NSR Query Results
Output year order : Descending NSR database version of May 24, 2024. Search: Author = S.G.Wahid Found 12 matches. 2022BO04 Phys.Rev. C 105, 044327 (2022) V.Bothe, S.K.Tandel, S.G.Wahid, P.C.Srivastava, B.Bhoy, P.Chowdhury, R.V.F.Janssens, F.G.Kondev, M.P.Carpenter, T.Lauritsen, D.Seweryniak, S.Zhu Isomers in ^{203}Tl and core excitations built on a five-nucleon-hole structure NUCLEAR REACTIONS ^{197}Au(^{209}Bi, X)^{203}Tl, E=1450 MeV; measured Eγ, Iγ, γγ-coin, γγγ-coin. ^{203}Tl; deduced levels, J, π, multipolarities, T_{1/2} of high-spin isomeric states, configurations. Half-lives determined by centroid-shift method for ns isomers and by variation with time of the cumulative intensity for υs isomers. Observed octupole core excitations built on a five-nucleon hole configuration. Comparison with shell-model calculations employing the KHH7B effective interaction. Gammasphere array with 100 detectors at ATLAS accelerator (ANL).
doi: 10.1103/PhysRevC.105.044327
2022MA16 Phys.Rev. C 105, 034308 (2022) Madhu, K.Yadav, A.Y.Deo, Pragati, P.C.Srivastava, S.K.Tandel, S.G.Wahid, S.Kumar, S.Muralithar, R.P.Singh, I.Bala, S.S.Bhattacharjee, R.Garg, S.Chakraborty, S.Rai, A.K.Jain Evolution of nuclear structure through isomerism in ^{216}Fr NUCLEAR REACTIONS ^{208}Pb(^{11}B, 3n), E=54-62 MeV; measured Eγ, Iγ, γ(θ), γγ-coin. ^{216}Fr; deduced high-spin isomers, J, π, T_{1/2} of isomeric states, γ-ray branching ratios, B(E1), B(M2), single-particle transition rates, configurations. Half-lives extracted using centroid-shift and decay-curve analyses. Systematics of the 11^{+} isomers properties in the ^{216}Fr, ^{212}At, ^{218}Ac. Comparison to the shell-model calculations. Beam from 15 UD Pelletron accelerator at Inter-University Accelerator Centre (IUAC). Detector system - Indian National Gamma Array (INGA) with 14 Compton suppressed clover HPGe.
doi: 10.1103/PhysRevC.105.034308
2022SU19 Phys.Rev. C 106, 024316 (2022) S.Suman, S.K.Tandel, S.G.Wahid, T.Manu, M.Hemalatha, B.Maheshwari, A.K.Jain, P.Chowdhury, R.V.F.Janssens, F.G.Kondev, M.P.Carpenter, T.Lauritsen, D.Seweryniak Successive neutron alignments in the yrast, negative-parity band of oblate-deformed ^{199}Tl NUCLEAR REACTIONS ^{197}Au(^{209}Bi, X)^{199}Tl, E=1450 MeV; measured Eγ, Iγ, γγ-coin using Gammasphere array with 100 Compton-suppressed HPGe detectors at the ATLAS-ANL accelerator facility. ^{199}Tl; deduced high-spin levels, J, π, alignments, signature slitting, B(M1)/B(E2), configurations, oblate deformation. ^{199}Tl; calculated total energy surfaces in (ϵ cosγ, ϵ sinγ) plane, neutron- and proton-quasiparticle levels for oblate deformation as function of angular frequency with principal axis cranking (PAC) and tilted axis cranking (TAC) models using the ultimate cranker (UC) code.
doi: 10.1103/PhysRevC.106.024316
2022WA20 Phys.Lett. B 832, 137262 (2022) S.G.Wahid, S.K.Tandel, S.Suman, P.C.Srivastava, A.Kumar, P.Chowdhury, F.G.Kondev, R.V.F.Janssens, M.P.Carpenter, T.Lauritsen, D.Seweryniak, S.Zhu Emergence of an island of extreme nuclear isomerism at high excitation near ^{208}Pb NUCLEAR REACTIONS ^{197}Au(^{207}Pb, X)^{204}Pb/^{205}Bi/^{206}Bi, E=1430 MeV; ^{197}Au(^{207}Pb, X)^{204}Pb/^{205}Bi/^{206}Bi, E=1450 MeV; measured Eγ, Iγ, γγ-coin, delayed γ spectra, T_{1/2} of isomers by γγ(t) using pulsed beam from ATLAS-ANL facility, and Gammasphere array for γ detection. ^{204}Pb, ^{205,206}Bi; deduced levels, isomers, J, π, configurations, nuclear isomerism from core-excited configurations in the vicinity of ^{208}Pb. Comparison with shell-model predictions. COMPILATION ^{93}Nb, ^{93}Mo, ^{140}Nd, ^{144}Pm, ^{148}Tb, ^{212,213}Fr, ^{204}Pb, ^{205,206}Bi; compiled T_{1/2} of isomers of >1 micro-sec half-life above 7-MeV excitations across the nuclear chart. ^{202,203,204,205}Tl, ^{202,203,204}Pb, ^{206}Bi, ^{213}At, ^{210,211,212}Rn, ^{209,211,212}Fr; compiled B(E3) for isomer decays.
doi: 10.1016/j.physletb.2022.137262
2022YA10 Phys.Rev. C 105, 034307 (2022) K.Yadav, A.Y.Deo, Madhu, Pragati, P.C.Srivastava, S.K.Tandel, S.G.Wahid, S.Kumar, S.Muralithar, R.P.Singh, I.Bala, S.S.Bhattacharjee, R.Garg, S.Chakraborty, S.Rai, A.K.Jain Level structure in the transitional nucleus ^{215}Fr NUCLEAR REACTIONS ^{208}Pb(^{11}B, 4n), E=54-62 MeV; measured Eγ, Iγ, γ(θ), γγ-coin, γγγ-coin. ^{215}Fr; deduced levels, high-spin states, J, π, δ, DCO-ratios, γ-ray multipolarities, polarization, T_{1/2} of the excited states, configurations; calculated levels, J, π, B(E2), B(M1), B(E3), δ. Large scale shell model calculations with CD-Bonn NN potential. Discussed possible structure of yrast and near-yrast lines. Beam from 15 UD Pelletron accelerator at Inter-University Accelerator Centre (IUAC). Detector system - Indian National Gamma Array (INGA) with 14 Compton suppressed clover HPGe.
doi: 10.1103/PhysRevC.105.034307
2021LA10 Int.J.Mod.Phys. E30, 2150062 (2021) Study of signature inversion in ^{123, 125}I using Particle Rotor Model calculations NUCLEAR STRUCTURE ^{123,125}I; calculated energy levels, J, π, positive parity yrast bands, B(E2), B(M1); deduced signature inversion in positive parity yrast states.
doi: 10.1142/S0218301321500622
2021SU02 Phys.Rev. C 103, 014319 (2021) S.Suman, S.K.Tandel, A.Kumawat, S.G.Wahid, M.Hemalatha, P.Chowdhury, R.V.F.Janssens, M.P.Carpenter, T.L.Khoo, F.G.Kondev, T.Lauritsen, C.J.Lister, D.Seweryniak, S.Zhu Nanosecond isomers and the evolution of collectivity in stable, even-A Hg isotopes NUCLEAR REACTIONS ^{197}Au(^{209}Bi, X), E=1450 MeV; ^{197}Au(^{207}Pb, X), E=1430 MeV; measured Eγ, Iγ, three- and higher fold γγ-coin, γγ(θ)(DCO), half-lives of nanosecond isomers by γγ(t) using pulsed beams from ATLAS-ANL accelerator, and Gammasphere array of 100 Compton-suppressed HPGe detectors. ^{198,200,202}Hg; deduced levels, J, π, multipolarities, B(E2), configurations, band crossings, and collectivity; calculated total energy surface plots, neutron and proton quasiparticle energy levels using the Ultimate Cranker code. Systematics of nanosecond isomers, half-lives and B(E2) in ^{192,194,196,198,200,202,204}Hg.
doi: 10.1103/PhysRevC.103.014319
2020WA24 Phys.Rev. C 102, 024329 (2020) S.G.Wahid, S.K.Tandel, S.Suman, M.Hemalatha, A.Patel, P.Roy, A.Y.Deo, Pragati, P.C.Srivastava, B.Bhoy, S.S.Bhattacharjee, R.P.Singh, S.Muralithar, P.Chowdhury, R.V.F.Janssens, M.P.Carpenter, T.L.Khoo, F.G.Kondev, T.Lauritsen, C.J.Lister, D.Seweryniak, S.Zhu, S.Rai, A.Sharma Metastable states from multinucleon excitations in ^{202}Tl and ^{203}Pb NUCLEAR REACTIONS ^{198}Pt(^{7}Li, 3n)^{202}Tl, E=31-36 MeV; ^{197}Au(^{209}Bi, X), E=1450 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ)(DCO), γγ(linear polarization), half-lives of isomers by γ(t) and centroid-shift method using the INGA array at IUAC-New Delhi for the ^{202}Tl experiment, and Gammasphere array at the ATLAS-ANL facility for ^{203}Pb. ^{202}Tl, ^{203}Pb; deduced high-spin levels, isomers, J, π, multipolarities, B(E2), B(E3), configurations. Systematics of energies and B(Eλ) for isomers in ^{202,203,204}Tl and ^{203,204,205}Pb. Comparison with shell-model calculations.
doi: 10.1103/PhysRevC.102.024329
2019WA22 Phys.Rev. C 100, 014328 (2019) S.G.Wahid, S.K.Tandel, P.Chowdhury, R.V.F.Janssens, M.P.Carpenter, T.L.Khoo, F.G.Kondev, T.Lauritsen, C.J.Lister, D.Seweryniak, S.Zhu, Q.B.Chen, J.Meng Structure of odd-A Pt isotopes along the line of stability NUCLEAR REACTIONS ^{197}Au(^{209}Bi, X)^{193}Pt/^{195}Pt/^{197}Pt, E=1450 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ)(DCO), half-lives of isomers by centroid-shift technique using the Gammasphere array at ATLAS-ANL facility. ^{193,195,197}Pt; deduced levels, J, π, multipolarities, alignments, configurations. Comparison with theoretical calculations. NUCLEAR STRUCTURE ^{193,195,197}Pt; calculated levels, J, π, total energy surfaces, and B(E2); deduced shapes and band crossings. Tilted axis cranking covariant density functional theory (TAC-CDFT) using the Ultimate Cranker code. Comparison with experimental data. Systematics of positive-parity levels in A=189-196 even- and odd-A Pt isotopes.
doi: 10.1103/PhysRevC.100.014328
2018PR03 Phys.Rev. C 97, 044309 (2018) Pragati, A.Y.Deo, S.K.Tandel, S.S.Bhattacharjee, S.Chakraborty, S.Rai, S.G.Wahid, S.Kumar, S.Muralithar, R.P.Singh, I.Bala, R.Garg, A.K.Jain Parity doublet structures in doubly-odd ^{216}Fr NUCLEAR REACTIONS ^{208}Pb(^{11}B, 3n), E=54-62 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ)(DCO), γγ(linear polarization) using the INGA array at the 15-UD pelletron accelerator facility of IUAC, New Delhi. ^{216}Fr; deduced high-spin levels, J, π, parity doublet (simplex-partner) structures, B(E1)/B(E2) ratios, and enhancement of octupole correlations. Systematics of E1 energy splitting, and angular momentum versus rotational frequency plots for ^{216}Fr, ^{219,223}Th, ^{218,220}Ac, and B(E1)/B(E2) ratios for ^{216}Fr and ^{218}Ac.
doi: 10.1103/PhysRevC.97.044309
2015TA25 Phys.Lett. B 750, 225 (2015) S.K.Tandel, S.G.Wahid, P.Chowdhury, R.V.F.Janssens, M.P.Carpenter, T.L.Khoo, F.G.Kondev, T.Lauritsen, C.J.Lister, D.Seweryniak, S.Zhu Isomers and oblate rotation in Pt isotopes: Delineating the limit for collectivity at high spins NUCLEAR REACTIONS ^{197}Au(^{209}Bi, X)^{194}Pt/^{196}Pt/^{198}Pt, E=1450 MeV; measured reaction products, Eγ, Iγ; deduced energy levels, J, π, high-spin B(E2). Cranking calculations using both standard Nilsson parameters in the Ultimate Cranker (UC) code.
doi: 10.1016/j.physletb.2015.09.019
2015WA34 Phys.Rev. C 92, 054323 (2015) S.G.Wahid, S.K.Tandel, P.Chowdhury, R.V.F.Janssens, M.P.Carpenter, T.L.Khoo, F.G.Kondev, T.Lauritsen, C.J.Lister, D.Seweryniak, S.Zhu Rotation-aligned isomer and oblate collectivity in ^{196}Pt NUCLEAR REACTIONS ^{197}Au(^{209}Bi, X)^{196}Pt, E=1450 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ)(DCO), level and isomer half-lives by γγ(t) using Gammasphere array at ATLS-ANL. ^{196}Pt; deduced high-spin levels, J, π, bands, multipolarity, B(E2), alignment plots, rotation-aligned isomeric state, configurations, shape evolution; calculated total energy surface plots. Comparison with cranked shell-model calculations. Systematics of level structures in ^{192,194,196,198}Pt, and those of alignments in N=118 isotones ^{194}Os, ^{196}Pt and ^{198}Hg.
doi: 10.1103/PhysRevC.92.054323
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