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for journal 'PTP'
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author 'R.* Okamoto' : 23
total : 23
Search Results : 23 articles were found.
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Progress of Theoretical Physics Vol. 46 No. 5 (1971) pp. 1420-1439
: (4)
- A Note on Pairing Vibrational Motion
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Atsushi Kuriyama, Munetake Hasegawa, Shigeru Tazaki and Ryoji Okamoto
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Progress of Theoretical Physics Vol. 52 No. 6 (1974) pp. 1819-1840
: (4)
- Theory of Collective Excitations in Spherical Odd-Mass Nuclei. IV
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Atsushi Kuriyama, Toshio Marumori, Kenichi Matsuyanagi and Ryoji Okamoto
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Progress of Theoretical Physics Vol. 53 No. 2 (1975) pp. 489-503
: (4)
- Microscopic Structure of a New Type of Collective Excitation in Odd-Mass Mo, Ru, I, Cs and La Isotopes
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Atsushi Kuriyama, Toshio Marumori, Kenichi Matsuyanagi and Ryoji Okamoto
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Progress of Theoretical Physics Vol. 58 No. 1 (1977) pp. 376-378
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- Low-Lying Collective States in Odd-Mass, I, Cs, La and Pr $N = 80$ Isotones
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Ryoji Okamoto
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Progress of Theoretical Physics Vol. 63 No. 3 (1980) pp. 1058-1062
: (4)
- Hamamoto's Remedy for the Band Crossing Anomalies in the Cranking Model
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Yoshihide Tanaka, Ryoji Okamoto and Shota Suekane
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Progress of Theoretical Physics Vol. 70 No. 2 (1983) pp. 439-451
: (4)
- Degenerate Perturbation Theory in Quantum Mechanics
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Kenji Suzuki and Ryoji Okamoto
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Progress of Theoretical Physics Vol. 70 No. 2 (1983) pp. 606-608
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- Stability Condition for the Hartree-Fock-Bogoliubov Ground State under Constraints
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Ryoji Okamoto and Kenji Suzuki
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Progress of Theoretical Physics Vol. 71 No. 3 (1984) pp. 670a-670a
: (4)
- Degenerate Perturbation Theory in Quantum Mechanics
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Kenji Suzuki and Ryoji Okamoto
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Progress of Theoretical Physics Vol. 71 No. 6 (1984) pp. 1221-1238
: (4)
- General Structure of Effective Interaction in Degenerate Perturbation Theory
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Kenji Suzuki and Ryoji Okamoto
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Progress of Theoretical Physics Vol. 72 No. 3 (1984) pp. 534-548
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- Perturbation Theory for Quasidegenerate System in Quantum Mechanics
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Kenji Suzuki and Ryoji Okamoto
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Progress of Theoretical Physics Vol. 75 No. 6 (1986) pp. 1388-1404
: (4)
- Unitary-Model-Operator Approach to Nuclear Many-Body Problem. I
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Kenji Suzuki and Ryoji Okamoto
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Progress of Theoretical Physics Vol. 76 No. 1 (1986) pp. 127-142
: (4)
- Unitary-Model-Operator Approach to Nuclear Many-Body Problem. II
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Kenji Suzuki and Ryoji Okamoto
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Progress of Theoretical Physics Vol. 77 No. 2 (1987) pp. 196-200
: (4)
- Effects of Self-Consistent Single-Particle Potential on Nuclear Effective Interaction
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Kenji Suzuki, Ryoji Okamoto and Hiroo Kumagai
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Progress of Theoretical Physics Vol. 90 No. 1 (1993) pp. 257-261
: (4)
- Ground-State Properties of $^{16}$O in Unitary-Model-Operator Approach with Bonn Potential
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Kenji Suzuki, Hiroo Kumagai and Ryoji Okamoto
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Progress of Theoretical Physics Vol. 91 No. 2 (1994) pp. 403-408
: (4)
- Approximate Treatment of Hermitian Effective Interactions and a Bound on the Error
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Ryoji Okamoto, Kenji Suzuki, P.J. Ellis, Jifa Hao, Zibang Li and T.T.S. Kuo
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Progress of Theoretical Physics Vol. 92 No. 6 (1994) pp. 1045-1080
: (4)
- Effective Interaction Theory and Unitary-Model-Operator Approach to Nuclear Saturation Problem
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Kenji Suzuki and Ryoji Okamoto
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Progress of Theoretical Physics Vol. 93 No. 5 (1995) pp. 905-917
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- Effective Operators in Time-Independent Approach
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Kenji Suzuki and Ryoji Okamoto
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Progress of Theoretical Physics Vol. 97 No. 3 (1997) pp. 417-435
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- Instability of the HF Ground State in $^{56}$Ni Caused by $\alpha$-Like Four-Nucleon Correlations
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Munetake Hasegawa, Shigeru Tazaki and Ryoji Okamoto
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Progress of Theoretical Physics Vol. 97 No. 6 (1997) pp. 1023-1028
: (4)
- Ground-State Properties of $^{40}$Ca in Unitary-Model-Operator Approach with Realistic Nucleon-Nucleon Potentials
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Hiroo Kumagai, Kenji Suzuki and Ryoji Okamoto
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Progress of Theoretical Physics Vol. 98 No. 4 (1997) pp. 1011-1011
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- Instability of the HF Ground State in $^{\boldsymbol {56}}$Ni Caused by $\boldsymbol{\alpha}$-Like Four-Nucleon Correlations
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Munetake Hasegawa, Shigeru Tazaki and Ryoji Okamoto
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Progress of Theoretical Physics Vol. 99 No. 1 (1998) pp. 151-156
: (4)
- Unitary-Model-Operator Approach to $\boldsymbol{_{\Lambda}^{17}}$O and Lambda-Nucleon Effective Interaction
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Shinichiro Fujii, Ryoji Okamoto and Kenji Suzuki
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Progress of Theoretical Physics Vol. 104 No. 1 (2000) pp. 123-141
: (4)
- Three-Body Cluster Effects on ${\boldsymbol \Lambda}$ Single-Particle Energies in $_{\boldsymbol \Lambda}^{\boldsymbol {17}}$O and $_{\boldsymbol \Lambda}^{\boldsymbol {41}}$Ca
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Shinichiro Fujii, Ryoji Okamoto and Kenji Suzuki
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Progress of Theoretical Physics Vol. 115 No. 4 (2006) pp. 839-844
: (4)
- Separability of a Low-Momentum Effective Nucleon-Nucleon Potential
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Hiroyuki Kamada, Shinichiro Fujii, Eizo Uzu, Masahiro Yamaguchi, Ryoji Okamoto and Yasuro Koike