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NSR database version of May 20, 2024.

Search: Author = S.Jehangir

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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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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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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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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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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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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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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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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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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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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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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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