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NSR database version of May 22, 2024.

Search: Author = M.S.Laskar

Found 22 matches.

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2024DE08      Phys.Rev. C 109, 034313 (2024)

P.Dey, R.Palit, P.C.Srivastava, B.Das, A.Kundu, Md.S.R.Laskar, V.Malik, D.Negi, Sh.Sharma

Experimental investigation of high-spin states in 91Nb

doi: 10.1103/PhysRevC.109.034313
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2024PA07      Phys.Rev. C 109, 014610 (2024)

V.V.Parkar, M.Prasanna, R.Rathod, V.Jha, S.K.Pandit, A.Shrivastava, K.Mahata, K.Ramachandran, R.Palit, Md.S.R.Laskar, B.J.Roy, Bh.Kanagalekar, B.G.Hegde

Fusion of 7Li with 205Tl at near-barrier energies

doi: 10.1103/PhysRevC.109.014610
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2023CH08      Phys.Rev. C 107, 024312 (2023)

S.Chatterjee, B.Mondal, S.Samanta, S.Das, R.Raut, S.S.Ghugre, P.C.Srivastava, A.K.Sinha, U.Garg, Neelam, N.Kumar, P.Jones, Md.S.R.Laskar, F.S.Babra, S.Biswas, S.Saha, P.Singh, R.Palit

Single-particle configurations of low- and medium-spin states in 63Cu

NUCLEAR REACTIONS 59Co(7Li, 2np), E=22-24 MeV; measured Eγ, Iγ, γγ-coin, γγγ-coin, γγ(θ). 63Cu; deduced levels, J, π, δ, transition intensities, branching ratios, ratio of angular distribution from oriented (ADO) nuclei, polarization asymmetry, high-spin states, configurations; calculated average occupancies of neutron and proton orbitals. Comparison to shell model calculations using the jj44bpn and pfg9a interactions. Array of 10 Compton suppressed HPGe clover detectors at 14 UD Pelletron at the Pelletron LINAC Facility in Tata Institute of Fundamental Research (TIFR, India).

doi: 10.1103/PhysRevC.107.024312
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2023SA26      Phys.Rev. C 107, 064611 (2023)

R.Santra, B.Dey, S.Roy, R.Palit, Md.S.R.Laskar, H.Pai, S.Rajbanshi, S.Ali, S.Bhattacharjee, F.S.Babra, A.Mukherjee, S.Jadhav, B.S.Naidu, A.T.Vazhappilly, S.Pal

Collective enhancement in nuclear level density of 72Ga and 71Ga from γ-gated proton spectra

NUCLEAR REACTIONS 64Ni(9Be, np), (9Be, 2np), E=30 MeV; measured Ep, Ip, Eγ, Iγ, pγ-coin; deduced reaction yields proton yields from compound nuclei. 71,72Ga; deduced nuclear level density (NLD), rotational enhancement factor. Comparison to statistical model calculations. CsI(Tl) detector array (proton detection) combined with 14 Compton-suppressed Clover detectors (γ detection) at BARC-TIFR Pelletron Linac Facility (Mumbai).

doi: 10.1103/PhysRevC.107.064611
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2022DE09      Phys.Rev. C 105, 044307 (2022)

P.Dey, D.Negi, R.Palit, P.C.Srivastava, Md.S.R.Laskar, B.Das, F.S.Babra, S.Bhattacharya, B.Das, K.Rojeeta Devi, R.Gala, U.Garg, S.S.Ghugre, E.Ideguchi, S.Kumar, A.Kundu, G.Mukherjee, S.Muralithar, S.Nag, S.Nandi, Neelam, M.K.Raja, R.Raut, R.Santra, A.Sharma, S.Sihotra, A.K.Singh, R.P.Singh, T.Trivedi

Experimental investigation of high-spin states in 90Zr

NUCLEAR REACTIONS 82Se(13C, 5n), E=60 MeV; measured Eγ, Iγ, γγγ-coin, γ(θ). 90Zr; deduced levels, J, π, DCO ratios, polarization asymmetry, multipolarity, high-spin states, bands structure, configurations. Comparison to shell-model calculations with the GWBXG effective interaction. Indian National Gamma Array (INGA) at TIFR-BARC Pelletron Linac Facility.

doi: 10.1103/PhysRevC.105.044307
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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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2021KU10      Phys.Rev. C 103, 034315 (2021)

A.Kundu, Md.S.R.Laskar, R.Palit, R.Raut, S.Santra, N.Shimizu, T.Togashi, E.Ideguchi, H.Pai, S.Ali, F.S.Babra, R.Banik, S.Bhattacharya, S.Biswas, B.Das, P.Dey, R.Donthi, A.Goswami, S.Jadhav, G.Mukherjee, B.S.Naidu, S.Rajbanshi, L.P.Singh, H.P.Sharma, S.S.Tiwary, A.T.Vazhappilly

New lifetime measurement for the 2+1 level in 112Sn by the Doppler-shift attenuation method

NUCLEAR REACTIONS 112Sn(35Cl, 35Cl'), E=195 MeV; measured Eγ, Iγ, γγ-coin, half-lives of the first 2+ and 3- states from Doppler broadening using INGA array at BARC-TIFR Pelletron LINAC Facility. 112Sn; deduced levels, J, π, B(E2), B(E1); calculated potential energy surface in (Q2, Q4) plane using Q-constrained Hartree-Fock method. Comparison with previous measurements, and with generalized seniority model (GSM) and state-of-the-art Monte Carlo shell model (MCSM) calculations. Systematics of B(E2) for the first 2+ states in A=112-124 Sn nuclei.

doi: 10.1103/PhysRevC.103.034315
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2021LA06      Phys.Rev. C 104, L011301 (2021)

Md.S.R.Laskar, R.Palit, E.Ideguchi, T.Inakura, S.N.Mishra, F.S.Babra, S.Bhattacharya, D.Choudhury, B.Das, B.Das, P.Dey, U.Garg, A.K.Jain, A.Kundu, D.Kumar, D.Negi, S.C.Pancholi, S.Rajbanshi, S.Sihotra

Enhanced B(E3) strength observed in 137La

NUCLEAR REACTIONS 130Te(11B, 4n)137La, E=40 MeV; measured Eγ, Iγ, γγ-coin, level half-life by γγ(t) using an array of 11 Compton-suppressed HPGe clover and 14 LaBr3(Ce) detectors at the Pelletron Linac Facility of TIFR-Mumbai. 137La; deduced levels, J, π, half-life of 1005, 11/2- level, B(E3), sudden increase of B(E3) strength at N=80. Comparison with random-phase approximation (RPA) calculations. Systematics of B(E3) strengths in 129,133La and 132,134,136,138Ba.

doi: 10.1103/PhysRevC.104.L011301
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2021RA20      Phys.Rev. C 104, L031302 (2021)

S.Rajbanshi, S.Bhattacharya, R.Raut, R.Palit, S.Ali, R.Santra, H.Pai, F.S.Babra, R.Banik, S.Bhattacharyya, P.Dey, G.Mukherjee, Md.S.R.Laskar, S.Nandi, T.Trivedi, S.S.Ghugre, A.Goswami

Experimental evidence of exact E(5) symmetry in 82Kr

NUCLEAR REACTIONS 76Ge(9Be, 3n)82Kr, E≈31 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ)(DCO), γγ(linear polarization), half-lives of levels by Doppler-shift attenuation method using the INGA array at the TIFR-Mumbai Pelletron Linac Facility. 82Kr; deduced high-spin levels, J, π, multipolarities, bands, B(E2). Comparison with IBA calculations using E5 symmetry.

doi: 10.1103/PhysRevC.104.L031302
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2021RA31      Phys.Rev. C 104, 064316 (2021)

S.Rajbanshi, R.Palit, R.Raut, Y.Y.Wang, Z.X.Ren, J.Meng, Q.B.Chen, S.Ali, H.Pai, F.S.Babra, R.Banik, S.Bhattacharya, S.Bhattacharyya, P.Dey, S.Malik, G.Mukherjee, Md.S.R.Laskar, S.Nandi, R.Santra, T.Trivedi, S.S.Ghugre, A.Goswami

Evidence of octupole correlation in 79Se

NUCLEAR REACTIONS 76Ge(9Be, 2nα)79Se, E≈31 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ)(DCO), γγ(θ)(ADO ratios), γγ(linear polarization), T1/2 of levels by DSAM using INGA array of 14 Compton-suppressed clover detectors at the TIFR Pelletron Linac Facility. 79Se; deduced high-spin levels, J, π, multipolarities, multipole mixing ratios, B(M1), B(E2), B(E1)/B(E2) ratios, intrinsic dipole moments, octupole correlation; calculated potential energy surface in (β20, β30) plane based on the covariant density functional theory. Comparison of measured transition probabilities with reflection asymmetric triaxial particle rotor model (RAT-PRM) calculations.

doi: 10.1103/PhysRevC.104.064316
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2021RO24      Phys.Lett. B 823, 136756 (2021)

K.Rojeeta Devi, S.Kumar, N.Kumar, Neelam, F.S.Babra, M.S.R.Laskar, S.Biswas, S.Saha, P.Singh, S.Samanta, S.Das, S.Chakraborty, R.P.Singh, S.Muralithar, A.Kumar

Observation of multiphonon transverse wobbling in 133Ba

NUCLEAR REACTIONS 124Sn(13C, 4n), E=48 MeV; measured reaction products, Eγ, Iγ; deduced γ-ray energies and intensities, J, π, directional correlation from oriented states ratio and polarization asymmetry parameters, wobbling bands. Total Routhian Surface (TRS) calculations. 14-UD pelletron at Tata Institute of Fundamental Research (TIFR). Indian National Gamma Array (INGA) spectrometer.

doi: 10.1016/j.physletb.2021.136756
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Data from this article have been entered in the XUNDL database. For more information, click here.


2020LA06      Phys.Rev. C 101, 034315 (2020)

Md.S.R.Laskar, R.Palit, S.N.Mishra, N.Shimizu, Y.Utsuno, E.Ideguchi, U.Garg, S.Biswas, F.S.Babra, R.Gala, C.S.Palshetkar, Z.Naik

Structure of the 11/2- isomeric state in 133La

NUCLEAR REACTIONS 126Te(11B, 4n)133La, E=52 MeV; measured Eγ, Iγ, spin precession, g factor of the 11/2- isomeric state in 133La by time differential perturbed angular distribution (TDPAD) technique, and its half-life by γ(t) at the Pelletron Linac Facility of BARC-TIFR. 133La; deduced levels, J, π, spectroscopic quadrupole moment, β2. Analysis of spin rotation data by magnetic dipole and electric quadrupole hyperfine interactions. Comparison with large scale shell model calculations.

doi: 10.1103/PhysRevC.101.034315
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2020NE01      Phys.Rev. C 101, 014312 (2020)

Neelam, S.Kumar, K.Rojeeta Devi, N.Kumar, S.Saha, S.Biswas, P.Singh, F.S.Babra, Md.S.R.Laskar, R.Palit, S.Samanta, S.Das, A.Kumar, P.C.Srivastava

Intermediate structure and dipole bands in the transitional 134Ba nucleus

NUCLEAR REACTIONS 124Sn(13C, 3n)134Ba, E=48 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ)(DCO), γγ(linear polarization) using INGA array at the Pelletron-LINAC accelerator facility of TIFR, Mumbai. 134Ba; deduced high-spin levels, J, π, multipolarities, bands, magnetic-dipole rotational band, alignment plots, configurations, B(M1)/B(2), staggering. Systematics of dipole bands in 132,134Ba, 136Ce. Systematics of staggering and B(M1)/B(E2) in 130,132,134Ba. Tilted axis cranking (TAC) calculations for dipole bands.

doi: 10.1103/PhysRevC.101.014312
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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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2020SA22      Phys.Lett. B 806, 135487 (2020)

R.Santra, B.Dey, S.Roy, M.S.R.Laskar, R.Palit, H.Pai, S.Rajbanshi, S.Ali, S.Bhattacharjee, F.S.Babra, A.Mukherjee, S.Jadhav, B.S.Naidu, A.T.Vazhappilly, S.Pal

Nuclear level density of 69Zn from gamma gated particle spectrum and its implication on 68Zn(n, γ)69Zn capture cross section

NUCLEAR REACTIONS 64Zn(9Be, nα)68Zn, E=30 MeV; measured reaction products, Eα, Iα, Eγ, Iγ. 73Ge; deduced γ-ray energies, J, π, level scheme, yields, σ, nuclear level densities. Comparison with available data.

doi: 10.1016/j.physletb.2020.135487
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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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2019KU17      Phys.Rev. C 100, 034327 (2019)

A.Kundu, S.Santra, A.Pal, D.Chattopadhyay, R.Raut, R.Palit, Md.S.R.Laskar, F.S.Babra, C.S.Palshetkar, B.K.Nayak, S.Kailas

Measurement of the 2+1 level lifetime in 120Sn by the Doppler shift attenuation method: Evidence of enhanced collectivity

NUCLEAR STRUCTURE 120Sn(32S, 32S')120Sn*, E=120 MeV; measured Eγ, Iγ, γ(θ) using enriched target and INGA array of 11 Compton-suppressed HPGe detectors, half-life of the first 2+ level in 120Sn from DSAM at the BARC-TIFR Pelletron LINAC facility. 120Sn; deduced level, B(E2) for the first 2+ state, enhanced collectivity, anharmonic nature of quadrupole vibrations; compiled experimental B(E2) values for the first 2+ states in 112,114,116,118,120,122,124Sn.

doi: 10.1103/PhysRevC.100.034327
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2019LA01      Phys.Rev. C 99, 014308 (2019)

Md.S.R.Laskar, S.Saha, R.Palit, S.N.Mishra, N.Shimizu, Y.Utsuno, E.Ideguchi, Z.Naik, F.S.Babra, S.Biswas, S.Kumar, S.K.Mohanta, C.S.Palshetkar, P.Singh, P.C.Srivastava

g-factor measurement of the 2738 keV isomer in 135La

NUCLEAR REACTIONS 128Te(11B, 4n), E=52 MeV; measured delayed γ spectra, g factor by hyperfine interactions using TDPAD technique, half-life of the 23/2+ nanosecond isomer at the heavy-ion accelerator facility of TIFR, Mumbai. 135La; deduced level, configuration. Comparison with large-scale shell model calculations with SNV interaction.

NUCLEAR MOMENTS 135La; measured g factor of the 2738-keV, 23/2+ isomer by hyperfine interactions using TDPAD technique, using 128Te(11B, 4n) reaction. Comparison with shell-model calculations.

doi: 10.1103/PhysRevC.99.014308
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2019SA04      Phys.Rev. C 99, 014315 (2019)

S.Samanta, S.Das, R.Bhattacharjee, S.Chatterjee, R.Raut, S.S.Ghugre, A.K.Sinha, U.Garg, Neelam, N.Kumar, P.Jones, Md.S.R.Laskar, F.S.Babra, S.Biswas, S.Saha, P.Singh, R.Palit

Single particle configurations in 61Ni

NUCLEAR REACTIONS 59Co(7Li, nα), (7Li, X), E=22-24 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ)(DCO and ADO), γγ(linear polarization) using 11 Compton-suppressed Ge clover detectors at the Pelletron LINAC facility of TIFR, Mumbai. 61Ni; deduced high-spin levels, J, π, multipolarities, configurations. Comparison with previous experimental data, and with large basis shell-model calculations.

NUCLEAR STRUCTURE 61Ni; calculated levels, J, π, representative and dominant partitions of wave functions of positive and negative parity states using large basis shell-model with JJ44BPN and JUN45 interactions. Comparison with experimental data.

doi: 10.1103/PhysRevC.99.014315
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2019SA28      Phys.Rev. C 99, 054301 (2019)

S.Saha, R.Palit, J.Sethi, S.Biswas, P.Singh, S.Nag, A.K.Singh, I.Ragnarsson, F.S.Babra, U.Garg, A.Goswami, E.Ideguchi, H.C.Jain, S.Kumar, Md.S.R.Laskar, G.Mukherjee, Z.Naik, C.S.Palshetkar

Observation of rotation about the longest principal axis in 89Zr

NUCLEAR REACTIONS 80Se(13C, 4n), E=50, 60 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ)(DCO), γγ(polarization asymmetry), and level half-lives by DSAM using INGA array at TIFR accelerator facility. 89Zr; deduced high-spin levels, J, π, multipolarities, dipole band, B(M1), configuration; calculated excitation energy relative to a rotating liquid drop energy as a function of spin, and total energy surface plots using cranked Nilsson-Strutinsky model.

doi: 10.1103/PhysRevC.99.054301
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2018SA02      Phys.Rev. C 97, 014319 (2018)

S.Samanta, S.Das, R.Bhattacharjee, S.Chatterjee, R.Raut, S.S.Ghugre, A.K.Sinha, U.Garg, Neelam, N.Kumar, P.Jones, Md.SazedurR.Laskar, F.S.Babra, S.Biswas, S.Saha, P.Singh, R.Palit

Single-particle excitations in the level structure of 64Cu

NUCLEAR REACTIONS 59Co(7Li, np), E=22-24 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ)(ADO), γγ(linear polarization) using an array of 11 Compton-suppressed Clover detectors at Pelletron LINAC facility of TIFR, Mumbai. 64Cu; deduced high-spin levels, J, π, multipolarities, configurations. Comparison with shell-model calculations using the NUSHELLX code.

NUCLEAR STRUCTURE 64Cu; calculated levels, J, π, configurations using the NUSHELLX code. Comparison with experimental data.

doi: 10.1103/PhysRevC.97.014319
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2017BI10      Phys.Rev. C 95, 064320 (2017)

S.Biswas, R.Palit, J.Sethi, S.Saha, A.Raghav, U.Garg, Md.S.R.Laskar, F.S.Babra, Z.Naik, S.Sharma, A.Y.Deo, V.V.Parkar, B.S.Naidu, R.Donthi, S.Jadhav, H.C.Jain, P.K.Joshi, S.Sihotra, S.Kumar, D.Mehta, G.Mukherjee, A.Goswami, P.C.Srivastava

High-spin states in 133Cs and the shell model description

NUCLEAR REACTIONS 130Te(7Li, 4n), E=45 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ)(DCO), γγ(linear polarization) using INGA array of 15 Compton-suppressed HPGe clover detectors at TIFR-Mumbai accelerator facility. 133Cs; deduced high-spin levels, J, π, multipolarities, bands, configurations. Comparison with large-scale shell model calculation using jj55pna interaction. Systematics of band structures in 127,129,131,133,135,137Cs.

doi: 10.1103/PhysRevC.95.064320
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