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NSR database version of May 24, 2024.

Search: Author = S.K.Tandel

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2023KU21      Phys.Rev. C 108, 044313 (2023)

V.Kumar, R.Chapman, D.O'Donnell, J.Ollier, R.Orlandi, J.F.Smith, K.-M.Spohr, D.A.Torres, P.Wady, S.K.Tandel, S.J.Freeman, G.de Angelis, N.Marginean, D.R.Napoli, J.J.Valiente-Dobon, S.Aydin, E.Farnea, R.Marginean, D.Mengoni, T.Kroll, N.Thompson

Evolution of nuclear structure in the neutron-rich 96, 97, 99Nb isotopes: Evidence for shape coexistence in N = 58 99Nb

doi: 10.1103/PhysRevC.108.044313
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2023MA32      Phys.Rev. C 108, 014309 (2023)

Madhu, A.Y.Deo, K.Yadav, D.Sahoo, Y.Y.Wang, Y.K.Wang, J.Meng, S.Suman, S.K.Tandel, A.Sharma, I.Ahmed, K.Katre, K.Rojeeta Devi, S.Dutt, S.Kumar, Yashraj, S.Muralithar, R.P.Singh

Coexisting single-particle excitations and octupole correlations in the transitional nucleus 217Ra

NUCLEAR STRUCTURE 208Pb(12C, 3n)217Ra, E=68, 72, 80 MeV; measured Eγ, Iγ, X-rays, γγ-coin, γγ(θ). 217Ra; deduced levels, J, π δ, high-spin states, ratios of directional correlations of oriented states (DCO ratios), transition polarization asymmetry, linear polarization, cumulative T1/2 of the 2301- and 2394-keV states, configurations, bands structure and energy splittings. Comparison to theoretical calculations using reflection-asymmetric triaxial particle rotor model (RAT-PRM). From features of the simplex bands suggested that 217Ra exhibits an intermediate behavior between the extremes of spherical and octupole-deformed nuclei. Systematics of energy splittings and B(E1)/B(E2) ratios for 216Fr, 217Ra, 218Ac, 219Th, 232Th. Indian National Gamma Array (INGA) comprising of 13 Compton suppressed clover detectors and one low-energy photon spectrometer (LEPS) at 15UD Pelletron accelerator of Inter-University Accelerator Centre (New Delhi).

doi: 10.1103/PhysRevC.108.014309
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2023YA12      Phys.Rev. C 107, 054303 (2023)

K.Yadav, A.Y.Deo, Madhu, D.Sahoo, P.C.Srivastava, S.Suman, S.K.Tandel, A.Sharma, I.Ahmed, K.Katre, K.Rojeeta Devi, S.Dutt, S.Kumar, Yashraj, S.Muralithar, R.P.Singh

High-spin spectroscopy in 207At: Evidence of a 29/2+ isomeric state

NUCLEAR REACTIONS 198Pt(14N, 5n)207At, E=80-87 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ)(DCO), γγ(linear polarization) using INGA array of 13 Compton-suppressed HPGe detectors at the 15-UD tandem accelerator of the IUAC-New Delhi facility. Deduced high-spin levels, J, π, bands, multipolarities, new high-spin isomer, and configurations. Comparison with large-scale shell model calculations using KHM3Y effective interaction. Systematics of energies low-lying states in 116,118,120,122,126At and 116,118,120,122,126Po, and B(E3) in At isotopes. Systematics of energies of 13/2+ states in 199,201,203,205,207At.

doi: 10.1103/PhysRevC.107.054303
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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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2022MA16      Phys.Rev. C 105, 034308 (2022)

Madhu, K.Yadav, A.Y.Deo, Pragati, P.C.Srivastava, S.K.Tandel, S.G.Wahid, S.Kumar, S.Muralithar, R.P.Singh, I.Bala, S.S.Bhattacharjee, R.Garg, S.Chakraborty, S.Rai, A.K.Jain

Evolution of nuclear structure through isomerism in 216Fr

NUCLEAR REACTIONS 208Pb(11B, 3n), E=54-62 MeV; measured Eγ, Iγ, γ(θ), γγ-coin. 216Fr; deduced high-spin isomers, J, π, T1/2 of isomeric states, γ-ray branching ratios, B(E1), B(M2), single-particle transition rates, configurations. Half-lives extracted using centroid-shift and decay-curve analyses. Systematics of the 11+ isomers properties in the 216Fr, 212At, 218Ac. Comparison to the shell-model calculations. Beam from 15 UD Pelletron accelerator at Inter-University Accelerator Centre (IUAC). Detector system - Indian National Gamma Array (INGA) with 14 Compton suppressed clover HPGe.

doi: 10.1103/PhysRevC.105.034308
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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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2022YA10      Phys.Rev. C 105, 034307 (2022)

K.Yadav, A.Y.Deo, Madhu, Pragati, P.C.Srivastava, S.K.Tandel, S.G.Wahid, S.Kumar, S.Muralithar, R.P.Singh, I.Bala, S.S.Bhattacharjee, R.Garg, S.Chakraborty, S.Rai, A.K.Jain

Level structure in the transitional nucleus 215Fr

NUCLEAR REACTIONS 208Pb(11B, 4n), E=54-62 MeV; measured Eγ, Iγ, γ(θ), γγ-coin, γγγ-coin. 215Fr; deduced levels, high-spin states, J, π, δ, DCO-ratios, γ-ray multipolarities, polarization, T1/2 of the excited states, configurations; calculated levels, J, π, B(E2), B(M1), B(E3), δ. Large scale shell model calculations with CD-Bonn NN potential. Discussed possible structure of yrast and near-yrast lines. Beam from 15 UD Pelletron accelerator at Inter-University Accelerator Centre (IUAC). Detector system - Indian National Gamma Array (INGA) with 14 Compton suppressed clover HPGe.

doi: 10.1103/PhysRevC.105.034307
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2021DE11      Eur.Phys.J. A 57, 126 (2021)

A.Y.Deo, K.Yadav, Madhu, S.K.Tandel, R.Kumar

Antimagnetic rotation and role of gradual neutron alignment in 103Pd

NUCLEAR REACTIONS 80Se(30Si, 3nα)103Pd, E=120 MeV; measured reaction products, Eγ, Iγ; deduced γ-ray energies and intensities, lifetimes, B(E2), negative-parity band. Doppler-Shift Attenuation Method, comparison with semiclassical particle-rotor model approach calculations.

doi: 10.1140/epja/s10050-021-00453-4
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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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2020MU08      Nucl.Phys. A1000, 121785 (2020)

S.Mukhopadhyay, D.C.Biswas, L.S.Danu, R.Chakrabarti, U.Garg, S.K.Tandel, Y.K.Gupta, B.N.Joshi, G.K.Prajapati, B.V.John, S.Saha, J.Sethi, R.Palit

Lifetime measurement and shell model description of negative parity states up to band-termination in 49V

NUCLEAR REACTIONS 27Al(28Si, 2pα), E=100 MeV; measured reaction products, Eγ, Iγ, γ-γ-coin.; deduced γ-ray energies and relative intensities, partial level scheme, level lifetimes, B(E2), yrast and the yrare negative-parity states. Comparison with Large Scale Shell Model (LSSM) calculations. Doppler Shift Attenuation Method (DSAM). The Indian National Gamma Array (INGA) spectrometer at the Pelletron-Linac facility, TIFR, Mumbai, India.

doi: 10.1016/j.nuclphysa.2020.121785
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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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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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2018PR03      Phys.Rev. C 97, 044309 (2018)

Pragati, A.Y.Deo, S.K.Tandel, S.S.Bhattacharjee, S.Chakraborty, S.Rai, S.G.Wahid, S.Kumar, S.Muralithar, R.P.Singh, I.Bala, R.Garg, A.K.Jain

Parity doublet structures in doubly-odd 216Fr

NUCLEAR REACTIONS 208Pb(11B, 3n), E=54-62 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ)(DCO), γγ(linear polarization) using the INGA array at the 15-UD pelletron accelerator facility of IUAC, New Delhi. 216Fr; deduced high-spin levels, J, π, parity doublet (simplex-partner) structures, B(E1)/B(E2) ratios, and enhancement of octupole correlations. Systematics of E1 energy splitting, and angular momentum versus rotational frequency plots for 216Fr, 219,223Th, 218,220Ac, and B(E1)/B(E2) ratios for 216Fr and 218Ac.

doi: 10.1103/PhysRevC.97.044309
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2017MU12      Phys.Rev. C 96, 014315 (2017); Pub. Note Phys.Rev. C 96, 019901 (2017)

S.Mukhopadhyay, D.C.Biswas, S.K.Tandel, S.Frauendorf, L.S.Danu, P.N.Prashanth, B.N.Joshi, G.K.Prajapati, B.V.John, S.Nag, T.Trivedi, S.Saha, J.Sethi, R.Palit, P.K.Joshi

Semi-decoupled band and other high-spin band structures in 188Pt

NUCLEAR REACTIONS 174Yb(18O, 4n)188Pt, E=85 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ)(DCO), γγ(linear pol)(IPDCO) using the INGA array at the Pelletron-Linac facility of TIFR-Mumbai. 188Pt; deduced high-spin levels, J, π, multipolarities, bands, semi-decoupled band, alignments, staggering. Comparison with cranking model calculations. Systematics of staggering and negative-parity sequences based on 5- in 186,188,190,192,194,196Pt.

doi: 10.1103/PhysRevC.96.014315
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2016BI02      Phys.Rev. C 93, 034324 (2016)

S.Biswas, R.Palit, A.Navin, M.Rejmund, A.Bisoi, M.S.Sarkar, S.Sarkar, S.Bhattacharyya, D.C.Biswas, M.Caamano, M.P.Carpenter, D.Choudhury, E.Clement, L.S.Danu, O.Delaune, F.Farget, G.de France, S.S.Hota, B.Jacquot, A.Lemasson, S.Mukhopadhyay, V.Nanal, R.G.Pillay, S.Saha, J.Sethi, P.Singh, P.C.Srivastava, S.K.Tandel

Structure of 13252Te80: The two-particle and two-hole spectrum of 13250Sn82

NUCLEAR REACTIONS 232Th(7Li, F)132Te, E=5.4 MeV/nucleon; 9Be(238U, F), E=6.2 MeV/nucleon; measured Eγ, Iγ, γγ-coin, γγ(t), (fragment)γ-, (fragment)γγ-coin, γγ(θ) using INGA array at TIFR-BARC Pelletron LINAC facility for (7Li, F) reaction, and EXOGAM-VAMOS++ system at GANIL for (238U, F) reaction. 132Te; deduced high-spin levels, J, π, multipolarity, configurations, proton and neutron wavefunction amplitudes, p-n correlations at high spin. Comparison with shell-model calculations using jj55pna and modified jj55pna interactions. Systematics of positive-parity level energies in 122,124,126,128,130,132,134,136Te.

NUCLEAR STRUCTURE 132Te; calculated levels, J, π, proton and neutron wavefunction amplitudes, decomposition of the total angular momentum of positive- and negative-parity states using shell model jj55pna and modified jj55pna interactions. Comparison with experimental values. 132Te, 130Sn; 130Te, 128Sn; 128Te, 126Sn; deduced energy differences between the experimental and calculated energy levels of positive-parity as a function of spin, with calculations using shell model.

doi: 10.1103/PhysRevC.93.034324
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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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2016RA08      Phys.Rev. C 93, 034317 (2016)

M.K.Raju, P.V.Madhusudhana Rao, S.Muralithar, R.P.Singh, G.H.Bhat, J.A.Sheikh, S.K.Tandel, P.Sugathan, T.Seshi Reddy, B.V.Thirumala Rao, R.K.Bhowmik

Observation of a γ band based on a two-quasiparticle configuration in 70Ge

NUCLEAR REACTIONS 64Ni(12C, 2nα), E=55 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ)(DCO) using the Gamma Detector Array (GDA) at the 15 UD Pelletron accelerator of IUAC-New Delhi. 70Ge; deduced high-spin levels, J, π, multipolarity, bands, alignments, Comparison with Cranked Hartree-Fock-Bogoliubov calculations, and triaxial projected shell-model calculations. Total Routhian surface calculations.

NUCLEAR STRUCTURE 68,70Ge; calculated levels, J, π, band alignments using triaxial projected shell-model. Comparison with experimental values.

doi: 10.1103/PhysRevC.93.034317
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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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2015CH05      Phys.Rev. C 91, 014318 (2015)

D.Choudhury, R.Palit, P.Singh, J.Sethi, S.Saha, S.Biswas, H.C.Jain, V.Nanal, R.G.Pillay, R.Donthi, S.K.Jadhav, B.S.Naidu, B.Maheshwari, A.K.Jain, S.C.Pancholi, R.P.Singh, S.Mukhopadhyay, D.C.Biswas, L.S.Danu, S.K.Tandel, L.Chaturvedi, K.R.Devi, S.Singh

Role of neutrons in the coexistence of magnetic and antimagnetic rotation bands in 107Cd

NUCLEAR REACTIONS 94Zr(18O, 5n), E=90 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ)(DCO), γγ(linear pol), level half-lives by DSAM using INGA array at TIFR-BARC Pelletron-Linac facility. 107Cd; deduced levels, J, π, multipolarity, configuration, B(M1), alignment plots, magnetic (shears) and antimagnetic rotational (MR and AMR) bands. Comparison with tilted axis cranking and semiclassical model (SCM) calculations.

doi: 10.1103/PhysRevC.91.014318
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2015MA13      Phys.Rev.Lett. 114, 082501 (2015)

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

Transverse Wobbling in 135Pr

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

doi: 10.1103/PhysRevLett.114.082501
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2015RA20      Phys.Rev. C 92, 064324 (2015)

M.K.Raju, P.V.Madhusudhana Rao, S.K.Tandel, P.Sugathan, R.P.Singh, S.Muralithar, T.Seshi Reddy, B.V.Thirumala Rao, J.Meng, S.Zhang, J.Li, Q.B.Chen, B.Qi, R.K.Bhowmik

High spin spectroscopy and shape coexistence in 73As

NUCLEAR REACTIONS 64Ni(12C, 2npγ), E=55 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ)(DCO), σ using GDA array at 15UD Pelletron facility of IUAC-New Delhi. Enriched target. 73As; deduced high-spin levels, J, π, bands, multipolarity, alignments, moment of inertia plots, signature splitting, configuration, shape coexistence; calculated potential energy surface (PES) contour in (β, γ) plane. Cranked shell-model (CSM), particle-rotor model (PRM), and relativistic mean-field (RMF) calculations.

doi: 10.1103/PhysRevC.92.064324
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2015TA20      Pramana 85, 385 (2015)

S.K.Tandel

Spectroscopy of heavy fissionable nuclei

doi: 10.1007/s12043-015-1053-1
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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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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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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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2014MU12      Phys.Lett. B 739, 462 (2014)

S.Mukhopadhyay, D.C.Biswas, S.K.Tandel, L.S.Danu, B.N.Joshi, G.K.Prajapati, S.Nag, T.Trivedi, S.Saha, J.Sethi, R.Palit, P.K.Joshi

Coexisting shape- and high-K isomers in the shape transitional nucleus188Pt

NUCLEAR REACTIONS 174Yb(18O, 4n)188Pt, E=85 MeV; measured reaction products, Eγ, Iγ, γ-γ-coin.; deduced energy levels, J, π, B(E2), K-isomeric states, shape evolution, yrast positive parity structure. Comparison with available data, Ultimate Cranker calculations.

doi: 10.1016/j.physletb.2014.10.069
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2013TA12      Phys.Rev. C 87, 034319 (2013)

S.K.Tandel, M.Hemalatha, A.Y.Deo, S.B.Patel, R.Palit, T.Trivedi, J.Sethi, S.Saha, D.C.Biswas, S.Mukhopadhyay

Evolution of octupole collectivity in 221Th

NUCLEAR REACTIONS 208Pb(16O, 3n), E=86 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ)(DCO) using INGA array at TIFR facility. 221Th; deduced high-spin levels, J, π, bands, multipolarity, moment of inertia plots, reflection-asymmetric octupole structures, intrinsic electric dipole moment. Systematics of energy splittings between positive and negative-parity states in odd-A (A=219-225) Th nuclei. Comparison with Woods-Saxon cranking calculations including octupole deformation.

doi: 10.1103/PhysRevC.87.034319
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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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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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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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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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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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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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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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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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2007NG03      Phys.Rev. C 75, 034305 (2007)

E.Ngijoi-Yogo, S.K.Tandel, G.Mukherjee, I.Shestakova, P.Chowdhury, C.Y.Wu, D.Cline, A.B.Hayes, R.Teng, R.M.Clark, P.Fallon, A.O.Macchiavelli, K.Vetter, F.G.Kondev, S.Langdown, P.M.Walker, C.Wheldon, D.M.Cullen

Collective rotation and vibration in neutron-rich 180, 182Hf nuclei

NUCLEAR REACTIONS 180Hf(136Xe, X)180Hf/182Hf, E=750 MeV; measured Eγ, Iγ, γγ-, (particle)γ-coin. 180,182Hf deduced levels, J, π, rotational and vibrational bands features. Gammasphere, Chico arrays.

doi: 10.1103/PhysRevC.75.034305
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2006DE15      Phys.Rev. C 73, 034313 (2006)

A.Y.Deo, S.B.Patel, S.K.Tandel, S.Muralithar, R.P.Singh, R.Kumar, R.K.Bhowmik, S.S.Ghugre, A.K.Singh, V.Kumar, Amita

Systematics of the shears mechanism in silver isotopes

NUCLEAR REACTIONS 78Se(32S, 2npα), E=130 MeV; 80Se(30Si, 4np), (30Si, 3np), E=120 MeV; measured Eγ, Iγ, γγ-coin, DSA. 103,105,106Ag levels deduced T1/2, B(M1), B(E2). Comparison with tilted-axis cranking model predictions.

doi: 10.1103/PhysRevC.73.034313
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2006DR07      Phys.Rev.Lett. 97, 122501 (2006)

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

Anomalous Isomeric Decays in 174Lu as a Probe of K Mixing and Interactions in Deformed Nuclei

NUCLEAR REACTIONS 175,176Lu, 174Yb(136Xe, X)174Lu, E=6.0 MeV/nucleon; measured prompt and delayed Eγ, Iγ, γγ-coin. 174Lu deduced levels, J, π, configurations, isomer T1/2, K-mixing. Gammasphere array.

doi: 10.1103/PhysRevLett.97.122501
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2006HA46      Phys.Rev. C 74, 054314 (2006); Erratum Phys.Rev. C 75, 029902 (2007)

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

Multiple band structures in 169Ta

NUCLEAR REACTIONS 124Sn(51V, 6n), E=228 MeV; measured Eγ, Iγ, γγ-coin. 169Ta deduced high-spin levels, J, π, configurations. Gammasphere array.

doi: 10.1103/PhysRevC.74.054314
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2006PE17      Phys.Rev. C 74, 014316 (2006)

D.Peterson, B.B.Back, R.V.F.Janssens, T.L.Khoo, C.J.Lister, D.Seweryniak, I.Ahmad, M.P.Carpenter, C.N.Davids, A.A.Hecht, C.L.Jiang, T.Lauritsen, X.Wang, S.Zhu, F.G.Kondev, A.Heinz, J.Qian, R.Winkler, P.Chowdhury, S.K.Tandel, U.S.Tandel

Decay modes of 250No

RADIOACTIVITY 250No(SF) [from 204Pb(48Ca, 2n)]; measured T1/2 for ground and isomeric state decay; deduced upper limit for α-decay branching ratio. 219,220Th(α) [from 176Yb(48Ca, xn)]; measured T1/2.

doi: 10.1103/PhysRevC.74.014316
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2006RI13      Phys.Scr. T125, 123 (2006)

M.A.Riley, M.K.Djongolov, A.O.Evans, D.J.Hartley, R.V.F.Janssens, E.S.Paul, A.Pipidis, J.Simpson, A.A.Aguilar, D.E.Appelbe, C.R.Bingham, D.B.Campbell, M.P.Carpenter, P.Chowdhury, P.T.W.Choy, R.M.Clark, M.Cromaz, D.M.Cullen, M.Danchev, G.D.Dracoulis, P.Fallon, A.Gorgen, G.B.Hagemann, D.T.Joss, J.Goon, R.A.Kaye, T.L.Khoo, F.G.Kondev, R.W.Laird, K.Lagergren, T.Lauritsen, A.O.Macchiavelli, B.McClain, E.F.Moore, G.Mukherjee, E.Ngijoi-Yogo, P.J.Nolan, H.I.Park, L.L.Riedinger, G.Sletten, S.K.Tandel, P.M.Walker, D.Ward, I.Ragnarsson, F.Saric, J.Zhang

Observation of states beyond band termination in 156, 157, 158Er and strongly deformed structures in 173, 174, 175Hf

NUCLEAR REACTIONS 114Cd(48Ca, 4n), (48Ca, 5n), (48Ca, 6n), E=215 MeV; measured Eγ, Iγ, γγ-coin. 156,157,158Er deduced high-spin levels, states above band termination. Gammasphere array.

NUCLEAR STRUCTURE 173,174,175Hf; analyzed data; deduced superdeformed bands features.

doi: 10.1088/0031-8949/2006/T125/028
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2006TA13      Phys.Rev. C 73, 044306 (2006)

S.K.Tandel, P.Chowdhury, E.H.Seabury, I.Ahmad, M.P.Carpenter, S.M.Fischer, R.V.F.Janssens, T.L.Khoo, T.Lauritsen, C.J.Lister, D.Seweryniak, Y.R.Shimizu

High-K isomers and rotational structures in 174W

NUCLEAR REACTIONS 128Te(50Ti, 4n), E=215, 225 MeV; measured prompt and delayed Eγ, Iγ, γγ-coin. 174W deduced high-spin levels, J, π, configurations, high-K isomeric states T1/2. Gammasphere array, comparison with cranked mean-field model predictions.

doi: 10.1103/PhysRevC.73.044306
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2006TA19      Phys.Rev.Lett. 97, 082502 (2006)

S.K.Tandel, T.L.Khoo, D.Seweryniak, G.Mukherjee, I.Ahmad, B.Back, R.Blinstrup, M.P.Carpenter, J.Chapman, P.Chowdhury, C.N.Davids, A.A.Hecht, A.Heinz, P.Ikin, R.V.F.Janssens, F.G.Kondev, T.Lauritsen, C.J.Lister, E.F.Moore, D.Peterson, P.Reiter, U.S.Tandel, X.Wang, S.Zhu

K Isomers in 254No: Probing Single-Particle Energies and Pairing Strengths in the Heaviest Nuclei

NUCLEAR REACTIONS 208Pb(48Ca, 2n), E=217 MeV; measured delayed Eγ, Iγ, E(ce), I(ce), (ce)γ-coin, X-ray spectra. 254No deduced levels, J, π, isomeric states T1/2, configurations, deformation. Mass separator, recoil-decay tagging.

doi: 10.1103/PhysRevLett.97.082502
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2005DE02      Phys.Rev. C 71, 017303 (2005)

A.Y.Deo, S.K.Tandel, S.B.Patel, P.V.Madhusudhana Rao, S.Muralithar, R.P.Singh, R.Kumar, R.K.Bhowmik, Amita

Lifetime measurements in 112Sb

NUCLEAR REACTIONS 89Y(30Si, 3nα), E=120 MeV; measured Eγ, Iγ, γγ-coin, DSA. 112Sb levels deduced T1/2, B(M1), B(E2). Comparisons with tilted axis cranking model predictions.

doi: 10.1103/PhysRevC.71.017303
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2005DR05      Phys.Rev. C 71, 044326 (2005); Erratum Phys.Rev. C 73, 019901 (2006)

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

Structure of two-, four-, and six-quasiparticle isomers in 174Yb and K-forbidden decays

NUCLEAR REACTIONS 175,176Lu, 174Yb(136Xe, X)174Yb, E=6 MeV/nucleon; 173Yb(18O, 17O), E not given; measured prompt and delayed Eγ, Iγ, γγ-coin. 174Yb deduced high-spin levels, J, π, δ, isomers T1/2, configurations. Gammasphere, Caesar arrays.

doi: 10.1103/PhysRevC.71.044326
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2005HA05      Phys.Lett. B 608, 31 (2005)

D.J.Hartley, M.K.Djongolov, L.L.Riedinger, G.B.Hagemann, R.V.F.Janssens, F.G.Kondev, E.F.Moore, M.A.Riley, A.Aguilar, C.R.Bingham, D.B.Campbell, M.P.Carpenter, P.Chowdhury, M.Cromaz, D.M.Cullen, M.Danchev, G.D.Dracoulis, P.Fallon, J.Goon, R.A.Kaye, T.L.Khoo, R.W.Laird, T.Lauritsen, A.O.Macchiavelli, B.McClain, G.Mukherjee, E.Ngijoi-Yogo, H.I.Park, G.Sletten, S.K.Tandel, P.M.Walker, J.-Y.Zhang

Wobbling excitations in strongly deformed Hf nuclei?

NUCLEAR REACTIONS 130Te(48Ca, 4n), (48Ca, 5n), E=200, 205 MeV; measured Eγ, Iγ, γγ-coin, DSA. 174Hf deduced superdeformed bands transitions, T1/2, quadrupole moments. 173Hf deduced superdeformed band transitions. Gammasphere array, comparisons with model predictions.

doi: 10.1016/j.physletb.2005.01.007
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2005HA71      Phys.Rev. C 72, 064325 (2005)

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

Detailed high-spin spectroscopy and the search for the wobbling mode in 171Ta

NUCLEAR REACTIONS 124Sn(51V, 4n), E=228 MeV; measured Eγ, Iγ, γγ-coin. 171Ta deduced high-spin levels, J, π, configurations. No wobbling sequence seen. Gammasphere array.

doi: 10.1103/PhysRevC.72.064325
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2005RI16      J.Phys.(London) G31, S1735 (2005)

M.A.Riley, M.K.Djongolov, A.O.Evans, D.J.Hartley, R.V.F.Janssens, E.S.Paul, J.Simpson, A.A.Aguilar, D.E.Appelbe, C.R.Bingham, D.B.Campbell, M.P.Carpenter, P.Chowdhury, P.T.W.Choy, R.M.Clark, M.Cromaz, D.M.Cullen, M.Danchev, G.D.Dracoulis, P.Fallon, A.Gorgen, G.B.Hagemann, D.T.Joss, J.Goon, R.A.Kaye, T.L.Khoo, F.G.Kondev, R.W.Laird, K.Lagergren, T.Lauritsen, A.O.Macchiavelli, B.McClain, E.F.Moore, G.Mukherjee, E.Ngijoi-Yogo, P.J.Nolan, H.I.Park, A.Pipidis, L.L.Riedinger, G.Sletten, S.K.Tandel, P.M.Walker, D.Ward, I.Ragnarsson, F.Saric, J.Zhang

Beyond band termination in 157Er and the search for wobbling excitations in strongly deformed 174Hf

NUCLEAR REACTIONS 114Cd(48Ca, 5n), E=215 MeV; measured Eγ, Iγ, γγ-coin. 157Er deduced high-spin levels, J, π, band termination features. Gammasphere array.

NUCLEAR STRUCTURE 173,174Hf; analyzed superdeformed band transitions fractional Doppler shifts, transition quadrupole moments.

doi: 10.1088/0954-3899/31/10/064
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2004DR06      Phys.Lett. B 584, 22 (2004)

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

Identification of yrast high-K isomers in 177Lu and characterisation of 177mLu

NUCLEAR REACTIONS 175,176Lu, 174Yb(136Xe, X)177Lu, E=6 MeV/nucleon; measured prompt and delayed Eγ, Iγ, γγ-coin. 177Lu deduced levels, J, π, high-spin isomers T1/2, configurations, hindrances. Possible β-decay from isomer discussed. Gammasphere array.

doi: 10.1016/j.physletb.2004.01.056
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2004KO58      Eur.Phys.J. A 22, 23 (2004)

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

K-Mixing and fast decay of a seven-quasiparticle isomer in 179Ta

NUCLEAR REACTIONS 176Lu(136Xe, X)179Ta, E=820 MeV; measured prompt and delayed Eγ, Iγ, γγ-coin. 179Ta deduced high-spin levels, J, π, configurations, isomeric states T1/2, K-mixing features. Gammasphere array.

doi: 10.1140/epja/i2004-10025-9
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2002TA11      Phys.Rev. C65, 054307 (2002)

S.K.Tandel, S.R.Kore, S.B.Patel, S.Muralithar, R.P.Singh, R.K.Bhowmik

Rotational Bands and Noncollective Structures in 85Zr

NUCLEAR REACTIONS 58Ni(31P, n3p), E=130 MeV; 56Fe(32S, n2p), E=120 MeV; measured Eγ, Iγ, γγ-coin, DSA. 85Zr deduced high-spin levels, J, π, T1/2, B(E2), quadrupole moments. Comparison with cranked mean-field results.

doi: 10.1103/PhysRevC.65.054307
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1998TA07      Nucl.Phys. A632, 3 (1998)

S.K.Tandel, S.B.Patel, R.K.Bhowmik, A.K.Sinha, S.Muralithar, N.Madhavan

Alignments and New Band Structures in the Doubly Odd Nucleus 80Rb

NUCLEAR REACTIONS 51V(32S, n2p), E=105 MeV; measured γγ-, (recoil)γ-coin. 80Rb deduced high-spin levels, J, π, identical bands, alignments. Cranked shell-model analysis.

doi: 10.1016/S0375-9474(97)00652-0
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1998TA26      Phys.Rev. C58, 3738 (1998)

S.K.Tandel, S.B.Patel, P.Joshi, G.Mukherjee, R.P.Singh, S.Muralithar, P.Das, R.K.Bhowmik

Structure of the Neutron Deficient 107In

NUCLEAR REACTIONS 66Zn(45Sc, 2n2p), E=162 MeV; measured Eγ, Iγ, γγ-coin. 107In deduced high-spin levels, J, π, configurations.

doi: 10.1103/PhysRevC.58.3738
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1997TA02      Z.Phys. A357, 3 (1997)

S.K.Tandel, S.B.Patel, P.Das, R.P.Singh, R.K.Bhowmik

High Spin Spectroscopy of 100Pd

NUCLEAR REACTIONS 66Zn(37Cl, 2np), E=130 MeV; measured γγ-coin. 100Pd deduced high-spin levels, J, π, band structure, configuration.

doi: 10.1007/s002180050204
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1997TA21      Phys.Rev. C56, R2358 (1997)

S.K.Tandel, S.B.Patel, R.K.Bhowmik, A.K.Sinha, S.Muralithar, N.Madhavan

Identification of Δν = 2 Identical Bands in the Nuclei 78Kr and 80Rb

NUCLEAR REACTIONS 51V(32S, n2p), E=105 MeV; measured Eγ, Iγ, γγ-, (recoil)γ-coin. 80Rb deduced high-spin levels, possible J, π, configurations. Cranked shell model analysis, comparison with 78Kr levels.

doi: 10.1103/PhysRevC.56.R2358
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