NSR Query Results
Output year order : Descending NSR database version of April 11, 2024. Search: Author = K.Sekizawa Found 19 matches. 2023BI02 Eur.Phys.J. A 59, 60 (2023) R.Biswas, S.Nath, J.Gehlot, Gonika, C.Kumar, A.Parihari, N.Madhavan, A.Vinayak, A.Mahato, S.Noor, P.Sherpa, K.Sekizawa Determination of 1p- and 2p-stripping excitation functions for ^{16}O+^{142}Ce using a recoil mass spectrometer NUCLEAR REACTIONS ^{142}Ce(^{16}O, ^{15}N), (^{16}O, ^{14}C), E=57-69 MeV; measured reaction products, TOF; deduced σ(θ). Comparison with finite-range CRC model calculations performed using the code fresco. 15UD Pelletron accelerator at IUAC, New Delhi.
doi: 10.1140/epja/s10050-023-00975-z
2022MA28 Phys.Rev. C 105, 064602 (2022) P.Magierski, A.Makowski, M.C.Barton, K.Sekizawa, G.Wlazlowski Pairing dynamics and solitonic excitations in collisions of medium-mass, identical nuclei NUCLEAR REACTIONS ^{90}Zr(^{90}Zr, X), ^{96}Zr(^{96}Zr, X), E(cm)=180-200 MeV; calculated time evolution of neutron average pairing gap and the quadrupole moment in head-on collision of superfluid nuclei. Time-dependent density functional theory (TDDFT) extended to superfluid systems, known as the time-dependent superfluid local density approximation (TDSLDA).
doi: 10.1103/PhysRevC.105.064602
2022RO09 Phys.Rev. C 105, 044611 (2022) B.J.Roy, S.Santra, A.Pal, H.Kumawat, S.K.Pandit, V.V.Parkar, K.Ramachandran, K.Mahata, K.Sekizawa Reaction mechanism study for multinucleon transfer processes in collisions of spherical and deformed nuclei at energies near and above the Coulomb barrier: The ^{16}O + ^{154}Sm reaction NUCLEAR REACTIONS ^{154}Sm(^{16}O, X)^{6}Li/^{7}Li/^{10}B/^{11}B/^{12}C/^{13}C/^{13}N/^{14}N/^{15}N/^{9}Be/^{16}O/^{17}O/^{18}O, E=85, 134 MeV; measured reaction products, projectile-like fragments, angular distributions; deduced σ(θ), σ(E), Q, total kinetic energy loss (TKEL) by fragments, optical potential parameters. Studied the orientation effect in multinucleon transfer processes. Compared with theoretical calculations based on time-dependent Hartree-Fock (TDHF)combined with a statistical model, GEMINI++.BARC-TIFR Pelletron-Linac facility.
doi: 10.1103/PhysRevC.105.044611
2022SE04 Phys.Rev. C 105, 045807 (2022) K.Sekizawa, S.Kobayashi, M.Matsuo Time-dependent extension of the self-consistent band theory for neutron star matter: Anti-entrainment effects in the slab phase
doi: 10.1103/PhysRevC.105.045807
2020AY07 Phys.Rev. C 102, 064619 (2020) Kinetic-energy dissipation and fluctuations in strongly damped heavy-ion collisions within the stochastic mean-field approach NUCLEAR REACTIONS ^{208}Pb(^{136}Xe, X), E(cm)=526 MeV; calculated diffusion and friction coefficients for radial linear momentum, total kinetic energy (TKE), and total kinetic energy loss (TKEL) distributions using time-dependent Hartree-Fock (TDHF) and stochastic mean-field (SMF) theories; deduced strongly damped collisions at around the Coulomb barrier.
doi: 10.1103/PhysRevC.102.064619
2020BA14 Acta Phys.Pol. B51, 605 (2020) M.C.Barton, S.Jin, P.Magierski, K.Sekizawa, G.Wlazlowski, A.Bulgac Pairing Dynamics in Low-Energy Nuclear Collisions
doi: 10.5506/APhysPolB.51.605
2020SE12 Phys.Rev. C 102, 014620 (2020) Quantal diffusion approach for multinucleon transfer processes in the ^{58, 64}Ni + ^{208}Pb reactions: Toward the production of unknown neutron-rich nuclei NUCLEAR REACTIONS ^{208}Pb(^{58}Ni, X), E(cm)=270 MeV; ^{208}Pb(^{64}Ni, X), E(cm)=268 MeV; calculated average mass and charge of reaction products, total kinetic energy loss (TKEL), contact time, diffusion coefficients and covariances for neutron and proton transfers, and production σ for primary and secondary products using three-dimensional time-dependent Hartree-Fock (TDHF) with Skyrme SLy4d functional, and stochastic mean field (SMF) approaches, supplemented with statistical model GEMINI++.
doi: 10.1103/PhysRevC.102.014620
2019SE08 Phys.Rev. C 99, 051602 (2019) Time-dependent Hartree-Fock plus Langevin approach for hot fusion reactions to synthesize the Z = 120 superheavy element NUCLEAR REACTIONS ^{254}Fm(^{48}Ca, X)^{302}120^{*}, E(cm)=212.8, 255.4 MeV; ^{248}Cm(^{54}Cr, X)^{302}120^{*}, E(cm)=243.2, 291.8 MeV; ^{249}Bk(^{51}V, X)^{300}120^{*}, E(cm)=237.0, 284.4 MeV; ^{257}Fm(^{48}Ca, X)^{305}120^{*}, E(cm)=212.4, 254.9 MeV; calculated distance of closest approaches, and dissipated energies using time-dependent Hartree-Fock (TDHF) method with Skyrme interactions; calculated evaporation residue formation probabilities using Langevin with statistical (fusion by diffusion) models.
doi: 10.1103/PhysRevC.99.051602
2018MA44 Acta Phys.Pol. B49, 281 (2018) P.Magierski, J.Grineviciute, K.Sekizawa Pairing Dynamics and Time-dependent Density Functional Theory
doi: 10.5506/aphyspolb.49.281
2018RO04 Phys.Rev. C 97, 034603 (2018) B.J.Roy, Y.Sawant, P.Patwari, S.Santra, A.Pal, A.Kundu, D.Chattopadhyay, V.Jha, S.K.Pandit, V.V.Parkar, K.Ramachandran, K.Mahata, B.K.Nayak, A.Saxena, S.Kailas, T.N.Nag, R.N.Sahoo, P.P.Singh, K.Sekizawa Deep-inelastic multinucleon transfer processes in the ^{16}O + ^{27}Al reaction NUCLEAR REACTIONS ^{27}Al(^{16}O, ^{16}O), (^{16}O, ^{6}Li), (^{16}O, ^{7}Li), (^{16}O, ^{7}Be), (^{16}O, ^{9}Be), (^{16}O, ^{10}B), (^{16}O, ^{11}B), (^{16}O, ^{12}C), (^{16}O, ^{13}C), (^{16}O, ^{14}N), (^{16}O, ^{15}N), E=134 MeV; measured reaction products, σ(θ) for elastic-scattering and for various transfer channels, total kinetic energy loss spectra at the TIFR Pelletron-LINAC accelerator facility, Mumbai; deduced Q value, and angle-integrated production cross sections for various proton-transfer channels. Comparison with calculated production cross sections using time-dependent Hartree-Fock (TDHF) theory and recently developed method TDHF+GEMINI, and secondary deexcitation processes using a statistical model GEMINI++. Discussed possible interplay between fusion-fission, deep-inelastic, multinucleon transfer, and particle evaporation processes.
doi: 10.1103/PhysRevC.97.034603
2018WI01 Phys.Rev.Lett. 120, 022501 (2018) E.Williams, K.Sekizawa, D.J.Hinde, C.Simenel, M.Dasgupta, I.P.Carter, K.J.Cook, D.Y.Jeung, S.D.McNeil, C.S.Palshetkar, D.C.Rafferty, K.Ramachandran, A.Wakhle Exploring Zeptosecond Quantum Equilibration Dynamics: From Deep-Inelastic to Fusion-Fission Outcomes in ^{58}Ni + ^{60}Ni Reactions NUCLEAR REACTIONS ^{58,60}Ni(^{58}Ni, X), E=158.4 MeV; measured reaction products; deduced σ, σ(θ, E). Comparison with theoretical predictions using time dependent Hartree-Fock and time dependent random phase approximation approaches, which, respectively, incorporate one-body energy dissipation and fluctuations.
doi: 10.1103/PhysRevLett.120.022501
2017MA38 Phys.Rev.Lett. 119, 042501 (2017) P.Magierski, K.Sekizawa, G.Wlazlowski Novel Role of Superfluidity in Low-Energy Nuclear Reactions NUCLEAR REACTIONS ^{240}Pu(^{240}Pu, X), ^{90}Zr(^{90}Zr, X), E>190 MeV; calculated total kinetic energy (TKE) of the outgoing fragments, fusion threshold energy.
doi: 10.1103/PhysRevLett.119.042501
2017SE12 Phys.Rev. C 96, 014615 (2017) Microscopic description of production cross sections including deexcitation effects NUCLEAR REACTIONS ^{124}Sn(^{40}Ca, X), E(cm)=128.54 MeV; ^{124}Sn(^{48}Ca, X), E(cm)=125.44 MeV; ^{208}Pb(^{40}Ca, X), E(cm)=208.84 MeV; ^{208}Pb(^{58}Ni, X), E(cm)=256.79 MeV; ^{238}U(^{64}Ni, X), E(cm)=307.35 MeV; ^{198}Pt(^{136}Xe, X), E(cm)=644.98 MeV; calculated production σ for secondary products in low-energy heavy ion reactions. Time-dependent Hartree-Fock (TDHF) + GEMINI model. Comparison with available experimental data, and with GRAZING calculations. Relevance to quest for new neutron-rich isotopes.
doi: 10.1103/PhysRevC.96.014615
2017SE17 Phys.Rev. C 96, 041601 (2017) Enhanced nucleon transfer in tip collisions of^{238}U + ^{124}Sn NUCLEAR REACTIONS ^{238}U(^{124}Sn, X), E(cm)=300-1200 MeV; calculated production cross sections for the lighter fragments, density contours in head-on collisions, dynamics of neck formation and breaking, particle transfers using microscopic framework of the time-dependent Hartree-Fock (TDHF) theory. Comparison with experimental cross section data. Relevance to production of new neutron-rich heavy and superheavy nuclei.
doi: 10.1103/PhysRevC.96.041601
2016SE07 Phys.Rev. C 93, 054616 (2016) Time-dependent Hartree-Fock calculations for multinucleon transfer and quasifission processes in the ^{64}Ni + ^{238}U reaction NUCLEAR REACTIONS ^{238}U(^{64}Ni, X), E(cm)=277-495 MeV; calculated multinucleon transfer (MNT) and quasifission (QF) dynamics for three orientations of ^{238}U, scattering angles, total kinetic energy (TKE), contact time, mass and charge of reaction products, density contours, production cross sections in proton-transfers channels (up to six protons), Mass-angle distribution (MAD) plots. Three-dimensional time-dependent Hartree-Fock (TDHF) calculations with Skyrme SLy5 energy density functional (EDF) for various initial conditions. Comparison with available experimental data.
doi: 10.1103/PhysRevC.93.054616
2016WL01 Phys.Rev.Lett. 117, 232701 (2016) G.Wlazlowski, K.Sekizawa, P.Magierski, A.Bulgac, M.McNeil Forbes Vortex Pinning and Dynamics in the Neutron Star Crust
doi: 10.1103/PhysRevLett.117.232701
2015SO17 Phys.Rev. C 92, 024603 (2015) Sonika, B.J.Roy, A.Parmar, U.K.Pal, H.Kumawat, V.Jha, S.K.Pandit, V.V.Parkar, K.Ramachandran, K.Mahata, A.Pal, S.Santra, A.K.Mohanty, K.Sekizawa Multinucleon transfer study in ^{206}Pb(^{18}O, x) at energies above the Coulomb barrier NUCLEAR REACTIONS ^{206}Pb(^{18}O, ^{20}O), (^{18}O, ^{19}O), (^{18}O, ^{17}O), (^{18}O, ^{16}O), (^{18}O, ^{18}N), (^{18}O, ^{17}N), (^{18}O, ^{16}N), (^{18}O, ^{15}N), (^{18}O, ^{14}N), (^{18}O, ^{16}C), (^{18}O, ^{15}C), (^{18}O, ^{14}C), (^{18}O, ^{13}C), (^{18}O, ^{12}C), (^{18}O, ^{12}B), (^{18}O, ^{11}B), (^{18}O, ^{10}B), (^{18}O, ^{10}Be), (^{18}O, ^{9}Be), (^{18}O, ^{18}O)E=139 MeV; measured particle spectra, elastic σ(θ), total kinetic energy loss (TKEL) spectra, angular distributions at Pelletron-LINAC accelerator of BARC-TIFR facility; deduced Q values and angle integrated cross sections. Comparison with fully microscopic time-dependent Hartree-Fock (TDHF) calculations, based on the independent single-nucleon transfer mode. Discussed effect of particle evaporation on the production cross sections, and possible origin of discrepancies.
doi: 10.1103/PhysRevC.92.024603
2014SE23 Phys.Rev. C 90, 064614 (2014) Particle-number projection method in time-dependent Hartree-Fock theory: Properties of reaction products NUCLEAR REACTIONS ^{16}O(^{24}O, X)^{14}C/^{15}N/^{16}O/^{17}O/^{18}O/^{25}F/^{22}O/^{23}O/^{24}O/^{26}Ne, E=2, 4, 8 MeV/nucleon; calculated deflection angle, TKEL, transfer probabilities with respect to target-like fragments (TLF) and projectile-like fragments (PLF), expectation values of the angular momentum operator for fragment nuclei as function of the distance of closest approach, average excitation energies of fragment nuclei. Time-dependent Hartree-Fock (TDHF) theory in three-dimensional Cartesian grid representation combined with particle-number projection method for one- and two-nucleon removal reactions.
doi: 10.1103/PhysRevC.90.064614
2013SE10 Phys.Rev. C 88, 014614 (2013); Erratum Phys.Rev. C 93, 029902 (2016) Time-dependent Hartree-Fock calculations for multinucleon transfer processes in ^{40, 48}Ca+^{124}Sn, ^{40}Ca+^{208}Pb, and ^{58}Ni+^{208}Pb reactions NUCLEAR REACTIONS ^{124}Sn(^{40}Ca, X), (^{48}Ca, X), E=170, 174 MeV; ^{208}Pb(^{40}Ca, X), E=235, 249 MeV; ^{208}Pb(^{58}Ni, X), E=328.4 MeV; calculated total energy loss (TKEL), σ and σ(θ) for transfer channels, average number of nucleons transferred and transfer probabilities, N/Z ratios for multinucleon transfer reactions. Time-dependent Hartree-Fock (TDHF) calculations. Comparison with experimental data, and with other calculations.
doi: 10.1103/PhysRevC.88.014614
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