NSR Query Results
Output year order : Descending NSR database version of April 27, 2024. Search: Author = R.Okamoto Found 35 matches. 2019MI17 Phys.Rev. C 100, 034310 (2019) T.Miyagi, T.Abe, M.Kohno, P.Navratil, R.Okamoto, T.Otsuka, N.Shimizu, S.R.Stroberg Ground-state properties of doubly magic nuclei from the unitary-model-operator approach with chiral two- and three-nucleon forces NUCLEAR STRUCTURE 4He, 16O, 40Ca; calculated ground-state energies, root-mean square (rms) radii, charge radii. Unitary-model-operator approach (UMOA), with similarity renormalization group (SRG) evolved nucleon-nucleon (NN) and three-nucleon (3N) interactions based on chiral effective field theory. Comparison with experimental data.
doi: 10.1103/PhysRevC.100.034310
2018SK01 Phys.Rev. C 97, 014002 (2018) R.Skibinski, J.Golak, K.Topolnicki, H.Witala, Yu.Volkotrub, H.Kamada, A.M.Shirokov, R.Okamoto, K.Suzuki, J.P.Vary Nucleon-deuteron scattering with the JISP16 potential NUCLEAR REACTIONS 2H(polarized p, p), (polarized n, n), (n, p), (polarized p, 2p), 1H(polarized d, d), E=5, 13, 65, 135 MeV; calculated differential elastic σ(θ), deuteron vector and tensor analyzing powers iT11, T22, differential cross section for deuteron breakup process. Nucleon-nucleon J-matrix inverse scattering potential JISP16 for elastic nucleon-deuteron scattering and the deuteron breakup process using the formalism of Faddeev equations. Comparison with experimental data, and with theoretical calculations using CD Bonn, Argonne AV18, and the chiral forces. NUCLEAR STRUCTURE 2H; calculated ground state energies, 3S1 and 3D1 state probabilities for deuteron, potential and kinetic energies for various NN interactions. 3H; calculated binding energy, potential and kinetic energies for various NN interactions.
doi: 10.1103/PhysRevC.97.014002
2017MI18 Phys.Rev. C 96, 054312 (2017) T.Miyagi, T.Abe, R.Okamoto, T.Otsuka Introduction of the one-body correlation operator in the unitary-model-operator approach NUCLEAR STRUCTURE 4He; calculated ground-state energy, point-nucleon rms matter radii, total, one-body, two-body, and three-body energies, One-body density matrix using nucleon-nucleon (NN) interactions from Argonne (AV18) and chiral effective field theory (χEFT) up to the next-to-next-to-next leading order (N3LO), and Unitary-model-operator approach (UMOA) with one-body correlations, and diagonalization of unitary-transformed Hamiltonians in the 0p0h and 1p1h space.
doi: 10.1103/PhysRevC.96.054312
2015MI09 Prog.Theor.Exp.Phys. 2015, 041D01 (2015) T.Miyagi, T.Abe, Ry.Okamoto, T.Otsuka Ground-state energies and charge radii of 4He, 16O, 40Ca, and 56Ni in the unitary-model-operator approach NUCLEAR STRUCTURE 4He, 16O, 40Ca, 56Ni; calculated ground state energies, charge radii. Unitary-model-operator approach, comparison with experimental data.
doi: 10.1093/ptep/ptv042
2014SU08 Phys.Rev. C 89, 044003 (2014) K.Suzuki, H.Kumagai, R.Okamoto, M.Matsuzaki Recursion method for deriving an energy-independent effective interaction
doi: 10.1103/PhysRevC.89.044003
2013SU06 Phys.Rev. C 87, 024001 (2013) K.Suzuki, H.Kumagai, M.Matsuzaki, R.Okamoto Formulation of an effective interaction in terms of renormalized vertices and propagators
doi: 10.1103/PhysRevC.87.024001
2012KO27 Phys.Rev. C 86, 014317 (2012) 4He energies and radii calculated by the coupled-cluster method with a many-body average potential NUCLEAR STRUCTURE 4He; calculated ground state energies, rms radii. Coupled-cluster method (CCM) calculations with AV18 and CD-Bonn interactions. Contribution of the three-nucleon force to the ground-state energy.
doi: 10.1103/PhysRevC.86.014317
2011SU06 Phys.Rev. C 83, 024304 (2011) K.Suzuki, R.Okamoto, H.Kumagai, S.Fujii Graphical method for deriving an effective interaction with a new vertex function
doi: 10.1103/PhysRevC.83.024304
2009FU10 Phys.Rev.Lett. 103, 182501 (2009) Ground-State and Single-Particle Energies of Nuclei around 16O, 40Ca, and 56Ni from Realistic Nucleon-Nucleon Forces NUCLEAR STRUCTURE 16O, 40Ca, 56Ni; calculated ground and single-particle states, binding energies in ab initio approach; deduced agreement between CD-Bonn nucleon-nucleon potential and experimental results.
doi: 10.1103/PhysRevLett.103.182501
2007KA42 Nucl.Phys. A790, 398c (2007) H.Kamada, S.Fujii, E.Uzu, M.Yamaguchi, R.Okamoto, Y.Koike Low-momentum nucleon-nucleon potential and its separability NUCLEAR STRUCTURE 3H; calculated binding energy; analyzed dependence on cutoff parameter. Low-momentum effective potential.
doi: 10.1016/j.nuclphysa.2007.03.070
2007KO72 Phys.Rev. C 76, 064002 (2007) M.Kohno, R.Okamoto, H.Kamada, Y.Fujiwara Equivalent hyperon-nucleon interactions in low-momentum space
doi: 10.1103/PhysRevC.76.064002
2006KA18 Prog.Theor.Phys.(Kyoto) 115, 839 (2006) H.Kamada, S.Fujii, E.Uzu, M.Yamaguchi, R.Okamoto, Y.Koike Separability of a Low-Momentum Effective Nucleon-Nucleon Potential NUCLEAR STRUCTURE 3H; calculated binding energy.
doi: 10.1143/PTP.115.839
2005OK01 Int.J.Mod.Phys. E14, 21 (2005) Formal relation among various hermitian and non-hermitian effective interactions
doi: 10.1142/S0218301305002734
2004FU04 Phys.Rev. C 69, 034328 (2004) Charge-dependent calculations of single-particle energies in nuclei around 16O with modern nucleon-nucleon interactions NUCLEAR STRUCTURE 3H, 3,4He; calculated binding energies. 15N, 15,16,17O, 17F; calculated single-particle energies, spin-orbit splitting. Comparisons with data.
doi: 10.1103/PhysRevC.69.034328
2004FU20 Phys.Rev. C 70, 024003 (2004) S.Fujii, E.Epelbaum, H.Kamada, R.Okamoto, K.Suzuki, W.Glockle Low-momentum nucleon-nucleon interaction and its application to few-nucleon systems NUCLEAR STRUCTURE 2H; calculated binding energy, D-state probability. 3H, 4He; calculated binding energies, cutoff parameter dependences.
doi: 10.1103/PhysRevC.70.024003
2002FU18 Phys.Rev. C 66, 054301 (2002) Shell-model calculations for Λ16O and Λ17O using microscopic effective interactions with Σ degrees of freedom NUCLEAR STRUCTURE 16,17O; calculated hypernucleus levels, J, π, configurations. Shell model.
doi: 10.1103/PhysRevC.66.054301
2000FU05 Nucl.Phys. A670, 277c (2000) Lambda-Nucleon Effective Interaction in Unitary-Model Operator Approach NUCLEAR STRUCTURE 17O; calculated hypernucleus single-particle levels, related features.
doi: 10.1016/S0375-9474(00)00112-3
2000FU11 Prog.Theor.Phys.(Kyoto) 104, 123 (2000) Three-Body Cluster Effects on Λ Single-Particle Energies in Λ17O and Λ41Ca NUCLEAR STRUCTURE 17O, 41Ca; calculated Λ hyperon single-particle energies, three-body cluster effects.. Unitary-model-operator approach.
doi: 10.1143/PTP.104.123
2000SU03 Nucl.Phys. A665, 92 (2000) K.Suzuki, R.Okamoto, M.Kohno, S.Nagata Exact Treatment of the Pauli Exclusion Operator in Nuclear Matter Calculation
doi: 10.1016/S0375-9474(99)00399-1
1999FU06 Nucl.Phys. A651, 411 (1999); Erratum Nucl.Phys. A676, 475 (2000) Unitary-Model-Operator Approach to Λ Hypernuclei NUCLEAR STRUCTURE 17O; calculated hypernucleus single-particle energies, matrix elements. Unitary-model-operator approach.
doi: 10.1016/S0375-9474(99)00139-6
1997HA35 Prog.Theor.Phys.(Kyoto) 97, 417 (1997); Erratum Prog.Theor.Phys.(Kyoto) 98, 1011 (1997) M.Hasegawa, S.Tazaki, R.Okamoto Instability of the HF Ground State in 56Ni Caused by α-Like Four-Nucleon Correlations NUCLEAR STRUCTURE 56Ni; calculated ground-state stability conditions with respect to 4p-4h excitations; deduced instability. Hartree-Fock calculations.
doi: 10.1143/PTP.97.417
1997KU32 Prog.Theor.Phys.(Kyoto) 97, 1023 (1997) H.Kumagai, K.Suzuki, R.Okamoto Ground-State Properties of 40Ca in Unitary-Model-Operator Approach with Realistic Nucleon-Nucleon Potentials NUCLEAR STRUCTURE 40Ca; calculated ground state, single-particle energies, charge radius. Unitary-model-operator approach.
doi: 10.1143/PTP.97.1023
1995HA21 Nucl.Phys. A592, 45 (1995) M.Hasegawa, S.Tazaki, R.Okamoto Condensed Structure of J = T = 0 α-Like Clusters in f7/2-Shell Even-Even Nuclei with N = Z NUCLEAR STRUCTURE 44Ti, 48Ca, 52Fe, 56Ni; calculated single particle levels approximate occupation probabilities; deduced α-like correlations related features. Microscopic approach.
doi: 10.1016/0375-9474(95)00296-D
1995KU02 Nucl.Phys. A582, 205 (1995) T.T.S.Kuo, F.Krmpotic, K.Suzuki, R.Okamoto Summation of Time-Dependent Folded Diagrams for Effective Interactions with a Non-Degenerate Model Space
doi: 10.1016/0375-9474(94)00456-W
1995SU32 Prog.Theor.Phys.(Kyoto) 93, 905 (1995) Effective Operators in Time-Independent Approach
doi: 10.1143/ptp/93.5.905
1994DE16 Nucl.Phys. A575, 46 (1994) H.de Guise, D.J.Rowe, R.Okamoto The Role of Spin in the Strong Coupling of a Rotor and Single Particle
doi: 10.1016/0375-9474(94)90136-8
1994SU25 Nucl.Phys. A580, 213 (1994) K.Suzuki, R.Okamoto, H.Kumagai Many-Body Theory in Terms of Effective Interactions and Its Relation to Coupled-Cluster Method
doi: 10.1016/0375-9474(94)90770-6
1994SU35 Prog.Theor.Phys.(Kyoto) 92, 1045 (1994) Effective Interaction Theory and Unitary-Model-Operator Approach to Nuclear Saturation Problem NUCLEAR STRUCTURE 16O; calculated binding energy per nucleon, charge radii, single particle energies, l.s splitting. Unitary model operator approach, different potentials.
doi: 10.1143/ptp/92.6.1045
1987SU08 Prog.Theor.Phys.(Kyoto) 77, 196 (1987) K.Suzuki, R.Okamoto, H.Kumagai Effects of Self-Consistent Single-Particle Potential on Nuclear Effective Interaction NUCLEAR STRUCTURE 16O; calculated ground-state, 1p1/2, 1p3/2 orbit one-body energies; deduced self-consistent potential role. Unitary model operator approach.
doi: 10.1143/PTP.77.196
1987SU12 Phys.Rev. C36, 804 (1987) K.Suzuki, R.Okamoto, H.Kumagai Nuclear Ground-State Properties and Nuclear Forces in Unitary-Model-Operator Approach: Application to 16O NUCLEAR STRUCTURE 16O; calculated binding energy, charge radius, single-particle energies. Unitary model operator approach.
doi: 10.1103/PhysRevC.36.804
1986SU13 Prog.Theor.Phys.(Kyoto) 75, 1388 (1986) Unitary-Model-Operator Approach to Nuclear Many-Body Problem. I - The Ground-State and One-Body Energies of 16O - NUCLEAR STRUCTURE 16O; calculated ground state, single particle energies. Unitary model operator approach.
doi: 10.1143/PTP.75.1388
1986SU16 Prog.Theor.Phys.(Kyoto) 76, 127 (1986) Unitary-Model-Operator Approach to Nuclear Many-Body Problem. II. - Three-Body-Cluster Effects on Properties of 16O - NUCLEAR STRUCTURE 16O; calculated ground, one-body state energies. 16O deduced three body cluster effects. Unitary model operator approach.
doi: 10.1143/PTP.76.127
1977OK04 Progr.Theor.Phys. 58, 376 (1977) Low-Lying Collective States in Odd-Mass I, Cs, La and Pr N = 80 Isotones NUCLEAR STRUCTURE 133I, 135Cs, 137La, 139Pr; calculated low-lying collective states.
doi: 10.1143/PTP.58.376
1975KU11 Progr.Theor.Phys. 53, 489 (1975) A.Kuriyama, T.Marumori, K.Matsuyanagi, R.Okamoto Microscopic Structure of a New Type of Collective Excitation in Odd-Mass Mo, Ru, I, Cs and La Isotopes NUCLEAR STRUCTURE 129,131I, 131,133Cs, 133,135La, 95,97,99Mo, 97,99,101Ru; calculated B(E2).
doi: 10.1143/PTP.53.489
1971KU28 Progr.Theor.Phys. 46, 1420 (1971) A.Kuriyama, M.Hasegawa, S.Tazaki, R.Okamoto A Note on Pairing Vibrational Motion
doi: 10.1143/PTP.46.1420
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