centroid-shift method for ns isomers and by variation with time of the cumulative intensity for υs isomers. Observed octupole core excitations built on a five-nucleon hole configuration. Comparison with shell-model calculations employing the KHH7B effective interaction. Gammasphere array with 100 detectors at ATLAS accelerator (ANL).

doi: 10.1103/PhysRevC.105.044327
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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, T1/2 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 72,74,76,78,80Ga. 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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2022CR03      Phys.Rev.Lett. 129, 212501 (2022)

H.L.Crawford, V.Tripathi, J.M.Allmond, B.P.Crider, R.Grzywacz, S.N.Liddick, A.Andalib, E.Argo, C.Benetti, S.Bhattacharya, C.M.Campbell, M.P.Carpenter, J.Chan, A.Chester, J.Christie, B.R.Clark, I.Cox, A.A.Doetsch, J.Dopfer, J.G.Duarte, P.Fallon, A.Frotscher, T.Gaballah, T.J.Gray, J.T.Harke, J.Heideman, H.Heugen, R.Jain, T.T.King, N.Kitamura, K.Kolos, F.G.Kondev, A.Laminack, B.Longfellow, R.S.Lubna, S.Luitel, M.Madurga, R.Mahajan, M.J.Mogannam, C.Morse, S.Neupane, A.Nowicki, T.H.Ogunbeku, W.-J.Ong, C.Porzio, C.J.Prokop, B.C.Rasco, E.K.Ronning, E.Rubino, T.J.Ruland, K.P.Rykaczewski, L.Schaedig, D.Seweryniak, K.Siegl, M.Singh, S.L.Tabor, T.L.Tang, T.Wheeler, J.A.Winger, Z.Xu

Crossing N = 28 Toward the Neutron Drip Line: First Measurement of Half-Lives at FRIB

RADIOACTIVITY 44,45P, 42,43Si, 39,40,41Al, 36,37,38Mg, 35Na, 32Ne, 29F(β-), (β-n), (β-2n) [from 9Be(48Ca, X), E=172.3 MeV/nucleon]; measured decay products, Eβ, Iβ, En, In; deduced T1/2. Comparison with the latest quasiparticle random phase approximation and shell-model calculations and available data. The Facility for Rare Isotope Beams (FRIB) with the FRIB decay station initiator.

doi: 10.1103/PhysRevLett.129.212501
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2022GR08      Phys.Lett. B 834, 137446 (2022)

T.J.Gray, J.M.Allmond, R.V.F.Janssens, W.Korten, A.E.Stuchbery, J.L.Wood, A.D.Ayangeakaa, S.Bottoni, B.M.Bucher, C.M.Campbell, M.P.Carpenter, H.L.Crawford, H.David, D.T.Doherty, P.Fallon, M.T.Febbraro, A.Galindo-Uribarri, C.J.Gross, M.Komorowska, F.G.Kondev, T.Lauritsen, A.O.Macchiavelli, P.Napiorkowsi, E.Padilla-Rodal, S.D.Pain, W.Reviol, D.G.Sarantites, G.Savard, D.Seweryniak, C.Y.Wu, C.-H.Yu, S.Zhu

E2 rotational invariants of 01+ and 21+ states for 106Cd: The emergence of collective rotation

NUCLEAR REACTIONS 208Pb(106Cd, 106Cd'), E=3.849 MeV/nucleon; measured Doppler-corrected γ-ray spectra, Eγ, Iγ, (106Cd)γ-coin using GRETINA array with 32 HPGe crystals for γ detection, and CHICO array for particles at the ATLAS-ANL facility. 106Cd; deduced levels, J, π, E2 and E3 matrix elements using GOSIA analysis code, E2 transition strengths, spectroscopic quadrupole moments, electric quadrupole invariants (Kumar-Cline sum rules) Q3cos(3δ), axial-symmetry parameter δ. Comparison with beyond mean-field (BMF) and shell-model calculations, and with previous experimental data.

doi: 10.1016/j.physletb.2022.137446
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2022HA01      Phys.Rev. C 105, 014301 (2022)

D.J.Hartley, F.G.Kondev, M.P.Carpenter, R.V.F.Janssens, M.A.Riley, K.Villafana, K.Auranen, A.D.Ayangeakaa, J.S.Baron, A.J.Boston, J.A.Clark, J.P.Greene, J.Heery, C.R.Hoffman, T.Lauritsen, J.Li, D.Little, E.S.Paul, G.Savard, D.Seweryniak, J.Simpson, S.Stolze, G.L.Wilson, J.Wu, S.Zhu

νi13/2 structures in 155Sm and 159Gd: Supporting evidence of a Z=60 deformed subshell gap

NUCLEAR REACTIONS 154Sm(160Gd, n), E=1000 MeV from the ATLAS facility of the Argonne National Laboratory. Measured Eγ, Iγ, γγ-coin using Gammasphere array with 73 Compton-suppressed HPGe detectors. 155Sm, 159Gd; deduced high-spin levels, J, π, νi13/2 bands, with the two signature partners, alignments and signature splitting. Discussed systematics of νi13/2 structures in N=91, 93, 95, and 97 isotopes: 153,155,157Sm, 155,157,159Gd, 157,159,161Dy, 151Ce, 153,155Nd, 161,163Er, 163,165Yb.

doi: 10.1103/PhysRevC.105.014301
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2022HU09      Phys.Lett. B 833, 137345 (2022)

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

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

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

doi: 10.1016/j.physletb.2022.137345
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2022HU21      Phys.Rev. C 106, L061301 (2022)

T.Huang, D.Seweryniak, B.B.Back, P.C.Bender, M.P.Carpenter, P.Chowdhury, R.M.Clark, P.A.Copp, X.-T.He, R.D.Herzberg, D.E.M.Hoff, H.Jayatissa, T.L.Khoo, F.G.Kondev, G.Morgan, C.Morse, A.Korichi, T.Lauritsen, C.Muller-Gatermann, D.H.Potterveld, W.Reviol, A.M.Rogers, S.Saha, G.Savard, K.Sharma, S.Stolze, S.Waniganeththi, G.L.Wilson, J.Wu, Y.-F.Xu, S.Zhu

Discovery of the new isotope 251Lr: Impact of the hexacontetrapole deformation on single-proton orbital energies near the Z=100 deformed shell gap

NUCLEAR REACTIONS 203Tl(50Ti, 2n)251Lr, 205Tl(50Ti, 2n)253Lr, E=237 MeV; measured reaction products, α-decay of the reaction products, Eα, Iα. 251,253Lr; deduced levels J, π, α-decay width. 251,253,255Lr; calculated single-proton levels near the Fermi surface. Calculations with particle-number conserving cranked shell model. Beam delivered to target by ATLAS linear accelerator and recoiling reaction products were separated in the Argonne Gas-Filled Analyzer (AGFA) at (ANL). Decay of the implanted reaction products was measured in pixelized double-sided Si strip detector (DSSD).

RADIOACTIVITY 251,253Lr(α)[from 203,205Tl(50Ti, 2n), E=237 MeV]; measured Eα, Iα; deduced T1/2, Q-value, α-decay branchings and widths. Comparison to other experimental data. and predictions of theoretical models.

doi: 10.1103/PhysRevC.106.L061301
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2022IV01      Phys.Rev. C 105, 034337 (2022)

D.Ivanova, S.Lalkovski, C.Costache, S.Kisyov, C.Mihai, N.Marginean, P.Petkov, L.Atanasova, D.Bucurescu, R.B.Cakirli, M.P.Carpenter, R.F.Casten, Gh.Cata-Danil, I.Cata-Danil, D.Deleanu, D.Filipescu, N.Florea, I.Gheorghe, D.Ghita, T.Glodariu, F.G.Kondev, R.Lica, R.Marginean, A.Negret, S.Pascu, T.Sava, E.A.Stefanova, L.Stroe, G.Suliman, R.Suvaila, O.Yordanov, N.V.Zamfir

Structure of the low-lying states in 99, 101, 103, 105Pd

NUCLEAR REACTIONS 90,92,94Zr(12C, 3n), E=45 MeV; 96Zr(13C, 4n), E=55 MeV; measured Eγ, Iγ, γγ-coin. 94Zr(12C, 3n), E=56 MeV; measured Eγ, Iγ, γγ-coin with plunger device. 99,101,103,105Pd; deduced levels, J, π, B(M1), B(E2), T1/2 of excited states, multipolarity, δ, high-spin states, bands structure. Half-lives were determined by centroid shift method, deconvolution method and differential decay curve method (on case of 103Pd experiment with plunger). Comparison with rigid triaxial rotor plus particle model (RTRPM) calculations. RoSphere array comprised of 8 HPGe and 11 LaBr3:Ce detectors at IFIN-HH (Romania).

doi: 10.1103/PhysRevC.105.034337
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2022LI54      Phys.Rev. C 106, 044313 (2022)

D.Little, A.D.Ayangeakaa, R.V.F.Janssens, S.Zhu, Y.Tsunoda, T.Otsuka, B.A.Brown, M.P.Carpenter, A.Gade, D.Rhodes, C.R.Hoffman, F.G.Kondev, T.Lauritsen, D.Seweryniak, J.Wu, J.Henderson, C.Y.Wu, P.Chowdhury, P.C.Bender, A.M.Forney, W.B.Walters

Multistep Coulomb excitation of 64Ni: Shape coexistence and nature of low-spin excitations

NUCLEAR REACTIONS 208Pb(64Ni, 64Ni'), E=272 MeV; measured reaction products, time-of-flight difference between the projectile and target recoils as a function of scattering angle, Eγ, Iγ, (particle)γ-coin, Coulomb-excitation yields using GRETINA array with 12 modules of 48 highly-segmented coaxial HPGe crystals for γ detection, and CHICO2 array of 20 position-sensitive parallel-plate avalanche counters for the detection of scattered particles at the ATLAS-ANL facility. Multistep safe Coulomb-excitation. 64Ni; deduced levels, J, π, E2 matrix elements using GOSIA least-squares fitting code, B(E2), spectroscopic electric quadrupole moments, evidence for triple shape coexistence. Comparison with previous experimental results, and with Monte Carlo shell-model (MCSM), and conventional shell-model calculations.

NUCLEAR STRUCTURE 64Ni; calculated levels, J, π, B(E2), spectroscopic quadrupole moments, proton and neutron orbital occupancies for 2+ and 0+ states using Monte Carlo shell-model (MCSM), and conventional shell-model calculations with the jj44 and fp effective interactions. Comparison with experimental data.

doi: 10.1103/PhysRevC.106.044313
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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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2022MA65      Phys.Rev. C 106, 064326 (2022)

A.Mattera, E.A.McCutchan, S.Zhu, C.Morse, M.P.Carpenter, P.Copp, C.Muller-Gatermann, W.Reviol, J.P.Greene, M.Gott

Decay spectroscopy of the blocked fission product 130I

RADIOACTIVITY 130I(β-)[from 130Te(p, n), E=7.5 MeV]; measured Eγ, Iγ, γγ-coin, γγ(θ). 130Xe; deduced levels, J, π, δ, transition intensities, γγ-angular correlations. Uncertainty of the strongest transition improved by a factor 2. Comparison to other experimental data. Measurement with Gammasphere array consisted of 49 Compton-suppressed HPGe detectors (ANL). Source was produced by irradiation at the Brookhaven Tandem Van de Graaff facility. Estimated source strength was around 11 μCi.

doi: 10.1103/PhysRevC.106.064326
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2022MO05      Nucl.Instrum.Methods Phys.Res. A1025, 166155 (2022)

C.Morse, H.L.Crawford, A.O.Macchiavelli, A.Wiens, M.Albers, A.D.Ayangeakaa, P.C.Bender, C.M.Campbell, M.P.Carpenter, P.Chowdhury, R.M.Clark, M.Cromaz, H.M.David, P.Fallon, R.V.F.Janssens, T.Lauritsen, I.-Y.Lee, C.J.Lister, D.Miller, V.S.Prasher, S.L.Tabor, D.Weisshaar, S.Zhu

The polarization sensitivity of GRETINA

NUCLEAR REACTIONS 24Mg(p, p'), E=2.45 MeV; measured reaction products, Eγ, Iγ. 25Mg; deduced γ-ray energies, J, π, polar angular distribution.

doi: 10.1016/j.nima.2021.166155
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2022RU06      Phys.Rev. C 106, 034318 (2022)

J.Rufino, Jr., E.A.McCutchan, S.Zhu, A.A.Sonzogni, M.Alcorta, P.F.Bertone, M.P.Carpenter, J.Clark, C.R.Hoffman, R.V.F.Janssens, F.G.Kondev, T.Lauritsen, C.J.Lister, R.Pardo, A.Rogers, G.Savard, D.Seweryniak, R.Vondrasek

β decay of 141Ba

RADIOACTIVITY 141Ba(β-)[from β- decay of 141Cs beam produced as fission fragment in 252Cf(SF) at the CARIBU-ANL facility]; measured Eγ, Iγ, γγ-coin, γγ(θ) using the GAMMASPHERE array with 99 Compton-suppressed HPGe detectors. 141La; deduced levels, J, π, multipolarities, multipole mixing ratios, β feedings, logft. Comparison with previous experimental results, including total absorption gamma-spectra (TAGS) data, and with evaluated data in the ENSDF database. Relevance to decay heat in reactors, and reactor antineutrino spectrum. Decay-scheme figure is given in the Supplemental material of the paper.

doi: 10.1103/PhysRevC.106.034318
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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 T1/2, 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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2022SE03      Phys.Rev. C 105, 044315 (2022)

N.Sensharma, A.D.Ayangeakaa, R.V.F.Janssens, Q.B.Chen, S.Zhu, M.Alcorta, M.P.Carpenter, E.A.McCutchan, F.G.Kondev, T.Lauritsen, D.Seweryniak, C.R.Hoffman, A.M.Rogers, A.Gade, T.Baugher, P.Chowdhury

Single-particle and dipole excitations in 62Co

NUCLEAR REACTIONS 26Mg(48Ca, 3np2α), E=275, 290, 320 MeV; measured Eγ, Iγ, γ(θ), γγ-coin. 62Co; deduced levels, J, π, angular correlation ratios, experimental angular distribution coefficients, multipolarities, rotational bands structures. Comparison to shell-model calculations using the GXPF1A two-body effective interaction. Systematics for magnetic rotational bands in 60Co, 61Co, 62Co, 58Fe. Gammasphere array with 101 detectors in conjunction with the fragment mass analyzer (FMA) and a microchannel plate (MCP) detector at ATLAS accelerator (ANL).

doi: 10.1103/PhysRevC.105.044315
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2022SU19      Phys.Rev. C 106, 024316 (2022)

S.Suman, S.K.Tandel, S.G.Wahid, T.Manu, M.Hemalatha, B.Maheshwari, A.K.Jain, P.Chowdhury, R.V.F.Janssens, F.G.Kondev, M.P.Carpenter, T.Lauritsen, D.Seweryniak

Successive neutron alignments in the yrast, negative-parity band of oblate-deformed 199Tl

NUCLEAR REACTIONS 197Au(209Bi, X)199Tl, E=1450 MeV; measured Eγ, Iγ, γγ-coin using Gammasphere array with 100 Compton-suppressed HPGe detectors at the ATLAS-ANL accelerator facility. 199Tl; deduced high-spin levels, J, π, alignments, signature slitting, B(M1)/B(E2), configurations, oblate deformation. 199Tl; calculated total energy surfaces in (ϵ cosγ, ϵ sinγ) plane, neutron- and proton-quasiparticle levels for oblate deformation as function of angular frequency with principal axis cranking (PAC) and tilted axis cranking (TAC) models using the ultimate cranker (UC) code.

doi: 10.1103/PhysRevC.106.024316
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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 T1/2, 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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2022WA20      Phys.Lett. B 832, 137262 (2022)

S.G.Wahid, S.K.Tandel, S.Suman, P.C.Srivastava, A.Kumar, P.Chowdhury, F.G.Kondev, R.V.F.Janssens, M.P.Carpenter, T.Lauritsen, D.Seweryniak, S.Zhu

Emergence of an island of extreme nuclear isomerism at high excitation near 208Pb

NUCLEAR REACTIONS 197Au(207Pb, X)204Pb/205Bi/206Bi, E=1430 MeV; 197Au(207Pb, X)204Pb/205Bi/206Bi, E=1450 MeV; measured Eγ, Iγ, γγ-coin, delayed γ spectra, T1/2 of isomers by γγ(t) using pulsed beam from ATLAS-ANL facility, and Gammasphere array for γ detection. 204Pb, 205,206Bi; deduced levels, isomers, J, π, configurations, nuclear isomerism from core-excited configurations in the vicinity of 208Pb. Comparison with shell-model predictions.

COMPILATION 93Nb, 93Mo, 140Nd, 144Pm, 148Tb, 212,213Fr, 204Pb, 205,206Bi; compiled T1/2 of isomers of >1 micro-sec half-life above 7-MeV excitations across the nuclear chart. 202,203,204,205Tl, 202,203,204Pb, 206Bi, 213At, 210,211,212Rn, 209,211,212Fr; compiled B(E3) for isomer decays.

doi: 10.1016/j.physletb.2022.137262
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2022ZH22      Phys.Lett. B 829, 137129 (2022)

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

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

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

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

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

Identification of excited states in 188Bi and 188Po

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

doi: 10.1103/PhysRevC.106.024317
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2021BA03      Phys.Rev. C 103, 014301 (2021)

A.Basu, A.K.Singh, I.Ragnarsson, B.G.Carlsson, A.Kardan, G.B.Hagemann, G.Sletten, B.Herskind, H.Hubel, S.Chmel, A.N.Wilson, J.Rogers, R.V.F.Janssens, M.P.Carpenter, T.L.Khoo, F.G.Kondev, T.Lauritsen, S.Zhu, A.Korichi, P.Fallon, B.M.Nyako, J.Timar

Highly deformed band structures due to core excitations in 123Xe

NUCLEAR REACTIONS 80Se(48Ca, 5n)123Xe, E=207 MeV; measured Eγ, Iγ, two to four-fold γγ-coin, angular-distribution ratios for eight transitions using the Gammasphere array at ATLAS-ANL facility. 123Xe; deduced high-spin levels, J, π, multipolarities, highly-deformed rotational bands, alignments, band crossings, configurations; calculated total energy surfaces. Comparison with cranked Nilsson-Strutinsky (CNS) and cranked Nilsson-Strutinsky-Bogoliubov (CNSB) models.

doi: 10.1103/PhysRevC.103.014301
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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, Γp, Γγ, 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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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, T1/2 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 T1/2, 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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2021CR01      Phys.Lett. B 816, 136210 (2021)

F.C.L.Crespi, A.Bracco, E.G.Lanza, A.Tamii, N.Blasi, F.Camera, O.Wieland, N.Aoi, D.L.Balabanski, S.Bassauer, A.S.Brown, M.P.Carpenter, J.J.Carroll, M.Ciemala, A.Czeszumska, P.J.Davies, V.Derya, L.M.Donaldson, Y.D.Fang, H.Fujita, G.Gey, H.T.Ha, M.N.Harakeh, T.Hashimoto, N.Ichige, E.Ideguchi, A.Inoue, J.Isaak, C.Iwamoto, D.G.Jenkins, T.Klaus, N.Kobayashi, T.Koike, M.Krzysiek, M.K.Raju, M.Liu, A.Maj, L.Morris, P.von Neumann-Cosel, S.Noji, H.J.Ong, S.G.Pickstone, N.Pietralla, D.Savran, J.M.Schmitt, M.Spieker, G.Steinhilber, C.Sullivan, B.Wasilewska, M.Weinert, V.Werner, Y.Yamamoto, T.Yamamoto, R.G.T.Zegers, X.Zhou, S.Zhu, A.Zilges

The structure of low-lying 1- states in 90, 94Zr from (α, α'γ) and (p, p'γ) reactions

NUCLEAR REACTIONS 90,94Zr(p, p'γ), E=80 MeV; 90,94Zr(α, α'γ), E=130 MeV; measured reaction products, Eγ, Iγ; deduced ratio of the measured yields, dipole states σ, transition densities, low-lying dipole strength. The array CAGRA with HPGe detectors.

doi: 10.1016/j.physletb.2021.136210
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2021DO08      Phys.Rev.Lett. 127, 202501 (2021)

D.T.Doherty, A.N.Andreyev, D.Seweryniak, P.J.Woods, M.P.Carpenter, K.Auranen, A.D.Ayangeakaa, B.B.Back, S.Bottoni, L.Canete, J.G.Cubiss, J.Harker, T.Haylett, T.Huang, R.V.F.Janssens, D.G.Jenkins, F.G.Kondev, T.Lauritsen, C.Lederer-Woods, J.Li, C.Muller-Gatermann, D.Potterveld, W.Reviol, G.Savard, S.Stolze, S.Zhu

Solving the Puzzles of the Decay of the Heaviest Known Proton-Emitting Nucleus 185Bi

RADIOACTIVITY 185Bi(p), (α), (IT) [from 95Mo(93Nb, 3n), E=424 MeV]; measured decay products, Eγ, Iγ, Eα, Iα, Ep, Ip, α-γ- and π-γ-coin.; deduced γ-ray energies, decay levels schemes, T1/2, high-spin states, reassignment of the ground-state lifetime, proton-decay spectroscopic factor. Fragment Mass Analyzer and Argonne Gas-Filled Analyzer at Argonne National Laboratory's ATLAS facility.

doi: 10.1103/PhysRevLett.127.202501
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2021HA14      Phys.Rev. C 103, 034322 (2021)

D.J.Hartley, K.Villafana, F.G.Kondev, M.A.Riley, R.V.F.Janssens, K.Auranen, A.D.Ayangeakaa, J.S.Baron, A.J.Boston, M.P.Carpenter, J.A.Clark, J.P.Greene, J.Heery, C.R.Hoffman, P.Jackson, T.Lauritsen, J.Li, D.Little, E.S.Paul, G.Savard, D.Seweryniak, J.Simpson, S.Stolze, G.L.Wilson, J.Wu, S.Zhu, S.Frauendorf

Possible quenching of static neutron pairing near the N=98 deformed shell gap: Rotational structures in 160, 161Gd

NUCLEAR REACTIONS 154Sm, 164Dy(160Gd, X)160Gd/161Gd, E=1000 MeV; measured Eγ, Iγ, γγ-coin using the Gammasphere array with 73 detectors at ATLAS-ANL facility. 160,161Gd; deduced high-spin levels, J, π, rotational bands, branching ratios, B(M1)/B(E2), Nilsson configurations, alignments, neutron pairing strength. Comparison with structure of ν5/2[523] band in N=97 isotone 159Sm.

doi: 10.1103/PhysRevC.103.034322
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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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2021KE04      Phys.Rev. C 103, 035805 (2021)

A.R.L.Kennington, G.Lotay, D.T.Doherty, D.Seweryniak, C.Andreoiu, K.Auranen, M.P.Carpenter, W.N.Catford, C.M.Deibel, K.Hadynska-Klek, S.Hallam, D.Hoff, T.Huang, R.V.F.Janssens, S.Jazrawi, J.Jose, F.G.Kondev, T.Lauritsen, J.Li, A.M.Rogers, J.Saiz, G.Savard, S.Stolze, G.L.Wilson, S.Zhu

Level structure of the Tz = -1 nucleus 34Ar and its relevance for nucleosynthesis in ONe novae

NUCLEAR REACTIONS 12C(24Mg, 2n)34Ar, (24Mg, 2p)34S, E=95 MeV; measured reaction products, Eγ, Iγ, (34Ar)γ- and (34S)γ-coin, γγ-coin, γ(θ) using GRETINA array for detection of high-energy γ rays, and Fragment mass analyzer (FMA) for recoils at ATLAS-ANL facility. 34Ar, 34S; deduced levels, proton-unbound levels of astrophysical significance, J, π, mirror symmetry, 33S/32S and 34S/32S ratios to search for nova presolar grains, and compared with previous experimental data. 34Cl(p, γ), T=0.1-0.8 GK; calculated stellar reaction rate. Comparison of levels structures in 34Ar and 34S with data from the ENSDF database, and with shell-model calculations using USDA Hamiltonian, within the sd shell-model space for even-parity states, and using WBP Hamiltonian, within the sd-pf space for odd-parity levels.

doi: 10.1103/PhysRevC.103.035805
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2021MI07      Phys.Rev. C 103, 024323 (2021)

A.J.Mitchell, R.Orford, G.J.Lane, C.J.Lister, P.Copp, J.A.Clark, G.Savard, J.M.Allmond, A.D.Ayangeakaa, S.Bottoni, M.P.Carpenter, P.Chowdhury, D.A.Gorelov, R.V.F.Janssens, F.G.Kondev, U.Patel, D.Seweryniak, M.L.Smith, Y.Y.Zhong, S.Zhu

Ground-state and decay properties of neutron-rich 106Nb

RADIOACTIVITY 106Nb(β-)[from 252Cf(SF), CARIBU radioactive-ion-beam facility at ANL, followed by mass separation and measurement using Multi-Reflection Time-of-Flight (MR-TOF) mass separator and Canadian Penning Trap (CPT)]; measured CPT spectra, Eγ, Iγ, βγγ-coin, half-life of 106Nb decay using five HPGe clover detectors, and a plastic scintillator at the X-Array and SATURN decay-spectroscopy station. 106Mo; deduced levels, J, π, apparent β feedings, range of logft values, configurations. 106Nb; discussed spin, parity and configurations of the ground state. Comparison with earlier experimental results.

ATOMIC MASSES 106Nb; measured cyclotron frequency using the Phase-Imaging Ion-Cyclotron-Resonance (PI-ICR) technique, CPT spectra; deduced mass excess. Comparison with previous measurement, and with AME 2016 evaluation.

doi: 10.1103/PhysRevC.103.024323
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2021MO25      Phys.Rev. C 104, 054323 (2021)

L.Morris, D.G.Jenkins, M.N.Harakeh, J.Isaak, N.Kobayashi, A.Tamii, S.Adachi, P.Adsley, N.Aoi, A.Bracco, A.Brown, M.P.Carpenter, J.J.Carroll, S.Courtin, F.C.L.Crespi, P.J.Davies, G.Fruet, Y.D.Fang, H.Fujita, G.Gey, T.H.Hoang, N.Ichige, E.Ideguchi, A.Inoue, C.Iwamoto, T.Koike, M.Kumar Raju, M.L.Liu, D.Montanari, P.von Neumann-Cosel, S.Noji, H.J.Ong, D.Savran, J.M.Schmitt, C.Sullivan, B.Wasilewska, M.Weinert, V.Werner, Y.Yamamoto, R.G.T.Zegers, X.H.Zhou, S.Zhu

Search for in-band transitions in the candidate superdeformed band in 28Si

NUCLEAR REACTIONS 28Si(α, α'), E=130 MeV beam from K140 AVF cyclotron at the RCNP-Osaka; measured Eα, Iα using the Grand Raiden spectrometer, Eγ, Iγ, γγ-coin using CAGRA array of 12 HPGe clover detectors and four LaBr3 detectors. 28Si; deduced levels, J, π, bands; analyzed 4+ member in search of a superdeformed (SD) band, branching ratios of γ rays from the 4+ member, and B(E2); based on comparison of experimental B(E2) values with predicted B(E2) values from antisymmetrized molecular dynamics (AMD) calculations for a set of identified states in 28Si, strongly rejected hypothesized superdeformed band in this nuclide.

doi: 10.1103/PhysRevC.104.054323
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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 178,180,182,184,186,188W, 178,180Hf, 188Os.

doi: 10.1103/PhysRevC.104.044318
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2021RU07      Phys.Rev. C 103, 034306 (2021)

D.Rudolph, I.Ragnarsson, R.M.Clark, C.Andreoiu, M.P.Carpenter, J.Ekman, C.Fahlander, F.G.Kondev, T.Lauritsen, D.G.Sarantites, D.Seweryniak, C.E.Svensson

Low-, medium-, and high-spin states in the N=Z + 1 nucleus 63Ga

NUCLEAR REACTIONS 40Ca(28Si, pα)63Ga, E=122 MeV; measured Eγ, Iγ, γγ-, and (particle)γ-coin, γγ(θ)(DCO) using Gammasphere and Microball arrays at ATLAS-ANL facility. 63Ga; deduced high-spin levels, J, π, multipolarities, rotational bands, configurations, alignments. Comparison with shell-model calculations for low-spin levels, and cranked Nilsson-Strutinsky calculations for high-spin bands.

NUCLEAR STRUCTURE 63Ga; calculated levels, J, π, rotational bands, level half-lives, magnetic dipole and electric quadrupole moments, γ-branching ratios, γ-mixing ratios, configurations. Shell-model calculations, with JUN45, FPD6, KB3G and GXPF1A interactions using ANTOINE code. Comparison with experimental data.

doi: 10.1103/PhysRevC.103.034306
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2021RU09      Phys.Rev. C 104, 044314 (2021)

D.Rudolph, C.Andreoiu, M.A.Bentley, M.P.Carpenter, R.J.Charity, R.M.Clark, J.Ekman, C.Fahlander, P.Fallon, W.Reviol, D.G.Sarantites, D.Seweryniak

Experimental and shell-model study of excited states in 5526Fe29 and related notes on 5529Cu26

NUCLEAR REACTIONS 28Si(32S, n4p)55Fe, E=125 MeV; measured Eγ, Iγ, (particle)γ-, γγ-coin, γγ(θ)(DCO) using the Gammasphere array for γ detection, 4π Microball system for charged particle detection, and the Neutron Shell array for neutron detection at ANL-ATLAS and LBNL cyclotron facilities. 55Fe; deduced high-spin levels, J, π, multipolarities, dipole structure, configurations. Comparison with shell-model calculations.

NUCLEAR STRUCTURE 55Fe, 55Cu; calculated high-spin levels, J, π, level half-lives, B(E2), B(M1), γ-branching ratios, configurations, occupation numbers relative to 56Ni. Shell-model calculations with KB3G and GXPF1A interactions, with isospin breaking terms, using ANTOINE code. Comparison with experimental data.

doi: 10.1103/PhysRevC.104.044314
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2021SU02      Phys.Rev. C 103, 014319 (2021)

S.Suman, S.K.Tandel, A.Kumawat, S.G.Wahid, M.Hemalatha, P.Chowdhury, R.V.F.Janssens, M.P.Carpenter, T.L.Khoo, F.G.Kondev, T.Lauritsen, C.J.Lister, D.Seweryniak, S.Zhu

Nanosecond isomers and the evolution of collectivity in stable, even-A Hg isotopes

NUCLEAR REACTIONS 197Au(209Bi, X), E=1450 MeV; 197Au(207Pb, X), E=1430 MeV; measured Eγ, Iγ, three- and higher fold γγ-coin, γγ(θ)(DCO), half-lives of nanosecond isomers by γγ(t) using pulsed beams from ATLAS-ANL accelerator, and Gammasphere array of 100 Compton-suppressed HPGe detectors. 198,200,202Hg; deduced levels, J, π, multipolarities, B(E2), configurations, band crossings, and collectivity; calculated total energy surface plots, neutron and proton quasiparticle energy levels using the Ultimate Cranker code. Systematics of nanosecond isomers, half-lives and B(E2) in 192,194,196,198,200,202,204Hg.

doi: 10.1103/PhysRevC.103.014319
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2021TO03      Appl.Radiat.Isot. 172, 109693 (2021)

A.D.Tollefson, C.M.Smith, M.H.Carpenter, M.P.Croce, M.E.Fassbender, K.E.Koehler, L.M.Lilley, E.M.O'Brien, D.R.Schmidt, B.W.Stein, J.N.Ullom, M.D.Yoho, D.J.Mercer

Measurement of 227Ac impurity in 225Ac using decay energy spectroscopy

RADIOACTIVITY 225,227Ac(β-), 227Ac(α); measured decay products, Eγ, Iγ; deduced the EOB activities ratio.

doi: 10.1016/j.apradiso.2021.109693
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2021ZA06      Phys.Rev. C 104, 014607 (2021)

J.C.Zamora, C.Sullivan, R.G.T.Zegers, N.Aoi, L.Batail, D.Bazin, M.Carpenter, J.J.Carroll, Y.D.Fang, H.Fujita, U.Garg, G.Gey, C.J.Guess, M.N.Harakeh, T.H.Hoang, E.Hudson, N.Ichige, E.Ideguchi, A.Inoue, J.Isaak, C.Iwamoto, C.Kacir, N.Kobayashi, T.Koike, M.Kumar Raju, S.Lipschutz, M.Liu, P.von Neumann-Cosel, S.Noji, H.J.Ong, S.Peru, J.Pereira, J.Schmitt, A.Tamii, R.Titus, V.Werner, Y.Yamamoto, X.Zhou, S.Zhu

Investigation of the isoscalar response of 24Mg to 6Li scattering

NUCLEAR REACTIONS 24Mg(6Li, 6Li'), E=100 MeV/nucleon; measured scattered 6Li particles, σ(θ) using Grand Raiden spectrometer and two position-sensitive multiwire drift chambers (MWDCs) and three plastic scintillators for particle identification and reconstructing their trajectories at RCNP-Osaka University; deduced differential σ(E, Q), angular momentum transfers by fitting with multipole-decomposition analysis (MDA) using DWBA calculations for angular-momentum transfers. 24Mg; deduced energies, widths, EWSR, isoscaler giant monopole resonance (ISGMR), isoscaler giant monopole resonance (ISGDR), isoscaler giant quadrupole resonance (ISGQR) strength functions from Lorentzian fits to data. Comparison with antisymmetrized molecular dynamics (AMD) calculations, and with previous experimental data.

doi: 10.1103/PhysRevC.104.014607
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2020BA12      Phys.Rev. C 101, 024309 (2020)

A.Basu, A.K.Singh, S.Nag, G.B.Hagemann, G.Sletten, B.Herskind, A.N.Wilson, J.Rogers, I.Ragnarsson, H.Hubel, S.Chmel, R.V.F.Janssens, M.P.Carpenter, T.L.Khoo, F.G.Kondev, T.Lauritsen, S.Zhu, A.Korichi, P.Fallon, B.M.Nyako, J.Timar

Evolution of collective and noncollective structures in 123Xe

NUCLEAR REACTIONS 80Se(48Ca, 5n)123Xe, E=207 MeV; measured Eγ, Iγ, γγ-coin, γ-ray angular distribution ratios using Gammasphere array at ATLAS-ANL facility. 123Xe; deduced high-spin levels, J, π, multipolarities, rotational bands, configurations, alignments, B(E1), B(E1)/B(E2); calculated total-energy surfaces in (ϵ2, γ) plane. Comparison with cranked Nilsson-Strutinsky (CNS) calculations.

doi: 10.1103/PhysRevC.101.024309
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2020DE09      Phys.Rev. C 101, 034612 (2020)

V.V.Desai, A.Pica, W.Loveland, J.S.Barrett, E.A.McCutchan, S.Zhu, A.D.Ayangeakaa, M.P.Carpenter, J.P.Greene, T.Lauritsen, R.V.F.Janssens, B.M.S.Amro, W.B.Walters

Multinucleon transfer in the interaction of 977 MeV and 1143 MeV 204Hg with 208Pb

NUCLEAR REACTIONS 208Pb(204Hg, X)72Ga/81mRb/85Kr/91Sr/92Sr/97Zr/90Nb/99Mo/93Tc/99Tc/97Ru/103Ru/112Ag/115Cd/117Sb/131I/125Xe/135Xe/140Ba/143Ce/156Sm/154Tb/167Ho/169Lu/180mHf/181Re/182Re/188Re/191Os/188Ir/190Ir/195Pt/192Au/193Au/194Au/196Au/198Au/199Au/200mAu/195mHg/197Hg/203Hg/198Tl/199Tl/200Tl/201Tl/202Tl/200Pb/201Pb/202mPb/203Pb/204Pb/202Bi/203Bi/204Bi/205Bi/206Bi/206Po/208At/209At/210At/211Rn, E=977 MeV; 208Pb(204Hg, X)69Zn/72Zn/82Br/86Y/87Y/91Sr/96Nb/95Tc/96Tc/97Zr/97Ru/99Mo/101Rh/103Ru/105Ru/111In/115Cd/117Sb/120mSb/122Sb/128Sb/132Cs/135mBa/140Ba/143Ce/147Gd/172Er/165Tm/169Lu/171Lu/170Hf/173Hf/180mHf/176Ta/177Ta/178Ta/183Ta/181Re/182Re/188Re/189Re/183Os/185Os/186Ir/188Ir/190Ir/188Pt/191Pt/197mPt/193Au/194Au/196Au/198Au/199Au/200mAu/193mHg/195mHg/197Hg/203Hg/197Tl/199Tl/200Tl/201Tl/202Tl/200Pb/201Pb/202mPb/203Pb/203Bi/204Bi/205Bi/206Bi/206Po/207Po/209At/210At/211Rn, E=1143 MeV; measured Eγ, Iγ, fragment cumulative and independent σ for nuclei produced in multi-nucleon transfer (MNT) reactions using Gammasphere array for off-line γ counting at ANT-ATLAS facility. Comparison with theoretical predictions of GRAZING-F, dinuclear systems (DNS), and improved quantum molecular dynamics (ImQMD) models, and with previous experimental results from MNT reactions: 248Cm(16O, X), (86Kr, X), (129Xe, X), (132Xe, X), (136Xe, X), 197Au(238U, X), 238U(18O, X), (238U, X), 208Pb(18O, X), (64Ni, X), (136Xe, X), 198Pt(136Xe, X). No evidence for production of nuclei near the N=126 shell.

doi: 10.1103/PhysRevC.101.034612
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2020GU18      Phys.Rev. C 102, 034316 (2020)

A.C.Gula, E.A.McCutchan, C.J.Lister, J.P.Greene, S.Zhu, P.A.Ellison, R.J.Nickles, M.P.Carpenter, S.V.Smith, A.A.Sonzogni

State-of-the-art γ-ray assay of 86Y for medical imaging

RADIOACTIVITY 86Y(β+), (EC)[from 86Sr(p, n), E=16 MeV at the University of Wisconsin Medical Physics cyclotron, followed by chemical separation of activity]; measured Eγ, Iγ, γγ-coin, γγ(θ) using the Gammasphere array at ANL. 86Sr; deduced levels, J, π, multipolarities, mixing ratios, I(β++ϵ), logft values, maximum and average positron energies; estimated radiation dose for potential imaging partner to the therapeutic 90Y isotope. Comparison with previous experimental results.

doi: 10.1103/PhysRevC.102.034316
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2020HA03      Phys.Rev. C 101, 015804 (2020)

M.R.Hall, D.W.Bardayan, T.Baugher, A.Lepailleur, S.D.Pain, A.Ratkiewicz, S.Ahn, J.M.Allen, J.T.Anderson, A.D.Ayangeakaa, J.C.Blackmon, S.Burcher, M.P.Carpenter, S.M.Cha, K.Y.Chae, K.A.Chipps, J.A.Cizewski, M.Febbraro, O.Hall, J.Hu, C.L.Jiang, K.L.Jones, E.J.Lee, P.D.O'Malley, S.Ota, B.C.Rasco, D.Santiago-Gonzalez, D.Seweryniak, H.Sims, K.Smith, W.P.Tan, P.Thompson, C.Thornsberry, R.L.Varner, D.Walter, G.L.Wilson, S.Zhu

γ-ray spectroscopy of astrophysically important states in 39Ca

NUCLEAR REACTIONS 40Ca(3He, αγ)39Ca, E=30 MeV; Measured Eγ, Iγ, Eα, Iα, αγ-coin, reaction products using the GODDESS array (Gammasphere for γ detection and ORRUBA for particle detection) at the ATLAS-ANL facility. 39Ca; deduced levels, J, π, γ-branching ratios. 38K(p, γ)39Ca, T=0.1-0.4 GK; deduced resonance parameters, astrophysical reaction rates. Discussed impact on abundances of isotopes created at the endpoint of nova nucleosynthesis.

doi: 10.1103/PhysRevC.101.015804
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2020HA13      Phys.Rev. C 101, 044301 (2020)

D.J.Hartley, F.G.Kondev, G.Savard, J.A.Clark, A.D.Ayangeakaa, S.Bottoni, M.P.Carpenter, P.Copp, K.Hicks, C.R.Hoffman, R.V.F.Janssens, T.Lauritsen, R.Orford, J.Sethi, S.Zhu

High-K, two-quasiparticle states in 160Gd

RADIOACTIVITY 160,160mEu(β-)[from 252Cf(SF), isobarically separated A=160 nuclei using the CARIBU source at Argonne National Laboratory]; measured β-, Eγ, Iγ, βγ- and βγγ-coin using four Ge clover detectors and four plastic scintillators. 160Gd; deduced levels, J, π, Kπ, bands, Nilsson configurations, total conversion coefficients and multipolarities of the 98.8- and 102.7-keV transitions, Iβ and logft. Comparison with previous experimental results, and with multiquasiparticle calculations using Woods-Saxon potential, and Lipkin-Nogami prescription for pairing.

doi: 10.1103/PhysRevC.101.044301
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2020HA31      Phys.Rev. C 102, 045802 (2020)

M.R.Hall, D.W.Bardayan, T.Baugher, A.Lepailleur, S.D.Pain, A.Ratkiewicz, S.Ahn, J.M.Allen, J.T.Anderson, A.D.Ayangeakaa, J.C.Blackmon, S.Burcher, M.P.Carpenter, S.M.Cha, K.Y.Chae, K.A.Chipps, J.A.Cizewski, M.Febbraro, O.Hall, J.Hu, C.L.Jiang, K.L.Jones, E.J.Lee, P.D.O'Malley, S.Ota, B.C.Rasco, D.Santiago-Gonzalez, D.Seweryniak, H.Sims, K.Smith, W.P.Tan, P.Thompson, C.Thornsberry, R.L.Varner, D.Walter, G.L.Wilson, S.Zhu

19Ne level structure for explosive nucleosynthesis

NUCLEAR REACTIONS 19F(3He, t)19Ne, E=30 MeV; measured reaction products, E(t), I(t), Eγ, Iγ, (triton)γ-, and (triton)γγ-coin using ORRUBA array with Micron QQQ5 telescopes for tritons and Gammasphere array for γ rays at ATLAS-ANL facility. 19Ne; deduced levels, J, π, γ-branching ratios. Comparison with earlier experimental results and with evaluated data. 18F(p, α)15O, E(cm)<0.9 MeV; calculated astrophysical S factors, and reaction rates at temperature of 0.06 to 0.4 GK.

doi: 10.1103/PhysRevC.102.045802
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2020KE03      Phys.Rev.Lett. 124, 252702 (2020)

A.R.L.Kennington, G.Lotay, D.T.Doherty, D.Seweryniak, C.Andreoiu, K.Auranen, M.P.Carpenter, W.N.Catford, C.M.Deibel, K.Hadynska-Klek, S.Hallam, D.E.M.Hoff, T.Huang, R.V.F.Janssens, S.Jazrawi, J.Jose, F.G.Kondev, T.Lauritsen, J.Li, A.M.Rogers, J.Saiz, G.Savard, S.Stolze, G.L.Wilson, S.Zhu

Search for Nova Presolar Grains: γ-Ray Spectroscopy of 34Ar and its Relevance for the Astrophysical 33Cl(p, γ) Reaction

NUCLEAR REACTIONS 12C(24Mg, X)34Ar, E=95 MeV; measured reaction products, Eγ, Iγ. 34Cl, 34S; deduced γ-ray energies, intensities, J, π, contribution of individual resonances to the stellar reaction rate.

doi: 10.1103/PhysRevLett.124.252702
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2020LO11      Phys.Rev. C 102, 035804 (2020)

G.Lotay, D.T.Doherty, D.Seweryniak, M.P.Carpenter, R.V.F.Janssens, J.Jose, A.M.Rogers, P.J.Woods, S.Zhu

Spectroscopy of 30P and the abundance of 29Si in presolar grains

NUCLEAR REACTIONS 28Si(3He, p), E=13 MeV; measured Eγ, Iγ, γγ-coin, γ(θ), γγ(θ)(DCO) using the Gammasphere array of 97 Compton-suppressed HPGe detectors at ATLAS-ANL facility. 30P; deduced levels, resonances, J, π, and compared with evaluated data in the ENSDF database. 29Si(p, γ)30P, E(proton resonance)=2-500 keV; deduced spectroscopic factors, Γp, Γγ, resonance strengths, astrophysical reaction rates from 0.08 to 0.5 GK. Evaluated mean composition of nova ejecta of 28,29,30Si, 31P, 32,33,34S from models of nova explosions and compared with data in STARLIB database.

doi: 10.1103/PhysRevC.102.035804
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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 154,155,156,157,158Dy and 152,153,154,155,156Gd.

doi: 10.1103/PhysRevC.101.044312
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2020MA37      Phys.Rev.Lett. 125, 102502 (2020)

N.Marginean, D.Little, Y.Tsunoda, S.Leoni, R.V.F.Janssens, B.Fornal, T.Otsuka, C.Michelagnoli, L.Stan, F.C.L.Crespi, C.Costache, R.Lica, M.Sferrazza, A.Turturica, A.D.Ayangeakaa, K.Auranen, M.Barani, P.C.Bender, S.Bottoni, M.Boromiza, A.Bracco, S.Calinescu, C.M.Campbell, M.P.Carpenter, P.Chowdhury, M.Ciemala, N.Cieplicka-Orynczak, D.Cline, C.Clisu, H.L.Crawford, I.E.Dinescu, J.Dudouet, D.Filipescu, N.Florea, A.M.Forney, S.Fracassetti, A.Gade, I.Gheorghe, A.B.Hayes, I.Harca, J.Henderson, A.Ionescu, L.W.Iskra, M.Jentschel, F.Kandzia, Y.H.Kim, F.G.Kondev, G.Korschinek, U.Koster, Krishichayan, M.Krzysiek, T.Lauritsen, J.Li, R.Marginean, E.A.Maugeri, C.Mihai, R.E.Mihai, A.Mitu, P.Mutti, A.Negret, C.R.Nita, A.Olacel, A.Oprea, S.Pascu, C.Petrone, C.Porzio, D.Rhodes, D.Seweryniak, D.Schumann, C.Sotty, S.M.Stolze, R.Suvaila, S.Toma, S.Ujeniuc, W.B.Walters, C.Y.Wu, J.Wu, S.Zhu, S.Ziliani

Shape Coexistence at Zero Spin in 64Ni Driven by the Monopole Tensor Interaction

NUCLEAR REACTIONS 62Ni(18O, 16O), E=39 MeV; 65Cu(11B, 12C), E=26 MeV; 63Ni(n, γ), E thermal; measured reaction products, Eγ, Iγ; analyzed available data from multiple experiments. 64Ni; deduced γ-ray energies, J, π, B(E2). Comparison with theoretical calculations.

doi: 10.1103/PhysRevLett.125.102502
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2020MO36      Phys.Rev. C 102, 054328 (2020)

C.Morse, A.O.Macchiavelli, H.L.Crawford, S.Zhu, C.Y.Wu, Y.Y.Wang, J.Meng, B.B.Back, B.Bucher, C.M.Campbell, M.P.Carpenter, J.Chen, R.M.Clark, M.Cromaz, P.Fallon, J.Henderson, R.V.F.Janssens, M.D.Jones, T.L.Khoo, F.G.Kondev, T.Lauritsen, I.Y.Lee, J.Li, D.Potterveld, C.Santamaria, G.Savard, D.Seweryniak, S.Stolze, D.Weisshaar

Quadrupole and octupole collectivity in 143Ba

NUCLEAR REACTIONS 208Pb(143Ba, 143Ba'), E=627.8 MeV, [143Ba beam from 252Cf SF at the CARIBU facility at ATLAS-ANL]; measured reaction products, Eγ, Iγ, scattered particles, (particle)γ-coin, and half-life of the first 9/2- level from (particle)γ-coin using GRETINA array of 11 Quad detector modules, each with four 36-fold segmented HPGe crystals for γ detection and CHICO2 array of 20 Parallel Plate Avalanche Counters (PPACs). 143Ba; deduced levels, J, π, Coulomb excitation γ-ray yields, E2 matrix elements using GOSIA least-squares analysis, B(E2), upper limit for E3 matrix element and B(E3), alignment plots, doubly decoupled structure. Comparison with Reflection-Asymmetric Triaxial Particle Rotor Model (RAT-PRM) calculations.

doi: 10.1103/PhysRevC.102.054328
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2020RU03      Phys.Rev. C 102, 014313 (2020)

D.Rudolph, I.Ragnarsson, S.AAberg, C.Andreoiu, M.P.Carpenter, R.M.Clark, J.Ekman, C.Fahlander, R.V.F.Janssens, F.G.Kondev, T.Lauritsen, D.G.Sarantites, D.Seweryniak, C.E.Svensson

Onset of high-spin rotational bands in the N=Z nucleus 62Ga

NUCLEAR REACTIONS 40Ca(28Si, npα), E=122 MeV; measured Eγ, Iγ, (particle)γ- and γγ-coin, γγ(θ)(DCO) using the Gammasphere array and the 4π Microball system for charged particle detection at the ANL-ATLAS facility. 62Ga; deduced high-spin levels, J, π, multipolarities, band structures, alignments, and configurations; calculated energy surface contours in (ϵ2, γ) plane. Comparison with cranked Nilsson-Strutinsky (CNS) calculations.

doi: 10.1103/PhysRevC.102.014313
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2020RU04      Phys.Rev. C 102, 014316 (2020)

D.Rudolph, I.Ragnarsson, C.Andreoiu, M.A.Bentley, M.P.Carpenter, R.J.Charity, R.M.Clark, J.Ekman, C.Fahlander, P.Fallon, W.Reviol, D.G.Sarantites, D.Seweryniak

Single-particle and collective excitations in the N=28 isotones 54Fe and 53Mn

NUCLEAR REACTIONS 28Si(32S, 3pα)53Mn, (32S, 2pα)54Fe, E=125 MeV; measured Eγ, Iγ, E(n), (particle)γ- and γγ-coin, γγ(θ)(DCO) using the Gammasphere array for γ detection, 4π Microball system for charged particle detection, and the Neutron Shell for neutron detection at ANL-ATLAS and LBNL facilities. 53Mn, 54Fe; deduced high-spin levels, J, π, multipolarities, band structures, alignments and configurations. Comparison with cranked Nilsson-Strutinsky calculations, and with large-scale shell model calculations in the fp shell with GXPF1A and KB3G interactions and isospin breaking terms.

doi: 10.1103/PhysRevC.102.014316
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2020SE02      Phys.Rev.Lett. 124, 052501 (2020)

N.Sensharma, U.Garg, Q.B.Chen, S.Frauendorf, D.P.Burdette, J.L.Cozzi, K.B.Howard, S.Zhu, M.P.Carpenter, P.Copp, F.G.Kondev, T.Lauritsen, J.Li, D.Seweryniak, J.Wu, A.D.Ayangeakaa, D.J.Hartley, R.V.F.Janssens, A.M.Forney, W.B.Walters, S.S.Ghugre, R.Palit

Longitudinal Wobbling Motion in 187Au

NUCLEAR REACTIONS 174Yb(19F, X)187Au, E=105, 115 MeV; measured reaction products, Eγ, Iγ; deduced γ-ray energies and intensities, J, π, yrast band, B(M1)/B(E2). Comparison with PRM calculations.

doi: 10.1103/PhysRevLett.124.052501
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2020WA24      Phys.Rev. C 102, 024329 (2020)

S.G.Wahid, S.K.Tandel, S.Suman, M.Hemalatha, A.Patel, P.Roy, A.Y.Deo, Pragati, P.C.Srivastava, B.Bhoy, S.S.Bhattacharjee, R.P.Singh, S.Muralithar, P.Chowdhury, R.V.F.Janssens, M.P.Carpenter, T.L.Khoo, F.G.Kondev, T.Lauritsen, C.J.Lister, D.Seweryniak, S.Zhu, S.Rai, A.Sharma

Metastable states from multinucleon excitations in 202Tl and 203Pb

NUCLEAR REACTIONS 198Pt(7Li, 3n)202Tl, E=31-36 MeV; 197Au(209Bi, X), E=1450 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ)(DCO), γγ(linear polarization), half-lives of isomers by γ(t) and centroid-shift method using the INGA array at IUAC-New Delhi for the 202Tl experiment, and Gammasphere array at the ATLAS-ANL facility for 203Pb. 202Tl, 203Pb; deduced high-spin levels, isomers, J, π, multipolarities, B(E2), B(E3), configurations. Systematics of energies and B(Eλ) for isomers in 202,203,204Tl and 203,204,205Pb. Comparison with shell-model calculations.

doi: 10.1103/PhysRevC.102.024329
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2020YO01      Nucl.Instrum.Methods Phys.Res. A977, 164307 (2020)

M.D.Yoho, K.E.Koehler, D.T.Becker, D.A.Bennett, M.H.Carpenter, M.P.Croce, J.D.Gard, J.A.B.Mates, D.J.Mercer, N.J.Ortiz, D.R.Schmidt, C.M.Smith, D.S.Swetz, A.D.Tollefson, J.N.Ullom, L.R.Vale, A.L.Wessels, D.T.Vo

Improved plutonium and americium photon branching ratios from microcalorimeter gamma spectroscopy

RADIOACTIVITY 238,239,240Pu(α), 241Pu(β-), 241Am(α); measured decay products, Eγ, Iγ, X-rays; deduced γ-ray energies, branching ratios. Comparison with available data.

doi: 10.1016/j.nima.2020.164307
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2020ZA05      Phys.Rev. C 101, 064609 (2020)

J.C.Zamora, C.Sullivan, R.G.T.Zegers, N.Aoi, L.Batail, D.Bazin, M.Carpenter, J.J.Carroll, I.Deloncle, Y.D.Fang, H.Fujita, U.Garg, G.Gey, C.J.Guess, M.N.Harakeh, T.H.Hoang, E.Hudson, N.Ichige, E.Ideguchi, A.Inoue, J.Isaak, C.Iwamoto, C.Kacir, N.Kobayashi, T.Koike, M.Kumar Raju, S.Lipschutz, M.Liu, P.von Neumann-Cosel, S.Noji, H.J.Ong, S.Peru, J.Pereira, J.Schmitt, A.Tamii, R.Titus, V.Werner, Y.Yamamoto, X.Zhou, S.Zhu

Reexamination of isoscalar giant resonances in 12C and 93Nb through 6Li scattering

NUCLEAR REACTIONS 12C, 93Nb(6Li, 6Li'), E=100 MeV/nucleon; measured 6Li spectra, double-differential σ, and angular distributions for the isoscalar giant monopole resonances (ISGMRs) using the high-resolution Grand Raiden magnetic spectrometer at the RCNP-Osaka facility; deduced contribution of different angular momentum transfers to differential σ, energies, widths and E0 strength distribution of GMRs, EWSR, influence on GMRs due to nuclear structure. Angular distribution data fitted using multipole-decomposition analysis (MDA) and DWBA methods. Comparison with antisymmetrized molecular dynamics (AMD) calculations, and with previous experimental data.

doi: 10.1103/PhysRevC.101.064609
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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, T1/2, mass excesses, branching ratio. Comparison with theoretical calculations.

doi: 10.1016/j.physletb.2019.03.039
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2019AY04      Phys.Rev.Lett. 123, 102501 (2019)

A.D.Ayangeakaa, R.V.F.Janssens, S.Zhu, D.Little, J.Henderson, C.Y.Wu, D.J.Hartley, M.Albers, K.Auranen, B.Bucher, M.P.Carpenter, P.Chowdhury, D.Cline, H.L.Crawford, P.Fallon, A.M.Forney, A.Gade, A.B.Hayes, F.G.Kondev, Krishichayan, T.Lauritsen, J.Li, A.O.Macchiavelli, D.Rhodes, D.Seweryniak, S.M.Stolze, W.B.Walters, J.Wu

Evidence for Rigid Triaxial Deformation in 76Ge from a Model-Independent Analysis

NUCLEAR REACTIONS 208Pb(76Ge, 76Ge'), E=304, 291, 317 MeV; measured reaction products, Eγ, Iγ. 76Ge; deduced γ-ray energies, E2 matrix elements, quadrupole asymmetry for bands, triaxial deformation.

doi: 10.1103/physrevlett.123.102501
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2019DE15      Phys.Rev. C 99, 044604 (2019)

V.V.Desai, W.Loveland, K.McCaleb, R.Yanez, G.Lane, S.S.Hota, M.W.Reed, H.Watanabe, S.Zhu, K.Auranen, A.D.Ayangeakaa, M.P.Carpenter, J.P.Greene, F.G.Kondev, D.Seweryniak, R.V.F.Janssens, P.A.Copp

The 136Xe + 198Pt reaction: A test of models of multi-nucleon transfer reactions

NUCLEAR REACTIONS 198Pt(136Xe, X)43K/69mZn/72Zn/72As/73Ga/96Nb/97Zr/99Mo/99mTc/105Rh/110In/112Pd/115mIn/120mSb/122Sb/124I/125Xe/126Sb/127Sb/127Xe/127Cs/128Sb/130I/132I/131mTe/131Ba/132I/132Cs/133I/133mXe/135I/135Xe/135mBa/136Cs/140Ba/140La/142Pr/143Ce/153Sm/154Tb/157Dy/169Lu/173Hf/175Hf/176Ta/177Ta/180mHf/181Re/182Re/182Os/183Os/184Ta/188Re/188Ir/189Re/190Ir/191Pt/193Au/194Ir/194Au/195mIr/195mPt/195mHg/196mIr/196mAu/197Hg/198Au/199Au/200mAu/200Tl/200Pb/201Tl/201Pb/202Tl/202mPb/203Hg/203Pb/204Bi, E=760.5 MeV; measured Eγ, Iγ, cumulative and independent yields and σ of projectile-like, fission and target-like fragments using Gammasphere array for online γ detection and an HPGe detector for offline γ spectroscopy at ATLAS-ANL facility. Comparison with predictions of GRAZING, di-nuclear systems (DNS), and improved quantum molecular dynamics (ImQMD) models for multi-nucleon transfer reactions, and with previous experimental results.

doi: 10.1103/PhysRevC.99.044604
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2019EL08      Phys.Rev. C 100, 034317 (2019)

B.Elman, A.Gade, R.V.F.Janssens, A.D.Ayangeakaa, D.Bazin, J.Belarge, P.C.Bender, B.A.Brown, C.M.Campbell, M.P.Carpenter, H.L.Crawford, B.P.Crider, P.Fallon, A.M.Forney, J.Harker, S.N.Liddick, B.Longfellow, E.Lunderberg, C.J.Prokop, J.Sethi, R.Taniuchi, W.B.Walters, D.Weisshaar, S.Zhu

Probing the role of proton cross-shell excitations in 70Ni using nucleon knockout reactions

NUCLEAR REACTIONS 9Be(71Cu, 70Ni), E=80.2 MeV/nucleon; 9Be(71Ni, 70Ni), E=82.6 MeV/nucleon; 9Be(72Zn, 70Ni), E=76.5 MeV/nucleon, [secondary 71Cu, 71Ni, 71Zn beams from 9Be(76Ge, X), E=130 MeV/nucleon primary reaction at the K500 and K1200 coupled cyclotrons of NSCL-MSU]; measured yields of reaction products, Eγ, Iγ, γγ- and (knockout residues)γ-coin using GRETINA array for γ detection, and CsI(Na) hodoscope array for reaction residues. 70Ni; deduced levels, J, π, configurations. Comparison with shell-model calculations for only the neutron excitations using the jj44pna effective interaction.

doi: 10.1103/PhysRevC.100.034317
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2019GA01      Phys.Rev. C 99, 011301 (2019)

A.Gade, R.V.F.Janssens, J.A.Tostevin, D.Bazin, J.Belarge, P.C.Bender, S.Bottoni, M.P.Carpenter, B.Elman, S.J.Freeman, T.Lauritsen, S.M.Lenzi, B.Longfellow, E.Lunderberg, A.Poves, L.A.Riley, D.K.Sharp, D.Weisshaar, S.Zhu

Structure of 70Fe: Single-particle and collective degrees of freedom

NUCLEAR REACTIONS 9Be(71Co, 70Fe), E=87 MeV/nucleon, [secondary 71Co beam from 9Be(82Se, X), E=140 MeV/nucleon primary reaction, followed by separation of 71Co ions using A1900 fragment separator]; measured Eγ, Iγ, (70Fe ions)γ- and γγ-coin, residue energy loss and time of flight, σ for one-proton removal, level half-lives by line-shape analysis using GRETINA array for γ detection and the S800 spectrograph for particle identification at the NSCL-MSU facility. 70Fe; deduced levels, J, π, . Comparison with LNPS large-scale shell-model calculations.

doi: 10.1103/PhysRevC.99.011301
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2019GA29      Phys.Rev. C 100, 044309 (2019)

E.R.Gamba, A.M.Bruce, S.Lalkovski, M.Rudigier, S.Bottoni, M.P.Carpenter, S.Zhu, J.T.Anderson, A.D.Ayangeakaa, T.A.Berry, I.Burrows, M.Carmona-Gallardo, R.J.Carroll, P.Copp, D.M.Cullen, T.Daniel, G.Fernandez-Martinez, J.P.Greene, L.A.Gurgi, D.J.Hartley, R.Ilieva, S.Ilieva, F.G.Kondev, T.Kroll, G.J.Lane, T.Lauritsen, I.Lazarus, G.Lotay, C.R.Nita, Zs.Podolyak, V.Pucknell, M.Reed, P.H.Regan, J.Rohrer, J.Sethi, D.Seweryniak, C.M.Shand, J.Simpson, M.Smolen, E.A.Stefanova, V.Vedia, O.Yordanov

Fast-timing measurements in the ground-state band of 114Pd

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-coin, level half-lives by fast-timing γγ(t) technique using Gammasphere array with 51 HPGe detectors, and FATIMA array with 25 LaBr3(Ce) detectors at the Argonne National Laboratory. 114Pd; deduced levels, J, π, half-lives for the first 2+, 4+ and 6+ states, B(E2), transition quadrupole moments, β2. Comparison of experimental B(E2) values with those predicted by the vibrator, rigid axial rotor, Wilets-Jean and Davydov-Filippov models. Systematics of B(E2) values for the first 2+ state in Z=44-48, N=56-74 even-even nuclei.

doi: 10.1103/PhysRevC.100.044309
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2019HA08      Phys.Rev.Lett. 122, 052701 (2019)

M.R.Hall, D.W.Bardayan, T.Baugher, A.Lepailleur, S.D.Pain, A.Ratkiewicz, S.Ahn, J.M.Allen, J.T.Anderson, A.D.Ayangeakaa, J.C.Blackmon, S.Burcher, M.P.Carpenter, S.M.Cha, K.Y.Chae, K.A.Chipps, J.A.Cizewski, M.Febbraro, O.Hall, J.Hu, C.L.Jiang, K.L.Jones, E.J.Lee, P.D.O'Malley, S.Ota, B.C.Rasco, D.Santiago-Gonzalez, D.Seweryniak, H.Sims, K.Smith, W.P.Tan, P.Thompson, C.Thornsberry, R.L.Varner, D.Walter, G.L.Wilson, S.Zhu

Key 19Ne States Identified Affecting γ-Ray Emission from 18F in Novae

NUCLEAR REACTIONS 19F(3He, t)19Ne, E=30 MeV; measured reaction products, Eγ, Iγ; deduced γ-ray energies, J, π, S-factor, reaction rates, resonance energies. Comparison with available data.

doi: 10.1103/PhysRevLett.122.052701
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2019HA14      Phys.Rev. C 99, 035805 (2019)

M.R.Hall, D.W.Bardayan, T.Baugher, A.Lepailleur, S.D.Pain, A.Ratkiewicz, S.Ahn, J.M.Allen, J.T.Anderson, A.D.Ayangeakaa, J.C.Blackmon, S.Burcher, M.P.Carpenter, S.M.Cha, K.Y.Chae, K.A.Chipps, J.A.Cizewski, M.Febbraro, O.Hall, J.Hu, C.L.Jiang, K.L.Jones, E.J.Lee, P.D.O'Malley, S.Ota, B.C.Rasco, D.Santiago-Gonzalez, D.Seweryniak, H.Sims, K.Smith, W.P.Tan, P.Thompson, C.Thornsberry, R.L.Varner, D.Walter, G.L.Wilson, S.Zhu

New γ-ray transitions observed in 19Ne with implications for the 15O(α, γ)19Ne reaction rate

NUCLEAR REACTIONS 19F(3He, t), E=30 MeV; measured triton spectra, Eγ, Iγ, tγ- and γγ-coin using Gammasphere array for γ detection with the silicon detector array ORRUBA Dual Detectors for Experimental Structure Studies (GODDESS) at ATLAS-ANL facility. 19Ne; deduced levels, J, π, and γ-branching ratios for the decay of 4.14- and 4.20-MeV states. 15O(α, γ)19Ne, E≈18-180 keV; calculated fractional contribution of the corrected branching ratios for the 4.14 MeV, 7/2- and 4.20 MeV, 9/2- states in 19Ne to astrophysical reaction rate, which is of significance in breakout from the hot CNO cycle in type I x-ray bursts. Comparison with previous experimental values.

doi: 10.1103/PhysRevC.99.035805
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2019IS03      Phys.Lett. B 788, 396 (2019)

L.W.Iskra, R.Broda, R.V.F.Janssens, M.P.Carpenter, B.Fornal, T.Lauritsen, T.Otsuka, T.Togashi, Y.Tsunoda, W.B.Walters, S.Zhu

Revised B(E3) transition rate and structure of the 3 - level in 96Zr

NUCLEAR STRUCTURE 96Zr; analyzed available data; deduced reduced value of B(E3) compared to the previous reports; calculated the collectivity of the octupole vibration arises from both proton and neutron excitations involving a large number of orbitals using the Monte Carlo shell-model.

NUCLEAR REACTIONS 238U(76Ge, X), (64Ni, X), (48Ca, X), (208Pb, X)96Zr, 208Pb, 198Pt(76Ge, X)96Zr, E not given; measured reaction products, Eγ, Iγ; deduced γ-ray relative intensities, B(E3), branching ratios.

doi: 10.1016/j.physletb.2018.10.069
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2019KE01      Phys.Rev. C 99, 011303 (2019)

R.Kern, R.Stegmann, N.Pietralla, G.Rainovski, M.P.Carpenter, R.V.F.Janssens, M.Lettmann, O.Moller, T.Moller, C.Stahl, V.Werner, S.Zhu

Nuclear isovector valence-shell excitation of 202Hg

NUCLEAR REACTIONS 12C(202Hg, 202Hg'), E=890 MeV; measured Eγ, Iγ, γ(θ), γγ-coin using the Gammasphere array at ATLAS-ANL facility. 202Hg; deduced levels, J, π, multipolarities, mixing ratios, B(E1), B(E2), B(E3), B(M1), mixed-symmetry 2+ state, upper limits for the F-spin mixing matrix elements from analysis of data for 136Ba, 138Ce, 202Hg, and 204Hg. Comparison with previous experimental values in the Nuclear Data Sheets.

doi: 10.1103/PhysRevC.99.011303
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2019KO28      Eur.Phys.J. A 55, 231 (2019)

N.Kobayashi, K.Miki, T.Hashimoto, C.Iwamoto, A.Tamii, N.Aoi, M.P.Carpenter, K.Hatanaka, J.Isaak, E.Ideguchi, S.Morinobu, S.Nakamura, S.Noji

Excitation and γ-decay coincidence measurements at the GRAF beamline for studies of pygmy and giant dipole resonances

doi: 10.1140/epja/i2019-12854-7
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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 156,157,158,159,160,161,162,163,164,165,166,168,170Er, 158,159,160,161,162,163,164,165,166,167,168,169,170,171,172Yb, 160,161,162,163,164,165,166,167,168,169,170,171,172,173,174Hf, 164,165,166,167,168,169,170,171,172,173,174,175,176,177W; calculated band-crossing frequencies of the first (AB) and the second (BC) i13/2 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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2019NE06      Phys.Rev. C 100, 014329 (2019)

D.Negi, S.K.Tandel, P.Chauhan, P.Chowdhury, R.V.F.Janssens, M.P.Carpenter, T.L.Khoo, F.G.Kondev, T.Lauritsen, C.J.Lister, D.Seweryniak, S.Zhu

Decoupled and semi-decoupled bands in 197Hg and 199Hg

NUCLEAR REACTIONS 197Au(209Bi, X)197Hg/199Hg, E=1450 MeV; measured Eγ, Iγ, γγ-coin, and γγ(θ)(DCO) using Gammasphere array at ATLAS-ANL facility. 197,199Hg; deduced high-spin levels, J, π, bands, decoupled positive-parity sequences, alignments, configurations, transition from oblate collective rotation at low spin to triaxial noncollective shapes at high spin; calculated quasiparticle levels and total energy surfaces using Ultimate Cranker calculations with standard Nilsson parameters. Systematics of positive-parity levels in A=193-200 even- and odd-A Hg isotopes.

doi: 10.1103/PhysRevC.100.014329
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2019RO12      Phys.Rev. C 100, 024320 (2019)

P.Roy, S.K.Tandel, S.Suman, P.Chowdhury, R.V.F.Janssens, M.P.Carpenter, T.L.Khoo, F.G.Kondev, T.Lauritsen, C.J.Lister, D.Seweryniak, S.Zhu

Isomers from intrinsic excitations in 200Tl and 201, 202Pb

NUCLEAR REACTIONS 197Au(207Pb, X), 200Tl/201Pb/202Pb, E=1430 MeV; measured Eγ, Iγ, three- and higher-fold γγ-coin, half-lives of isomers by γγ(t) using Gammasphere array with 100 Compton-suppressed HPGe detectors at ATLAS-ANL facility. 200Tl, 201,202Pb; deduced high-spin levels, isomers, multipolarities from intensity balances, B(E2), B(E3), configurations. Systematics of 13/2+ isomers in 197,199,201Pb, and 5+ and 7+ isomers in 196,198,200Tl.

doi: 10.1103/PhysRevC.100.024320
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2019SE06      Phys.Lett. B 792, 170 (2019), Erratum Phys.Lett. B 820, 136556 (2021)

N.Sensharma, U.Garg, S.Zhu, A.D.Ayangeakaa, S.Frauendorf, W.Li, G.H.Bhat, J.A.Sheikh, M.P.Carpenter, Q.B.Chen, J.L.Cozzi, S.S.Ghugre, Y.K.Gupta, D.J.Hartley, K.B.Howard, R.V.F.Janssens, F.G.Kondev, T.C.McMaken, R.Palit, J.Sethi, D.Seweryniak, R.P.Singh

Two-phonon wobbling in 135Pr

NUCLEAR STRUCTURE 135Pr; analyzed available data; deduced wobbling. Comparison with theoretical calculations in the framework of the quasiparticle triaxial rotor and triaxial projected shell models.

doi: 10.1016/j.physletb.2019.03.038
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2019SH34      Phys.Rev. C 100, 034309 (2019)

U.Shirwadkar, S.K.Tandel, P.Chowdhury, T.L.Khoo, I.Ahmad, M.P.Carpenter, J.P.Greene, R.V.F.Janssens, F.G.Kondev, T.Lauritsen, C.J.Lister, D.Peterson, D.Seweryniak, X.Wang, S.Zhu

Decay spectroscopy of two-quasiparticle K isomers in 246, 248Cm via inelastic and transfer reactions

NUCLEAR REACTIONS 248Cm(209Bi, 209Bi'), 248Cm(209Bi, X)246Cm, E=1450 MeV from ATLAS-ANL accelerator facility, with bursts between 1 μs to 8 s; measured Eγ, Iγ, γγ-coin, half-lives of isomers in 246Cm and 248Cm by γ(t) using Gammasphere array. 246,248Cm; deduced levels, J, π, K-isomers, two-quasineutron Nilsson configurations, reduced K hindrances, persistence of a deformed subshell gap at N=152 near Z≈100 from systematics of Kπ=8-, two-quasineutron isomeric states in N=150, Z=94-102 even-even nuclei.

doi: 10.1103/PhysRevC.100.034309
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2019WA22      Phys.Rev. C 100, 014328 (2019)

S.G.Wahid, S.K.Tandel, P.Chowdhury, R.V.F.Janssens, M.P.Carpenter, T.L.Khoo, F.G.Kondev, T.Lauritsen, C.J.Lister, D.Seweryniak, S.Zhu, Q.B.Chen, J.Meng

Structure of odd-A Pt isotopes along the line of stability

NUCLEAR REACTIONS 197Au(209Bi, X)193Pt/195Pt/197Pt, E=1450 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ)(DCO), half-lives of isomers by centroid-shift technique using the Gammasphere array at ATLAS-ANL facility. 193,195,197Pt; deduced levels, J, π, multipolarities, alignments, configurations. Comparison with theoretical calculations.

NUCLEAR STRUCTURE 193,195,197Pt; calculated levels, J, π, total energy surfaces, and B(E2); deduced shapes and band crossings. Tilted axis cranking covariant density functional theory (TAC-CDFT) using the Ultimate Cranker code. Comparison with experimental data. Systematics of positive-parity levels in A=189-196 even- and odd-A Pt isotopes.

doi: 10.1103/PhysRevC.100.014328
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2019WR01      Eur.Phys.J. A 55, 130 (2019)

K.Wrzosek-Lipska, K.Rezynkina, N.Bree, M.Zielinska, L.P.Gaffney, A.Petts, A.Andreyev, B.Bastin, M.Bender, A.Blazhev, B.Bruyneel, P.A.Butler, M.P.Carpenter, J.Cederkall, E.Clement, T.E.Cocolios, A.N.Deacon, J.Diriken, A.Ekstrom, C.Fitzpatrick, L.M.Fraile, Ch.Fransen, S.J.Freeman, J.E.Garcia-Ramos, K.Geibel, R.Gernhauser, T.Grahn, M.Guttormsen, B.Hadinia, K.Hadynska-Klek, M.Hass, P.-H.Heenen, R.-D.Herzberg, H.Hess, K.Heyde, M.Huyse, O.Ivanov, D.G.Jenkins, R.Julin, N.Kesteloot, Th.Kroll, R.Krucken, A.C.Larsen, R.Lutter, P.Marley, P.J.Napiorkowski, R.Orlandi, R.D.Page, J.Pakarinen, N.Patronis, P.J.Peura, E.Piselli, L.Prochniak, P.Rahkila, E.Rapisarda, P.Reiter, A.P.Robinson, M.Scheck, S.Siem, K.Singh Chakkal, J.F.Smith, J.Srebrny, I.Stefanescu, G.M.Tveten, P.Van Duppen, J.Van de Walle, D.Voulot, N.Warr, A.Wiens, J.L.Wood

Electromagnetic properties of low-lying states in neutron-deficient Hg isotopes: Coulomb excitation of 182Hg, 184Hg, 186Hg and 188Hg

NUCLEAR REACTIONS 112Cd(182Hg, 182Hg'), E=519 MeV; 120Sn, 107Ag, 112Cd(184Hg, 184Hg'), E=524 MeV; 120Sn, 107Ag, 114Cd(186Hg, 186Hg'), E=530 MeV; 120Sn, 107Ag, 114Cd(188Hg, 188Hg'), E=536 MeV; measured reaction products, Eγ, Iγ, X-rays. 182,184,186,188Hg; deduced γ-ray energies, J, π, transition E2 and M1 reduced matrix elements, branching ratios, B(E2). Comparison with theoretical calculations, GOSIA analysis. The Miniball set-up, REX postaccelerator.

doi: 10.1140/epja/i2019-12815-2
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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 T1/2. 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, T1/2. 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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2018GA23      Acta Phys.Pol. B49, 555 (2018)

E.R.Gamba, A.M.Bruce, M.Rudigier, S.Lalkovski, S.Bottoni, M.P.Carpenter, S.Zhu, A.D.Ayangeakaa, J.T.Anderson, T.A.Berry, I.Burrows, R.J.Carrol, P.Copp, M.Carmona-Gallardo, D.M.Cullen, T.Daniel, G.Fernandez-Martinez, J.P.Greene, L.A.Gurgi, D.J.Hartley, R.Ilieva, S.Ilieva, R.V.F.Janssens, F.G.Kondev, T.Kroll, G.J.Lane, T.Lauritsen, I.Lazarus, G.Lotay, C.R.Nita, Zs.Podolyak, V.Pucknell, M.Reed, P.H.Regan, J.Rohrer, J.Sethi, D.Seweryniak, C.M.Shand, J.Simpson, M.Smolen, V.Vedia, E.A.Stefanova, O.Yordanov

Fast-timing Measurements in 100Zr Using LaBr3(Ce) Detectors Coupled with Gammasphere

RADIOACTIVITY 252Cf(SF); measured 100Zr fission fragment 4+ state Eγ, Iγ, T1/2, fission partners fragments using Digital Gammasphere (DGS) acquisition with hybrid detector made of 51 HPGe from Gammasphere and 25 LaBr3(Ce) scintillators (part of UK NuSTAR Collaboration); deduced first excited state T1/2, deformation, quadrupole moment, B(E2), LaBr3(Ce) γ-γ matrix, DGS γ-γ matrix, centroid difference between delayed and anti-delayed time distributions. Results preliminary, the main aim was the feasibility study.

doi: 10.5506/aphyspolb.49.555
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2018HA19      Phys.Rev.Lett. 120, 182502 (2018)

D.J.Hartley, F.G.Kondev, R.Orford, J.A.Clark, G.Savard, A.D.Ayangeakaa, S.Bottoni, F.Buchinger, M.T.Burkey, M.P.Carpenter, P.Copp, D.A.Gorelov, K.Hicks, C.R.Hoffman, C.Hu, R.V.F.Janssens, J.W.Klimes, T.Lauritsen, J.Sethi, D.Seweryniak, K.S.Sharma, H.Zhang, S.Zhu, Y.Zhu

Masses and β-Decay Spectroscopy of Neutron-Rich Odd-Odd 160, 162Eu Nuclei: Evidence for a Subshell Gap with Large Deformation at N=98

RADIOACTIVITY 160,162Eu(β-); measured decay products, Eγ, Iγ; deduced γ-ray energies, partial level scheme, T1/2.

ATOMIC MASSES 160,162Eu; measured frequency ratios; deduced mass excess (ME) for the ground and isomeric states.

doi: 10.1103/PhysRevLett.120.182502
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2018JI01      Phys.Rev. C 97, 012801 (2018)

C.L.Jiang, D.Santiago-Gonzalez, S.Almaraz-Calderon, K.E.Rehm, B.B.Back, K.Auranen, M.L.Avila, A.D.Ayangeakaa, S.Bottoni, M.P.Carpenter, C.Dickerson, B.DiGiovine, J.P.Greene, C.R.Hoffman, R.V.F.Janssens, B.P.Kay, S.A.Kuvin, T.Lauritsen, R.C.Pardo, J.Sethi, D.Seweryniak, R.Talwar, C.Ugalde, S.Zhu, D.Bourgin, S.Courtin, F.Haas, M.Heine, G.Fruet, D.Montanari, D.G.Jenkins, L.Morris, A.Lefebvre-Schuhl, M.Alcorta, X.Fang, X.D.Tang, B.Bucher, C.M.Deibel, S.T.Marley

Reaction rate for carbon burning in massive stars

NUCLEAR REACTIONS 12C(12C, p)23Na, (12C, α)20Ne, E=5.5-10 MeV; measured Eγ, Iγ, (particle)γ-coin, σ(E) using Gammasphere array and an array of three annular double-sided silicon strip detectors at the ATLAS-ANL facility; deduced S factors and astrophysical reaction rates. Comparison with previous measurements, and with data from other reactions. Relevance to carbon burning is a critical phase for nucleosynthesis in massive stars.

doi: 10.1103/PhysRevC.97.012801
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2288.


2018JO01      Phys.Rev. C 97, 024327 (2018)

M.D.Jones, A.O.Macchiavelli, M.Wiedeking, L.A.Bernstein, H.L.Crawford, C.M.Campbell, R.M.Clark, M.Cromaz, P.Fallon, I.Y.Lee, M.Salathe, A.Wiens, A.D.Ayangeakaa, D.L.Bleuel, S.Bottoni, M.P.Carpenter, H.M.Davids, J.Elson, A.Gorgen, M.Guttormsen, R.V.F.Janssens, J.E.Kinnison, L.Kirsch, A.C.Larsen, T.Lauritsen, W.Reviol, D.G.Sarantites, S.Siem, A.V.Voinov, S.Zhu

Examination of the low-energy enhancement of the γ-ray strength function of 56Fe

NUCLEAR REACTIONS 56Fe(p, p'), E=16 MeV; measured Eγ, Iγ, γ(θ) for discrete and continuum γ rays, γ(linear polarization) for primary γ rays, pγγ-coin using GRETINA (Gamma-Ray Energy Tracking In-beam Nuclear Array) for γ detection and Washington University Phoswich Wall for protons; deduced multipolarity of continuum γ rays, γ-ray strength function (γSF) with the model-independent ratio method, low-energy enhancement, identical shapes for γSFs constructed with 2+ and 4+ final states consistent with Brink hypothesis. Comparison with previous experimental results.

doi: 10.1103/PhysRevC.97.024327
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Note: The following list of authors and aliases matches the search parameter M.Carpenter: , M.C.CARPENTER, M.H.CARPENTER, M.P.CARPENTER