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NSR database version of April 11, 2024.

Search: Author = Sangeeta

Found 11 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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2024HI02      Chin.Phys.C 48, 024001 (2024)

A.Hingu, S.Mukherjee, S.Parashari, A.Sangeeta, A.Gandhi, M.Upadhyay, M.Choudhary, S.Bamal, N.Singh, G.Mishra, S.De, S.Sood, S.Prasad, G.Saxena, A.Kumar, R.G.Thomas, B.K.Agrawal, K.Katovsky, A.Kumar

Investigation of 58Ni(n, p)58Co reaction cross-section with covariance analysis

NUCLEAR REACTIONS 58Ni(n, p), 115In(n, n'), E=1.7-2.7 MeV; measured reaction products, Eγ, Iγ; deduced σ and correlation matrix. Comparison with EXFOR, ENDF/B-VIII.0, JEFF-3.3, JENDL-4.0, and CENDL-3.2 libraries, TALYS calculations. The Folded Tendem Ion Accelerator (FOTIA) facility at the Bhabha Atomic Research Centre (BARC), Mumbai, India.

doi: 10.1088/1674-1137/ad0e5a
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2023GH04      Eur.Phys.J. A 59, 266 (2023)

T.Ghosh, Sangeeta, G.Saxena, B.K.Agrawal, U.Datta

Impact of density dependence of symmetry energy on astrophysical S-factor for heavy-ion fusion reactions

NUCLEAR STRUCTURE 16,24O, 40,48,54,60Ca, 78Ni, 124,132Sn; analyzed available data; deduced Radial density distributions for neutrons and protons from SLy4 and SkO Skyrme effective interactions.

NUCLEAR REACTIONS 40Ca(40Ca, X), 16O(16O, X), 24O(24O, X), 54Ca(54Ca, X), 60Ca(60Ca, X), 78Ni(78Ni, X), 124Sn(124Sn, X), 132Sn(132Sn, X), E(cm)=45-50 MeV; analyzed available data; deduced σ, the maximum barrier height and width obtained by DFM potentials M3Y-Paris without density dependence (PDD0), sub-barrier fusion σ and astrophysical S-factor. Comparison with available data.

doi: 10.1140/epja/s10050-023-01173-7
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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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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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2020MO33      Phys.Rev. C 102, 044610 (2020)

G.Mohanto, S.De, A.Parihari, P.C.Rout, K.Ramachandran, K.Mahata, E.T.Mirgule, R.Gandhi, Sangeeta, M.Kushwaha, B.Srinivasan, S.Santra, A.Shrivastava, S.P.Behera, B.J.Roy, A.Jhingan, B.K.Nayak, A.Saxena

Effect of nuclear structure and fissility on quasifission

NUCLEAR REACTIONS 206,208Pb(35Cl, X), (37Cl, X), E(cm)/VB=0.95-1.05; measured fission fragments and time-of-flight of fragments using two position sensitive multiwire proportional counters (MWPCs); deduced fission fragment velocities, mass ratio and center-of-mass angle, mass-angle distributions (MAD spectra), absence of mass-angle correlations and that of fast quasifission (QF); analyzed mass widths of the mass distributions as function of excitation energy for the reactions studied in this work, and compared with previous experimental results for 208Pb(34S, X) and 208Pb(30Si, X) reactions. 208Pb, 238U(12C, X), E not given; 182W(13C, X), E not given; 175Lu, 186W, 186,192Os, 196Pt, 200Hg, 208Pb, 238U(16O, X), E not given; 232Th(18O, X), E not given; 178Hf, 238U(24Mg, X), E not given; 170Yb, 238U(28Si, X), E not given; 208Pb, 232Th(30Si, X), E not given; 178Hf, 194Pt, 202Hg, 208Pb(34S, X), E not given; 168Er, 186W, 208Pb, 232Th(34S, X), E not given; 154Sm, 206,208Pb(35Cl, X), (37Cl, X), E not given; 144Sm(35Cl, X), E not given; 142Nd, 154Sm, 198Pt, 208Pb, 232Th, 238U(40Ca, X), E not given; 144Sm, 162Dy, 170Er, 174Yb, 178Hf, 186W, 192Os, 196Pt, 200Hg, 208Pb, 238U(48Ti, X), E not given; 144,154Sm(48Ca, X), E not given; 154Sm, 170Er, 184W, 192Os, 198Pt, 208Pb(64Ni, X), E not given; analyzed measured cross sections and mass-angle distributions (MADs) by including deformation parameter β2; deduced effect on quasifission (QF) process.

doi: 10.1103/PhysRevC.102.044610
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2019MO25      Phys.Rev. C 100, 011602 (2019)

G.Mohanto, A.Parihari, P.C.Rout, S.De, E.T.Mirgule, B.Srinivasan, K.Mahata, S.P.Behera, M.Kushwaha, D.Sarkar, B.K.Nayak, A.Saxena, A.K.R.Kumar, A.Gandhi, Sangeeta, N.K.Deb, P.Arumugam

Collective enhancement in nuclear level density

NUCLEAR REACTIONS 181Ta, 197Au(11B, X)192Pt*/208Pb*, E=61.5, 63.0 MeV; measured Eα, Iα, neutron time of flight, E(n), I(n), and αn-coin from the compound nuclei using ΔE-E telescopes for charged particle detection and liquid scintillator array for neutron detection at the BARC-TIFR LINAC-Pelletron facility. 188Os, 204Pb; deduced inverse level density parameters as a function of excitation energy, and energy-dependent collective enhancement factor obtained from simultaneous fitting of the neutron spectra. 169Tm, 181Ta(α, X), E=26-40 MeV; analyzed previous experimental yields with model calculations. 187Os, 203Pb; calculated temperature dependent free energy surfaces. Comparison with statistical model calculations.

doi: 10.1103/PhysRevC.100.011602
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2017SA11      Acta Phys.Pol. B48, 623 (2017)

Sangeeta, V.Kaur

Structural Effects Through Nuclear Charge Radius in Mass Asymmetric Collisions

NUCLEAR REACTIONS 50Ca(50Ca, x), E=100 MeV/nucleon;86Kr(14N, x), E=100 MeV/nucleon; calculated free proton, neutron multiplicity vs relative impact parameter, light-mass fragment multiplicity vs different nuclear charge radius parameter using IQMD (Isospin-dependent QMD).

doi: 10.5506/APhysPolB.48.623
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2017SA43      Nucl.Phys. A966, 20 (2017)

Sangeeta, V.Kaur

Structural and isospin effects on balance energy and transition energy via different nuclear charge radii parameterizations

NUCLEAR STRUCTURE 80Cu, 80Zr; calculated neutron, proton density profile, mass and charge radius using IQMD (Isospin-dependent QMD)

NUCLEAR REACTIONS 50Ca(50Ca, x), E=30-200 MeV/nucleon;197Au(197Au, x), E=30-200 MeV/nucleon;80Cu(80Cu, x), E=40-350 MeV/nucleon;80Zr(80Zr, x), E=40-350 MeV/nucleon; calculated reduced flow, elliptical flow of Z=1 particles.

COMPILATION 80Cu(80Cu, x), 50Ca(50Ca, x), 80Zn(80Zn, x), 80Ge(80Ge, x), 80Kr(80Kr, x), 90Kr(90Kr, x), 80Zr(80Zr, x), 124Sn(124Sn, x), 150Nd(150Nd, x), 197Au(197Au, x), E not given; compiled balance energy for Z=1 particles, transition energy vs nuclear radius (separately for nuclei of N/Z=1.5 and for Atot=160); deduced simple power trend of dependence of energies vs radius.

doi: 10.1016/j.nuclphysa.2017.05.096
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2016SA09      Acta Phys.Pol. B47, 991 (2016)


Initialization Effects via Nuclear Charge Radii Parameterizations on the Nuclear Stopping and Its Relation to Distribution and Production of Light Mass Fragments

NUCLEAR REACTIONS 50Ca(50Ca, X), 90Kr(90Kr, X), 100Zr(100Zr, X), 124Sn(124Sn, X), 150Nd(150Nd, X), 197Au(197Au, X), E=50 MeV/nucleon; calculated rapidity distribution, nuclear stopping observables using IQMD model with isospin-dependent N-N σ.

doi: 10.5506/APhysPolB.47.991
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2014SA34      Nucl.Phys. A927, 220 (2014)

Sangeeta, A.Jain, S.Kumar

Influence of isospin dependent nuclear charge radii on fragmentation in heavy ion collisions

NUCLEAR REACTIONS 50Ca(50Ca, x), E=50, 400 MeV/nucleon;124Sn(124Sn, x), E=50, 400 MeV/nucleon; 197Au(197Au, x), E=50, 400 MeV/nucleon; calculated nucleonic density time development using different parameterization of nuclear radii, fragment multiplicity, fragment mass distribution using IQMD (isospin-dependent QMD). Calculated also other reactions, their results not presented.

doi: 10.1016/j.nuclphysa.2014.04.032
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