NSR Query Results
Output year order : Descending NSR database version of April 11, 2024. Search: Author = A.K.Kumar Found 12 matches. 2019MA89 Acta Phys.Pol. B50, 377 (2019) I.Mazumdar, M.Dhibar, S.P.Weppner, G.Anil Kumar, A.K.R.Kumar, S.M.Patel, P.B.Chavan, C.D.Bagdia, L.C.Tribedi Studies in Nuclear Structure and Big Bang Nucleosynthesis Using Proton Beams NUCLEAR REACTIONS ^{12}C(p, p'γ), E=8-22 MeV; measured Eγ, Iγ; deduced total σ, σ(θ); calculated total σ and s(θ) using coupled-channels model and single particle model taking into account resonances in ^{12}C. ^{2}H(p, γ), E=100, 175, 250 keV; measured Eγ, Iγ; deduced σ, astrophysical S-factor.
doi: 10.5506/aphyspolb.50.377
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 ^{181}Ta, ^{197}Au(^{11}B, X)^{192}Pt^{*}/^{208}Pb^{*}, 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. ^{188}Os, ^{204}Pb; 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. ^{169}Tm, ^{181}Ta(α, X), E=26-40 MeV; analyzed previous experimental yields with model calculations. ^{187}Os, ^{203}Pb; calculated temperature dependent free energy surfaces. Comparison with statistical model calculations.
doi: 10.1103/PhysRevC.100.011602
2018DE02 Phys.Rev. C 97, 014317 (2018) B.Dey, C.Ghosh, D.Pandit, A.K.R.Kumar, S.Pal, V.Nanal, R.G.Pillay, P.Arumugam, S.De, G.Gupta, H.Krishnamoorthy, E.T.Mirgule, S.Pal, P.C.Rout Study of the Jacobi shape transition in A ≈ 30 nuclei NUCLEAR REACTIONS ^{12}C(^{19}F, X)^{28}Si*, E=127 MeV; ^{12}C(^{16}O, X)^{31}P*, E=125 MeV; measured fold-gated high-energy Eγ, Iγ using an array of seven closely-packed hexagonal BaF_{2} detectors, and a 14-element BGO multiplicity filter at Pelletron Linac Facility (PLF), Mumbai. ^{28}Si, ^{31}P; deduced average angular momentum, energy, width and strength of giant dipole resonances (GDR), Jacobi shape transition in ^{31}P; calculated free energy surfaces. Comparison with thermal shape fluctuation model (TSFM).
doi: 10.1103/PhysRevC.97.014317
2017GH06 Phys.Rev. C 96, 014309 (2017) C.Ghosh, A.K.R.Kumar, B.Dey, V.Nanal, R.G.Pillay, P.Arumugam, K.V.Anoop, N.Dokania, A.Garai, G.Gupta, E.T.Mirgule, G.Mishra, D.Mondal, S.Pal, M.S.Pose, P.C.Rout Giant dipole resonance studies in Ba isotopes at E/A ≈ 5 MeV NUCLEAR REACTIONS ^{112}Sn(^{12}C, X)^{124}Ba*, E=64 MeV; ^{124}Sn(^{12}C, X)^{136}Ba*, E=52 MeV/nucleon; measured Eγ, Iγ, γγ-coin, multiplicity, giant dipole resonance (GDR) strength functions at TIFR-Mumbai Pelletron Linac Facility. ^{124,136}Ba; deduced GDR parameters of centroids, widths and nuclear deformation parameter β using simulated Monte Carlo statistical model analysis; calculated the free energy surfaces (FESs) at different temperatures and angular momenta. Comparison with thermal shape fluctuation model (TSFM) calculations.
doi: 10.1103/PhysRevC.96.014309
2017KU16 Phys.Rev. C 96, 024322 (2017) A.K.R.Kumar, P.Arumugam, N.Dinh Dang, I.Mazumdar Giant dipole resonance and shape transitions in hot and rotating ^{88}Mo NUCLEAR REACTIONS ^{40}Ca(^{48}Ti, X)^{88}Mo*/^{86}Zr/^{84}Zr/^{80}Sr/^{76}Kr/^{74}Se/^{70}Ge/^{68}Ge, E=300, 600 MeV; calculated giant-dipole resonance (GDR) cross sections within the thermal shape fluctuation model (TSFM) for different daughter nuclei formed at different temperatures and angular momenta. Comparison of experimental GDR cross sections and widths for ^{88}Mo with the TSFM calculations. ^{88}Mo; calculated free energy surfaces (FES) in (β_{2}, γ) plane as functions of temperature and angular momentum.
doi: 10.1103/PhysRevC.96.024322
2016GH09 Phys.Rev. C 94, 014318 (2016) C.Ghosh, G.Mishra, A.K.R.Kumar, N.Dokania, V.Nanal, R.G.Pillay, Suresh Kumar, P.C.Rout, S.Joshi, P.Arumugam Temperature dependence of the giant dipole resonance width in ^{152}Gd NUCLEAR REACTIONS ^{124}Sn(^{28}Si, X)^{152}Gd*, E=135 MeV; measured Eγ, Iγ, γγ-coin at TIFR-BARC Pelletron Linac facility; deduced GDR centroids, widths, average angular momentum for oblate and prolate deformations. Comparison with thermal shape fluctuation model (TSFM) calculations with and without including thermal fluctuations.
doi: 10.1103/PhysRevC.94.014318
2016KU24 Phys.Rev. C 94, 049802 (2016) Reply to "Comment on 'Thermal shape fluctuation model study of the giant dipole resonance in ^{152}Gd' "
doi: 10.1103/PhysRevC.94.049802
2015KU11 Phys.Rev. C 91, 044305 (2015) A.K.R.Kumar, P.Arumugam, N.Dinh Dang Effects of thermal shape fluctuations and pairing fluctuations on the giant dipole resonance in warm nuclei NUCLEAR STRUCTURE ^{97}Tc, ^{120}Sn, ^{179}Au, ^{208}Pb; calculated average pairing gap and average quadrupole deformation parameter as function of temperature, probability distribution for gap parameter of protons and neutrons, free energy surface contours in (β, γ) plane, giant-dipole resonance (GDR) strength functions. Thermal shape fluctuation model (TSFM) extended to include the fluctuations in the pairing field. Comparison with experimental data.
doi: 10.1103/PhysRevC.91.044305
2015KU27 Phys.Rev. C 92, 044314 (2015) Thermal shape fluctuation model study of the giant dipole resonance in ^{152}Gd NUCLEAR STRUCTURE ^{152}Gd; analyzed experimental σ, GDR widths, free energy surfaces (FES) in (β_{2}, γ) plane as functions of temperature and angular momentum in ^{124}Sn(^{28}Si, X)^{152}Gd*, E=149, 185 MeV reaction; calculated average deformation and probability distribution of ^{152}Gd shapes. Discussed occurrence of γ softness in the free energy surfaces of ^{152}Gd and its role on GDR. Thermal shape fluctuation model (TSFM) built on the microscopic-macroscopic calculations of the free energies with a macroscopic approach for GDR.
doi: 10.1103/PhysRevC.92.044314
2014KU24 Phys.Rev. C 90, 044308 (2014) A.K.R.Kumar, P.Arumugam, N.Dinh Dang Pairing effect in the thermal shape-fluctuation model on the width of the giant dipole resonance NUCLEAR STRUCTURE ^{97}Tc, ^{120}Sn, ^{208}Pb; calculated neutron and proton pairing gaps, widths of giant dipole resonances (GDR), free energy surface contours, shell effects and fluctuations of the pairing field dependence on temperature using the thermal shape-fluctuation model (TSFM). Comparison with experimental results.
doi: 10.1103/PhysRevC.90.044308
2014MU11 J.Phys.(London) G41, 115103 (2014) I.Mukul, A.Roy, P.Sugathan, J.Gehlot, G.Mohanto, S.Nath, N.Madhavan, R.Dubey, T.Banerjee, N.Saneesh, I.Mazumdar, D.A.Gothe, A.K.R.Kumar, P.Arumugam, M.Kaur Decoupling the effect of temperature on GDR widths in excited compound nucleus ^{144}Sm NUCLEAR REACTIONS ^{116}Cd(^{28}Si, X)^{144}Sm, E=170, 196.5 MeV; measured reaction products, Eγ, Iγ; deduced fusion σ, giant dipole resonance parameters. Thermal shape fluctuation model calculations.
doi: 10.1088/0954-3899/41/11/115103
2013IS10 Phys.Rev. C 88, 024312 (2013) Ish Mukul, A.Roy, P.Sugathan, J.Gehlot, G.Mohanto, N.Madhavan, S.Nath, R.Dubey, I.Mazumdar, D.A.Gothe, M.Kaur, A.K.R.Kumar, P.Arumugam Effect of angular momentum on giant dipole resonance observables in the ^{28}Si+^{116}Cd reaction NUCLEAR REACTIONS ^{116}Cd(^{28}Si, X)^{144}Sm*, E=125, 140 MeV; measured Eγ, Iγ, γγ-coin, time-of-flight, fold distribution using 4π spin spectrometer at Pelletron facility of IUAC; deduced γ-ray multiplicity, angular momentum distribution, average angular momentum, GDR energies, centroids, widths, deformation parameter, and strength distribution. Statistical model analysis using CASCADE computer code. Comparison with thermal shape fluctuation model (TSFM)calculations. ^{144}Sm; calculated potential energy surface contours at different angular momenta and temperatures in (β, γ) plane.
doi: 10.1103/PhysRevC.88.024312
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