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NSR database version of May 24, 2024.

Search: Author = B.Maheshwari

Found 21 matches.

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2024GH03      J.Phys.(London) G51, 045105 (2024)

T.Ghosh, Sangeeta, B.Maheshwari, G.Saxena, B.K.Agrawal

Indispensability of cross-shell contributions in neutron resonance spacing

NUCLEAR STRUCTURE 24Na, 25,26,27Mg; calculated J and π dependent nuclear level densities (NLDs) for a configuration interaction shell model using a numerically efficient spectral distribution method; deduced the s-wave neutron resonance spacing (D0).

doi: 10.1088/1361-6471/ad29e9
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2023GA02      At.Data Nucl.Data Tables 150, 101546 (2023)

S.Garg, B.Maheshwari, B.Singh, Y.Sun, A.Goel, A.K.Jain

Atlas of nuclear isomers-Second edition

COMPILATION Z=4-109; compiled, evaluated nuclear structure data, isomeric T1/2, J, π, decay modes.

doi: 10.1016/j.adt.2022.101546
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2022GH01      J.Phys.(London) G49, 25103 (2022)

T.Ghosh, B.Maheshwari, Sangeeta, G.Saxena, B.K.Agrawal

Nuclear level densities away from line of β-stability

NUCLEAR STRUCTURE Z=10-80; analyzed available data; deduced nuclear level densities, ground-shell corrections, parameters.

doi: 10.1088/1361-6471/ac44ac
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2022MA09      Phys.Rev. C 105, 024315 (2022)

B.Maheshwari, D.Choudhury, A.K.Jain

Puzzle on isomeric configurations in and around N=126 closed shell

NUCLEAR STRUCTURE 208,210,212Po, 210,212,214Rn, 212,214,216Ra, 214,216,218Th, 209,211At, 211,213Fr, 213,215Ac, 215,217Pa; calculated B(E2). 207,209Bi, 209,211At, 211,213Fr, 213,215Ac, 208,210Po, 210,212Rn, 212,214Ra, 214,216Th; calculated quadrupole moments, g-factors for isomeric states. 210, Po, 212, Rn, 214Ra, 216Th, occupancies for the 8+ isomers. Generalized Seniority Schmidt model. Comparison to experimental data.

doi: 10.1103/PhysRevC.105.024315
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2022SA17      Phys.Rev. C 105, 044320 (2022)

Sangeeta, T.Ghosh, B.Maheshwari, G.Saxena, B.K.Agrawal

Astrophysical reaction rates with realistic nuclear level densities

NUCLEAR STRUCTURE 51V, 55Fe, 59Ni; calculated ground-state energies, nuclear level densities. 49,50Ti, 51V, 53Cr, 55,57Fe, 59Ni; calculated S-wave neutron resonances. Ground state properties calculated by using shell-model with the GXPF1A residual interaction. Nuclear level densities obtained within the spectral distribution method (SDM). Comparison to available experimental data and other theoretical calculations.

NUCLEAR REACTIONS 50V, 54Fe, 58Ni(n, γ), E(cm)<8 MeV; calculated σ(E), astrophysical reaction rates. TALYS 1.95 calculations using nuclear level densities obtained within the spectral distribution method (SDM). Comparison to experimental data and recommended values from ENDF and KADONIS V0.3.

doi: 10.1103/PhysRevC.105.044320
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2022SU19      Phys.Rev. C 106, 024316 (2022)

S.Suman, S.K.Tandel, S.G.Wahid, T.Manu, M.Hemalatha, B.Maheshwari, A.K.Jain, P.Chowdhury, R.V.F.Janssens, F.G.Kondev, M.P.Carpenter, T.Lauritsen, D.Seweryniak

Successive neutron alignments in the yrast, negative-parity band of oblate-deformed 199Tl

NUCLEAR REACTIONS 197Au(209Bi, X)199Tl, E=1450 MeV; measured Eγ, Iγ, γγ-coin using Gammasphere array with 100 Compton-suppressed HPGe detectors at the ATLAS-ANL accelerator facility. 199Tl; deduced high-spin levels, J, π, alignments, signature slitting, B(M1)/B(E2), configurations, oblate deformation. 199Tl; calculated total energy surfaces in (ϵ cosγ, ϵ sinγ) plane, neutron- and proton-quasiparticle levels for oblate deformation as function of angular frequency with principal axis cranking (PAC) and tilted axis cranking (TAC) models using the ultimate cranker (UC) code.

doi: 10.1103/PhysRevC.106.024316
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2021BH10      J.Phys.(London) G48, 075105 (2021)

M.Bhuyan, B.Maheshwari, H.A.Kassim, N.Yusof, S.K.Patra, B.V.Carlson, P.D.Stevenson

The kinks in charge radii across N = 82 and 126 revisited

NUCLEAR STRUCTURE 126,128,130,132,134,136,138Sn, 202,204,206,208,210,212,214Pb; analyzed available data; deduced isotopic shift over the isotopic chains, energy levels, J, π, yrast states within the relativistic mean-field (RMF) and relativistic-Hartree-Bogoliubov (RHB) approach.

doi: 10.1088/1361-6471/abf7d7
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2021DE09      Phys.Rev. C 103, 044322 (2021)

A.Dey, D.C.Biswas, A.Chakraborty, S.Mukhopadhyay, A.K.Mondal, L.S.Danu, B.Mukherjee, S.Garg, B.Maheshwari, A.K.Jain, A.Blanc, G.de France, M.Jentschel, U.Koster, S.Leoni, P.Mutti, G.Simpson, T.Soldner, C.A.Ur, and W.Urban

Measurement of relative isotopic yield distribution of even-even fission fragments from 235U(nth, f) following γ-ray spectroscopy

NUCLEAR REACTIONS 235U(n, F)86Se/88Se/88Kr/90Kr/92Kr/92Sr/94Sr/96Sr/96Zr/98Zr/100Zr/102Zr/104Mo/106Mo/130Sn/132Sn/132Te/136Xe/138Xe/140Xe/144Ba/146Ba/144Ce, E=thermal; measured Eγ, Iγ, γγ- and γγγ-coin using the EXILL array of eight EXOGAM Clover detectors, six large coaxial detectors from GASP, and two clovers at ILL-Grenoble for γ detection; deduced relative isotopic yield distributions of the even-even neutron-rich fission fragments. Z=34-54, A=86-142; assigned values of the third component of isospins T3 and total isospins for all the possible even-even fission fragments produced in the 235U(n, F), E=thermal reaction. Comparison with theoretical calculations using the semiempirical GEF model, and isospin conservation (ISCF) approach.

doi: 10.1103/PhysRevC.103.044322
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2021MA48      Nucl.Phys. A1014, 122277 (2021)

B.Maheshwari, D.Choudhury, A.K.Jain

Generalized seniority isomers in and around Z=82 closed shell: A survey of Hg, Pb and Po isotopes

NUCLEAR STRUCTURE 185,187,189,191,193,195,197,199Hg, 183,185,187,189,191,193,195,197Pb, 205Pb, 195,197,199,201,203,205,207Po; analyzed available data on g-factors, B(E2); deduced the generalized seniority scheme and the validity of Generalized Seniority Schmidt Model.

doi: 10.1016/j.nuclphysa.2021.122277
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2020AG04      Eur.Phys.J. Special Topics 229, 2459 (2020)

B.K.Agrawal, B.Maheshwari

Pairing, quasi-spin and seniority

doi: 10.1140/epjst/e2020-000047-2
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2020MA54      Eur.Phys.J. Special Topics 229, 2485 (2020)


A unified view of the first-excited 2+ and 3- states of Cd, Sn and Te isotopes

NUCLEAR STRUCTURE 90,92,94,96,98,100,102,104,106,108,110,112,114,116,118,120,122,124,126,128Cd, 92,94,96,98,100,102,104,106,108,110,112,114,116,118,120,122,124,126,128,130Sn, 96,98,100,102,104,106,108,110,112,114,116,118,120,122,124,126,128,130,132Te; calculated B(E2), B(E3) values. Comparison with available data.

doi: 10.1140/epjst/e2020-000097-3
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2019MA32      Nucl.Phys. A986, 232 (2019)

B.Maheshwari, A.K.Jain

Generalized seniority Schmidt model and the g-factors in semi-magic nuclei

NUCLEAR STRUCTURE 102,104,106,108,110,112,114,116,118,120,122,124,126,128,130,132Sn, 111,113,115,117,119,121,123,125,127,129,131Sn, 183,184,185,186,187,188,189,190,191,192,193,194,195,196,197,198,199Pb; calculated 2+1 g-factors for even-mass Sn isotopes and for 11/2- and 1+ isomers for Sn odd-mass isotopes, for 13/2- states and 12+ and 3/2- Pb isomers using Generalized Seniority Schmidt Model (GSSM); compared with Schmidt lines and with available data.

doi: 10.1016/j.nuclphysa.2019.03.019
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2019MA80      Nucl.Phys. A992, 121619 (2019)

B.Maheshwari, H.Abu Kassim, N.Yusof, A.K.Jain

Evolution of nuclear structure in and around Z = 50 closed shell: Generalized seniority in Cd, Sn and Te isotopes

NUCLEAR STRUCTURE N=50-88; calculated first excited 2+ and 11/2-states, quadrupole moments, B(E2, 2+TO 0+), g-factor for the first 2+ excited states of Cd, Sn, Te; deduced linearly varying quadrupole moments are described using a consistent multi-j configuration within the Generalized Seniority Schmidt Model (GSSM) scheme; deduced asymmetric double-hump behavior of B(E2) values; compared calculated energies of the first 11/2- states and empirical g-factor trend with experimental data.

doi: 10.1016/j.nuclphysa.2019.121619
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2017JA09      Phys.Scr. 92, 074004 (2017)

A.K.Jain, B.Maheshwari

Generalized seniority states and isomers in tin isotopes

NUCLEAR STRUCTURE 134,136,138Sn, 210Bi, 134Sb; calculated energy levels, J, π, B(E2). Comparison with experimental data.

doi: 10.1088/1402-4896/aa7353
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2017MA69      Pramana 89, 75 (2017)

B.Maheshwari, S.Garg, A.K.Jain

Rapid Communication: Δ ν = 2 seniority changing transitions in yrast 3- states and B(E3) systematics of Sn isotopes

NUCLEAR STRUCTURE 110,112,114,116,118,120,122,124,126,128Sn; analyzed available data; deduced B(E3) systematics.

doi: 10.1007/s12043-017-1475-z
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2016MA31      Nucl.Phys. A952, 62 (2016)

B.Maheshwari, A.K.Jain, B.Singh

Asymmetric behavior of the B(E2↑; 0+ → 2+) values in 104-130Sn and generalized seniority

NUCLEAR STRUCTURE 104,106,108,110,112,114,116,118,120,122,124,126,128,130Sn; calculated B(E2) for 0+ to 2+1 state using both generalized seniority and seniority guided LSSM (Large Scale Shell Model); compared to data or evaluations; deduced B(E2) dip in the middle of full valence space (seen also in the data).

doi: 10.1016/j.nuclphysa.2016.04.021
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2015CH05      Phys.Rev. C 91, 014318 (2015)

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

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

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

doi: 10.1103/PhysRevC.91.014318
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2015JA04      Nucl.Data Sheets 128, 1 (2015)

A.K.Jain, B.Maheshwari, S.Garg, M.Patial, B.Singh

Atlas of Nuclear Isomers

COMPILATION Z=4-109; compiled experimental nuclear structure data on isomers.

doi: 10.1016/j.nds.2015.08.001
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2015MA10      Phys.Rev. C 91, 024321 (2015)

B.Maheshwari, A.K.Jain, P.C.Srivastava

6+ isomers in neutron-rich Sn isotopes beyond N=82 and effective interactions

NUCLEAR STRUCTURE 134,136,138Sn; calculated levels, J, π, B(E2), energies of 6+ seniority isomers, average occupancy of f7/2 and p3/2 orbitals. Shell-model calculations using RCDB effective interaction. Comparison with experimental data and systematics. Modification needed in the RCDB interaction beyond the N=82 magic number.

doi: 10.1103/PhysRevC.91.024321
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2014JA10      Nucl.Data Sheets 120, 123 (2014)

A.K.Jain, D.Choudhury, B.Maheshwari

Conservation of Isospin in Neutron-rich Fission Fragments

NUCLEAR REACTIONS 238U, 208Pb(18O, F), 245Cm(n, F), E not given; analyzed available data for fission fragment mass distribution.; deduced the conservation of the total isospin.

doi: 10.1016/j.nds.2014.07.024
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2014PA53      Phys.Rev. C 90, 064314 (2014)

H.Pai, G.Mukherjee, S.Bhattacharyya, C.Bhattacharya, S.Bhattacharya, T.Bhattacharjee, S.K.Basu, S.Kundu, T.K.Ghosh, K.Banerjee, T.K.Rana, J.K.Meena, R.K.Bhowmik, R.P.Singh, S.Muralithar, S.Chanda, R.Garg, B.Maheshwari, D.Choudhury, A.K.Jain

Crossing of large multiquasiparticle magnetic-rotation bands in 198Bi

NUCLEAR REACTIONS 185Re(16O, 3n), 187Re(16O, 5n), E=112.5 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ)(DCO), γγ(lin pol) using INGA array at 15-UD Pelletron at IUAC facility. Natural Re target. 198Bi; deduced high-spin levels, J, π, multipolarity, bands, multiquasiparticle (qp) configurations, alignments, B(M1). Comparison with tilted-axis cranking (TAC) calculations, and with 197Bi and 197Pb bands. Semiclassical formalism, particle-hole interaction strength

doi: 10.1103/PhysRevC.90.064314
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Data from this article have been entered in the XUNDL database. For more information, click here.

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