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NSR database version of May 20, 2024.

Search: Author = C.Ishizuka

Found 23 matches.

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2024IV01      Phys.Rev. C 109, 034602 (2024)

F.A.Ivanyuk, C.Ishizuka, S.Chiba

Five-dimensional Langevin approach to fission of atomic nuclei

doi: 10.1103/PhysRevC.109.034602
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2024TU02      Eur.Phys.J. A 60, 25 (2024)

A.Tudora, K.Fujio, C.Ishizuka, S.Chiba

Prompt emission calculations for 239Pu(nth, f) with the DSE model code and a pre-neutron fragment distribution Y(A, TKE) based on the four-dimensional Langevin model

NUCLEAR REACTIONS 239Pu(n, F), E thermal; calculated independent fission product yields (FPY) and other distributions of pre- and post-neutron fragments, prompt neutron multiplicity distributions. Comparison with available data.

doi: 10.1140/epja/s10050-024-01232-7
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2023EB02      Int.J.Mod.Phys. E32, 2350030 (2023)

S.Ebata, S.Okumura, C.Ishizuka, S.Chiba

The difference between charge polarizations of fission fragments deduced by the static theoretical model and in the current data library

NUCLEAR REACTIONS 235U(n, F), E low; analyzed available data; deduced a theoretical method to deduce the charge polarization (CP) and most probable charge for fission fragments for the selected range of mass numbers based on a quantum many-body framework, namely, a constrained Skyrme Hartree-Fock+BCS model.

doi: 10.1142/S0218301323500301
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2023IW01      J.Nucl.Sci.Technol.(Tokyo) 60, 1 (2023)

O.Iwamoto, N.Iwamoto, S.Kunieda, F.Minato, S.Nakayama, Y.Abe, K.Tsubakihara, S.Okumura, C.Ishizuka, T.Yoshida, S.Chiba, N.Otuka, J.-C.Sublet, H.Iwamoto, K.Yamamoto, Y.Nagaya, K.Tada, C.Konno, N.Matsuda, K.Yokoyama, H.Taninaka, A.Oizumi, M.Fukushima, S.Okita, G.Chiba, S.Sato, M.Ohta, S.Kwon

Japanese evaluated nuclear data library version 5: JENDL-5

NUCLEAR REACTIONS 233,235,238U, 237Np, 238,239,240,242Pu, 241,243Am, 243,244,245,246Cm(n, F), (n, γ), E<20 MeV; analyzed available data; deduced σ, average energies of prompt fission neutrons, prompt neutron multiplicities. Neutron sublibrary for all of stable and unstable isotopes with the half-lives longer than 1 day for Z<101 except 257Es. Comparison with JENDL-4.0, ENDF/B-VIII.0 and EXFOR libraries.

doi: 10.1080/00223131.2022.2141903
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2022AN24      Eur.Phys.J. A 58, 254 (2022)

D.Antonopoulou, E.Bozzo, C.Ishizuka, D.I.Jones, M.Oertel, C.Providencia, L.Tolos, S.Typel

CompOSE: a repository for neutron star equations of state and transport properties

doi: 10.1140/epja/s10050-022-00908-2
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2022IS04      Phys.Rev. C 105, 064314 (2022)

C.Ishizuka, H.Takemoto, Y.Chiba, A.Ono, N.Itagaki

Role of tensor interaction as salvation of cluster structure in 44Ti

NUCLEAR STRUCTURE 44Ti; calculated energy curves and rms matter radius for the 0+ state as a function of the distance between 4He and 40Ca using antisymmetrized quasicluster model (AQCM) and iSMT model, with tensor interaction; discussed competition of spin-orbit and tensor effects in the medium-heavy region nuclei. Comparison with theoretical predictions of Brink Model, and with experimental data. Relevance to ongoing experimental projects to investigate knockout α clusters from medium-heavy nuclei.

doi: 10.1103/PhysRevC.105.064314
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2022IV05      Nucl.Phys. A1028, 122526 (2022)

F.A.Ivanyuk, S.V.Radionov, C.Ishizuka, S.Chiba

The memory effects in the Langevin description of nuclear fission

doi: 10.1016/j.nuclphysa.2022.122526
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2022KO07      Prog.Theor.Exp.Phys. 2022, 023D02 (2022)

T.Kouno, C.Ishizuka, T.Inakura, S.Chiba

Pairing strength in the relativistic mean-field theory determined from the fission barrier heights of actinide nuclei and verified by pairing rotation and binding energies

NUCLEAR STRUCTURE 16O, 40,48Ca, 56,58Ni, 88Sr, 90Zr, 112,124,132Sn, 146Gd, 208Pb, 234,236U, 240,242Pu, 242,244Cm; calculated binding energies, diffraction radii, surface thickness, pairing rotation energy, fission barriers using BCS pair correlation as a residual interaction in relativistic mean-field theory. Comparison with available data.

doi: 10.1093/ptep/ptab167
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2022KO28      Int.J.Mod.Phys. E31, 2250080 (2022)

T.Kouno, C.Ishizuka, K.Fujio, T.Inakura, S.Chiba

Effects of triaxiality and pairing interaction on fission barriers of actinide nuclei

NUCLEAR STRUCTURE 232,234,236,238,240U, 232,234Pu, 238,240,242,244Pu, 242,244,246,248Cm; calculated fission barriers. Comparison with available data.

doi: 10.1142/S021830132250080X
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2022TY01      Eur.Phys.J. A 58, 221 (2022)

S.Typel, M.Oertel, T.Klahn, D.Chatterjee, V.Dexheimer, C.Ishizuka, M.Mancini, J.Novak, H.Pais, C.Providencia, Ad.R.Raduta, M.Servillat, L.Tolos, for the CompOSE Core Collaboration

CompOSE reference manual

doi: 10.1140/epja/s10050-022-00847-y
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2021SH36      Phys.Rev. C 104, 054609 (2021)

K.Shimada, C.Ishizuka, F.A.Ivanyuk, S.Chiba

Dependence of total kinetic energy of fission fragments on the excitation energy of fissioning systems

NUCLEAR REACTIONS 235U(n, F)236U*,239Pu(n, F)240Pu*, E=thermal MeV; calculated mass distribution of fission fragments, fission product yields, and compared with experimental results and with data in JENDL/FPY-2011 library. 235U(n, F)236U*,239Pu(n, F)240Pu*, E<50 MeV; calculated average total kinetic energy (TKE) of fission fragments, quadrupole moment (Q20) of fission fragments just after scission, dependence of average quadrupole moment (Q20) and average octupole (Q30) of fission fragments, distance between the center of mass of the nascent fragments just after scission using method based on the four-dimensional Langevin equations. Comparison with experimental data. Relevance to decrease of average total kinetic energy of fission fragments as the excitation energy of the compound nuclei increases, as indicated by experimental data of neutron-induced fission reactions.

doi: 10.1103/PhysRevC.104.054609
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2020IS01      Phys.Rev. C 101, 011601 (2020)

C.Ishizuka, X.Zhang, M.D.Usang, F.A.Ivanyuk, S.Chiba

Effect of the doubly magic shell closures in 132Sn and 208Pb on the mass distributions of fission fragments of superheavy nuclei

NUCLEAR STRUCTURE 274Hs, 280Ds, 286Cn, 292Fl, 296Lv, 294Og, 302120, 306122; calculated fission fragment mass distributions for the excitation energy 10 and 30 MeV as a function of fragment mass number; deduced effect of doubly magic nuclei 132Sn and 208Pb on the mass distributions of fission fragments of superheavy nuclei 236U, 240Pu, 244Cm, 252Cf, 256,257,258,259,264Fm, 260Md, 259Lr, 274Hs, 286Cn, 292Fl, 296Lv, 294Og, 302120, 306122; calculated distribution of quadrupole deformation Q20 as function of fission fragment mass number. Calculations used dynamical four-dimensional Langevin approach.

doi: 10.1103/PhysRevC.101.011601
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2020OH04      Prog.Theor.Exp.Phys. 2020, 063D01 (2020)

A.Ohnishi, C.Ishizuka, K.Tsubakihara, Y.Hirata

Statistical double Λ hypernuclear formation from Ξ-absorption at rest in light nuclei

NUCLEAR REACTIONS 12C, 14N, 16O(Ξ-, X)6He/10Be/13B, E at rest; analyzed available data; deduced formation probabilities.

doi: 10.1093/ptep/ptaa047
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2018IV04      Phys.Rev. C 97, 054331 (2018)

F.A.Ivanyuk, C.Ishizuka, M.D.Usang, S.Chiba

Temperature dependence of shell corrections

NUCLEAR STRUCTURE 236U; calculated temperature dependence of shell corrections and averaged in deformation to the energy, entropy and free energy for protons and neutrons of 236U g.s. with and without pairing effects using mean-field approximation; deduced more accurate approximation for the shell corrections to energy and free energy. A=50-250; calculated pairing critical temperature for protons and neutrons along the β-stability line.

NUCLEAR REACTIONS 232Th, 238U(n, F), E=32.8, 45.3, 59.9 MeV; calculated fission fragment mass distributions using new shell corrections to the liquid drop energy and deformed Woods-Saxon potential. Comparison with experimental values and predictions from previous shell corrections.

doi: 10.1103/PhysRevC.97.054331
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2017IS16      Phys.Rev. C 96, 064616 (2017)

C.Ishizuka, M.D.Usang, F.A.Ivanyuk, J.A.Maruhn, K.Nishio, S.Chiba

Four-dimensional Langevin approach to low-energy nuclear fission of 236U

NUCLEAR REACTIONS 235U(n, F), E=14 MeV; 257Fm(n, F), E=thermal; calculated mass distribution of fission fragments, fission events on the mass-TKE plane, TKE distributions. 235U(n, F), E=0.5, 3.5, 5.5, 8.5, 13.5 MeV; calculated TKE of fission fragments, contour map of prescission kinetic energy as a function of mass number of fission fragments, distribution of deformation parameter in its dependence on the mass number. Four-dimensional (4D) Langevin model with infinite-depth two-center shell-model (TCSM) potential and the finite-depth two-center Woods-Saxon (TCWS) potential. Comparison with experimental data in JENDL/FPY-2011 data library.

doi: 10.1103/PhysRevC.96.064616
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2017US02      Phys.Rev. C 96, 064617 (2017)

M.D.Usang, F.A.Ivanyuk, C.Ishizuka, S.Chiba

Analysis of the total kinetic energy of fission fragments with the Langevin equation

NUCLEAR REACTIONS 235U(n, F), E=14 MeV; 257Fm(n, F), E=thermal; 231Pa, 238U, 239Pu(n, F), E<45 MeV; calculated mass distribution and the total kinetic energy (TKE) of fission fragments at various excitation energies within the three-dimensional Langevin approach with microscopic transport coefficients; deduced systematic trends of TKE with Z2/A1/3 of the fissioning system. Comparison with evaluated post-neutron distributions data stored in JENDL library.

doi: 10.1103/PhysRevC.96.064617
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2016US04      Phys.Rev. C 94, 044602 (2016)

M.D.Usang, F.A.Ivanyuk, C.Ishizuka, S.Chiba

Effects of microscopic transport coefficients on fission observables calculated by the Langevin equation

NUCLEAR STRUCTURE 234,236U, 240Pu; calculated fission fragment mass distribution, total kinetic energy, microscopic transport coefficients for fission of compound nuclei at an excitation energy of 20 MeV. Three-dimensional Langevin model. Comparison with experimental data.

doi: 10.1103/PhysRevC.94.044602
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2010OH03      Nucl.Phys. A835, 374c (2010)

A.Ohnishi, K.Tsubakihara, K.Sumiyoshi, C.Ishizuka, S.Yamada, H.Suzuki

EOS of hyperonic matter for core-collapse supernovae

doi: 10.1016/j.nuclphysa.2010.01.222
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2010SU32      Nucl.Phys. A835, 295c (2010)

K.Sumiyoshi, K.Nakazato, C.Ishizuka, A.Ohnishi, S.Yamada, H.Suzuki

Emergence of hyperons in failed supernovae with short neutrino bursts

doi: 10.1016/j.nuclphysa.2010.01.205
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2004IS18      Prog.Theor.Phys.(Kyoto), Suppl. 156, 152 (2004)

C.Ishizuka, A.Ohnishi, K.Sumiyoshi, S.Yamada

Finite Temperature Effects on Supernova Explosion Energy and Hyperon Composition

doi: 10.1143/PTPS.156.152
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2003IS08      Nucl.Phys. A723, 517 (2003)

C.Ishizuka, A.Ohnishi, K.Sumiyoshi

Liquid-gas phase transition of supernova matter and its relation to nucleosynthesis

doi: 10.1016/S0375-9474(03)01324-1
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2002IS14      Prog.Theor.Phys.(Kyoto), Suppl. 146, 373 (2002)

C.Ishizuka, A.Ohnishi, K.Sumiyoshi

Fragment Distribution in Coexistence Phase of Supernova Matter

doi: 10.1143/PTPS.146.373
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2002IS15      Prog.Theor.Phys.(Kyoto), Suppl. 146, 569 (2002)

C.Ishizuka, A.Ohnishi, K.Sumiyoshi

Nucleosynthesis and Characteristics in Liquid-Gas Coexistence Phase of Supernova Matter

doi: 10.1143/PTPS.146.569
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