NSR Query Results

Output year order : Descending
Format : Normal

NSR database version of April 29, 2024.

Search: Author = K.Oyamatsu

Found 32 matches.

Back to query form

2023OY01      Prog.Theor.Exp.Phys. 2023, 063D03 (2023)

K.Oyamatsu

Nuclear masses and the equation of state of nuclear matter

NUCLEAR STRUCTURE A>40; analyzed available data; deduced incompressible liquid-drop (ILD) model volume, surface, symmetry, and Coulomb energies are related to the equation of state of nuclear matter using the Oyamatsu–Iida (OI) macroscopic nuclear model, which has reasonable many-body energy and isoscalar inhomogeneity gradient energy.

doi: 10.1093/ptep/ptad072
Citations: PlumX Metrics

2015SO03      Phys.Rev. C 91, 015805 (2015)

H.Sotani, K.Iida, K.Oyamatsu

Constraining the density dependence of the nuclear symmetry energy from an x-ray bursting neutron star

doi: 10.1103/PhysRevC.91.015805
Citations: PlumX Metrics

2014II01      Eur.Phys.J. A 50, 42 (2014)

K.Iida, K.Oyamatsu

Symmetry energy, unstable nuclei and neutron star crusts

doi: 10.1140/epja/i2014-14042-9
Citations: PlumX Metrics

2011II01      Prog.Theor.Phys.(Kyoto) 126, 1091 (2011)

K.Iida, K.Oyamatsu, B.Abu-Ibrahim, A.Kohama

Proton-Nucleus Total Reaction Cross Sections in the Optical Limit Glauber Theory -Subtle Dependence on the Equation of State of Nuclear Matter -

NUCLEAR REACTIONS ^112,124Sn, ⁸⁰Ni(p, X), E=40, 300, 800 MeV; calculated total σ. Glauber theory.

doi: 10.1143/PTP.126.1091
Citations: PlumX Metrics

2011NA22      Phys.Rev. C 83, 065811 (2011)

K.Nakazato, K.Iida, K.Oyamatsu

Curvature effect on nuclear "pasta": Is it helpful for gyroid appearance?

doi: 10.1103/PhysRevC.83.065811
Citations: PlumX Metrics

2010OY01      Phys.Rev. C 81, 054302 (2010)

K.Oyamatsu, K.Iida

Symmetry energy at subnuclear densities deduced from nuclear masses

NUCLEAR STRUCTURE Z=8, A=11-28; Z=12, A=17-43; Z=20, A=30-72; Z=28, A=45-100; Z=50, A=90-180; Z=82, A=175-285; calculated two proton separation energies, δV_np, influence of the density dependence of the symmetry energy on nuclear masses using a macroscopic nuclear model. Comparison with experimental data.

doi: 10.1103/PhysRevC.81.054302
Citations: PlumX Metrics

2010OY02      Phys.Rev. C 82, 027301 (2010)

K.Oyamatsu, K.Iida, H.Koura

Neutron drip line and the equation of state of nuclear matter

doi: 10.1103/PhysRevC.82.027301
Citations: PlumX Metrics

2009NA19      Phys.Rev.Lett. 103, 132501 (2009)

K.Nakazato, K.Oyamatsu, S.Yamada

Gyroid Phase in Nuclear Pasta

doi: 10.1103/PhysRevLett.103.132501
Citations: PlumX Metrics

2008KO29      Phys.Rev. C 78, 061601 (2008)

A.Kohama, K.Iida, K.Oyamatsu

Difference between interaction cross sections and reaction cross sections

NUCLEAR REACTIONS ¹²C(³He, X), (α, X), (⁶Li, X), (⁷Li, X), (⁹Be, X), (¹⁰B, X), (¹¹B, X), (¹²C, X), (¹³C, X), (¹⁴N, X), (¹⁵N, X), (¹⁶O, X), (¹⁷O, X), (¹⁸O, X), (¹⁹F, X), (²⁰Ne, X), (²¹Ne, X), (²³Na, X), (²⁴Mg, X), (²⁵Mg, X), (²⁷Al, X), (³⁵Cl, X), (³⁷Cl, X), (³⁶Ar, X), (³⁸Ar, X), (⁴⁰Ar, X), (⁸⁰Kr, X), E>800 MeV; calculated reaction σ. Comparisons with data.

doi: 10.1103/PhysRevC.78.061601
Citations: PlumX Metrics

2007KA48      Nucl.Phys. A791, 232 (2007)

H.Kanzawa, K.Oyamatsu, K.Sumiyoshi, M.Takano

Variational calculation for the equation of state of nuclear matter at finite temperatures

doi: 10.1016/j.nuclphysa.2007.01.098
Citations: PlumX Metrics

2007OY01      Phys.Rev. C 75, 015801 (2007)

K.Oyamatsu, K.Iida

Symmetry energy at subnuclear densities and nuclei in neutron star crusts

doi: 10.1103/PhysRevC.75.015801
Citations: PlumX Metrics

2005KO28      Phys.Rev. C 72, 024602 (2005)

A.Kohama, K.Iida, K.Oyamatsu

Reaction cross section described by a black sphere approximation of nuclei

NUCLEAR REACTIONS ⁴He, ^12,13C, ¹⁴N, ¹⁶O, ^20,22Ne, ^24,26Mg, ²⁸Si, ^32,34S, ³⁹K, ^40,42,44,48Ca, ^46,48Ti, ¹²⁰Sn, ²⁰⁸Pb(p, p), E ≈ 800-1100 MeV; analyzed σ(θ); deduced black-sphere radius parameters. ¹²C, ¹²⁰Sn, ²⁰⁸Pb(p, X), E ≈ 800 MeV; analyzed reaction, interaction σ.

doi: 10.1103/PhysRevC.72.024602
Citations: PlumX Metrics

2004II01      Phys.Rev. C 69, 037301 (2004)

K.Iida, K.Oyamatsu

Surface tension in a compressible liquid-drop model: Effects on nuclear density and neutron skin thickness

NUCLEAR STRUCTURE ^56,64Ni, ⁹⁰Zr, ^116,124Sn, ²⁰⁸Pb; calculated neutron and proton radii, role of surface tension. Compressible liquid-drop model.

doi: 10.1103/PhysRevC.69.037301
Citations: PlumX Metrics

2004II02      Prog.Theor.Phys.(Kyoto), Suppl. 156, 139 (2004)

K.Iida, K.Oyamatsu, B.Abu-Ibrahim

Deducing the Density Dependence of the Symmetry Energy from Unstable Nuclei

NUCLEAR REACTIONS ⁵⁸Ni(p, p), E=400, 1047 MeV; ^58,80Ni, ¹²⁴Sn, ²⁰⁸Pb(p, p), E=800 MeV; calculated σ(θ), density dependence features. Glauber model.

doi: 10.1143/PTPS.156.139
Citations: PlumX Metrics

2004KO34      Phys.Rev. C 69, 064316 (2004)

A.Kohama, K.Iida, K.Oyamatsu

Nuclear radius deduced from proton diffraction by a black nucleus

NUCLEAR REACTIONS ^58,60,62,64Ni(p, p), E ≈ 800-1050 MeV; ^90,92Zr, ¹²⁰Sn, ^144,154Sm, ¹⁷⁶Yb, ²⁰⁸Pb(p, p), E=800 MeV; analyzed σ(θ); deduced radii. Black-sphere approach.

doi: 10.1103/PhysRevC.69.064316
Citations: PlumX Metrics

2004OY01      Prog.Theor.Phys.(Kyoto), Suppl. 156, 137 (2004)

K.Oyamatsu, K.Iida

Equation of State of Nuclear Matter, Neutron Rich Nuclei in Laboratories and Pasta Nuclei in Neutron Star Crusts

NUCLEAR STRUCTURE ⁸⁰Ni; calculated matter radius.

doi: 10.1143/PTPS.156.137
Citations: PlumX Metrics

2003II02      Phys.Lett. B 576, 273 (2003)

K.Iida, K.Oyamatsu, B.Abu-Ibrahim

Proton-nucleus elastic scattering and the equation of state of nuclear matter

NUCLEAR REACTIONS ⁵⁸Ni(p, p), E=400, 1047 MeV; ^58,80Ni, ^116,124Sn, ²⁰⁸Pb(p, p), E=800 MeV; calculated σ(θ); deduced dependence on nuclear matter density parameter. Glauber model.

doi: 10.1016/j.physletb.2003.10.019
Citations: PlumX Metrics

2003OY01      Nucl.Phys. A718, 363c (2003)

K.Oyamatsu, K.Iida

Empirical properties of asymmetric nuclear matter to be obtained from unstable nuclei

NUCLEAR STRUCTURE ⁸⁰Ni; calculated matter radius vs density symmetry coefficient. Ni; calculated matter radii for N=18-64.

doi: 10.1016/S0375-9474(03)00740-1
Citations: PlumX Metrics

2003OY02      Prog.Theor.Phys.(Kyoto) 109, 631 (2003)

K.Oyamatsu, K.Iida

Saturation of Nuclear Matter and Radii of Unstable Nuclei

NUCLEAR STRUCTURE ⁹⁰Zr, ²⁰⁸Pb; calculated matter density distributions. ^58,80Ni, ^116,142Sn; calculated radii, parameter dependences, saturation properties.

doi: 10.1143/PTP.109.631
Citations: PlumX Metrics

2003SH33      Nucl.Phys. A721, 1048c (2003)

H.Shen, H.Toki, K.Oyamatsu, K.Sumiyoshi

Relativistic equation of state for supernova and neutron star

doi: 10.1016/S0375-9474(03)01282-X
Citations: PlumX Metrics

2002OY01      J.Nucl.Sci.Technol.(Tokyo) 39, 337 (2002)

K.Oyamatsu

Exploring Neutron-Star Matter using RI Beam

NUCLEAR STRUCTURE Sn; calculated radii for two equations of state. Investigation of neutron-rich nuclides with radioactive beams discussed.

doi: 10.1080/18811248.2002.9715199
Citations: PlumX Metrics

2002OY02      Prog.Theor.Phys.(Kyoto), Suppl. 146, 613 (2002)

K.Oyamatsu

A Criterion to Obtain the Equation of State of Asymmetric Nuclear Matter

doi: 10.1143/PTPS.146.613
Citations: PlumX Metrics

2001KA46      J.Nucl.Sci.Technol.(Tokyo) 38, 470 (2001)

J.-I.Katakura, T.Yoshida, K.Oyamatsu, T.Tachibana

Estimation of Beta- and Gamma-Ray Spectra for JENDL FP Decay Data File

RADIOACTIVITY ⁹⁹Sr, ^143,144Cs(β^-); calculated Eβ, Eγ. Fission product nuclei, gross theory of beta decay.

NUCLEAR REACTIONS ²⁴¹Pu(n, F), E=thermal; calculated aggregate fission product Eβ, Eγ. Comparison with data.

doi: 10.1080/18811248.2001.9715056
Citations: PlumX Metrics

2001OY01      J.Nucl.Sci.Technol.(Tokyo) 38, 477 (2001)

K.Oyamatsu, H.Takeuchi, M.Sagisaka, J.-i.Katakura

New Method for Calculating Aggregate Fission Product Decay Heat with Full Use of Macroscopic-Measurement Data

NUCLEAR REACTIONS ²³²Th(n, F)¹³⁷Cs/⁸⁶Se/⁸⁷Se/¹⁰²Zr, E fast; ²³³U(n, F)⁸⁸Kr/⁹³Sr/⁸⁹Kr/¹⁰⁰Zr/⁹²Sr, E fast; ²³⁵U(n, F)¹³³Te/¹³⁴Te/¹⁰⁰Zr/¹³²Te/⁹⁶Sr, E fast; ²³⁸U(n, F)¹⁰³Zr/¹⁰²Zr/¹⁰⁰Y, ¹³⁵Te/¹³⁶Te, E fast; ²³⁹Pu(n, F)¹⁰⁴Mo/¹⁰³Mo, E fast; ²³⁵U(n, F)¹⁴⁴Ba/¹³³Te/⁹²Sr/¹⁴⁰Cs/¹³⁴Te/¹⁰⁰Zr, E thermal; ²³⁹Pu(n, F)¹³²Sb/¹³²Te/¹⁴⁰Ba/¹³⁶Xe, E thermal; ²⁴¹Pu(n, F)¹⁰⁸Tc/¹⁰⁶Mo/¹⁰⁷Mo/¹³⁸Xe, E thermal; calculated decay heat.

doi: 10.1080/18811248.2001.9715057
Citations: PlumX Metrics

1999MB10      Nucl.Phys. (Supplement) A654, 908c (1999)

T.Maruyama, K.Niita, K.Oyamatsu, T.Maruyama, S.Chiba, A.Iwamoto

Nuclear Matter Structure Studied with Quantum Molecular Dynamics

doi: 10.1016/S0375-9474(00)88570-X
Citations: PlumX Metrics

1998MA04      Phys.Rev. C57, 655 (1998)

T.Maruyama, K.Niita, K.Oyamatsu, T.Maruyama, S.Chiba, A.Iwamoto

Quantum Molecular Dynamics Approach to the Nuclear Matter Below the Saturation Density

doi: 10.1103/PhysRevC.57.655
Citations: PlumX Metrics

1998OY01      Nucl.Phys. A634, 3 (1998)

K.Oyamatsu, I.Tanihata, Y.Sugahara, K.Sumiyoshi, H.Toki

Can the Equation of State of Asymmetric Nuclear Matter be Studied using Unstable Nuclei ( Question )

NUCLEAR STRUCTURE Z=10-90; calculated densities, neutron skin thickness. Sn; calculated neutron, proton diffuseness. ^208,266Pb; calculated neutron, proton radial distributions. Comparison of parameter sets. Implications for asymmetric nuclear matter.

doi: 10.1016/S0375-9474(98)00125-0
Citations: PlumX Metrics

1998SH24      Nucl.Phys. A637, 435 (1998)

H.Shen, H.Toki, K.Oyamatsu, K.Sumiyoshi

Relativistic Equation of State of Nuclear Matter for Supernova and Neutron Star

doi: 10.1016/S0375-9474(98)00236-X
Citations: PlumX Metrics

1998SH39      Prog.Theor.Phys.(Kyoto) 100, 1013 (1998)

H.Shen, H.Toki, K.Oyamatsu, K.Sumiyoshi

Relativistic Equation of State of Nuclear Matter for Supernova Explosion

doi: 10.1143/PTP.100.1013
Citations: PlumX Metrics

1995SU16      Nucl.Phys. A595, 327 (1995)

K.Sumiyoshi, K.Oyamatsu, H.Toki

Neutron Star Profiles in the Relativistic Brueckner-Hartree-Fock Theory

doi: 10.1016/0375-9474(95)00388-5
Citations: PlumX Metrics

1994OY01      Nucl.Phys. A578, 181 (1994)

K.Oyamatsu, M.Yamada

Shell Energies of Non-Spherical Nuclei in the Inner Crust of a Neutron Star

NUCLEAR STRUCTURE Z=20-90; N=20-140; calculated crude shell energies. Thomas-Fermi calculations, spherical, non-spherical single particle potentials, neutron star inner crust relevance.

doi: 10.1016/0375-9474(94)90975-X
Citations: PlumX Metrics

1993OY01      Nucl.Phys. A561, 431 (1993)

K.Oyamatsu

Nuclear Shapes in the Inner Crust of a Neutron Star

NUCLEAR STRUCTURE A=25-245; calculated proton number, mass excess, rms radii. ⁹⁰Zr, ²⁰⁸Pb; calculated charge distributions. Neutron star inner crust nuclear shapes relevance.

doi: 10.1016/0375-9474(93)90020-X
Citations: PlumX Metrics