Nuclear Science References (NSR)

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NSR database version of April 27, 2024.

Search: Author = C.Ishizuka

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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(n_th, 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, ^{238,239,240,242}Pu, ^241,243Am, ^{243,244,245,246}Cm(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 ^{232,234,236,238,240}U, ^232,234Pu, ^{238,240,242,244}Pu, ^{242,244,246,248}Cm; 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, ^{256,257,258,259,264}Fm, 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/A^1/3 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