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NSR database version of May 21, 2024.

Search: Author = J.A.Sheikh

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2024DA06      Phys.Lett. B 851, 138565 (2024)

Sh. Dar, S.Bhattacharyya, S.Chakraborty, S.Jehangir, S.Bhattacharya, G.H.Bhat, J.A.Sheikh, N.Rather, S.S.Nayak, S.Das, S.Basu, G.Mukherjee, S.Nandi, R.Banik, S.Basak, C.Bhattacharya, S.Chattopadhyay, S.Das Gupta, A.Karmakar, S.S.Ghugre, D.Kumar, D.Mondal, S.Mukhopadhyay, D.Pandit, S.Rajbanshi, R.Raut

Coexistence of low-K oblate and high-K prolate g9/2 proton-hole bands in 115Sb

NUCLEAR REACTIONS 115In(α, 4n), E=52 MeV; measured reaction products, Eγ, Iγ; deduced γ-ray energies and relative intensities, partial level scheme, positive parity sequence transitions, low-K decoupled band. Comparison with the frameworks of the projected shell model and the total Routhian surface calculations. The Indian National Gamma Array (INGA), the K-130 Cyclotron at Variable Energy Cyclotron Centre (VECC), Kolkata, India.

doi: 10.1016/j.physletb.2024.138565
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2024RA11      J.Phys.(London) G51, 035104 (2024)

A.K.Rana, S.Sihotra, H.P.Sharma, V.Singh, G.H.Bhat, S.Jehangir, J.A.Sheikh, N.Rather, Kuldeep, N.Singh, R.K.Bhowmik, R.Kumar, R.P.Singh, S.Muralithar, P.Chauhan, D.S.Verma, T.Trivedi, S.Kumar, R.Palit, D.Mehta

Level structures of 96Tc and their microscopic description

NUCLEAR REACTIONS 75As(28Si, 3n4p)96Tc, E=120 MeV; measured reaction products, Eγ, Iγ; deduced γ-ray energies and relative intensities, energy level, J, π, partial level scheme, high-spin states, DCO and IPDCO ratios, multipolarities. Comparison with the framework of triaxial projected shell model calculations. The 15UD Pelletron accelerator facility at inter university accelerator centre (IUAC), New Delhi.

doi: 10.1088/1361-6471/ad1f2e
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2024RO03      Eur.Phys.J. A 60, 40 (2024)

S.P.Rouoof, N.Nazir, S.Jehangir, G.H.Bhat, J.A.Sheikh, N.Rather, S.Frauendorf

Fingerprints of the triaxial deformation from energies and B(E2) transition probabilities of γ-bands in transitional and deformed nuclei

NUCLEAR STRUCTURE 154,156Gd, 156,158,160,162Dy, 164,166,170Er, 180Hf, 232Th, 238U, 76,78Se, 76Ge, 104,106,108Mo, 108,110,112,114Ru, 182,184,186,188,190,192Os, 192,194Pt; calculated energies and B(E2) transitions involving the states of the ground- and γ-bands in transitional and deformed nuclei using the triaxial projected shell model (TPSM) approach; deduced the emergence of the staggering phenomena in the transitions in the terms of interactions between the bands.

doi: 10.1140/epja/s10050-024-01257-y
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2023CH32      J.Phys.(London) G50, 075106 (2023)

S.Chakraborty, H.P.Sharma, S.Jehangir, S.S.Tiwary, C.Majumder, A.K.Gupta, G.H.Bhat, J.A.Sheikh, N.Rather, P.Banerjee, S.Ganguly, S.Rai, Pragati, S.Muralithar, R.P.Singh, S.S.Bhattacharjee, S.Kumar, Mayank, A.Kumar, R.Palit

Three-quasineutron γ-band in 127Xe

NUCLEAR REACTIONS 122Sn(9Be, 4n), E=48 MeV; measured reaction products, Eγ, Iγ; deduced γ-ray energies and relative intensities, J, π, partial level scheme, structures of negative parity multi-quasiparticle states, new negative parity bands. Comparison with the triaxial projected shell model (TPSM) approach. The Indian National Gamma Array (INGA), the 15UD pelletron accelerator facility at Inter-University Accelerator Centre (IUAC), New Delhi.

doi: 10.1088/1361-6471/acd86a
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2023FA01      Nucl.Phys. A1030, 122572 (2023)

M.Faisal, R.Devi, S.K.Khosa, G.H.Bhat, J.A.Sheikh

Study of normal deformed bands in light Lutetium isotopes

NUCLEAR STRUCTURE 161,163,165Lu; calculated energy levels, J, π, B(E2), alignment frequencies of the normally deformed bands using the projected shell model. Comparison with available data.

doi: 10.1016/j.nuclphysa.2022.122572
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2023FA12      Int.J.Mod.Phys. E32, 2350041 (2023)

M.Faisal, R.Devi, S.K.Khosa, G.H.Bhat, J.A.Sheikh

Microscopic study of normal deformed bands in 167, 169, 171Lu

NUCLEAR STRUCTURE 167,169,171Lu; calculated energy levels, J, π, B(E2), normal deformed bands using projected shell model approach. Comparison with available data.

doi: 10.1142/S0218301323500416
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2023GU21      Eur.Phys.J. A 59, 258 (2023)

S.Gupta, R.Bakshi, S.Gupta, S.Singh, A.Bharti, G.H.Bhat, J.A.Sheikh

Theoretical perspectives of nuclear structure in 82-88Ge and 66-74Se isotopes

NUCLEAR STRUCTURE 82,84,86,88Ge, 66,68,70,72,74Se; calculated energy levels, J, π, vibrational bands, back bending, moments of inertia, g-factor, B(E2) using the triaxial projected shell model (TPSM).

doi: 10.1140/epja/s10050-023-01166-6
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2023MU10      Phys.Rev. C 107, 054310 (2023)

A.Mukherjee, S.Bhattacharya, T.Trivedi, S.Tiwari, R.P.Singh, S.Muralithar, Yashraj, K.Katre, R.Kumar, R.Palit, S.Chakraborty, S.Jehangir, N.Nazir, S.P.Rouoof, G.H.Bhat, J.A.Sheikh, N.Rather, R.Raut, S.S.Ghugre, S.Ali, S.Rajbanshi, S.Nag, S.S.Tiwary, A.Sharma, S.Kumar, S.Yadav, A.K.Jain

Evidence of transverse wobbling motion in 151Eu

NUCLEAR REACTIONS 148Nd(7Li, 4n)151Eu, E=30 MeV; measured Eγ, Iγ, γγ-coin γγ(θ). 151Eu; deduced levels, J, π, high-spin states, directional correlation of oriented states (DCO) ratio, polarization asymmetries, mixing ratios, δ, rotational bands structure, B(E2in)/B(E2out), B(M1in)/B(E2out). Comparison to triaxial projected shell model calculations. Evidences of presence of transverse wobbling in 151Eu. Systematics of wobbling excitation energies for 151Eu, 135Pr, 133Ba, 183Au, 187Au, 133La and 127Xe. Indian National Gamma Array (INGA) consisting of 16 Compton suppressed clover detectors and 2 ancillary LEPS detectors at 15 UD pelletron (IUAC, New Delhi).

doi: 10.1103/PhysRevC.107.054310
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2023NA07      Phys.Rev. C 107, L021303 (2023)

N.Nazir, S.Jehangir, S.P.Rouoof, G.H.Bhat, J.A.Sheikh, N.Rather, S.Frauendorf

Microscopic aspects of γ softness in atomic nuclei

NUCLEAR STRUCTURE 104Ru; calculated levels, J, π, staggering parameter for γ-band, reduced E2 and M1 matrix elements - in-band, diagonal and interband, quadrupole shape invariants for ground state band and γ-band. Analysis show that admixtures of quasiparticle states into the collective vacuum configuration can transform the pattern of the energies and E2 matrix elements from γ-rigid to γ-soft character. Triaxial projected shell model (TPSM) approach. Comparison to data obtained in COULEX experiments and results of calculations performed in the framework of quadrupole collective Bohr Hamiltonian (QCBH) approach.

doi: 10.1103/PhysRevC.107.L021303
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2023NA27      Phys.Rev. C 108, 044308 (2023)

N.Nazir, S.Jehangir, S.P.Rouoof, G.H.Bhat, J.A.Sheikh, N.Rather, M.A.Malik

Triaxial projected shell model approach for negative parity states in even-even nuclei

doi: 10.1103/PhysRevC.108.044308
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2023PA23      Chin.Phys.C 47, 084002 (2023)

A.Pandey, R.Bhushan, A.Rohilla, C.Majumder, H.P.Sharma, S.Chakraborty, R.P.Singh, S.Muralithar, Yashraj, K.Katre, B.Rohila, Subodh, A.Kumar, I.M.Govil, S.Jehangir, N.Rather, G.H.Bhati, A.A.Wani, J.A.Sheikh, S.K.Chamoli

Revisiting band structures in 118Xe nucleus via in-beam γ-ray spectroscopy

NUCLEAR REACTIONS 93Nb(28Si, 2np), E=115 MeV; measured reaction products, Eγ, Iγ; deduced γ-ray energies and relative intensities, J, π, partial level scheme, DCO ratios, B(E1), B(E1)/B(E2), high-spin states. Comparison with Triaxial projected shell model (TPSM). The 15 UD pelletron accelerator facility at IUAC, New Delhi.

doi: 10.1088/1674-1137/acd83d
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2022BA23      Eur.Phys.J. A 58, 89 (2022)

R.Bakshi, R.Gupta, S.Gupta, A.Kumar, S.Singh, A.Bharti, G.H.Bhat, J.A.Sheikh

Microscopic insights into the nuclear structure of 98-106Ru nuclei

NUCLEAR STRUCTURE 98,100,102,104,106Ru; calculated ground and excited states energies, J, π, yrast, γ- and 2γ-bands, Kinetic Moment of inertia using multi-quasiparticle triaxial projected shell model (TPSM). Comparison with available data.

doi: 10.1140/epja/s10050-022-00734-6
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2022BA45      Eur.Phys.J. A 58, 253 (2022)

R.Bakshi, R.Gupta, A.Kumar, S.Singh, A.Bharti, G.H.Bhat, J.A.Sheikh

Structural evolution and shape transitions of even-even neutron rich 140-150Ba nuclei using triaxial projected shell model

NUCLEAR STRUCTURE 140,142,144,146,148,150Ba; calculated variation of Potential Energy Surfaces(PES) of ground state as a function of triaxiality parameter, energy levels, J, π using triaxial projected shell model. Comparison with available data.

doi: 10.1140/epja/s10050-022-00902-8
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2022BE12      Int.J.Mod.Phys. E31, 2250027 (2022)

N.Behera, G.H.Bhat, Z.Naik, R.Palit, Y.Sun, J.A.Sheikh

Study of band structure in 76Kr using triaxial projected shell model

NUCLEAR STRUCTURE 76Kr; calculated energy levels, bands, staggering parameters using the multi-quasiparticle triaxial projected shell model (TPSM).

doi: 10.1142/S0218301322500276
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2022BH04      Phys.Rev. C 106, 044312 (2022)

S.Bhattacharya, T.Trivedi, A.Mukherjee, D.Negi, R.P.Singh, S.Muralithar, S.Jehangir, G.H.Bhat, N.Nazir, J.A.Sheikh, N.Rather, R.Palit, S.Nag, S.Rajbanshi, S.Chakraborty, S.Kumar, M.Kumar Raju, V.V.Parkar, D.Choudhury, R.Kumar, R.K.Bhowmik, S.C.Pancholi, A.K.Jain

Evidence for prolate-oblate shape coexistence in the odd-A 7335Br38 nucleus

NUCLEAR REACTIONS 50Cr(28Si, pα)73Br, E=90 MeV; measured Eγ, Iγ, γγ-coin, γ(θ), 73Br; deduced levels, J, π, high-spin states states, bands structure, δ, T1/2 of 9/2+ excited state, polarization asymmetry, DCO and ADO ratios. Comparison to Projected shell model (PSM) calculations and other experimental data. Systematics of monopole transition strength in 73Br, calculated from the semiempirical approach with neighboring Se, Br, and Kr. Evidences provided for the prolate-oblate shape coexistence at low excitation energy. INGA array at IUAC, New Delhi.

doi: 10.1103/PhysRevC.106.044312
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2022JE02      Phys.Rev. C 105, 054310 (2022)

S.Jehangir, N.Nazir, G.H.Bhat, J.A.Sheikh, N.Rather, S.Chakraborty, R.Palit

Extended triaxial projected shell model approach for odd-neutron nuclei

NUCLEAR STRUCTURE 117,119,121,123,125,127,129,131Xe; calculated levels, J, π, amplitudes of projected K configurations, dynamic moments of inertia, transition quadrupole moments, aligned angular momenta, signature splitting for yrast and yrare bands. Triaxial projected shell model (TPSM) approach. Comparison to experimental data.

doi: 10.1103/PhysRevC.105.054310
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2022KA31      Phys.Rev. C 106, 034323 (2022)

K.Katre, P.V.Madhusudhana Rao, R.Raut, A.Sharma, K.Suryanarayana, A.Tejaswi, M.Ratna Raju, D.Vijaya Lakshmi, T.Seshi Reddy, M.Kumar Raju, S.Jehangir, N.Rather, G.H.Bhat, N.Nazir, J.A.Sheikh, Y.P.Wang, J.T.Matta, A.D.Ayangeakaa, U.Garg, S.S.Ghugre, T.Trivedi, B.S.Naidu, R.Palit, S.Saha, S.Muralithar, R.P.Singh

Chiral-like doublet band structure and octupole correlations in 104Ag

NUCLEAR REACTIONS 76Ge(32S, 3np)104Ag, E=110 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ)(DCO), level T1/2 by DSAM using INGA array of 18 Compton suppressed clover detectors at the 14-UD BARC-TIFR Pelletron Facility. 104Ag; deduced high-spin levels, J, π, multipolarities, bands, B(M1), B(E2), B(E1), B(M1)/B(E1), B(M1)/B(E2), spherical configurations, moment of inertia plots, alignments; calculated potential energy surface in the (β-γ) deformation plane, octupole correlations, enhanced E1 transitions, chiral-like doublet band. Comparison with theoretical calculations using triaxial projected shell model (TPSM) and covariant density functional theory (CDFT).

doi: 10.1103/PhysRevC.106.034323
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2022RA02      Nucl.Phys. A1018, 122375 (2022)

P.Ray, H.Pai, S.Ali, A.Mukherjee, S.Rajbanshi, S.Chakraborty, S.Bhattacharya, R.Banik, S.Nandi, S.Bhattacharyya, G.Mukherjee, C.Bhattacharya, G.Gangopadhyay, S.Samanta, S.Das, S.Chatterjee, R.Raut, S.S.Ghugre, P.C.Srivastava, S.Jehangir, B.Bhoy, N.Rather, G.H.Bhat, J.A.Sheikh, A.Goswami

Three-phonon multiplets in 116Sn

NUCLEAR REACTIONS 114Cd(α, 2n), E=34 MeV; measured reaction products, Eγ, Iγ, γγ-coin.; deduced γ-ray energies and intensities, J, π, level scheme, multipolarities, intruder configurations. Interacting Boson Model (IBM) and spherical shell model calculations. The Indian National Gamma Array (INGA).

doi: 10.1016/j.nuclphysa.2021.122375
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2022RA03      Nucl.Phys. A1019, 122383 (2022)

M.Rajput, S.Singh, P.Verma, V.Rani, A.Bharti, G.H.Bhat, J.A.Sheikh

Triaxial projected shell model study of γ-bands in even even 104-122Cd nuclei

NUCLEAR STRUCTURE 104,106,108,110,112,114,116,118,120,122Cd; calculated projected energy surfaces, Nilsson quasiparticle energies, bands, energy levels, J, π, staggering parameters using multi-quasip article triaxial projected shell model (TPSM) approach. Comparison with available data.

doi: 10.1016/j.nuclphysa.2022.122383
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2022RA22      Eur.Phys.J. A 58, 146 (2022)

M.Rajput, S.Singh, V.Rani, P.Verma, A.Bharti, G.H.Bhat, J.A.Sheikh

Theoretical study of nuclear structure properties of positive parity states of odd mass 103-117Ag nuclei

NUCLEAR STRUCTURE 103,105,107,109,111,113,115,117Ag; calculated kinematic moment of inertia, positive parity band diagram for lowest-lying bands, PSM yrast spectra, yrast energy splitting, average probability amplitude of various projected K-configurations, B(E2) ratios, B(M1) by employing the theoretical framework of the Projected Shell Model (PSM).

doi: 10.1140/epja/s10050-022-00802-x
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2021BA04      Phys.Rev. C 103, 014316 (2021)

F.S.Babra, S.Jehangir, R.Palit, S.Biswas, B.Das, S.Rajbanshi, G.H.Bhat, J.A.Sheikh, B.Das, P.Dey, U.Garg, Md.S.R.Laskar, C.Palshetkar, S.Saha, L.P.Singh, P.Singh

Investigation of the alignment mechanism and loss of collectivity in 135Pm

NUCLEAR REACTIONS 107Ag(32S, 2n2p)135Pm, E=145 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ)(DCO), γγ(linear polarization), half-lives of levels in the yrast band by Doppler-shift attenuation method (DSAM) using INGA array of 18 Compton-suppressed HPGe clover detectors at TIFR-Mumbai. 135Pm; deduced high-spin levels, J, π, multipolarities, rotational bands, alignments, configurations, B(E2), dynamic moment of inertia, loss of collectivity for the yrast band at higher spin. Comparison with triaxial projected shell model (TPSM) calculations.

doi: 10.1103/PhysRevC.103.014316
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2021GU20      Chin.J.Phys.(Taiwan) 72, 191 (2021)

R.Gupta, A.Kumar, S.Singh, A.Bharti, G.H.Bhat, J.A.Sheikh

Systematic investigation of γ-band structure of triaxial even-even neutron-deficient Os nuclei

NUCLEAR STRUCTURE 180,182,184,186,188,190,192Os; calculated energy levels, J, π, transition probabilities for the yrast band, high spin states, g-factors using a triaxial projected shell model (TPSM). Comparison with experimental data.

doi: 10.1016/j.cjph.2021.04.023
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2021JE03      Phys.Rev. C 104, 044322 (2021)

S.Jehangir, G.H.Bhat, N.Rather, J.A.Sheikh, R.Palit

Systematic study of near-yrast band structures in odd-mass 125-137Pr and 127-139Pm isotopes

NUCLEAR STRUCTURE 125,127,129,131,133,135,137Pr, 127,129,131,133,135,137,139Pm; calculated levels, J, π, bands, projected energies for bands, bandhead energies after configuration mixing and dominant intrinsic configurations, dominant probability contributions of projected configurations in the wave functions of the bandheads, aligned angular momenta, dynamic moments of inertia, probabilities of projected K-configurations in wave functions of the yrast bands for 127Pr and 131Pm. Triaxial projected shell-model (TPSM), including three- and five-quasiparticle configurations for odd-proton systems.

doi: 10.1103/PhysRevC.104.044322
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2021JE05      Eur.Phys.J. A 57, 308 (2021)

S.Jehangir, G.H.Bhat, J.A.Sheikh, S.Frauendorf, W.Li, R.Palit, N.Rather

Triaxial projected shell model study of Formula-bands in atomic nuclei

NUCLEAR STRUCTURE 154,156Gd, 156,158,160,162Dy, 164,166,168,170Er, 180Hf, 232Th, 238U, 104,106,108Mo, 108Ru, 110Ru, 112Ru, 114Ru; calculated stagerring parameters, J, γ-bands. Triaxial projected shell model (TPSM) approach.

doi: 10.1140/epja/s10050-021-00620-7
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2021MU09      Phys.Rev. C 104, 064318 (2021)

B.M.Musangu, E.H.Wang, J.H.Hamilton, S.Jehangir, G.H.Bhat, J.A.Sheikh, S.Frauendorf, C.J.Zachary, J.M.Eldridge, A.V.Ramayya, A.C.Dai, F.R.Xu, J.O.Rasmussen, Y.X.Luo, G.M.Ter-Akopian, Yu.Ts.Oganessian, S.J.Zhu

Chiral vibrations and collective bands in 104, 106Mo

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, multi-fold γγ-coin, γγ(θ) using Gammasphere array of 101 Ge detectors at Lawrence Berkeley National Laboratory (LBNL). 104,106Mo; deduced high-spin levels, J, π, rotational bands, chiral vibrational doublet bands, multipolarities, multipole mixing ratios. Comparison with Triaxial projected shell model (TPSM) calculations.

doi: 10.1103/PhysRevC.104.064318
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2021RA15      Nucl.Phys. A1014, 122253 (2021)

M.Rajput, P.Verma, S.Singh, V.Rani, A.Bharti, G.H.Bhat, J.A.Sheikh

Microscopic insight into the structure of negative parity yrast bands in 99-117Pd isotopes

NUCLEAR STRUCTURE 107,109,111,113,115,117Pd; analyzed available data; calculated yrast band energies, B(E2), level structure parameters using the theoretical framework of the Projected Shell Model. Comparison with available data.

doi: 10.1016/j.nuclphysa.2021.122253
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2021RA27      Eur.Phys.J. A 57, 274 (2021)

V.Rani, S.Singh, M.Rajput, P.Verma, A.Bharti, G.H.Bhat, J.A.Sheikh

Quasiparticle structure of low-lying yrast energy levels and γ-bands in 164-174Hf nuclei nuclei

NUCLEAR STRUCTURE 164,166,168,170,172,174Hf; calculated potential energy surfaces, J, π, quadrupole deformations, staggering parameter, γ-band, backbending, moment of inertia, g-factors. Comparison with available data.

doi: 10.1140/epja/s10050-021-00583-9
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2021SH09      Phys.Rev. C 103, 024324 (2021)

A.Sharma, R.Raut, S.Muralithar, R.P.Singh, S.S.Bhattacharjee, S.Das, S.Samanta, S.S.Ghugre, R.Palit, S.Jehangir, N.Rather, G.H.Bhat, J.A.Sheikh, S.S.Tiwary, Neelam, P.V.Madhusudhana Rao, U.Garg, S.K.Dhiman

Evidence of antimagnetic rotational motion in 103Pd

NUCLEAR REACTIONS 94Zr(13C, 4n)103Pd, E=55 MeV; measured Eγ, Iγ, half-lives of levels in the negative-parity yrast band by Doppler-shift attenuation method (DSAM) using the INGA array of 18 Compton suppressed HPGe clover detectors. 103Pd; deduced levels, J, π, B(E2), configurations, dynamic moment of inertia, antimagnetic rotational (AMR) band structure; calculated total Routhian surface (TRS) contour for the negative-parity yrast band in (β2cos(γ+30°), β2sin(γ+30°)) plane, and quasiparticle Routhians for proton and neutron using cranked-shell model. Comparison of spin versus angular frequency distribution and B(E2) values with tilted-axis cranked-shell model calculations based on the covariant density functional theory, and with semi-classical particle-rotor model calculations.

doi: 10.1103/PhysRevC.103.024324
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2021SH45      J.Phys.(London) G48, 123001 (2021)

j.A.Sheikh, J.Dobaczewski, P.Ring, L.M.Robledo, C.Yannouleas

Symmetry restoration in mean-field approaches

doi: 10.1088/1361-6471/ac288a
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2020BA32      J.Phys.(London) G47, 075103 (2020)

R.Bakshi, S.Gupta, S.Singh, A.Bharti, G.H.Bhat, J.A.Sheikh

Phenomenological description of non-axial shapes of some doubly even neutron deficient barium isotopes

NUCLEAR STRUCTURE 122,123,124,125,126,127,128,129,130,131,132Ba; calculated potential energy surfaces (PES) of ground state as a function of triaxiality parameter, B(E2), R4/2, bands, staggering parameter, kinematic moments of inertia. Comparison with available data.

doi: 10.1088/1361-6471/ab81dd
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2020JE04      Eur.Phys.J. A 56, 197 (2020)

S.Jehangir, I.Maqbool, G.H.Bhat, J.A.Sheikh, R.Palit, N.Rather

High-spin doublet band structures in odd-odd 194-200Tl isotopes

NUCLEAR STRUCTURE 194,196,198,200Tl; calculated energy levels, J, π, projected energies, before band mixing of negative parity states, staggering, B(E2), B(M1). Comparison with experimental values.

doi: 10.1140/epja/s10050-020-00206-9
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2020RA10      Phys.Rev. C 101, 064313 (2020)

P.Ray, H.Pai, S.Ali, A.Mukherjee, A.Goswami, S.Rajbanshi, S.Bhattacharya, R.Banik, S.Nandi, S.Bhattacharyya, G.Mukherjee, C.Bhattacharya, S.Chakraborty, G.Gangopadhyay, M.S.R.Laskar, R.Palit, G.H.Bhat, S.Jehangir, J.A.Sheikh, A.K.Sinha, S.Samanta, S.Das, S.Chatterjee, R.Raut, S.S.Ghugre

Quasi-γ band in 114Te

NUCLEAR REACTIONS 112Sn(α, 2n), E=37 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ)(DCO), γγ(linear polarization) using the INGA array for γ detection at VECC, Kolkata. 114Te; deduced levels, J, π, multipolarities, mixing ratios, quasi γ band, odd-even energy staggering in 114Te and 118Xe. Comparison with theoretical calculations using interacting boson model (IBM) and triaxial projected shell model (TPSM).

doi: 10.1103/PhysRevC.101.064313
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2020RA13      Chin.Phys.C 44, 094107 (2020)

V.Rani, P.Verma, S.Singh, M.Rajput, A.Bharti, G.H.Bhat, J.A.Sheikh

Systematic study of odd-mass 151-161Pm and 154, 156Pm isotopes using projected shell model

NUCLEAR STRUCTURE 151,153,155,157,159,161Pm, 154,156Pm; calculated yrast bands, B(E2), B(M1).

doi: 10.1088/1674-1137/44/9/094107
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2020SH27      Eur.Phys.J. Special Topics 229, 2555 (2020)

J.A.Sheikh, R.N.Ali

Symmetry projection in atomic nuclei

doi: 10.1140/epjst/e2020-000111-3
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2019AS06      Eur.Phys.J. A 55, 175 (2019)

Md.A.Asgar, G.Mukherjee, T.Roy, S.Nandi, G.H.Bhatt, J.A.Sheikh, R.Palit, S.Bhattacharyya, S.Bhattacharya, C.Bhattacharya, A.Dhal, T.K.Ghosh, A.Chaudhuri, K.Banerjee, S.Kundu, T.K.Rana, P.Roy, R.Pandey, S.Manna, J.K.Meena, S.Saha, S.Biswas, J.Sethi, P.Singh, D.Choudhury

Band structures in 169Tm and the structures of Tm isotopes around N=98

doi: 10.1140/epja/i2019-12882-3
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Data from this article have been entered in the XUNDL database. For more information, click here.


2019BA46      Phys.Rev. C 100, 054308 (2019)

F.S.Babra, R.Palit, S.Rajbanshi, S.Jehangir, B.Das, G.H.Bhat, J.A.Sheikh, S.Biswas, U.Garg, Md.S.R.Laskar, C.Palshetkar, S.Saha, J.Sethi, P.Singh

Investigation of a large change in deformation for the γ-soft nucleus 136Sm

NUCLEAR REACTIONS 107Ag(32S, 2np)136Sm, E=145 MeV; measured Eγ, Iγ, two and higher-fold γγ-coin, half-lives of levels in the ground band by DSAM using the INGA array at TIFR-Mumbai accelerator facility. 136Sm; deduced levels, J, π, yrast and γ bands, transitional quadrupole moments, configurations; calculated total Routhian surfaces, proton and neutron quasiparticle energies in the framework of the cranked shell model and the triaxial projected shell-model (TPSM).

doi: 10.1103/PhysRevC.100.054308
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Data from this article have been entered in the XUNDL database. For more information, click here.


2019BI06      Eur.Phys.J. A 55, 159 (2019)

S.Biswas, R.Palit, S.Frauendorf, U.Garg, W.Li, G.H.Bhat, J.A.Sheikh, J.Sethi, S.Saha, P.Singh, D.Choudhury, J.T.Matta, A.D.Ayangeakaa, W.A.Dar, V.Singh, S.Sihotra

Longitudinal wobbling in 133La

NUCLEAR REACTIONS 126Te(11B, 4n)133La, E=52 MeV; measured Eγ, Iγ(θ), γγ-coin, γγγ-coin using INGA (21 Compton suppressed HPGe coupled with digital data acquisition system); deduced 133La lower levels, J, π, γ transitions, angular distribution plots for pure 758, 874, 982 keV M1 transitions in coincidence with 445 keV transition, perpendicular and parallel spectra, a32-a4 contour plots, Direction Correlation from Oriented states (DCO) ratio spectra, B(E2)in, B(E2)out, B(M1)out γ-transitions strengths, mixing ratios, wobbling bands with nω=0 and 1 with interconnecting E2 transitions, increase of wobbling of frequency; calculated 133La angular distribution plots, a2-a4 contour plots, Direction Correlation from Oriented states (DCO) using Quasiparticle-Triaxial-Rotor (QTR) model with and without Harmonic Frozen Approximation (HFA) theory, Tilted Axis Cranking (TAC) model; deduced longitudinal wobbling for 133La. Data compared with recently published 133La study using 116Cd(22Ne, x) at Gammasphere.

doi: 10.1140/epja/i2019-12856-5
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Data from this article have been entered in the XUNDL database. For more information, click here.


2019CH28      Eur.Phys.J. A 55, 46 (2019)

S.Chakraborty, H.P.Sharma, S.S.Tiwary, C.Majumder, P.Banerjee, S.Ganguly, S.Muralithar, R.P.Singh, G.H.Bhat, J.A.Sheikh, R.Palit

γ-vibration in 198Hg

NUCLEAR REACTIONS 197Au(7Li, α2nγ), E=33, 38 MeV; measured Eγ, Iγ, γγ-coin using Indian Gamma Ray Array (INGA) of 15 Compton suppressed clover detector using Collection and Analysis of Nuclear Data using Linux nEtwork (CANDLE) CAMAC-based data acquisition system; calculated band structure using microscopic Triaxial Projected Shell Model (TPSM); deduced E(4+)/E(2+) ratio vs nuclear mass (isotopes of Hg, Pt, Os), γ-ray transitions, low-lying levels, J, π using Directional Correlation of Oriented states (DCO) ratios, linear polarization asymmetries.

doi: 10.1140/epja/i2019-12707-5
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2019PA47      Chin.Phys.C 43, 124108 (2019)

R.K.Pandit, R.K.Bhat, R.Devi, S.K.Khosa, G.H.Bhat, J.A.Sheikh

Microscopic study of electromagnetic properties and band spectra of neutron deficient 133, 135, 137Sm

NUCLEAR STRUCTURE 133,135,137Sm; calculated Nilsson diagrams, bands, energy levels, J, π, B(M1)/B(E2). Comparison with available data.

doi: 10.1088/1674-1137/43/12/124108
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2019SE06      Phys.Lett. B 792, 170 (2019), Erratum Phys.Lett. B 820, 136556 (2021)

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

Two-phonon wobbling in 135Pr

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

doi: 10.1016/j.physletb.2019.03.038
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2019SI37      Chin.J.Phys.(Taiwan) 62, 240 (2019)

S.Singh, S.Gupta, A.Gupta, A.Kumar, A.Bharti, G.H.Bhat, J.A.Sheikh

Microscopic insight into the quasi-particle structure of odd-mass terbium isotopes

NUCLEAR STRUCTURE 155,157,159,161,163Tb; calculated energy levels, J, π, yrast spectra, bands. Projected shell model, comparison with available data.

doi: 10.1016/j.cjph.2019.08.005
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2019TI07      Eur.Phys.J. A 55, 163 (2019)

S.S.Tiwary, H.P.Sharma, S.Chakraborty, C.Majumder, G.H.Bhat, J.A.Sheikh, P.Baneerjee, S.Ganguly, S.Rai, Pragati, Mayank, S.Kumar, A.Kumar, S.S.Bhattacharjee, R.P.Singh, S.Muralithar

Observation of quasi-γ bands in Te nuclei

NUCLEAR REACTIONS 122Sn(9Be, 3nα)124Te, E=48 MeV; measured Eγ, Iγ(θ), γγ-coin, γγγ-coin using INGA array (14 Compton suppressed HPGe clover detectors); deduced energy and intensity of coin using symmetric Eγ-Eγ γ-transitions, multiplicity using asymmetric Eγ-Eγ matrices and INGASORT and RADWARE codes, level energies; deduced, verified 124Te yrast band up to 4596 keV, other rotational bands, relative intensity of γ transitions, RDCO, polarization asymmetry.

doi: 10.1140/epja/i2019-12842-y
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Data from this article have been entered in the XUNDL database. For more information, click here.


2019VE02      Nucl.Phys. A986, 245 (2019)

P.Verma, S.Singh, A.Bharti, S.K.Khosa, G.H.Bhat, J.A.Sheikh

Microscopic insight into the nuclear structure properties of odd-mass 101-109Cd isotopes

NUCLEAR STRUCTURE 101,103,105,107,109Cd; calculated levels, energy, J, π, structure of states, rotational bands, yrast band, negative-parity yrast bands, B(E2), inertia moments using shell m Model (PSM). Compared with available data.

doi: 10.1016/j.nuclphysa.2019.03.013
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2018JE01      Phys.Rev. C 97, 014310 (2018)

S.Jehangir, G.H.Bhat, J.A.Sheikh, S.Frauendorf, S.N.T.Majola, P.A.Ganai, J.F.Sharpey-Schafer

Quasiparticle and γ-band structures in 156Dy

NUCLEAR STRUCTURE 156Dy; calculated levels, J, π, rotational bands, Routhians, B(E2), staggering parameter. Microscopic triaxial projected shell model (TPSM) approach and the quasiparticle random phase approximation (QRPA) based on the rotating mean field. Comparison with experimental data.

doi: 10.1103/PhysRevC.97.014310
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2018NA22      Nucl.Phys. A979, 1 (2018)

T.Naz, G.H.Bhat, S.Jehangir, S.Ahmad, J.A.Sheikh

Microscopic description of structural evolution in Pd, Xe, Ba, Nd, Sm, Gd and Dy isotopes

NUCLEAR STRUCTURE 96,98,100,102,104,106,108,110,112,114Pd, 128,130,132,134,136,138,140Xe, 126,128,130,132,134,136,138,140,142Ba, 142,144,146,148,150,152,154,156Nd, 144,146,148,150,152,154,156,158Sm, 146,148,150,152,154,156,158Gd, 148,150,152,154,156,158,160Dy; calculated Q, mass excess, potential energy surface vs quadrupole deformation, potential energy surface vs deformation in (β, nullg) plane using self-consistent Relativistic Hatree-Bogoliubov (RHB) formalism with DD-MM2 force supported by TPSM (TRiaxial Projected Shell Model).

doi: 10.1016/j.nuclphysa.2018.09.001
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2018SI05      Braz.J.Phys. 48, 85 (2018)

S.Singh, A.Kumar, D.Singh, C.Sharma, A.Bharti, G.H.Bhat, J.A.Sheikh

Projected Shell Model Description of Positive Parity Band of 130Pr Nucleus

NUCLEAR STRUCTURE 130Pr; calculated energy levels, J, π, B(E2), B(M1). Comparison with available data.

doi: 10.1007/s13538-017-0541-9
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2017FR03      Int.J.Mod.Phys. E26, 1750030 (2017)

H.Fryman-Sinkhorn, E.H.Wang, C.J.Zachary, J.H.Hamilton, A.V.Ramayya, G.H.Bhat, J.A.Sheikh, R.N.Ali, A.A.Wani, A.C.Dai, W.Y.Liang, F.R.Xu, J.K.Hwang, N.T.Brewer, Y.X.Luo, J.O.Rasmussen, S.J.Zhu, G.M.Ter-Akopian, Yu.Ts.Oganessian

Possible very anharmonic one- and two-phonon γ-vibrational bands in 103Mo

RADIOACTIVITY 252Cf(SF); measured decay products, Eγ, Iγ, γ-γ-coin. 103Mo; deduced γ-ray energies and intensities, J, π, γ-vibrational bands. Comparison with potential energy surface calculations.

doi: 10.1142/S0218301317500306
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Data from this article have been entered in the XUNDL database. For more information, click here.


2017GU02      Eur.Phys.J. A 53, 15 (2017)

A.Gupta, S.Singh, A.Bharti, S.K.Khosa, G.H.Bhat, J.A.Sheikh

Investigation of the structure of core-coupled odd-proton Copper nuclei in fpg valence space using the Projected Shell Model

NUCLEAR STRUCTURE 59,61,63,65,67,69Cu; calculated negative parity rotational bands, yrast band levels, J, π, inertia moment vs rotational frequency, B(E2), B(M1), probability amplitudes of projected K-configurations; deduced deformation, yrast band composition in terms of multi-quasiparticle configurations. Compared with available data.

doi: 10.1140/epja/i2017-12202-1
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2017JE03      Nucl.Phys. A968, 48 (2017)

S.Jehangir, G.H.Bhat, J.A.Sheikh, R.Palit, P.A.Ganai

Intrinsic properties of high-spin band structures in triaxial nuclei

NUCLEAR STRUCTURE 68,70Ge, 128,130,132,134Ce, 132,134,136,138Nd; calculated levels, J, π, g-factor, rotational and vibrational bands using TPSM (Triaxial Projected Shell Model). Compared with available data.

doi: 10.1016/j.nuclphysa.2017.08.001
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2017KU30      Eur.Phys.J. A 53, 200 (2017)

A.Kumar, D.Singh, S.Singh, A.Bharti, G.H.Bhat, J.A.Sheikh

Rotational structure of odd-proton 103, 105, 107, 109, 111Tc isotopes

NUCLEAR STRUCTURE 103,105,107,109,111Tc; calculated E(7/2)+* state, yrast band states energy, J, π with spin up to (59/2)+, moment of inertia, B(E2), B(M1), signature splitting function, probability amplitude of projected K-configurations using PSM (Projected Shell Model). Compared to data.

doi: 10.1140/epja/i2017-12391-5
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2017MA54      Phys.Rev. C 96, 034319 (2017), Erratum Phys.Rev. C 102, 029902 (2020)

J.Marcellino, E.H.Wang, C.J.Zachary, J.H.Hamilton, A.V.Ramayya, G.H.Bhat, J.A.Sheikh, A.C.Dai, W.Y.Liang, F.R.Xu, J.K.Hwang, N.T.Brewer, Y.X.Luo, J.O.Rasmussen, S.J.Zhu, G.M.Ter-Akopian, Yu.Ts.Oganessian

One- and two-phonon γ-vibrational bands in neutron-rich 107Mo

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-coin using Gammasphere array at LBNL, Berkeley. 107Mo; deduced levels, J, π, rotational and quasiparticle bands, triaxial deformation, configurations; calculated deformation from potential energy surface (PES) plot. Comparison with projected shell model calculations, and with systematics of levels in 103,104,105,106,107,108Mo.

doi: 10.1103/PhysRevC.96.034319
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Data from this article have been entered in the XUNDL database. For more information, click here.


2017NA04      Phys.Lett. B 767, 480 (2017)

A.Navin, M.Rejmund, S.Bhattacharyya, R.Palit, G.H.Bhat, J.A.Sheikh, A.Lemasson, S.Bhattacharya, M.Caamano, E.Clement, O.Delaune, F.Farget, G.de France, B.Jacquot

Evolution of triaxial shapes at large isospin: Rh isotopes

NUCLEAR REACTIONS 9Be(238U, X)114Rh/115Rh/116Rh/117Rh/118Rh/119Rh, E=6.2 MeV/nucleon; measured reaction products, Eγ, Iγ; deduced level energies, J, π, energy signature splitting. Comparison with the Triaxial Projected Shell Model (TPSM) calculations.

doi: 10.1016/j.physletb.2016.11.020
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Data from this article have been entered in the XUNDL database. For more information, click here.


2017PA13      Eur.Phys.J. A 53, 90 (2017)

R.Palit, G.H.Bhat, J.A.Sheikh

Structure and symmetries of odd-odd triaxial nuclei

COMPILATION 104,106,108,110,112,114,116Rh, 104,106,108,110,112,114,116Ag; compiled calculations and data on levels, J, π, B(M1), B(E2), yrast and yrare bands, signature splitting vs spin for different values of triaxial deformation parameter. Calculations done within TPSM (Triaxial Projected Shell Model).

doi: 10.1140/epja/i2017-12272-y
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2017PA44      Eur.Phys.J. A 53, 201 (2017)

R.K.Pandit, R.Devi, S.K.Khosa, G.H.Bhat, J.A.Sheikh

A systematic study of band structure and electromagnetic properties of neutron rich odd mass Eu isotopes in the projected shell model framework

NUCLEAR STRUCTURE 153,155,157,159Eu; calculated levels, J, π, rotational bands, B(E2), B(M1); deduced change of deformation with increasing angular momentum. Compared with data.

doi: 10.1140/epja/i2017-12393-3
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2017SI13      Int.J.Mod.Phys. E26, 1750041 (2017)

D.Singh, A.Bharti, A.Kumar, S.Singh, G.H.Bhat, J.A.Sheikh

Study of odd mass 115-125Sb isotopes with the projected shell model calculations

NUCLEAR STRUCTURE 115,117,119,121,123,125Sb; calculated energies, J, π, kinetic moment of inertia, B(E2), B(M1). Comparison with experimental results.

doi: 10.1142/S0218301317500410
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2017SI14      Phys.Rev. C 95, 064312 (2017)

V.Singh, S.Sihotra, G.H.Bhat, J.A.Sheikh, M.Kaur, S.Kumar, K.Singh, J.Goswamy, S.Saha, J.Sethi, R.Palit, S.S.Malik, N.Singh, U.Garg, D.Mehta

Band structures in 101Pd

NUCLEAR REACTIONS 75As(31P, 3n2p), E=125 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ)(DCO), γγ(linear polarization), DSAM half-life analysis for some of the levels in band B3 using INGA array of 21 clover Ge detectors at Pelletron-LINAC facility of TIFR-Mumbai. 101Pd; deduced high-spin levels, J, π, bands, multipolarities, mixing ratios, alignments, experimental Routhians, configurations, anti-magnetic rotational band. Comparison with projected shell model, and hybrid version of tilted-axis cranking shell model calculations. Comparison with structure of 99Pd.

doi: 10.1103/PhysRevC.95.064312
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Data from this article have been entered in the XUNDL database. For more information, click here.


2016BH01      Nucl.Phys. A947, 127 (2016)

G.H.Bhat, J.A.Sheikh, Y.Sun, R.Palit

Unified description of rotational-, γ-, and quasiparticle-band structures in neutron-rich mass ∼ 110 region

NUCLEAR STRUCTURE 102,103,104,105,106,107,108Mo, 108,109,110,111,112Ru; calculated yrast, γ-, γγ-bands, quadrupole moment. 103,105,107Mo, 109,111Ru calculated B(E2) for many transitions. 102,105Mo calculated rotational bands, other bands. TPSM (Tri-axial Projected Shell Model) calculations with multi-quasiparticle configurations; compared to published data.

doi: 10.1016/j.nuclphysa.2015.12.006
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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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Data from this article have been entered in the XUNDL database. For more information, click here.


2016SE01      J.Phys.(London) G43, 015103 (2016)

J.Sethi, R.Palit, J.J.Carroll, S.Karamian, S.Saha, S.Biswas, Z.Naik, T.Trivedi, M.S.Litz, P.Datta, S.Chattopadhyay, R.Donthi, U.Garg, S.Jadhav, H.C.Jain, S.Kumar, D.Mehta, B.S.Naidu, G.H.Bhat, J.A.Sheikh, S.Sihotra, P.M.Walker

Low-lying states near the Iπ = 6+ isomer in 108Ag

NUCLEAR REACTIONS 100Mo(11B, 3n), E=39 MeV; measured reaction products, Eγ, Iγ, γ-γ-coinc.; deduced σ(θ), σ, energy levels, J, π, γ-ray intensities. Comparison with projected Hartree-Fock calculations.

doi: 10.1088/0954-3899/43/1/015103
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Data from this article have been entered in the XUNDL database. For more information, click here.


2016SH38      Phys.Scr. 91, 063015 (2016)

J.A.Sheikh, G.H.Bhat, W.A.Dar, S.Jehangir, P.A.Ganai

Microscopic nuclear structure models and methods: chiral symmetry, wobbling motion and γ-bands

NUCLEAR STRUCTURE 68Ge, 103,105Rh, 124,126,128,130,132Cs, 132,134Ce, 135Pr, 134,136,138Nd, 154,156,158,160,162,164Dy, 180Hf, 180Hg, 238U; calculated rotational bands, levels, J, π, B(E2) using TPSM (Triaxial Projected Shell Model) with both axial and nonaxial deformation. Compared with available data.

doi: 10.1088/0031-8949/91/6/063015
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2016SI13      Nucl.Phys. A952, 41 (2016)

D.Singh, A.Gupta, A.Kumar, C.Sharma, S.Singh, A.Bharti, S.K.Khosa, G.H.Bhat, J.A.Sheikh

Study of nuclear structure of odd mass 119-127I nuclei in a phenomenological approach

NUCLEAR STRUCTURE 119,121,123,125,127I; calculated positive and negative parity rotational levels, J, π, rotational bands, yrast bands, backbending, B(E2), B(M1) using PSM (Projected Shell Model) phenomenological approach with deformed sp states. Compared with (few) available data.

doi: 10.1016/j.nuclphysa.2016.04.014
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2016SI23      Phys.Rev. C 94, 044320 (2016)

V.Singh, S.Sihotra, S.S.Malik, G.H.Bhat, R.Palit, J.A.Sheikh, S.Kumar, N.Singh, K.Singh, J.Goswamy, J.Sethi, S.Saha, T.Trivedi, D.Mehta

Structure of dipole bands in doubly odd 102Ag

NUCLEAR REACTIONS 75As(31P, 3np), E=125 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ)(DCO), γγ(lin pol), level lifetimes by DSAM using the INGA array at TIFR-BARC Pelletron Linac facility. 102Ag; deduced high-spin levels, J, π, multipolarities, bands, alignments, moment of inertia plots, Routhian plots, B(M1), B(E2), B(M1)/B(E2) ratios, configurations, staggering parameter. Comparison with tilted-axis cranking (TAC) model calculations. Systematics of band structures, B(M1)/B(E2) ratios, configurations, alignment plots and staggering parameters in 102,104,106,108Ag.

doi: 10.1103/PhysRevC.94.044320
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Data from this article have been entered in the XUNDL database. For more information, click here.


2015DA01      Nucl.Phys. A933, 123 (2015)

W.A.Dar, J.A.Sheikh, G.H.Bhat, R.Palit, R.N.Ali, S.Frauendorf

Microscopic study of doublet bands in odd-odd A ∼ 100 nuclei

NUCLEAR STRUCTURE 98,100Tc, 104,106Rh, 104,106Ag; calculated negative parity yrast band, energy, J, π, B(M1), B(E2), deformation, triaxial deformation using microscopic triaxial projected shell model. Compared with data.

doi: 10.1016/j.nuclphysa.2014.10.045
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2015GU18      Nucl.Phys. A941, 48 (2015)

A.Gupta, P.Verma, S.Singh, A.Bharti, S.K.Khosa, G.H.Bhat, J.A.Sheikh

Quasi-particle structure of proton-hole cobalt isotopes

NUCLEAR STRUCTURE 57,59,61,63,65,67Co; calculated shell evolution, rotational alignment, multi-particle structure of states, band crossing, negative-parity yrast band, high spin states, B(E2), B(M1) using projected shell model. Compared with available data.

doi: 10.1016/j.nuclphysa.2015.05.008
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2015KU25      Int.J.Mod.Phys. E24, 1550076 (2015)

A.Kumar, S.Singh, S.K.Khosa, A.Bharti, G.H.Bhat, J.A.Sheikh

Theoretical study of neutron-rich 107, 109, 111, 113Rh isotopes

NUCLEAR STRUCTURE 107,109,111,113Rh; calculated quadrupole and hexadecapole deformation parameters, band diagrams, positive-parity yrast band energies, B(E2). Comparison with experimental data.

doi: 10.1142/S0218301315500767
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2015RA02      Phys.Rev. C 91, 024319 (2015)

M.K.Raju, D.Negi, S.Muralithar, R.P.Singh, J.A.Sheikh, G.H.Bhat, R.Kumar, I.Bala, T.Trivedi, A.Dhal, K.Rani, R.Gurjar, D.Singh, R.Palit, B.S.Naidu, S.Saha, J.Sethi, R.Donthi, S.Jadhav

High spin spectroscopy and shape evolution in 105Cd

NUCLEAR REACTIONS 92Mo(16O, n2p), E=75 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ)(DCO), γγ(linear pol) using INGA array at TIFR-14UD Pelletron accelerator facility. 105Cd; deduced high-spin levels, J, π, multipolarity, bands, configurations, alignments. Comparison with triaxial projected shell model (TPSM), cranked shell model (CSM), and total Routhian surface (TRS) calculations. Systematics of level energies for νh11/2 bands in 103,105,107,109Cd.

doi: 10.1103/PhysRevC.91.024319
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2015SA13      Acta Phys.Pol. B46, 575 (2015)

J.Sadhukhan, K.Mazurek, J.Dobaczewski, W.Nazarewicz, J.A.Sheikh, A.Baran

Multidimensional Skyrme-density-functional Study of the Spontaneous Fission of 238U

RADIOACTIVITY 238U(SF); calculated T1/2, potential energy surfaces, quadrupole diagonal inertia. Microscopic input based on the ATDHFB approach.

doi: 10.5506/APhysPolB.46.575
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2015SE06      Acta Phys.Pol. B46, 703 (2015)

J.Sethi, R.Palit, J.J.Carroll, S.Karamian, S.Saha, S.Biswas, Z.Naik, T.Trivedi, M.S.Litz, P.Datta, S.Chattopadhyay, R.Donthi, U.Garg, S.Jadhav, H.C.Jain, S.Kumar, D.Mehta, B.S.Naidu, G.H.Bhat, J.A.Sheikh, S.Sihotra, P.M.Walker

Spectroscopy of the Low-lying States Near the High Spin Isomer in 108Ag

NUCLEAR REACTIONS 100Mo(11B, 3n), E=39 MeV; measured reaction products, Eγ, Iγ; deduced energy levels, J, π, γ-ray intensities, branching ratios.

doi: 10.5506/APhysPolB.46.703
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2015ZH33      Phys.Rev. C 92, 034307 (2015)

C.L.Zhang, G.H.Bhat, W.Nazarewicz, J.A.Sheikh, Y.Shi

Theoretical study of triaxial shapes of neutron-rich Mo and Ru nuclei

NUCLEAR STRUCTURE 106,108Mo, 108,110,112Ru; calculated levels, J, π, moments of inertia, shapes, and transition quadrupole moments, potential energy surfaces (PES) in (Q20, Q22) plane, Routhians, alignments for high-spin bands, equilibrium deformation plots, ground, γ and γγ bands. Triaxial shape deformations. Nuclear density functional theory (DFT) with the optimized energy density functional UNEDF0, and triaxial projected shell model (TPSM). Comparison with experimental data.

doi: 10.1103/PhysRevC.92.034307
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2014BH01      Nucl.Phys. A922, 150 (2014)

G.H.Bhat, R.N.Ali, J.A.Sheikh, R.Palit

Investigation of doublet-bands in 124, 126, 130, 132Cs odd-odd nuclei using triaxial projected shell model approach

NUCLEAR STRUCTURE 124,126,130,132Cs; calculated rotational bands, triaxial quasiparticle state contribution, B(E2), B(M1) using multi-quasiparticle microscopic triaxial projected shell model (TPSM) approach. Compared to available data.

doi: 10.1016/j.nuclphysa.2013.12.006
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2014BH02      Phys.Rev. C 89, 014328 (2014)

G.H.Bhat, W.A.Dar, J.A.Sheikh, Y.Sun

Nature of γ deformation in Ge and Se nuclei and the triaxial projected shell model description

NUCLEAR STRUCTURE 76Ge; calculated levels, J, π of yrast band, γ band, and 2γ band, level and Eγ versus spin plots for bands, staggering parameter S(I) for γ band, B(E2) values for yrast band. 70,72,74,78,80Ge, 76,78,80,82Se; calculated band energies, staggering parameter, B(E2), Eγ versus spin plots for bands. Multi-quasiparticle triaxial projected shell model (TPSM) calculations. Comparison with spherical shell-model (SSM) calculations, and with experimental data.

doi: 10.1103/PhysRevC.89.014328
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2014MC09      Phys.Rev. C 90, 021302 (2014)

J.D.McDonnell, W.Nazarewicz, J.A.Sheikh, A.Staszczak, M.Warda

Excitation-energy dependence of fission in the mercury region

NUCLEAR STRUCTURE 174,180,198Hg, 196,210Po; calculated ground-state potential-energy surfaces in (Q20, Q30) plane, total shell correction energies along the symmetric and asymmetric fission pathways, potential-energy curves as function of excitation energy, fission pathways. Finite-temperature superfluid nuclear density functional theory (FT-DFT) with Skyrme energy density functional SkM* and a density-dependent pairing interaction. Role of shell structure of pre-scission configurations in transition from asymmetric fission in proton-rich nuclei to a more symmetric fission in heavier isotope.

doi: 10.1103/PhysRevC.90.021302
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2014RA10      Phys.Rev.Lett. 112, 202503 (2014)

N.Rather, P.Datta, S.Chattopadhyay, S.Rajbanshi, A.Goswami, G.H.Bhat, J.A.Sheikh, S.Roy, R.Palit, S.Pal, S.Saha, J.Sethi, S.Biswas, P.Singh, H.C.Jain

Exploring the Origin of Nearly Degenerate Doublet Bands in 106Ag

NUCLEAR REACTIONS 96Zr(14N, 4n), E=68 MeV; measured reaction products, Eγ, Iγ, γ-γ-coin.; deduced bands, level scheme, J, π, lifetimes, B(E2), B(M1), mixing and branching ratios. Comparison with available data and systematics.

doi: 10.1103/PhysRevLett.112.202503
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2014SA68      Phys.Rev. C 90, 061304 (2014)

J.Sadhukhan, J.Dobaczewski, W.Nazarewicz, J.A.Sheikh, A.Baran

Pairing-induced speedup of nuclear spontaneous fission

RADIOACTIVITY 240Pu, 264Fm(SF); calculated dynamic fission trajectories fission paths, collective inertia tensor. Superfluid nuclear density functional theory with the Skyrme energy density functional SkM* and a density-dependent pairing interaction. Strong effect of nucleonic pairing correlations on minimum-action fission path.

doi: 10.1103/PhysRevC.90.061304
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2014SH11      Phys.Rev. C 89, 054317 (2014)

J.A.Sheikh, N.Hinohara, J.Dobaczewski, T.Nakatsukasa, W.Nazarewicz, K.Sato

Isospin-invariant Skyrme energy-density-functional approach with axial symmetry

NUCLEAR STRUCTURE A=78, 48, 40; calculated total Hartree-Fock (HF) energy, single-particle energies and Routhians with and without isospin-symmetry-breaking Coulomb term, neutron and proton rms radii for isobaric analog chains. 78Ni, 78Zn, 78Ge, 78Se, 78Kr, 78Sr, 78Zr, 78Mo, 78Ru, 78Pd, 78Cd, 78Sn; calculated g9/2 proton effective HF potential, rms radii, single-particle energies. binding energy. Extension of existing axial DFT solver HFBTHO to isospin-invariant Skyrme EDF approach with all possible p-n (isospin) mixing terms. Comparison between HFODD and HFBTHO results.

doi: 10.1103/PhysRevC.89.054317
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2013CH02      J.Phys.(London) G40, 015101 (2013)

F.-Q.Chen, Y.Sun, P.M.Walker, G.D.Dracoulis, Y.R.Shimizu, J.A.Sheikh

Mixing effects on K-forbidden transition rates from the 6+ isomers in the N = 104 isotones

RADIOACTIVITY 172Er, 174Yb, 176Hf, 178W(IT); calculated B(E2) values for transitions from 6+ isomers, deformation parameters, transition rates, level energies, J, π, matrix elements. PSM calculations, comparison with experimental data.

doi: 10.1088/0954-3899/40/1/015101
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2013MC05      Phys.Rev. C 87, 054327 (2013)

J.D.McDonnell, W.Nazarewicz, J.A.Sheikh

Third minima in thorium and uranium isotopes in a self-consistent theory

NUCLEAR STRUCTURE 226,228,230,232Th, 228,230,232,234U; calculated isentropic potential energy surfaces in Q20-Q30 plane, potential energy curves, third minima, dimolecular configurations, total shell energies, nuclear density contours together with those of fragments 96,100Zr, 96,100Mo and 132Sn. Self-consistent finite-temperature (FT) superfluid nuclear density functional theory (DFT) using SkM* and UNEDF1. Discussed hyperdeformed fission isomers.

doi: 10.1103/PhysRevC.87.054327
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2013SA62      Phys.Rev. C 88, 064314 (2013)

J.Sadhukhan, K.Mazurek, A.Baran, J.Dobaczewski, W.Nazarewicz, J.A.Sheikh

Spontaneous fission lifetimes from the minimization of self-consistent collective action

RADIOACTIVITY 264Fm(SF); calculated square-root determinants of inertia tensors, energy-weighted moment tensors, single neutron and proton energies, static and dynamic paths as function of quadrupole and triaxial deformations, half-lives for different spontaneous fission paths. Skyrme energy density functional and density-dependent pairing interaction. Comparison with static result obtained with the minimum-energy pathways. Strong dynamical effects predicted.

doi: 10.1103/PhysRevC.88.064314
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2013SE12      Phys.Lett. B 725, 85 (2013)

J.Sethi, R.Palit, S.Saha, T.Trivedi, G.H.Bhat, J.A.Sheikh, P.Datta, J.J.Carroll, S.Chattopadhyay, R.Donthi, U.Garg, S.Jadhav, H.C.Jain, S.Karamian, S.Kumar, M.S.Litz, D.Mehta, B.S.Naidu, Z.Naik, S.Sihotra, P.M.Walker

Structure of nearly degenerate dipole bands in 108Ag

NUCLEAR REACTIONS 100Mo(11B, 3n), E=39 MeV; measured reaction products, Eγ, Iγ, γ-γ-coin.; deduced level energies, J, π, B(M1), B(M1)/B(E2), high spin negative parity states. Comparison with microscopic triaxial projected shell model approach calculations.

doi: 10.1016/j.physletb.2013.06.054
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2013VE10      Nucl.Phys. A918, 1 (2013)

P.Verma, C.Sharma, S.Singh, A.Bharti, S.K.Khosa, G.H.Bhat, J.A.Sheikh

Projected shell model study of quasiparticle structure of arsenic isotopes

NUCLEAR STRUCTURE 67,69,71,73,75,77,79As; calculated yrast states, shell evolution, rotational alignments, B(E2) vs J using projected shell model with deformed single-particle states from the Nilsson potential.

doi: 10.1016/j.nuclphysa.2013.09.005
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2012BH11      Phys.Rev. C 86, 047307 (2012)

G.H.Bhat, J.A.Sheikh, Y.Sun, U.Garg

Triaxial projected shell model study of the rapid changes in B(E2) for 180-190Pt isotopes

NUCLEAR STRUCTURE 180,182,184,186,188,190Pt; calculated projected energy surfaces, levels, J, π, yrast bands, γ bands, 2-qp bands, B(E2). Triaxial projected shell model approach (TPSM). Comparison with experimental data.

doi: 10.1103/PhysRevC.86.047307
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2011BA45      Phys.Rev. C 84, 054321 (2011)

A.Baran, J.A.Sheikh, J.Dobaczewski, W.Nazarewicz, A.Staszczak

Quadrupole collective inertia in nuclear fission: Cranking approximation

NUCLEAR STRUCTURE 256Fm; calculated total energy, proton, neutron and pairing energies, particle-hole energy, quadrupole mass parameter, quadrupole moment. One-dimensional quadrupole fission pathways. Cranking approximation to the adiabatic time-dependent Hartree-Fock-Bogoliubov (ATDHFB) approach. Comparison with Gaussian overlap approximation.

doi: 10.1103/PhysRevC.84.054321
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2011MA08      J.Phys.(London) G38, 045101 (2011)

I.Maqbool, J.A.Sheikh, P.A.Ganai, P.Ring

Particle-number-projected Hartree-Fock-Bogoliubov study with effective shell model interactions

NUCLEAR STRUCTURE 20,22,24,26,28Ne, 24Mg, 28Si, 32S, 36Ar, 44,46,48,50,52Cr; calculated energy surfaces, quadrupole moments, pairing gaps. Hartree-Fock-Bogoliubov method using GXPF1A effective interaction.

doi: 10.1088/0954-3899/38/4/045101
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2011SH38      Phys.Rev. C 84, 054314 (2011)

J.A.Sheikh, G.H.Bhat, Y.-X.Liu, F.-Q.Chen, Y.Sun

Mixing of quasiparticle excitations and γ vibrations in transitional nuclei

NUCLEAR STRUCTURE 166,168,170,172Er; calculated levels, J, π, bands, B(E2) values. Quasiparticle excitations with γ vibration in transitional nuclei. Multiquasiparticle triaxial projected shell model approach. Comparison with experimental data.

doi: 10.1103/PhysRevC.84.054314
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2011YE03      Phys.Rev. C 83, 054317 (2011)

E.Y.Yeoh, S.J.Zhu, J.H.Hamilton, K.Li, A.V.Ramayya, Y.X.Liu, J.K.Hwang, S.H.Liu, J.G.Wang, Y.Sun, J.A.Sheikh, G.H.Bhat, Y.X.Luo, J.O.Rasmussen, I.Y.Lee, H.B.Ding, L.Gu, Q.Xu, Z.G.Xiao, W.C.Ma

High-spin structure and multiphonon γ vibrations in very neutron-rich 114Ru

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-coin using Gammasphere array. 114Ru; deduced levels, J, π, bands, alignments. Systematics of level energies for 108,110,112,114Ru nuclei. Calculated Routhians using cranked-shell model with triaxial deformation parameters. Triaxial projected shell-model calculations for γ-vibrational band.

doi: 10.1103/PhysRevC.83.054317
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2010PE08      Nucl.Phys. A834, 381c (2010)

J.C.Pei, W.Nazarewicz, J.A.Sheikh, A.K.Kerman

Fission barriers and neutron gas in compound superheavy nuclei

NUCLEAR STRUCTURE 278Cn, 292Fl; calculated fission barriers, related features using the finite-temperature Hartree-Fock-Bogoliubov method.

doi: 10.1016/j.nuclphysa.2010.01.045
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2010TR05      Nucl.Phys. A834, 72c (2010)

T.Trivedi, R.Palit, D.Negi, Z.Naik, Y.-C.Yang, Y.Sun, J.A.Sheikh, A.Dhal, M.K.Raju, S.Appannababu, S.Kumar, D.Choudhury, K.Maurya, G.Mahanto, R.Kumar, R.P.Singh, S.Muralithar, A.K.Jain, H.C.Jain, S.C.Pancholi, R.K.Bhowmik, I.Mehrotra

Lifetime measurement of high spin states in 75Kr

NUCLEAR REACTIONS 50Cr(28Si, n2p), E=90 MeV; measured Eγ, Iγ(θ, t); deduced T1/2, transitional quadrupole moment. Comparison with nearby nuclei.

doi: 10.1016/j.nuclphysa.2010.01.021
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2010YA13      Int.J.Mod.Phys. E19, 1754 (2010)

Y-C.Yang, Y.Sun, T.Trivedi, R.Palit, J.A.Sheikh

Shape evolution of highly deformed 75Kr and projected shell model description

NUCLEAR STRUCTURE 75Kr; calculated transitional quadrupole moments, bands, high-spin states. Projected shell model, comparison with experimental data.

doi: 10.1142/S0218301310016181
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2009BA35      Int.J.Mod.Phys. E18, 1049 (2009)

A.Baran, J.A.Sheikh, A.Staszczak, W.Nazarewicz

Fission quadrupole mass parameters in HF+BCS and HFB methods

NUCLEAR STRUCTURE 252Fm; calculated mass dependent on quadrupole moment using self-consistent Hartree-Fock+BCS and Hartree-Fock-Bogoliubov method for large deformations.

doi: 10.1142/S0218301309013221
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2009BA36      Int.J.Mod.Phys. E18, 1054 (2009)

A.Baran, J.A.Sheikh, W.Nazarewicz

Adiabatic mass parameters for spontaneous fission

NUCLEAR STRUCTURE 252Fm; calculated mass excess, mass parameter dependent on quadrupole moment using different approaches.

doi: 10.1142/S0218301309013233
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2009GA35      Pramana 73, 839 (2009)

P.A.Ganai, J.A.Sheikh, I.Maqbool, R.P.Singh

Temperature and angular momentum dependence of the quadrupole deformation in sd-shell

NUCLEAR STRUCTURE 27,28Si; calculated quadrupole moments and angular momentum dependence of the quadrupole deformation as a function of temperature. Shell model, universal s-d (USD) interaction.

doi: 10.1007/s12043-009-0152-2
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2009PE10      Phys.Rev.Lett. 102, 192501 (2009)

J.C.Pei, W.Nazarewicz, J.A.Sheikh, A.K.Kerman

Fission Barriers of Compound Superheavy Nuclei

NUCLEAR STRUCTURE 264Fm, 272Ds, 278Cn, 292Fl, 312124; calculated isentropic fission barriers. Self-consistent nuclear density functional theory.

doi: 10.1103/PhysRevLett.102.192501
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2009SH24      Nucl.Phys. A824, 58 (2009)

J.A.Sheikh, G.H.Bhat, R.Palit, Z.Naik, Y.Sun

Multi-quasiparticle γ-band structure in neutron-deficient Ce and Nd isotopes

NUCLEAR STRUCTURE 128,130,132,134Ce, 132,134,136,138Nd; calculated γ-vibrational, yrast and 2γ band level energies using triaxial projected shell model. Comparison with data.

doi: 10.1016/j.nuclphysa.2009.04.002
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2009SH26      Phys.Rev. C 80, 011302 (2009)

J.A.Sheikh, W.Nazarewicz, J.C.Pei

Systematic study of fission barriers of excited superheavy nuclei

NUCLEAR STRUCTURE Z=110-124, N=166-188; calculated thermal fission barriers of superheavy nuclei as a function of excitation energy and inverse barrier damping parameters based on the FT-HF+BCS extension of the solver HFODD. 240Pu, 256Fm; calculated quenching of triaxial and reflection asymmetric deformations with excitation energy and fission pathways. Finite-temperature Self-consistent Hartree-Fock + Bardeen-Cooper-Scheiffer (FT-HF+BCS) calculations.

doi: 10.1103/PhysRevC.80.011302
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2009TR07      Phys.Rev. C 80, 047302 (2009); Publishers Note, Phys.Rev. C 80, 059902 (2009)

T.Trivedi, R.Palit, D.Negi, Z.Naik, Y.-C.Yang, Y.Sun, J.A.Sheikh, A.Dhal, M.K.Raju, S.Appannababu, S.Kumar, D.Choudhury, K.Maurya, G.Mahanto, R.Kumar, R.P.Singh, S.Muralithar, A.K.Jain, H.C.Jain, S.C.Pancholi, R.K.Bhowmik, I.Mehrotra

Shape evolution of the highly deformed 75Kr nucleus examined with the Doppler-shift attenuation method

NUCLEAR REACTIONS 50Cr(28Si, n2p), E=90 MeV; measured Eγ, Iγ, γγ-coin, and half-lives by Doppler-shift attenuation method. 75Kr; deduced levels, J, π, bands, B(E2), transitional quadrupole moments, and configurations. Comparison with projected shell model calculations.

doi: 10.1103/PhysRevC.80.047302
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2008DA12      Phys.Rev. C 78, 021306 (2008)

P.Datta, S.Roy, S.Pal, S.Chattopadhyay, S.Bhattacharya, A.Goswami, M.S.Sarkar, J.A.Sheikh, Y.Sun, P.V.Madhusudhana Rao, R.K.Bhowmik, R.Kumar, N.Madhavan, S.Muralithar, R.P.Singh, H.C.Jain, P.K.Joshi, Amita

Abrupt change of rotation axis in 109Ag

NUCLEAR REACTIONS 100Mo(13C, 3np), E=65 MeV; measured Eγ, Iγ, γγ-coin. 109Ag; deduced levels, J, π, half-lives by DSAM, B(M1), B(E2). Comparisons with projected shell-model and tilted-axis cranking calculations.

doi: 10.1103/PhysRevC.78.021306
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2008SH01      Phys.Rev. C 77, 014303 (2008)

J.A.Sheikh, P.A.Ganai, R.P.Singh, R.K.Bhowmik, S.Frauendorf

Shell model study of pairing correlations

NUCLEAR STRUCTURE 24Ne, 26Al, 27,28Si; calculated pairing correlations as a function of temperature and angular momentum. Shell model.

doi: 10.1103/PhysRevC.77.014303
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2008SH09      Phys.Rev. C 77, 034313 (2008)

J.A.Sheikh, G.H.Bhat, Y.Sun, G.B.Vakil, R.Palit

Triaxial projected shell model study of γ-vibrational bands in even-even Er isotopes

NUCLEAR STRUCTURE 156,158,160,162,164,166,168,170Er; calculated γ-vibrational bands, yrast bands, 2γ bands, wave function decompositions using triaxial projected shell model. Comparisons with experimental data.

doi: 10.1103/PhysRevC.77.034313
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2008SU07      Phys.Rev. C 77, 044307 (2008)

Y.Sun, G.-L.Long, F.Al-Khudair, J.A.Sheikh

γ-vibrational states in superheavy nuclei

NUCLEAR STRUCTURE 250,252,254,256Fm, 252,254,256,258No, 270Ds; calculated levels, B(E2), ground state and γ-vibrational bands. Microscopic Triaxial Projected shell model. Comparison with experimental data.

doi: 10.1103/PhysRevC.77.044307
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2007AH04      Phys.Rev. C 75, 054315 (2007)

P.Ahmad Dar, R.Devi, S.K.Khosa, J.A.Sheikh

Microscopic study of yrast band structures in 66-72Ge isotopes

NUCLEAR STRUCTURE 66,68,70,72Ge; calculated level energies, B(E2) and g-factors for high spin states using projected shell model approach.

doi: 10.1103/PhysRevC.75.054315
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