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NSR database version of March 21, 2024.

Search: Author = P.Chowdhury

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2024SA09      Phys.Rev. C 109, 024319 (2024)

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

Collective modes of excitation in 64Cu

doi: 10.1103/PhysRevC.109.024319
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2023AY02      Phys.Rev. C 107, 044314 (2023)

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

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

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

doi: 10.1103/PhysRevC.107.044314
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2023HA31      Phys.Rev. C 108, 034608 (2023)

K.Haak, O.B.Tarasov, P.Chowdhury, A.M.Rogers, K.Sharma, T.Baumann, D.Bazin, P.C.Bender, J.Chen, A.Estrade, M.A.Famiano, D.C.Foulds-Holt, N.Fukuda, A.Gade, T.N.Ginter, R.W.Gohier, M.Hausmann, A.M.Hill, D.E.M.Hoff, L.Klankowski, E.Kwan, J.Li, S.N.Liddick, B.Longfellow, S.Lyons, C.Morse, M.Portillo, D.Rhodes, A.L.Richard, S.Samaranayake, B.M.Sherrill, M.K.Smith, M.Spieker, C.S.Sumithrarachchi, H.Suzuki, K.Wang, S.Waniganeththi, D.Weisshaar, S.Zhu

Production and discovery of neutron-rich isotopes by fragmentation of 198Pt

NUCLEAR REACTIONS 9Be, Ni(198Pt, X)182Yb/183Lu/184Lu/185Lu/186Lu/187Lu/188Lu/189Lu/184Hf/185Hf/186Hf/187Hf/188Hf/189Hf/190Hf/191Hf/192Hf/185Ta/186Ta/187Ta/188Ta/189Ta/190Ta/191Ta/192Ta/193Ta/186W/187W/188W/189W/190W/191W/192W/193W/194W/187Re/188Re/189Re/190Re/191Re/192Re/193Re/194Re/195Re/196Re/190Os/191Os/192Os/193Os/194Os/195Os/196Os/197Os/192Ir/193Ir/194Ir/195Ir/196Ir/197Ir/198Ir, E=85 MeV/nucleon from the NSCL-MSU Coupled Cyclotron Facility (CCF); measured reaction products, particle identification spectra using A1900 fragment separator, S800 spectrograph for fragment analysis, PIN diode telescope of five silicon detectors for particle detection, γ rays using GRETINA array, and LISE+ Monte Carlo calculations of charge state fractions; deduced production cross sections of about 70 nuclei in Z=70-77 region. 189Lu, 191,192Hf; deduced new nuclides. 190W; measured γ-ray spectrum from the emission of a 166-μs isomer. Comparison of measured production cross sections with theoretical calculations using EFAX3 and COFRA codes. Numerical values of production cross sections are listed in the Supplemental Material.

doi: 10.1103/PhysRevC.108.034608
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2023LU07      Phys.Rev. C 108, 014329 (2023)

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

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

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

doi: 10.1103/PhysRevC.108.014329
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2023OG04      Phys.Rev. C 108, 034304 (2023)

T.H.Ogunbeku, B.P.Crider, S.N.Liddick, B.A.Brown, A.Chester, K.L.Childers, P.Chowdhury, E.Lamere, R.Lewis, B.Longfellow, R.S.Lubna, S.Lyons, S.K.Neupane, D.Perez-Loureiro, C.J.Prokop, A.L.Richard, U.Silwal, D.P.Siwakoti, D.C.Smith, M.K.Smith, Y.Xiao

First half-life measurement of a low-lying isomer in 37Si

doi: 10.1103/PhysRevC.108.034304
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2023SE09      Phys.Rev. C 107, L061302 (2023)

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

Nuclear rotation at the fission limit in 254Rf

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

doi: 10.1103/PhysRevC.107.L061302
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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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2022BO04      Phys.Rev. C 105, 044327 (2022)

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

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

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

doi: 10.1103/PhysRevC.105.044327
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2022HU21      Phys.Rev. C 106, L061301 (2022)

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

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

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

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

doi: 10.1103/PhysRevC.106.L061301
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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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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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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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2022SH22      Nucl.Instrum.Methods Phys.Res. A1035, 166789 (2022)

O.A.Shehu, B.P.Crider, T.Ginter, C.R.Hoffman, T.H.Ogunbeku, Y.Xiao, K.L.Childers, P.Chowdhury, C.Fry, E.Lamere, R.Lewis, S.N.Liddick, B.Longfellow, S.Lyons, S.K.Neupane, D.Perez-Loureiro, C.J.Prokop, A.L.Richard, U.Silwal, D.P.Siwakoti, D.C.Smith, M.K.Smith

Experimental study of the 34mCl beam production at intermediate energies

RADIOACTIVITY 34Cl(IT), (EC) [from 9Be(36Ar, X), E=150 MeV/nucleon]; measured decay products, Eγ, Iγ; deduced γ-ray energies, the beam production rates and isomeric state composition. The National Superconducting Cyclotron Laboratory (NSCL).

doi: 10.1016/j.nima.2022.166789
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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, T1/2 of isomers by γγ(t) using pulsed beam from ATLAS-ANL facility, and Gammasphere array for γ detection. 204Pb, 205,206Bi; deduced levels, isomers, J, π, configurations, nuclear isomerism from core-excited configurations in the vicinity of 208Pb. Comparison with shell-model predictions.

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

doi: 10.1016/j.physletb.2022.137262
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2021MI07      Phys.Rev. C 103, 024323 (2021)

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

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

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

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

doi: 10.1103/PhysRevC.103.024323
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2021PR11      Phys.Rev. C 104, 044318 (2021)

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

Shapes, softness, and nonyrast collectivity in 186W

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

doi: 10.1103/PhysRevC.104.044318
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2021SU02      Phys.Rev. C 103, 014319 (2021)

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

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

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

doi: 10.1103/PhysRevC.103.014319
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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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2020NA27      Phys.Rev.Lett. 25, 132501 (2020)

S.Nandi, G.Mukherjee, Q.B.Chen, S.Frauendorf, R.Banik, S.Bhattacharya, S.Dar, S.Bhattacharyya, C.Bhattacharya, S.Chatterjee, S.Das, S.Samanta, R.Raut, S.S.Ghugre, S.Rajbanshi, S.Ali, H.Pai, M.A.Asgar, S.Das Gupta, P.Chowdhury, A.Goswami

First Observation of Multiple Transverse Wobbling Bands of Different Kinds in 183Au

NUCLEAR REACTIONS 169Tm(20Ne, 6n)183Au, E=146 MeV; measured reaction products, Eγ, Iγ; deduced γ-ray energies, J, π, two wobbling bands. Comparison with systematics.

doi: 10.1103/PhysRevLett.125.132501
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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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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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2019CH57      Acta Phys.Pol. B50, 339 (2019)

P.Chowdhury

C7 LYC: A New Scintillator for Fast Neutron Spectroscopy

doi: 10.5506/aphyspolb.50.339
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2019MI12      Phys.Rev. C 100, 014302 (2019)

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

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

NUCLEAR STRUCTURE 156,157,158,159,160,161,162,163,164,165,166,168,170Er, 158,159,160,161,162,163,164,165,166,167,168,169,170,171,172Yb, 160,161,162,163,164,165,166,167,168,169,170,171,172,173,174Hf, 164,165,166,167,168,169,170,171,172,173,174,175,176,177W; calculated band-crossing frequencies of the first (AB) and the second (BC) i13/2 neutron alignments. 162Er, 164Yb, 166Hf, 168W: calculated AB and BC crossing frequencies as function of quadrupole deformation, and as function of the percentage of the odd-even mass difference for N=94 nuclei. Comparison with experimental data. A=134-200, Z=52-82; systematics of E(first 4+)/E(first 2+) ratios for even-even nuclei.

doi: 10.1103/PhysRevC.100.014302
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2019NE06      Phys.Rev. C 100, 014329 (2019)

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

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

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

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

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

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

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

doi: 10.1103/PhysRevC.100.024320
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2019SH34      Phys.Rev. C 100, 034309 (2019)

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

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

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

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

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

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

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

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

doi: 10.1103/PhysRevC.100.014328
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2018MO12      Phys.Lett. B 780, 227 (2018)

C.Morse, E.A.McCutchan, H.Iwasaki, C.J.Lister, V.M.Bader, D.Bazin, S.Beceiro Novo, P.Chowdhury, A.Gade, T.D.Johnson, C.Loelius, E.Lunderberg, E.Merchan, V.S.Prasher, F.Recchia, A.A.Sonzogni, D.Weisshaar, K.Whitmore

Enhanced collectivity in 12Be

NUCLEAR REACTIONS Ta, Nb(12Be, 12Be'), E ∼ 55 MeV/nucleon; measured reaction products, Eγ, Iγ. 12Be; deduced level lifetime, B(E2) values. Comparison with available data.

doi: 10.1016/j.physletb.2018.03.004
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2018SI28      Phys.Rev. C 98, 054307 (2018)

K.Siegl, K.Kolos, N.D.Scielzo, A.Aprahamian, G.Savard, M.T.Burkey, M.P.Carpenter, P.Chowdhury, J.A.Clark, P.Copp, G.J.Lane, C.J.Lister, S.T.Marley, E.A.McCutchan, A.J.Mitchell, J.Rohrer, M.L.Smith, S.Zhu

Β-decay half-lives of 134, 134mSb and their isomeric yield ratio produced by the spontaneous fission of 252Cf

RADIOACTIVITY 134m,134Sb(β-)[from 252Cf(SF), mass separated high-intensity beams]; measured Eβ, Iβ, Eγ, Iγ, βγ-coin, half-lives of decays of 134Sb and 134mSb, and isomeric yield ratios from 252Cf(SF) using the Scintillator And Tape Using Radioactive Nuclei (SATURN) system for β- detection, and X-Array for γ detection at the CARIBU facility of ANL. Systematics of isomeric yield ratios of 128,130,134Sb, 131,133Te, 132,134,136I, 135Xe, 138Cs from 252Cf(SF). Comparison with previous experimental values.

doi: 10.1103/PhysRevC.98.054307
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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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2017PR01      Nucl.Instrum.Methods Phys.Res. A846, 50 (2017)

V.S.Prasher, M.Cromaz, E.Merchan, P.Chowdhury, H.L.Crawford, C.J.Lister, C.M.Campbell, I.Y.Lee, A.O.Macchiavelli, D.C.Radford, A.Wiens

Sensitivity of GRETINA position resolution to hole mobility

doi: 10.1016/j.nima.2016.11.038
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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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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 πh11/2νi13/2 bands in 166,168,170,172,174Re. Systematics of signature splitting for πh11/2νi13/2 bands in 166,168,170,172,174Re, 164,166,168,170,172Ta, 162,164,166,168,170Lu.

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 Kπ = 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, (gk-gR)/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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2016MI02      Phys.Rev. C 93, 014306 (2016)

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

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

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

doi: 10.1103/PhysRevC.93.014306
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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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2016TA23      Phys.Rev. C 94, 064304 (2016)

S.K.Tandel, P.Chowdhury, F.G.Kondev, R.V.F.Janssens, T.L.Khoo, M.P.Carpenter, T.Lauritsen, C.J.Lister, D.Seweryniak, S.Zhu, A.Deacon, S.J.Freeman, N.J.Hammond, G.D.Jones, E.F.Moore, J.F.Smith

Configurations and decay hindrances of high-K states in 180Hf

NUCLEAR REACTIONS 180Hf(207Pb, X), E=1.4 GeV; measured Eγ, Iγ, γγ-coin, delayed γ, level and isomer half-lives by γγ(t) and centroid-shift method using Gammasphere array and heavy-ion detector CHICO at ATLAS-ANL facility. 180Hf; deduced high-spin levels, J, π, 2- and 4-qp states, multi-quasiparticle high-K states, rotational bands, reduced hindrances for E1, E2, E3, M1 and M2 transitions from isomers, (gK-gR)/Q0 as function of Jπ, configurations. Comparison with theoretical calculations using Lipkin-Nogami approach for pairing, with blocking included. Systematics of high-K states in 180Hf, 180,182W, and 182,184Os.

doi: 10.1103/PhysRevC.94.064304
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2015AY02      Phys.Rev. C 91, 044327 (2015)

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

Role of the νg9/2 orbital in the development of collectivity in the A≈60 region: The case of 61Co

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

doi: 10.1103/PhysRevC.91.044327
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2015TA25      Phys.Lett. B 750, 225 (2015)

S.K.Tandel, S.G.Wahid, 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 and oblate rotation in Pt isotopes: Delineating the limit for collectivity at high spins

NUCLEAR REACTIONS 197Au(209Bi, X)194Pt/196Pt/198Pt, E=1450 MeV; measured reaction products, Eγ, Iγ; deduced energy levels, J, π, high-spin B(E2). Cranking calculations using both standard Nilsson parameters in the Ultimate Cranker (UC) code.

doi: 10.1016/j.physletb.2015.09.019
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2015TH06      Nucl.Phys. A944, 333 (2015)

Ch.Theisen, P.T.Greenlees, T.-L.Khoo, P.Chowdhury, T.Ishii

In-beam spectroscopy of heavy elements

NUCLEAR REACTIONS 248Cm(209Bi, 207Bi), E not given; measured Eγ, Iγ, X-rays using GAMMASPHERE. 250Cm deduced high-spin states. Figure only, taken from S.S.Hota's PhD thesis (2012, possibly unpublished).

doi: 10.1016/j.nuclphysa.2015.07.014
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2015WA34      Phys.Rev. C 92, 054323 (2015)

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

Rotation-aligned isomer and oblate collectivity in 196Pt

NUCLEAR REACTIONS 197Au(209Bi, X)196Pt, E=1450 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ)(DCO), level and isomer half-lives by γγ(t) using Gammasphere array at ATLS-ANL. 196Pt; deduced high-spin levels, J, π, bands, multipolarity, B(E2), alignment plots, rotation-aligned isomeric state, configurations, shape evolution; calculated total energy surface plots. Comparison with cranked shell-model calculations. Systematics of level structures in 192,194,196,198Pt, and those of alignments in N=118 isotones 194Os, 196Pt and 198Hg.

doi: 10.1103/PhysRevC.92.054323
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2014HA22      Phys.Rev. C 90, 017301 (2014)

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

High-spin structure of odd-odd 172Re

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

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

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

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

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

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

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

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

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

doi: 10.1016/j.physletb.2014.10.021
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2014MO32      Phys.Rev. C 90, 041303 (2014)

K.Moran, E.A.McCutchan, C.J.Lister, S.Zhu, M.P.Carpenter, P.Chowdhury, J.P.Greene, T.Lauritsen, E.Merchan, R.Shearman

E5 decay from the Jπ = 11/2- isomer in 137Ba

RADIOACTIVITY 137Cs(β-); measured Eγ, Iγ, γγ-coin using Gammasphere array. 137Ba; deduced levels, new 378-keV E5 decay, branching ratio, B(E5). Relevance to ``two-photon" second-order electromagnetic decay. Systematics of B(E5) values throughout the nuclear chart.

doi: 10.1103/PhysRevC.90.041303
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2013AL19      Phys.Rev. C 88, 054314 (2013)

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

Single-particle and collective excitations in 63Ni

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

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

doi: 10.1103/PhysRevC.88.054314
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2013DO24      Nucl.Instrum.Methods Phys.Res. A728, 31 (2013)

N.D'Olympia, S.Lakshmi, P.Chowdhury, E.G.Jackson, J.Glodo, K.Shah

Sub-nanosecond nuclear half-life and time-of-flight measurements with CeBr3

RADIOACTIVITY 152Sm, 177Hf(IT); measured decay products, Eγ, Iγ; deduced isomer T1/2. Delayed coincidence technique.

doi: 10.1016/j.nima.2013.06.084
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2013DR01      Phys.Rev. C 87, 014326 (2013)

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

Three-quasiparticle isomers and possible deformation in the transitional nuclide, 195Au

NUCLEAR REACTIONS 192Os(136Xe, X), E AP 6.0 MeV/nucleon; measured Eγ, Iγ, γγ-coin, γγ(θ), γγ(t), T1/2 using Gammasphere at ATLAS facility in ANL. 195Au; deduced high-spin levels, isomers, J, π, total conversion coefficients, multipolarity, B(E1), B(M1), B(E2), B(M2), configurations, bands. Calculated potential energy surfaces, 3qp configurations and deformation parameters, residual interactions from semi-empirical shell model. Systematics of level structures in N=116 isotones 192Os, 193Ir, 194Pt, 195Au, 196Hg.

doi: 10.1103/PhysRevC.87.014326
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2013DR05      Phys.Lett. B 720, 330 (2013)

G.D.Dracoulis, G.J.Lane, A.P.Byrne, H.Watanabe, R.O.Hughes, F.G.Kondev, M.Carpenter, R.V.F.Janssens, T.Lauritsen, C.J.Lister, D.Seweryniak, S.Zhu, P.Chowdhury, Y.Shi, F.R.Xu

Isomers and excitation modes in the gamma-soft nucleus 192Os

NUCLEAR REACTIONS 192Os, 186W(136Xe, X)192Os, E=6 MeV/nucleon; measured reaction products, Eγ, Iγ, γ-γ-γ-coin.; deduced high-spin states, J, π, long-lived isomer; Comparison with potential-energy-surfaces calculations.

doi: 10.1016/j.physletb.2013.02.026
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2013HA02      Phys.Rev. C 87, 024315 (2013)

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

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

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

NUCLEAR STRUCTURE 164,166,168Lu, 166,168,170,172Ta, 170,172,174Re, 176Ir; calculated residual interactions. 163,165,167,169,171Lu, 165,167,169,171,173Ta, 169,171,173,175Re, 173,175,177Ir; calculated relative levels of πi13/2, πh9/2, πh11/2 bands.

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

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

Possible deformation evolution in the π i13/2 structure of 171Re

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

doi: 10.1103/PhysRevC.88.044323
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2013HU08      Phys.Rev. C 88, 014311 (2013)

R.O.Hughes, G.J.Lane, G.D.Dracoulis, A.P.Byrne, P.Nieminen, H.Watanabe, M.P.Carpenter, P.Chowdhury, R.V.F.Janssens, F.G.Kondev, T.Lauritsen, D.Seweryniak, S.Zhu

Multiquasiparticle states in the neutron-rich nucleus 174Tm

NUCLEAR REACTIONS 175,176Lu, 174,176Yb(136Xe, X), E=820 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ), isomer half-lives by γ(t) and γγ(t) using Gammasphere array at ATLAS-ANL facility. 174Tm; deduced levels, J, K, π, rotational bands, configurations, multipolarity, B(E1), B(M1), B(E2), B(M2), B(E3), hindrance factors for γ transitions, rotational alignments, magnitudes of gK-gR and mixing ratio, two- and four-quasiparticle states, residual n-n interaction. Comparison with multiquasiparticle calculations.

NUCLEAR STRUCTURE 174Tm; calculated levels, J, K, π, configurations. Multiquasiparticle pairing calculations use the Lipkin-Nogami formalism; comparison with experimental data.

doi: 10.1103/PhysRevC.88.014311
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2013NA31      Phys.Rev. C 88, 044335 (2013)

S.Nag, A.K.Singh, I.Ragnarsson, H.Hubel, A.Al-Khatib, P.Bringel, C.Engelhardt, A.Neusser-Neffgen, G.B.Hagemann, B.Herskind, G.Sletten, M.P.Carpenter, R.V.F.Janssens, T.L.Khoo, T.Lauritsen, R.M.Clark, P.Fallon, G.Benzoni, A.Bracco, F.Camera, P.Chowdhury

Collective and noncollective excitations in 122Te

NUCLEAR REACTIONS 82Se(48Ca, 4nα), E=200 MeV; measured Eγ, Iγ, γγ-coin, 3- and 4-fold γγ coincidences, γγ(θ)(ADO ratios) using Gammasphere array at ATLAS-ANL facility. 122Te; deduced high-spin levels, J, π, multipolarities, bands, configurations, alignments, dynamic moments of inertia; calculated total energy surface contours. Comparison with cranked Nilsson-Strutinsky model calculations. Systematics of band properties in 122Te, 125I, 125,126Xe, 132Ce.

doi: 10.1103/PhysRevC.88.044335
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2012DR02      Phys.Lett. B 709, 59 (2012)

G.D.Dracoulis, G.J.Lane, A.P.Byrne, H.Watanabe, R.O.Hughes, N.Palalani, F.G.Kondev, M.Carpenter, R.V.F.Janssens, T.Lauritsen, C.J.Lister, D.Seweryniak, S.Zhu, P.Chowdhury, Y.Shi, F.R.Xu

Long-lived three-quasiparticle isomers in 191Ir and 193Ir with triaxial deformation

NUCLEAR REACTIONS 186W, 187Re, 192Os(126Xe, X)191Ir/193Ir, E=6 MeV/nucleon; measured reaction products, X-rays, Eγ, Iγ, γ-γ-coin.; deduced high-spin state energies, J, π, transition strengths, total conversion coefficients, triaxial shape, extreme isomerism. Comparison with theoretical calculations.

doi: 10.1016/j.physletb.2012.02.008
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2012DR11      J.Phys.:Conf.Ser. 381, 012060 (2012)

G.D.Dracoulis, G.J.Lane, A.P.Byrne, H.Watanabe, R.O.Hughes, N.Palalani, F.G.Kondev, M.P.Carpenter, D.Seweryniak, S.Zhu, R.V.F.Janssens, C.J.Lister, T.Lauritsen, P.Chowdhury, Y.Shi, F.R.Xu

Isomers and alignments in 191Ir and 192Os

NUCLEAR REACTIONS 186W, 192Os(136Xe, X), E=6.0 MeV/nucleon; measured Eγ, Iγ, γγ-coin, X-rays using Gammasphere. 191Ir, 192Os deduced levels, J, π, γ transitions, rotational bands, deformation, high-spin states, isomeric states, T1/2, net alignments. Compared with published 194Pt, 196Hg.

doi: 10.1088/1742-6596/381/1/012060
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2012HU10      Phys.Rev. C 86, 054314 (2012)

R.O.Hughes, G.J.Lane, G.D.Dracoulis, A.P.Byrne, P.H.Nieminen, H.Watanabe, M.P.Carpenter, P.Chowdhury, R.V.F.Janssens, F.G.Kondev, T.Lauritsen, D.Seweryniak, S.Zhu

High-spin structure, K isomers, and state mixing in the neutron-rich isotopes 173Tm and 175Tm

NUCLEAR REACTIONS 174,176Yb, 175,176Lu(136Xe, X), E=820 MeV; measured Eγ, Iγ, γγ-coin, isomer half-lives by γγ(t) using Gammasphere array at ANL facility. 173,175Tm; deduced high-spin levels, isomers, J, π, bands, conversion coefficients, multipolarity, alignments, mixing ratios, gK-gR, B(EL), B(ML), hindrance factors, configurations. Comparison with multiquasiparticle calculations. Systematics of energies of multiquasiparticle states in N=104, 106 isotones 172,174Er, 173,175Tm, 174,176Yb, 175,177Lu. Mixing of high-K bands.

NUCLEAR STRUCTURE 173,175Tm; calculated levels, J, π, configurations. Multiquasiparticle calculations using single-particle energies from a Nilsson calculation and Lipkin-Nogami formalism for pairing correlations. Comparison with experimental data.

doi: 10.1103/PhysRevC.86.054314
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2012JE02      Phys.Rev. C 86, 064308 (2012)

D.G.Jenkins, C.J.Lister, M.P.Carpenter, P.Chowdhury, N.J.Hammond, R.V.F.Janssens, T.L.Khoo, T.Lauritsen, D.Seweryniak, T.Davinson, P.J.Woods, A.Jokinen, H.Penttila, F.Haas, S.Courtin

Candidate superdeformed band in 28Si

NUCLEAR REACTIONS 12C(20Ne, α), E=32 MeV; analyzed Eγ, Iγ, γγ-coin from Gammasphere data at ANL facility. 28Si; deduced levels, J, π, B(E2), SD band candidate with dominant 24Mg+α clustering.

doi: 10.1103/PhysRevC.86.064308
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2012KO07      Phys.Rev. C 85, 027304 (2012)

F.G.Kondev, S.Zhu, M.P.Carpenter, R.V.F.Janssens, I.Ahmad, C.J.Chiara, J.P.Greene, T.Lauritsen, D.Seweryniak, S.Lalkovski, P.Chowdhury

M3 and E4 K-forbidden decays of the Kπ=23/2- isomer in 177Lu

RADIOACTIVITY 177mLu(IT), (β-)[from 176Lu(n, γ), E=thermal]; measured Eγ, Iγ, γγ-coin using Gammasphere array. 177Lu, 177Hf; deduced levels, J, π, bands, B(E3), B(M3), B(E4), B(M4), B(E5), hindrance factors, configurations.

doi: 10.1103/PhysRevC.85.027304
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2012KO23      Appl.Radiat.Isot. 70, 1867 (2012)

F.G.Kondev, I.Ahmad, M.P.Carpenter, J.P.Greene, R.V.F.Janssens, T.Lauritsen, D.Seweryniak, S.Zhu, S.P.Lalkovski, P.Chowdhury

Gamma-ray emission probabilities in the decay of 177mLu

RADIOACTIVITY 177mLu(IT), (β-); measured decay products, Eγ, Iγ; deduced relative and absolute γ-ray emission probabilities. Comparison with available data.

doi: 10.1016/j.apradiso.2012.02.029
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2012ST06      Phys.Rev. C 85, 044316 (2012)

D.Steppenbeck, R.V.F.Janssens, S.J.Freeman, M.P.Carpenter, P.Chowdhury, A.N.Deacon, M.Honma, H.Jin, T.Lauritsen, C.J.Lister, J.Meng, J.Peng, D.Seweryniak, J.F.Smith, Y.Sun, S.L.Tabor, B.J.Varley, Y.-C.Yang, S.Q.Zhang, P.W.Zhao, S.Zhu

Magnetic rotation and quasicollective structures in 58Fe: Influence of the νγ9/2 orbital

NUCLEAR REACTIONS 48Ca(13C, 3n), (14C, 4n), E=130 MeV; measured Eγ, Iγ, γγ-coin, γ(θ), DCO ratios using Gammasphere array at ATLAS, ANL facility. 58Fe; deduced high-spin levels, J, π, multipolarity, bands, magnetic rotational bands, alignment plots, quasicollective structures, configurations. Comparison with shell model calculations, and with self-consistent tilted-axis-cranking calculations within relativistic mean-field theory.

NUCLEAR STRUCTURE 58Fe; calculated levels, J, π. Shell-model calculations in fp model space using GXPF1A, KB3G, and FPD6 interactions.

doi: 10.1103/PhysRevC.85.044316
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2012ZH22      Phys.Rev. C 85, 064307 (2012)

Y.C.Zhang, Q.A.Ijaz, W.C.Ma, G.B.Hagemann, M.P.Carpenter, P.Chowdhury, D.M.Cullen, M.K.Djongolov, D.J.Hartley, R.V.F.Janssens, T.L.Khoo, F.G.Kondev, T.Lauritsen, E.Ngiojoi-Yogo, S.Odegard, L.L.Riedinger, S.V.Rigby, D.G.Roux, D.T.Scholes, R.B.Yadav, S.Zhu

High-spin proton alignments and evidence for a second band with enhanced deformation in 171Hf

NUCLEAR REACTIONS 128Te(48Ca, 5n), E=209 MeV; measured Eγ, Iγ, γγ-coin, DCO ratios. 171Hf; deduced high-spin levels, J, π, rotational high-K and enhanced deformation bands, multipolarity, configurations, B(M1)/B(E2) ratios, alignments, band crossing frequencies. Comparison with cranked shell-model calculations.

doi: 10.1103/PhysRevC.85.064307
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2011AL02      Phys.Rev. C 83, 024306 (2011)

A.Al-Khatib, G.B.Hagemann, G.Sletten, A.K.Singh, H.Amro, G.Benzoni, A.Bracco, P.Bringel, F.Camera, M.P.Carpenter, P.Chowdhury, R.M.Clark, C.Engelhardt, P.Fallon, B.Herskind, H.Hubel, R.V.F.Janssens, T.L.Khoo, T.Lauritsen, A.Neusser-Neffgen, C.R.Hansen

High-spin spectroscopy in 125Xe

NUCLEAR REACTIONS 82Se(48Ca, 5n)125Xe, E=205 MeV; measured Eγ, Iγ, γγ-coin, DCO ratios, half-lives by DSAM using Gammasphere array. 125Xe; deduced levels, Jπ, rotational bands, multipolarities, highly-deformed bands, transition quadrupole moments from lifetime data, moment of inertia plots, configurations, alignments, band crossings. Calculated potential energy surfaces, Routhians using cranked shell model calculations (CSM).

doi: 10.1103/PhysRevC.83.024306
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2011CH06      Phys.Rev. C 83, 027601 (2011)

P.R.Chowdhury, G.Gangopadhyay, A.Bhattacharyya

Stability against α decay of some recently observed superheavy elements

RADIOACTIVITY 274Bh, 278Mt, 281Ds, 282Rg, 285Cn, 285,286Nh, 288,289Fl, 289,290Mc, 293,294Ts(α); calculated half-lives, quantum tunneling probabilities using DDM3Y effective interactions, RMF densities with NL3, TM1 and FSUGold forces. Comparison with measured half-lives.

doi: 10.1103/PhysRevC.83.027601
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2011HA25      Phys.Rev. C 83, 064307 (2011)

D.J.Hartley, R.V.F.Janssens, L.L.Riedinger, M.A.Riley, X.Wang, A.Aguilar, M.P.Carpenter, C.J.Chiara, P.Chowdhury, I.G.Darby, U.Garg, Q.A.Ijaz, F.G.Kondev, S.Lakshmi, T.Lauritsen, A.Ludington, W.C.Ma, E.A.McCutchan, S.Mukhopadhyay, R.Pifer, E.P.Seyfried, U.Shirwadkar, I.Stefanescu, S.K.Tandel, J.R.Vanhoy, S.Zhu, S.Frauendorf

Rotational structures and the wobbling mode in 167Ta

NUCLEAR REACTIONS 120Sn(51V, 4n), E=235 MeV; measured Eγ, Iγ, γγ-coin γγ(θ) using Gammasphere array. 167Ta; deduced levels, J, π, multipolarity, B(M1)/B(E2), rotational bands, alignments, band crossing frequencies, band configurations. Comparison with particle-rotor model calculations, and trends in the wobbling phonon energies in 161,163,165,167Lu, and 167Ta.

doi: 10.1103/PhysRevC.83.064307
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2011MU02      Phys.Rev. C 83, 044311 (2011)

S.Mukhopadhyay, W.C.Ma, R.V.F.Janssens, M.P.Carpenter, C.J.Chiara, P.Chowdhury, D.M.Cullen, G.B.Hagemann, D.J.Hartley, S.S.Hota, Q.A.Ijaz, T.L.Khoo, F.G.Kondev, S.Lakshmi, T.Lauritsen, J.Marsh, L.L.Riedinger, Y.Toh, R.B.Yadav, S.Zhu

Quadrupole moment measurements for strongly deformed bands in 171, 172Hf

NUCLEAR REACTIONS 128Te(48Ca, 4n), (48Ca, 5n), E=207 MeV; measured Eγ, Iγ, γγ-coin, DSAM using Gammasphere Spectrometer. 171,172Hf; deduced half-lives, transition quadrupole moments for enhanced deformation (ED) and triaxial strongly-deformed (TSD) bands, dynamic moment of inertia plots. Comparison of transition quadrupole moments of ED and TSD bands in 163Lu, 168,171,172,173,174,175Hf. Cranking calculations using Ultimate Cranker code.

doi: 10.1103/PhysRevC.83.044311
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2011RO20      Phys.Rev. C 83, 064311 (2011)

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

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

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

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

doi: 10.1103/PhysRevC.83.064311
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2011SI18      Phys.Rev. C 84, 024316 (2011)

P.Singh, S.Nag, A.K.Singh, I.Ragnarsson, H.Hubel, A.Al-Khatib, P.Bringel, C.Engelhardt, A.Neusser-Neffgen, G.B.Hagemann, C.R.Hansen, B.Herskind, G.Sletten, A.Bracco, G.Benzoni, F.Camera, P.Fallon, R.M.Clark, M.P.Carpenter, R.V.F.Janssens, T.L.Khoo, T.Lauritsen, P.Chowdhury, H.Amro

Highly deformed high-spin band in 125I

NUCLEAR REACTIONS 82Se(48Ca, 4np), E=200 MeV; measured Eγ, Iγ, γγ- coin using Gammasphere array. 125I; deduced levels, J, π, highly-deformed bands, multipolarity, configurations, alignments, dynamic moments of inertia. 125I, 126Xe; calculated potential energy surfaces, Routhians using cranked Nilsson-Strutinsky formalism.

doi: 10.1103/PhysRevC.84.024316
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2010AG06      Phys.Rev. C 81, 064317 (2010)

A.Aguilar, D.J.Hartley, M.A.Riley, C.Teal, M.P.Carpenter, P.Chowdhury, M.Danchev, M.K.Djongolov, G.B.Hagemann, A.A.Hecht, R.V.F.Janssens, F.G.Kondev, T.Lauritsen, W.C.Ma, W.H.Mohr, E.F.Moore, S.W.Odegard, L.L.Riedinger, G.Sletten, S.K.Tandel, J.R.Vanhoy, X.Wang, S.Zhu

Alignments, additivity, and signature inversion in odd-odd 170Ta: A comprehensive high-spin study

NUCLEAR REACTIONS 124Sn(51V, 5n), E=228 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ) using Gammasphere array. 170Ta; deduced levels, J, π, rotational bands, configurations, Routhians, signature inversions, B(M1)/B(E2) ratios.

doi: 10.1103/PhysRevC.81.064317
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2010CH20      Phys.Rev. C 81, 062801 (2010)

P.R.Chowdhury, A.Bhattacharyya, D.N.Basu

Isospin asymmetric nuclear matter and properties of axisymmetric neutron stars

doi: 10.1103/PhysRevC.81.062801
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2010DR01      Phys.Rev. C 81, 011301 (2010)

G.D.Dracoulis, F.G.Kondev, G.J.Lane, A.P.Byrne, M.P.Carpenter, R.V.F.Janssens, T.Lauritsen, C.J.Lister, D.Seweryniak, P.Chowdhury

Connections between high-K and low-K states in the s-process nucleus 176Lu

NUCLEAR REACTIONS 176Lu(136Xe, 136Xe'γ), E=6.0 MeV/nucleon; measured Eγ, Iγ, γγ-coin using the Gammasphere array. Beam-on and beam-off measurements. 176Lu; deduced levels, J, π, multipolarity, transition strengths, partial γ-ray widths, connection between high-K and low-K bands, and astrophysical significance for the s-process nucleus.

doi: 10.1103/PhysRevC.81.011301
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2010DR05      Phys.Rev. C 82, 034317 (2010)

G.D.Dracoulis, G.J.Lane, R.O.Hughes, F.G.Kondev, H.Watanabe, D.Seweryniak, S.Zhu, M.P.Carpenter, C.J.Chiara, R.V.F.Janssens, T.Lauritsen, C.J.Lister, E.A.McCutchan, I.Stefanescu, P.Chowdhury

Structure of three-quasiparticle isomers in 169Ho and 171Tm

NUCLEAR REACTIONS 170Er(136Xe, X), E=830 MeV; measured Eγ, Iγ, γγ-coin, delayed spectra, half-lives and branching ratios using Gammasphere array. 169Ho, 171Tm; deduced levels, J, π, isomer, transition strengths and hindrances, gK-gR values, bands and quasiparticle configurations.

doi: 10.1103/PhysRevC.82.034317
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2010HA26      Phys.Rev. C 82, 057302 (2010)

D.J.Hartley, R.V.F.Janssens, L.L.Riedinger, M.A.Riley, X.Wang, A.Aguilar, M.P.Carpenter, C.J.Chiara, P.Chowdhury, I.G.Darby, U.Garg, Q.A.Ijaz, F.G.Kondev, S.Lakshmi, T.Lauritsen, W.C.Ma, E.A.McCutchan, S.Mukhopadhyay, E.P.Seyfried, U.Shirwadkar, I.Stefanescu, S.K.Tandel, J.R.Vanhoy, S.Zhu

Band crossings in 166Ta

NUCLEAR REACTIONS 120Sn(51V, 5n), E=235 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ) using Gammasphere array. 166Ta; deduced levels, J, π, rotational bands, alignments and B(M1)/B(E2) ratios. Comparison of alignments with those in 165Hf bands. Comparison with theoretical B(M1)/B(E2) ratios.

doi: 10.1103/PhysRevC.82.057302
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2010LA16      Phys.Rev. C 82, 051304 (2010)

G.J.Lane, G.D.Dracoulis, F.G.Kondev, R.O.Hughes, H.Watanabe, A.P.Byrne, M.P.Carpenter, C.J.Chiara, P.Chowdhury, R.V.F.Janssens, T.Lauritsen, C.J.Lister, E.A.McCutchan, D.Seweryniak, I.Stefanescu, S.Zhu

Structure of neutron-rich tungsten nuclei and evidence for a 10- isomer in 190W

NUCLEAR REACTIONS 186W, 192Os(136Xe, X), E=840 MeV pulsed beam; measured Eγ, Iγ, prompt and delayed γ spectra, γγ-coin, γγ(t), half-lives. 188W, 190W; deduced levels, J, π, isomers, internal conversion coefficients, multipolarity, configurations, transition strengths, K-hindrances. 186,188,190W; systematics of calculated two-particle states.

doi: 10.1103/PhysRevC.82.051304
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2010MU13      Phys.Rev. C 82, 054316 (2010)

G.Mukherjee, P.Chowdhury, F.G.Kondev, P.M.Walker, G.D.Dracoulis, R.D'Alarcao, I.Shestakova, K.Abu Saleem, I.Ahmad, M.P.Carpenter, A.Heinz, R.V.F.Janssens, T.L.Khoo, T.Lauritsen, C.J.Lister, D.Seweryniak, I.Wiedenhoever, D.M.Cullen, C.Wheldon, D.L.Balabanski, M.Danchev, T.M.Goon, D.J.Hartley, L.L.Riedinger, O.Zeidan, M.A.Riley, R.A.Kaye, G.Sletten

K-hindered decay of a six-quasiparticle isomer in 176Hf

NUCLEAR REACTIONS 130Te(48Ca, 2n), E=194 MeV; measured Eγ, Iγ, γγ-coin, half-lives using Gammasphere array. Beam-on, beam-off measurements of γ spectra. 176Hf; deduced levels, J, π, rotational bands, isomers, multipolarity, configurations, reduced hindrance factors for K-isomers.

doi: 10.1103/PhysRevC.82.054316
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2010SE10      Nucl.Phys. A834, 357c (2010)

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

Bridging the nuclear structure gap between stable and super heavy nuclei

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

doi: 10.1016/j.nuclphysa.2010.01.039
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2010SI21      Phys.Rev. C 82, 034301 (2010)

P.Singh, S.Nag, A.K.Singh, H.Hubel, A.Al-Khatib, P.Bringel, C.Engelhardt, A.Neusser-Neffgen, I.Ragnarsson, M.P.Carpenter, R.V.F.Janssens, T.L.Khoo, T.Lauritsen, G.B.Hagemann, C.R.Hansen, B.Herskind, G.Sletten, A.Bracco, G.Benzoni, F.Camera, P.Fallon, R.M.Clark, P.Chowdhury, H.Amro

Noncollective aligned and antialigned states in 125I

NUCLEAR REACTIONS 82Se(48Ca, 4np), E=205 MeV; measured Eγ, Iγ, γγ-coin, γ(θ) ratios using Gammasphere array. 125I; deduced levels, J, π, bands, highly-deformed bands, multipolarities, and configurations. Comparison with cranked Nilsson-Strutinsky (CNS) calculations.

NUCLEAR STRUCTURE 125I; calculated levels and total energy surfaces.

doi: 10.1103/PhysRevC.82.034301
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2010ST01      Phys.Rev. C 81, 014305 (2010); Erratum Phys.Rev. C 82, 069903 (2010)

D.Steppenbeck, A.N.Deacon, S.J.Freeman, R.V.F.Janssens, S.Zhu, M.P.Carpenter, P.Chowdhury, M.Honma, T.Lauritsen, C.J.Lister, D.Seweryniak, J.F.Smith, S.L.Tabor, B.J.Varley

High-spin structures in the neutron-rich isotopes 57-60Mn

NUCLEAR REACTIONS 13,14C(48Ca, X), E=130 MeV; measured Eγ, Iγ, γγ-coin using the Gammasphere array, γ(θ), DCO ratios. 57,58,59,60Mn; deduced levels, J, π, multipolarities. Comparison with shell-model calculations using the GXPF1A effective interaction.

doi: 10.1103/PhysRevC.81.014305
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2010TA22      Phys.Rev. C 82, 041301 (2010)

S.K.Tandel, P.Chowdhury, S.Lakshmi, U.S.Tandel, I.Ahmad, M.P.Carpenter, S.Gros, R.V.F.Janssens, T.L.Khoo, F.G.Kondev, J.P.Greene, D.J.Hartley, T.Lauritsen, C.J.Lister, D.Peterson, A.Robinson, D.Seweryniak, S.Zhu

Rotational bands in odd-A Cm and Cf isotopes: Exploring the highest neutron orbitals

NUCLEAR REACTIONS 248Cm(209Bi, 210Bi)247Cm, E=1450 MeV; 250Cm(209Bi, 208Bi)249Cm, E=1450 MeV; 249Cf(207Pb, 207Pb'), E=1430 MeV; measured Eγ, Iγ, γγ-coin using Gammasphere array. 247,249Cm, 249Cf; deduced levels, J, π, (gK-gR)/Q0, alignments, Nilsson configurations, and rotational bands. 197Au, 207Pb, 208Bi, 210Bi; measured Eγ. Systematics of alignments for 244Pu, 246Cm, 248Cf, 250Fm and 252No, Comparison with Woods-Saxon cranking calculations.

doi: 10.1103/PhysRevC.82.041301
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2010WA36      Phys.Rev. C 82, 034315 (2010)

X.Wang, D.J.Hartley, M.A.Riley, L.L.Riedinger, A.Aguilar, M.P.Carpenter, C.J.Chiara, P.Chowdhury, I.Darby, U.Garg, Q.Ijaz, R.V.F.Janssens, F.G.Kondev, S.Lakshmi, T.Lauritsen, W.C.Ma, E.A.McCutchan, S.Mukhopadhyay, E.P.Seyfried, I.Stefanescu, S.K.Tandel, U.S.Tandel, C.Teal, J.R.Vanhoy, S.Zhu

Multi-quasiparticle structures up to spin ∼ 44h in the odd-odd nucleus 168Ta

NUCLEAR REACTIONS 120Sn(51V, 3n), E=235 MeV; measured Eγ, Iγ, γγ-coin using Gammasphere array. 168Ta, deduced levels, J, π, B(M1)/B(E2) values, energy staggerings of signature partners, alignments, two-quasiparticle bands, configurations. Comparisons with cranked shell model calculations, and with band structures of 162,164,166Tm, 164,166,169Lu, 167Hf and 166,167,170Ta.

doi: 10.1103/PhysRevC.82.034315
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2009HA33      Phys.Rev. C 80, 041304 (2009); Publishers Note, Phys.Rev. C 80, 059901 (2009)

D.J.Hartley, R.V.F.Janssens, L.L.Riedinger, M.A.Riley, A.Aguilar, M.P.Carpenter, C.J.Chiara, P.Chowdhury, I.G.Darby, U.Garg, Q.A.Ijaz, F.G.Kondev, S.Lakshmi, T.Lauritsen, A.Ludington, W.C.Ma, E.A.McCutchan, S.Mukhopadhyay, R.Pifer, E.P.Seyfried, I.Stefanescu, S.K.Tandel, U.Tandel, J.R.Vanhoy, X.Wang, S.Zhu, I.Hamamoto, S.Frauendorf

Wobbling mode in 167Ta

NUCLEAR REACTIONS 120Sn(51V, 4n), E=235 MeV; measured Eγ, Iγ, γγ-coin and γγ(θ) using Gammasphere array. 167Ta; deduced levels, J, π, triaxial superdeformed bands, normal deformed bands, dynamic moments of inertia, alignments and rotational frequency. Comparison with ultimate cranked (UC) calculations.

doi: 10.1103/PhysRevC.80.041304
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2009KO19      Phys.Rev. C 80, 014304 (2009)

F.G.Kondev, G.D.Dracoulis, G.J.Lane, I.Ahmad, A.P.Byrne, M.P.Carpenter, P.Chowdhury, R.V.F.Janssens, T.Kibedi, T.Lauritsen, C.J.Lister, D.Seweryniak, S.K.Tandel, S.Zhu

Multi-quasiparticle isomers in 174Lu

NUCLEAR REACTIONS Lu, 176Lu(136Xe, X), E ≈ 20% above Coulomb barrier; measured Eγ, Iγ, γγ-coin and half-lives. 174Lu; deduced levels, J, π, isomers, conversion coefficients, multipolarity, transition probabilities, configurations, hindrance factors, rotational bands, band alignments and multi-quasiparticle intrinsic states.

doi: 10.1103/PhysRevC.80.014304
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2009LA17      Phys.Rev. C 80, 024321 (2009)

G.J.Lane, G.D.Dracoulis, A.P.Byrne, R.O.Hughes, H.Watanabe, F.G.Kondev, C.J.Chiara, M.P.Carpenter, R.V.F.Janssens, T.Lauritsen, C.J.Lister, E.A.McCutchan, D.Seweryniak, S.Zhu, P.Chowdhury, I.Stefanescu

Decay of a Kπ = 21/2-, 17-ms isomer in 185Ta

NUCLEAR REACTIONS 186W(136Xe, X)185Ta, E=840 MeV; measured Eγ, Iγ, γγ-coin and half-lives. 185Ta; deduced levels, J, π, isomer, mixing ratios, bands and configurations, transition rates and other rotational-model characteristics, K-allowed E1 and K-forbidden transitions.

doi: 10.1103/PhysRevC.80.024321
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2009WA02      Phys.Rev. C 79, 024306 (2009)

H.Watanabe, G.J.Lane, G.D.Dracoulis, T.Kibedi, A.P.Byrne, P.Nieminen, R.O.Hughes, F.G.Kondev, M.P.Carpenter, R.V.F.Janssens, T.Lauritsen, D.Seweryniak, S.Zhu, P.Chowdhury, C.-B.Moon

Decay properties of high-spin isomers and other structures in 121Sb and 123Sb

NUCLEAR REACTIONS Yb, Lu, W, Os(136Xe, X)121Sb/123Sb, E=6.0-6.2 MeV/nucleon; measured Eγ, γγ-coin, γ(t), half-lives; deduced isomers. 120Sn(7Li, 2nα), E=58 MeV; 122Sn(7Li, 2nα), E=54 MeV; measured Eγ, Iγ, γγ-coin, coversion electron spectra, half-lives by decay curve analyses and centroid-shift methods, angular correlations, DCO, conversion coefficients. 121,123Sb; deduced levels, J, π, multipolarity, mixing ratios, configurations. Comparisons with 120Sn and 122Sn and with multistate mixing calculations. 113,115,117,119,121,123,125,127,129,131,133Sb; systematics.

doi: 10.1103/PhysRevC.79.024306
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2009WA11      Phys.Rev. C 79, 064311 (2009)

H.Watanabe, G.J.Lane, G.D.Dracoulis, A.P.Byrne, P.Nieminen, F.G.Kondev, K.Ogawa, M.P.Carpenter, R.V.F.Janssens, T.Lauritsen, D.Seweryniak, S.Zhu, P.Chowdhury

Multi-quasiparticle isomers involving proton-particle and neutron-hole configurations in 131I and 133I

NUCLEAR REACTIONS 176Yb, 176Lu, 186W, 192Os(136Xe, X)131I/133I, E=820-840 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ), and isomer half-lives. 131,133I; deduced levels, J, π, mixing ratios, conversion coefficients, and multipolarities. Z=50-53, N=78-80; systematics of B(E2) rates for isomer decays. Comparison with shell-model calculations.

doi: 10.1103/PhysRevC.79.064311
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2009WA24      Eur.Phys.J. A 42, 163 (2009)

H.Watanabe, G.J.Lane, G.D.Dracoulis, A.P.Byrne, P.Nieminen, F.G.Kondev, K.Ogawa, M.P.Carpenter, R.V.F.Janssens, T.Lauritsen, D.Seweryniak, S.Zhu, P.Chowdhury

Identification of Jπ = 19/2+ and 23/2+ isomeric states in 127Sb

NUCLEAR REACTIONS 176Yb, 176Lu, 186W(136Xe, X)127Sb, E=6.0-6.2 MeV/nucleon; measured Eγ, Iγ, γγ-coin, γ(θ), γ(t), T1/2 using Gammasphere array. 127Sb; deduced levels, J, π, T1/2, δ, B(E2), B(E3), B(M2), internal conversion coefficients. Comparison with shell model and systematics for adjacent isotopes.

doi: 10.1140/epja/i2009-10881-7
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2008AL12      Eur.Phys.J. A 36, 21 (2008)

A.Al-Khatib, H.Hubel, P.Bringel, C.Engelhardt, A.Neusser-Neffgen, G.B.Hagemann, C.R.Hansen, B.Herskind, G.Sletten, A.Bracco, F.Camera, G.Benzoni, P.Fallon, R.M.Clark, M.P.Carpenter, R.V.F.Janssens, T.L.Khoo, T.Lauritsen, P.Chowdhury, H.Amro, A.K.Singh, R.Bengtsson

Transition to non-collective states at high spin in 124Xe

NUCLEAR REACTIONS 82Se(48Ca, 6n), E=205 MeV; measured Eγ, Iγ, γγ-coin using Gammasphere. 124Xe deduced levels, J, π.

doi: 10.1140/epja/i2008-10570-1
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2008GR17      Phys.Rev. C 78, 021303 (2008)

P.T.Greenlees, R.-D.Herzberg, S.Ketelhut, P.A.Butler, P.Chowdhury, T.Grahn, C.Gray-Jones, G.D.Jones, P.Jones, R.Julin, S.Juutinen, T.-L.Khoo, M.Leino, S.Moon, M.Nyman, J.Pakarinen, P.Rahkila, D.Rostron, J.Saren, C.Scholey, J.Sorri, S.K.Tandel, J.Uusitalo, M.Venhart

High-K structure in 250Fm and the deformed shell gaps at N=152 and Z=100

NUCLEAR REACTIONS 204Hg(48Ca, 2n), E=209 MeV; measured Eγ, Iγ, conversion electrons, (ce)γ-coin. 250Fm; deduced levels, J, π, band configurations, B(M1), B(E2). 252,254No; systematics

RADIOACTIVITY 250Fm(IT); measured Eγ, Iγ, half-life. Deduced levels, J, π. Comparison with model calculations.

doi: 10.1103/PhysRevC.78.021303
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2008JO03      Phys.Rev. C 77, 034311 (2008)

G.A.Jones, S.J.Williams, P.M.Walker, Zs.Podolyak, S.Zhu, M.P.Carpenter, J.J.Carroll, R.S.Chakrawarthy, P.Chowdhury, I.J.Cullen, G.D.Dracoulis, A.B.Garnsworthy, G.Hackman, R.V.F.Janssens, T.L.Khoo, F.G.Kondev, G.J.Lane, Z.Liu, D.Seweryniak, N.J.Thompson

High-spin, multiparticle isomers in 121, 123Sb

NUCLEAR REACTIONS 27Al(178Hf, X)121Sb/123Sb, E=1150 MeV; measured Eγ, Iγ, half-lives of isomers, internal conversion coefficients; deduced multipolarities, mixing ratios, γγ(θ). 121,123Sb; deduced levels, J, π. 120,122Sn, 117,119,125,126,127,128,129,130,131Sb; systematics.

doi: 10.1103/PhysRevC.77.034311
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2008RO21      Phys.Rev. C 78, 034308 (2008)

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

Kπ = 8- isomers and Kπ = 2- octupole vibrations in N = 150 shell-stabilized isotones

NUCLEAR REACTIONS 206Pb(48Ca, 2n), E=217 MeV; measured Eγ, Iγ, conversion electron spectra, γγ-, (ce)γ-coin, half-life. 252No; deduced levels, J, π. 244Pu, 248Cf, 250Fm; systematics of 2- and 8- states.

RADIOACTIVITY 246Am(β-) [from 244Pu(α, pn), E=42 MeV]; measured Eγ, Iγ, conversion electron spectra, γγ-, (ce)γ-spectra, isomer half-life. 246Cm; deduced levels, J, π.

doi: 10.1103/PhysRevC.78.034308
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2008TA03      Phys.Rev. C 77, 024313 (2008)

S.K.Tandel, A.J.Knox, C.Parnell-Lampen, U.S.Tandel, P.Chowdhury, M.P.Carpenter, R.V.F.Janssens, T.L.Khoo, T.Lauritsen, C.J.Lister, D.Seweryniak, X.Wang, S.Zhu, D.J.Hartley, J.-ye.Zhang

Search for strongly deformed structures and observation of multiple nucleon alignments in 174W

NUCLEAR REACTIONS 128Te(50Ti, 4n), E=230 MeV; measured Eγ, Iγ, γγ-coin; 174W; deduced levels, J, π, band alignments, searched for triaxial strongly deformed bands. 163,164,165,167Lu, 174,175Hf; analyzed energy spacings.

doi: 10.1103/PhysRevC.77.024313
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2008TA28      Phys.Rev.Lett. 101, 182503 (2008)

U.S.Tandel, S.K.Tandel, P.Chowdhury, D.Cline, C.Y.Wu, M.P.Carpenter, R.V.F.Janssens, T.L.Khoo, T.Lauritsen, C.J.Lister, D.Seweryniak, S.Zhu

Collective Oblate Rotation at High Spins in Neutron-Rich 180Hf

NUCLEAR REACTIONS 232Th(180Hf, 180Hf'), E=1300 MeV; measured Eγ, Iγ, γγ-coin. 180Hf; deduced levels, J, π.

doi: 10.1103/PhysRevLett.101.182503
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2007AL37      Acta Phys.Pol. B38, 1431 (2007)

A.Al-Khatib, H.Hubel, P.Bringel, C.Engelhardt, A.Neusser-Neffgen, G.B.Hagemann, C.R.Hansen, B.Herskind, G.Sletten, A.Bracco, F.Camera, G.Benzoni, P.Fallon, R.M.Clark, M.P.Carpenter, R.V.F.Janssens, T.L.Khoo, P.Chowdhury, H.Amro

High-Spin Spectroscopy of 124, 125, 126Xe

NUCLEAR REACTIONS 82Se(48Ca, X), E=205 MeV; measured Eγ, Iγ, γγ-coinc using Gammasphere. 124,125,126Xe deduced levels, J, π.

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2007BR09      Phys.Rev. C 75, 044306 (2007)

P.Bringel, C.Engelhardt, H.Hubel, A.Neusser-Neffgen, S.W.Odegard, G.B.Hagemann, C.R.Hansen, B.Herskind, G.Sletten, M.P.Carpenter, R.V.F.Janssens, T.L.Khoo, T.Lauritsen, D.Seweryniak, W.C.Ma, D.G.Roux, P.Chowdhury

Evidence for octupole vibration in the triaxial superdeformed well of 164Lu

NUCLEAR REACTIONS 121Sb(48Ca, 5n), E=215 MeV; measured Eγ, Iγ, γγ-coin. 164Lu deduced high-spin levels, J, π, triaxial superdeformed bands, octupole vibration. Gammasphere array.

doi: 10.1103/PhysRevC.75.044306
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2007CH36      Phys.Rev. C 75, 047306 (2007)

P.R.Chowdhury, D.N.Basu, C.Samanta

α decay chains from element 113

RADIOACTIVITY 278,283,284Nh, 274,279,280Rg, 270,275,276Mt, 266,272Bh(α); calculated T1/2. Density-dependent effective nucleon-nucleon interaction.

doi: 10.1103/PhysRevC.75.047306
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2007DE56      Phys.Rev. C 76, 054303 (2007)

A.N.Deacon, S.J.Freeman, R.V.F.Janssens, M.Honma, M.P.Carpenter, P.Chowdhury, T.Lauritsen, C.J.Lister, D.Seweryniak, J.F.Smith, S.L.Tabor, B.J.Varley, F.R.Xu, S.Zhu

Yrast structures in the neutron-rich isotopes 59, 60Fe and the role of the g9/2 orbital

NUCLEAR REACTIONS 13,14C(48Ca, 2n), E=2.75 MeV/nucleon; measured Eγ, Iγ, γγ-coin, γ(θ), symmetry parameters. 59,60Fe; deduced angular momenta, levels, J, π; calculated potential energy surfaces. Shell model calculations.

doi: 10.1103/PhysRevC.76.054303
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2007JE08      Phys.Rev. C 76, 044310 (2007)

D.G.Jenkins, B.R.Fulton, P.Marley, S.P.Fox, R.Glover, R.Wadsworth, D.L.Watson, S.Courtin, F.Haas, D.Lebhertz, C.Beck, P.Papka, M.Rousseau, A.Sanchez i Zafra, D.A.Hutcheon, C.Davis, D.Ottewell, M.M.Pavan, J.Pearson, C.Ruiz, G.Ruprecht, J.Slater, M.Trinczek, J.D'Auria, C.J.Lister, P.Chowdhury, C.Andreoiu, J.J.Valiente-Dobon, S.Moon

Decay strength distributions in 12C(12C, γ) radiative capture

NUCLEAR REACTIONS 12C(12C, γ), E(cm)=6.0, 6.8, 7.5, 8.0 MeV; measured Eγ, Iγ, γγ, (recoil)γ-coin; deduced multipolarities, on and off resonances. TRIUMF-ISAC DRAGON recoil spectrometer, GEANT3 array.

doi: 10.1103/PhysRevC.76.044310
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2007JO13      Phys.Rev. C 76, 047303 (2007)

G.A.Jones, P.H.Regan, P.M.Walker, Zs.Podolyak, P.D.Stevenson, M.P.Carpenter, J.J.Carroll, R.S.Chakrawarthy, P.Chowdhury, A.B.Garnsworthy, R.V.F.Janssens, T.L.Khoo, F.G.Kondev, G.J.Lane, Z.Liu, D.Seweryniak, N.J.Thompson, S.Zhu, S.J.Williams

Identification of a high-spin isomer in 99Mo

NUCLEAR REACTIONS 27Al(178Hf, X), E=1150 MeV; measured Eγ, Iγ, γγ-coin. 99Mo deduced levels, J, π, half-life, isomer, band structure.

doi: 10.1103/PhysRevC.76.047303
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2007LA20      Phys.Rev. C 75, 064309 (2007)

T.Lauritsen, R.V.F.Janssens, T.L.Khoo, I.Ahmad, M.P.Carpenter, F.G.Kondev, C.J.Lister, E.F.Moore, D.Seweryniak, S.Zhu, T.Dossing, B.Herskind, A.Korichi, A.Lopez-Martens, R.M.Clark, P.Fallon, G.Lane, A.O.Macchiavelli, D.Ward, A.M.Heinz, D.G.Jenkins, A.J.Larabee, B.Meredith, J.Kozemczak, P.Chowdhury

Rotational damping, ridges, and the quasicontinuum of γ rays in 152Dy

NUCLEAR REACTIONS 108Pd(48Ca, 4n)152Dy, E=191 MeV; measured Eγ, Iγ, γγ-coinc. Analyzed quasicontinuum and ridge spectra and feeding intensity of the superdeformed bands.

doi: 10.1103/PhysRevC.75.064309
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2007NA27      Phys.Rev. C 76, 054604 (2007)

R.S.Naik, W.Loveland, P.H.Sprunger, A.M.Vinodkumar, D.Peterson, C.L.Jiang, S.Zhu, X.Tang, E.F.Moore, P.Chowdhury

Measurement of the fusion probability PCN for the reaction of 50Ti with 208Pb

NUCLEAR REACTIONS 208Pb(50Ti, X), E(cm)=183.7, 186.2, 190.2, 194.2, 202.3 MeV; measured fission fragments, cross sections, angular distributions; deduced fusion probabilities and survival probabilities for compound nuclei Z=102-113.

doi: 10.1103/PhysRevC.76.054604
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