Nuclear Science References (NSR)

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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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 T_1/2. Comparison with available data. The National Superconducting Cyclotron Laboratory (NSCL), the coupled cyclotron facility.

doi: 10.1016/j.nima.2023.168525
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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 T_1/2, 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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2023PA40 Eur.Phys.J. A 59, 276 (2023)

G.Pasqualato, S.Ansari, J.S.Heines, V.Modamio, A.Gorgen, W.Korten, J.Ljungvall, E.Clement, J.Dudouet, A.Lemasson, T.R.Rodriguez, J.M.Allmond, T.Arici, K.S.Beckmann, A.M.Bruce, D.Doherty, A.Esmaylzadeh, E.R.Gamba, L.Gerhard, J.Gerl, G.Georgiev, D.P.Ivanova, J.Jolie, Y.-H.Kim, L.Knafla, A.Korichi, P.Koseoglou, M.Labiche, S.Lalkovski, T.Lauritsen, H.-J.Li, L.G.Pedersen, S.Pietri, D.Ralet, J.M.Regis, M.Rudigier, S.Saha, E.Sahin, S.Siem, P.Singh, P.-A.Soderstrom, C.Theisen, T.Tornyi, M.Vandebrouck, W.Witt, M.Zielinska, D.Barrientos, P.Bednarczyk, G.Benzoni, A.J.Boston, H.C.Boston, A.Bracco, B.Cederwall, M.Ciemala, G.de France, C.Domingo-Pardo, J.Eberth, A.Gadea, V.Gonzalez, A.Gottardo, L.J.Harkness-Brennan, H.Hess, D.S.Judson, A.Jungclaus, S.M.Lenzi, S.Leoni, R.Menegazzo, D.Mengoni, C.Michelagnoli, D.R.Napoli, J.Nyberg, Zs.Podolyak, A.Pullia, F.Recchia, P.Reiter, K.Rezynkina, M.D.Salsac, E.Sanchis, M.Senyigit, M.Siciliano, J.Simpson, D.Sohler, O.Stezowski, J.J.Valiente-Dobon, D.Verney

Shape evolution in even-mass ^98-104Zr isotopes via lifetime measurements using the γγ coincidence technique

NUCLEAR REACTIONS ⁹Be(²³⁸U, X)⁹⁸Zr/¹⁰⁰Zr/¹⁰²Zr/¹⁰⁴Zr, E=6.2 MeV/nucleon; measured reaction products, Eγ, Iγ, γ-γ-coin. ¹⁰⁴Mo, ¹⁰²Nb; deduced γ-ray energies and relative intensities, J, π, level T_1/2, B(E2), shape coexistence. Comparison with calculated values. The Differential Decay Curve Method (DDCM), the Recoil Distance Doppler Shift technique. The magnetic spectrometer VAMOS++, GANIL, the Orsay Universal Plunger system.

doi: 10.1140/epja/s10050-023-01172-8
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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 K_α and K_β 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, T_1/2 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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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

νi_13/2 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, νi_13/2 bands, with the two signature partners, alignments and signature splitting. Discussed systematics of νi_13/2 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, T_1/2 using double-sided silicon strip detector (DSSD), and four HPGe clover detectors. ^183,183mHg; deduced levels, isomer, J, π, T_1/2 of g.s. and isomer, α branching ratio, K-conversion coefficient, multipolarity, B(M2), Nilsson configurations. ^187mPb; deduced T_1/2. Systematics of decay schemes of 13/2+ isomers in ^{175,177,179,181,183,185}Hg. 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, ^{109,111,113,115}Sn, ¹⁵³Yb, ¹⁶¹Hf, ¹⁶³W, ¹⁶³Os, ^171,189,191Pt, ^{181,183,201,203,205}Hg, 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 T_1/2, 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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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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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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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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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, T_1/2 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 T_1/2 of isomers of >1 micro-sec half-life above 7-MeV excitations across the nuclear chart. ^{202,203,204,205}Tl, ^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, T_1/2 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,188}Pb, ^189,189mBi; deduced recoil-decay tagging (RDT) γ-ray yields. ¹⁸⁸Bi; deduced levels, J, π, isomer, T_1/2 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,188}Pb, ^188,189,189mBi; observed Eα. Systematics of 9/2-, 1/2+, 7/2- and 13/2+ level energies in ^{185,187,189,191,193,195}Bi, and those of first 2+, 4+, 6+ and 8+, second 0+, 2+ and 4+ in ^{188,190,192,194,196,198,200,202,204,206,208,210}Po.

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, Γ_p, Γ_γ, resonance strengths by comparing with the level structures of mirror nucleus ²⁶Mg. ²⁵Al(p, γ)²⁶Si, T=0.2-0.4 GK; deduced stellar reaction rate by considering the contribution of resonant states in ²⁶Si, galactic abundance of ²⁶Al from classical novae; performed nova outburst simulations using the hydrodynamic Lagrangian time-implicit code SHIVA.

doi: 10.1103/PhysRevC.104.L022802
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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, T_1/2, 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, 161}Gd

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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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 T_z = -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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2021PR11 Phys.Rev. C 104, 044318 (2021)

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

Shapes, softness, and nonyrast collectivity in ¹⁸⁶W

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

doi: 10.1103/PhysRevC.104.044318
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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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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 ^{192,194,196,198,200,202,204}Hg.

doi: 10.1103/PhysRevC.103.014319
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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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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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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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2020MA16 Phys.Rev. C 101, 044312 (2020)

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

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

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

doi: 10.1103/PhysRevC.101.044312
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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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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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2019AU02 Phys.Lett. B 792, 187 (2019)

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

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

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

doi: 10.1016/j.physletb.2019.03.039
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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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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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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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2019KO16 Eur.Phys.J. A 55, 121 (2019)

A.Korichi, T.Lauritsen

Tracking γ rays in highly segmented HPGe detectors: A review of AGATA and GRETINA

doi: 10.1140/epja/i2019-12787-1
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2019LO09 Eur.Phys.J. A 55, 109 (2019)

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

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

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

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

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

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

doi: 10.1103/PhysRevC.100.014302
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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, 202}Pb

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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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, 248}Cm 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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2019ZH49 Phys.Lett. B 799, 135036 (2019)

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

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

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

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

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

Superallowed α Decay to Doubly Magic ¹⁰⁰Sn

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

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

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

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

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

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

doi: 10.1103/PhysRevC.98.024324
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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, T_1/2, 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 T_1/2, 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, 162}Eu 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, T_1/2.

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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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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2018LU08 Phys.Rev. C 97, 044312 (2018)

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

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

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

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

doi: 10.1103/PhysRevC.97.044312
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2018RE09 Phys.Rev. C 98, 014328 (2018)

W.Reviol, D.G.Sarantites, J.M.Elson, J.E.Kinnison, A.Gargano, R.V.F.Janssens, J.M.Allmond, A.D.Ayangeakaa, S.Bottoni, M.P.Carpenter, H.M.David, A.Galindo-Uribarri, N.Itaco, T.Lauritsen, E.Padilla-Rodal, S.Zhu

Low-spin structure of the N=82 nucleus ¹³⁷Cs

NUCLEAR REACTIONS ¹⁰B(¹³⁶Xe, ⁹Be), E=560 MeV; measured Eγ, Iγ, particle spectra, γγ- and (⁹Be)γ-coin, γ(θ) using Gammasphere array for γ detection and Phoswich Wall array for charged particle detection at ATLAS-ANL. ¹³⁷Cs; deduced levels, J, π, multipolarities, configurations. Comparison of level spectra with shell-model calculations. Systematics of level energies in N=82 ¹³³Sb, ¹³⁵I, and ¹³⁷Cs isotones.

doi: 10.1103/PhysRevC.98.014328
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2018ST06 Phys.Lett. B 779, 456 (2018)

I.Stefan, B.Fornal, S.Leoni, F.Azaiez, C.Portail, J.C.Thomas, A.V.Karpov, D.Ackermann, P.Bednarczyk, Y.Blumenfeld, S.Calinescu, A.Chbihi, M.Ciemala, N.Cieplicka-Orynczak, F.C.L.Crespi, S.Franchoo, F.Hammache, L.W.Iskra, B.Jacquot, R.V.F.Janssens, O.Kamalou, T.Lauritsen, M.Lewitowicz, L.Olivier, S.M.Lukyanov, M.Maccormick, A.Maj, P.Marini, I.Matea, M.A.Naumenko, F.de Oliveira Santos, C.Petrone, Yu.E.Penionzhkevich, F.Rotaru, H.Savajols, O.Sorlin, M.Stanoiu, B.Szpak, O.B.Tarasov, D.Verney

Neutron-rich nuclei produced at zero degrees in damped collisions induced by a beam of ¹⁸O on a ²³⁸U target

NUCLEAR REACTIONS ²³⁸U(¹⁸O, X)¹²B/¹³B/¹⁴B/¹⁵B/¹³C/¹⁴C/¹⁵C/¹⁶C/¹⁷C/¹⁸C/¹⁹C, ¹⁴N/¹⁵N/¹⁶N/¹⁷N/¹⁸N/¹⁹N/²⁰N, ¹⁶O/¹⁷O/¹⁸O/¹⁹O/²⁰O/²¹O/²²O, ¹⁷F/¹⁸F/¹⁹F/²⁰F/²¹F/²²F/²³F/²⁴F/²²Ne/²³Ne/²⁴Ne/²⁵Ne, E=8.5 MeV/nucleon; measured reaction products; deduced σ(θ), momentum distributions. Comparison with theoretical calculations.

doi: 10.1016/j.physletb.2018.02.037
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2018WA22 Phys.Rev. C 98, 024313 (2018)

R.Wadsworth, N.S.Kelsall, D.G.Jenkins, I.Ragnarsson, S.M.Fischer, D.P.Balamuth, P.A.Hausladen, G.C.Ball, M.P.Carpenter, R.V.F.Janssens, T.Lauritsen, C.J.Lister, D.Seweryniak, R.M.Clark, P.Fallon, A.O.Macchiavelli, C.E.Svensson, S.J.Freeman, D.G.Sarantites

Terminating states in the positive-parity structures of ⁶⁷As

NUCLEAR REACTIONS ⁴⁰Ca(³⁶Ar, p2α), E=145 MeV; measured Eγ, Iγ, γγ- and (particle)γ-coin, γγ(θ)(DCO) using Gammasphere array for γ detection, and MICROBALL CsI array for charged particles at ATLAS-ANL facility. ⁶⁷As; deduced levels, J, π, multipolarities, bands, and noncollective terminating states; calculated tilted Fermi-surface plots for protons and neutrons. Comparison with configuration dependent cranked Nilsson-Strutinsky calculations.

doi: 10.1103/PhysRevC.98.024313
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2018WI09 Phys.Rev. C 98, 041302 (2018)

W.Witt, V.Werner, N.Pietralla, M.Albers, A.D.Ayangeakaa, B.Bucher, M.P.Carpenter, D.Cline, H.M.David, A.Hayes, C.Hoffman, R.V.F.Janssens, B.P.Kay, F.G.Kondev, W.Korten, T.Lauritsen, O.Moller, G.Rainovski, G.Savard, D.Seweryniak, J.Smith, R.Stegmann, S.Zhu, C.Y.Wu

Sub-shell closure and shape coexistence in the transitional nucleus ⁹⁸Zr

NUCLEAR REACTIONS ¹⁹⁶Pt(⁹⁸Zr, ⁹⁸Zr'), E=464 MeV from CARIBU source at ATLAS-ANL facility; measured recoils, Eγ, Iγ, (recoil)γ-coin using CHICO2 array of segmented parallel-plate avalanche counter (PPAC) for recoil detection, and GRETINA array of segmented HPGe detectors for γ detection. Coulomb excitation. ⁹⁸Zr; deduced levels, upper limit of B(E2) for the first 2+ state. Comparison with shell model and Monte-Carlo shell model calculations, and with previous experimental values. Systematics of B(E2) values for the first 2+ states in ^{90,92,94,96,98,100,102,104,106}Zr.

doi: 10.1103/PhysRevC.98.041302
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2017AM01 Phys.Rev. C 95, 014330 (2017)

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

γ-ray spectroscopy of ²⁰⁹Tl

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

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

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

Nucleon correlations and the structure of ⁷¹₃₀Zn₄₁

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

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

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

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

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

doi: 10.1103/PhysRevC.95.064308
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2017BU07 Phys.Rev.Lett. 118, 152504 (2017)

B.Bucher, S.Zhu, C.Y.Wu, R.V.F.Janssens, R.N.Bernard, L.M.Robledo, T.R.Rodriguez, D.Cline, A.B.Hayes, A.D.Ayangeakaa, M.Q.Buckner, C.M.Campbell, M.P.Carpenter, J.A.Clark, H.L.Crawford, H.M.David, C.Dickerson, J.Harker, C.R.Hoffman, B.P.Kay, F.G.Kondev, T.Lauritsen, A.O.Macchiavelli, R.C.Pardo, G.Savard, D.Seweryniak, R.Vondrasek

Direct Evidence for Octupole Deformation in ¹⁴⁶Ba and the Origin of Large E1 Moment Variations in Reflection-Asymmetric Nuclei

NUCLEAR REACTIONS ²⁰⁸Pb(¹⁴⁶Ba, ¹⁴⁶Ba'), E=659 MeV; measured reaction products, Eγ, Iγ. ^144,146,148Ba; deduced energy levels, J, π, B(Eλ), quadrupole and octupole deformation parameters. Calculated HFB potential energy surfaces, neutron single-particle energies. Coulomb excitation, comparison with available data.

doi: 10.1103/PhysRevLett.118.152504
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2017CR03 Phys.Rev. C 95, 064317 (2017)

H.L.Crawford, A.O.Macchiavelli, P.Fallon, M.Albers, V.M.Bader, D.Bazin, C.M.Campbell, R.M.Clark, M.Cromaz, J.Dilling, A.Gade, A.Gallant, J.D.Holt, R.V.F.Janssens, R.Krucken, C.Langer, T.Lauritsen, I.Y.Lee, J.Menendez, S.Noji, S.Paschalis, F.Recchia, J.Rissanen, A.Schwenk, M.Scott, J.Simonis, S.R.Stroberg, J.A.Tostevin, C.Walz, D.Weisshaar, A.Wiens, K.Wimmer, S.Zhu

Unexpected distribution of ν1f_7/2 strength in ⁴⁹Ca

NUCLEAR REACTIONS ⁹Be(⁴⁸Ca, ⁴⁷Ca), (⁵⁰Ca, ⁴⁹Ca), E not given, [secondary ^48,50Ca beams from ⁹Be(⁸²Se, X), E=140 MeV/nucleon primary reaction, and using A1900 fragment separator at NSCL-MSU]; measured reaction 1n-knockout products using S800 magnetic spectrograph, Eγ, Iγ, γγ-coin, γ(particle) correlated events, using GRETINA array for γ detection, σ(-1n), parallel momentum distributions. ^47,49Ca; deduced levels, J, π, l-transfer, γ-ray yields by fitting the data with GEANT4 simulation, spectroscopic factors, configurations, spectroscopic strengths for the 1f_7/2 neutron hole states. Comparison with shell-model calculations based on NN+3N force in ν(pf) model space, GXPF1 interaction, and NN+3N including the ν1g_9/2 orbital.

doi: 10.1103/PhysRevC.95.064317
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2017DO01 Phys.Lett. B 766, 334 (2017)

D.T.Doherty, J.M.Allmond, R.V.F.Janssens, W.Korten, S.Zhu, M.Zielinska, D.C.Radford, A.D.Ayangeakaa, B.Bucher, J.C.Batchelder, C.W.Beausang, C.Campbell, M.P.Carpenter, D.Cline, H.L.Crawford, H.M.David, J.P.Delaroche, C.Dickerson, P.Fallon, A.Galindo-Uribarri, F.G.Kondev, J.L.Harker, A.B.Hayes, M.Hendricks, P.Humby, M.Girod, C.J.Gross, M.Klintefjord, K.Kolos, G.J.Lane, T.Lauritsen, J.Libert, A.O.Macchiavelli, P.J.Napiorkowski, E.Padilla-Rodal, R.C.Pardo, W.Reviol, D.G.Sarantites, G.Savard, D.Seweryniak, J.Srebrny, R.Varner, R.Vondrasek, A.Wiens, E.Wilson, J.L.Wood, C.Y.Wu

Triaxiality near the ¹¹⁰Ru ground state from Coulomb excitation

NUCLEAR REACTIONS ²⁰⁸Pb(¹¹⁰Ru, ¹¹⁰Ru'), E=430 MeV; measured reaction products, Eγ, Iγ; deduced γ-ray energy spectrum, B(E2) using GOSIA fit of the experimental data, level scheme, J, π, triaxial deformation. Comparison with available data.

doi: 10.1016/j.physletb.2017.01.031
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2017HA03 Phys.Rev. C 95, 014321 (2017)

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

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

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

doi: 10.1103/PhysRevC.95.014321
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2017LA09 Phys.Scr. 92, 074002 (2017)

T.Lauritsen, A.Korichi, T.L.Khoo, M.P.Carpenter, R.V.F.Janssens, L.A.Riley, D.Seweryniak, S.Zhu

Measuring the entry distribution and the quasi-continuum of γ rays with tracking arrays

doi: 10.1088/1402-4896/aa709c
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2017MA39 Phys.Rev. C 96, 014318 (2017)

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

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

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

doi: 10.1103/PhysRevC.96.014318
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2017RU02 Acta Phys.Pol. B48, 351 (2017)

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

Fast Timing Measurement Using an LaBr3(Ce) Scintillator Detector Array Coupled with Gammasphere

doi: 10.5506/APhysPolB.48.351
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2017TA18 Phys.Rev. C 96, 014323 (2017)

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

Cross-shell excitations in ³¹Si

NUCLEAR REACTIONS ¹⁸O(¹⁸O, nα)³¹Si, E=24 MeV; measured Eα, Eγ, Iγ, γγ-, αγ-coin using Gammasphere and Microball detector arrays at ATLAS-ANL facility. ³¹Si; deduced levels, J, π, configurations, radiative decays from neutron-unbound levels. Comparison with resonances observed previously in ³⁰Si(n, n) reaction, and with shell-model calculations using USDA and WBP cross-shell interactions.

NUCLEAR STRUCTURE ^29,31,33Si; calculated levels, J, π using shell model with the WBP-b interaction. Comparison with experimental data. ³⁰Si(d, p)³¹Si; calculated single-neutron spectroscopic factors using the USDA (WBP-b) interaction, and compared with experimental data.

doi: 10.1103/PhysRevC.96.014323
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2017WE06 Phys.Lett. B 771, 119 (2017)

T.Welsh, W.Loveland, R.Yanez, J.S.Barrett, E.A.McCutchan, A.A.Sonzogni, T.Johnson, S.Zhu, J.P.Greene, A.D.Ayangeakaa, M.P.Carpenter, T.Lauritsen, J.L.Harker, W.B.Walters, B.M.S.Amro, P.Copp

Modeling multi-nucleon transfer in symmetric collisions of massive nuclei

NUCLEAR REACTIONS ¹⁹⁸Pt(²⁰⁴Hg, X), E=1360 MeV; measured reaction products, Eγ, Iγ; deduced fragment yields, σ. Comparison with GRAZING and DNS models.

doi: 10.1016/j.physletb.2017.05.044
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2016AL18 Phys.Rev. C 94, 034301 (2016)

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

Single-particle and collective excitations in ⁶²Ni

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

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

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

Shape coexistence and the role of axial asymmetry in ⁷²Ge

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

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

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

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

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

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

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

In-beam γ spectroscopy of ⁶³Mn

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

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

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

Direct Evidence of Octupole Deformation in Neutron-Rich ¹⁴⁴Ba

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

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

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

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

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

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

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

First observation of rotational structures in ¹⁶⁸Re

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

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

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

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

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

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

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

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

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

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

doi: 10.1103/PhysRevC.93.014303
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2016LO07 Prog.Part.Nucl.Phys. 89, 137 (2016)

A.Lopez-Martens, T.Lauritsen, S.Leoni, T.Dossing, T.L.Khoo, S.Siem

Population and decay of superdeformed nuclei probed by discrete and quasi-continuum γ-ray spectroscopy

doi: 10.1016/j.ppnp.2016.02.003
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2016MU06 Phys.Rev. C 93, 065803 (2016)

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

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

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

doi: 10.1103/PhysRevC.93.065803
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2016NA29 Phys.Rev. C 94, 034307 (2016)

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

Observation of high-spin bands with large moments of inertia in ¹²⁴Xe

NUCLEAR REACTIONS ⁸⁰Se(⁴⁸Ca, 4n)¹²⁴Xe, E=207 MeV; measured Eγ, Iγ, γγ-coin using GAMMASPHERE array at ATLAS-ANL facility. ¹²⁴Xe; deduced high-spin levels, J, π, bands, moment of inertia plots, configurations; calculated total-energy surface contours Comparison with cranked Nilsson-Strutinsky calculations. Systematics of alignment plots in ¹²⁰Te, ¹²⁵I, ^124,125,126Xe, ¹²⁴Ba, ¹³²Ce.

doi: 10.1103/PhysRevC.94.034307
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2016PE09 Phys.Rev. C 93, 064305 (2016)

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

Triaxiality and exotic rotations at high spins in ¹³⁴Ce

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

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

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

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

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

doi: 10.1103/PhysRevC.94.064309
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2016RE02 Phys.Lett. B 752, 311 (2016)

M.W.Reed, G.J.Lane, G.D.Dracoulis, F.G.Kondev, M.P.Carpenter, P.Chowdhury, S.S.Hota, R.O.Hughes, R.V.F.Janssens, T.Lauritsen, C.J.Lister, N.Palalani, D.Seweryniak, H.Watanabe, S.Zhu, W.G.Jiang, F.R.Xu

Impact of triaxiality on the rotational structure of neutron-rich rhenium isotopes

NUCLEAR REACTIONS ¹⁹²Os(¹³⁶Xe, X)¹⁸⁷Re, ¹⁸⁷Re(¹³⁶Xe, X)¹⁸⁹Re, ¹⁸⁶W(¹³⁶Xe, X)¹⁹¹Re, E=6 MeV/nucleon; measured reaction products, Eγ, Iγ; deduced level scheme, γ-ray energies, J, π, rotational bands, triaxiality. Comparison with particle-triaxial-rotor calculations.

doi: 10.1016/j.physletb.2015.11.056
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2016RE15 Phys.Rev. C 94, 034309 (2016)

W.Reviol, D.G.Sarantites, J.M.Elson, J.E.Kinnison, A.Gargano, S.Bottoni, R.V.F.Janssens, J.M.Allmond, A.D.Ayangeakaa, M.P.Carpenter, H.M.David, A.Galindo-Uribarri, N.Itaco, T.Lauritsen, E.Padilla-Rodal, S.Zhu

One-neutron transfer study of ¹³⁷Xe and systematics of 13/2⁺₁ and 13/2⁺₂ levels in N=83 nuclei

NUCLEAR REACTIONS ¹³C(¹³⁶Xe, ¹²C)¹³⁷Xe, ⁹Be(¹³⁶Xe, ⁸Be)¹³⁷Xe, E=560 MeV; measured particle spectra, Eγ, Iγ, γ(θ), (particle)γ-, (particle)γγ-coin using Phoswich Wall and Digital Gammasphere arrays at ATLAS-ANL facility. ¹³⁷Xe; deduced levels, J, π, multipolarity, relative yields. One-neutron transfer reactions. Comparison with systematics of first and second 13/2+ states in N=83 isotones, and with shell-model calculations. ^135,137Xe, ¹³⁷Cs, ^139,140Ba, ¹⁴²Ce; observed γ rays from contaminants.

doi: 10.1103/PhysRevC.94.034309
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2016RE20 Phys.Rev. C 94, 054324 (2016)

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

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

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

doi: 10.1103/PhysRevC.94.054324
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