研究活動  (最終更新年月日=2020.4．15)
（最近の主な研究テーマ）

 現代的高精度の2体核力，3体核力を用いた二重閉殻核の基底状態の計算(結合エネルギー，荷電半径)

 

（過去の研究テーマ）

低運動量模型空間内における有効核力

現実的核力に基づく原子核における新魔法数（殻構造の進化）に関する研究

無限核物質の飽和性ー結合エネルギーと荷電半径ー

有効相互作用理論

中重原子核における回転運動の微視的理論

拘束条件付き集団的振動運動の安定条件

中重奇数質量数の原子核における低励 起集団運動の微視的研究

原子核における対振動の研究

 

論文：

57) Ground-state properties of doubly magic nuclei from the unitary-model-operator approach with the chiral  two- and three-nucleon Forces,

T. Miyagi, T. Abe, M. Kohno, P. Navr´atil, R. Okamoto, T. Otsuka, N. Shimizu, S. R. Stroberg

Phys. Rev. C 100, 034310 – Published 13 September 2019

　　https://journals.aps.org/prc/abstract/10.1103/PhysRevC.100.034310

https://arxiv.org/pdf/1901.11106.pdf

56) Nucleon-deuteron scattering with the JISP16 potential

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, 

https://journals.aps.org/prc/abstract/10.1103/PhysRevC.97.014002

https://arxiv.org/pdf/1706.03846.pdf

 

55) Introduction of the one-body correlation operator in the unitary-model-operator approach

    T. Miyagi1, T. Abe, R. Okamoto, T. Otsuka,

Phys. Rev. C96, 054312(2017)

        https://journals.aps.org/prc/abstract/10.1103/PhysRevC.96.054312

       https://arxiv.org/pdf/1708.00177.pdf

 

54) Ground-state energies and charge radii of 4He, 16O, 40Ca, and 56Ni in the unitary-model-operator approach

T. Miyagi1, T. Abe, R. Okamoto, T. Otsuka,

Prog. Theor. Exp. Phys. 2015, 041D01

https://academic.oup.com/ptep/article/2015/4/041D01/1524178

 

53) Recursion method for deriving an energy-independent effective interaction

       K. Suzuki, H. Kumagai, R. Okamoto, M. <atsuzaki

        Phys. Rev. C89, 044003(2014)

　　　　https://journals.aps.org/prc/abstract/10.1103/PhysRevC.89.044003

　　　　https://arxiv.org/pdf/1402.2723.pdf

 

52) Formulation of an effective intercation in terms of renormalized vertices and propagators

       K. Suzuki, H. Kumagai, M. Matsuzaki, R. Okamoto,

        Phys. Rev. C87, 024400(2013)

       https://arxiv.org/pdf/1210.5028.pdf

 

51） Graphical method for deriving effective interaction with a new vertex function

        K. Suzuki, R. Okamoto, H. Kumagai, S. Fujii

        Phys. Rev. C83, 024304(2011)

50） A new solution for effective interaction  または

　　　http://iopscience.iop.org/1742-6596/267/1/012017/

      R. Okamoto, K. Suzuki, H. Kumagai, S. Fujii

      J. Phys.; Conf. Ser. 267,　012017(2011).

49）  Ground-state and single-particle energies of nuclei around 16O, 40Ca, and 56Ni

 from realistic nucleon-nucleon froces

S. Fujii,　R. Okamoto, and K. Suzuki

Phys. Rev. Lett., Vol.113, 182501-1-4(2009)

48）Low-momentum nucleon-nucleon potential and its separability

H. Kamada, S. Fujii, E. Uzu, M. Yamaguchi, R. Okamoto and Y. Koike,

Nucl. Phys.　A790, 398c-401c(2007)

47) Equivalent hyperon-nucleon interactions in low-momentum space  

M. Kohno, R. Okamoto, H. Kamada, Y. Fujiwara, 

Phys. Rev. C76, No.6, 064002-1−8(2007)
46）Separability of Low-Momentum Effective Nucleon-Nucleon Potential、　
　　　 Prog. Theor. Phys. Vol. 115, No.4, 839-844 (2006).
      H. Kamada, S. Fujii, E. Uzu, M. Yamaguchi, R. Okamoto and Y. Koike
45）The unitary-model operator approach to nuclear many-body problem

J. of  Phys.: Conf. Ser. Vol.49, 83-88(2005)

S. Fujii, R. Okamoto, K. Suzuki

44）　Formal Relation among  Various　Ｈｅrmitian and non-Ｈｅrmitian Ｅffective Ｉteractions
　　　 R. Okamoto, S. Fujii,  and  K. Suzuki
       Int. J. Mod. Phys. E., Vol. 14, 21, (2005)      

43) Dependence of Nuclear Binding Energies on the Cutoff Momentum of Low-Momentum
     Nucleon-Nucleon Interaction,
      S. Fujii, H. Kamada, R. Okamoto, K. Suzuki
        Proceedings of the 8th International Spring Seminar on Nuclear Physics on Key Topics
       in Nuclear Structure, Paestum, Italy, May 2004 (World Scientific, Singapore, 2005, pp.~117-124)
        http://xxx.yukawa.kyoto-u.ac.jp/PS_cache/nucl-th/pdf/0406/0406082.pdf
42)　Low-momentum nucleon-nucleon interaction and its application to the Faddeev
        and Yakubovsky calculations for few-nucleon systems,
        S. Fujii, E. Epelbaum, H. Kamada, R. Okamoto, K. Suzuki and W. Gloeckle,
          Phys. Rev. C70, 024003 (2004).
         http://link.aps.org/abstract/PRC/v70/e024003

41) Shell structures in oxygen isotopes described with modern nucleon-nucleon interactions,

        S. Fujii, R. Okamoto, K. Suzuki,
           Proceedings of the International Symposium on A New Era of
            Nuclear Structure Physics (NENS03),Niigata, November 2003,
            (World Scientific, Singapore, 2004, pp. 70-74)
40)　Charge-dependent calculations of single-particle energies in nuclei around 16O
        with modern nucleon-nucleon interactions  　
　　   S. Fujii, R. Okamoto,  and K. Suzuki,

Phys. Rev. C69 (2004),034328-1-13

39) Shell-model calculations for Λ16$O and Λ1７O using microscopic effective
　　interactions with  degrees of freedom　(pdf file)
       S. Fujii, R.Okamoto and K. Suzuki 
          Phys. Rev. C66 (2002), 054301-10
38) Three-Body Cluster Effects on Λ Single-Particle Energies inΛ1７O
    and　Λ41Ca,
    S. Fujii, R. Okamoto and K. Suzuki
   Prog. Theor. Phys. 104 (2000), 123-141.
37) Exact treatment of the Pauli exclusion operator in nuclear matter calculation,
    K. Suzuki, R. Okamoto, M. Kohno and S. Nagata,
    Nucl. Phys. A665(2000), 92-104.

http://inspirehep.net/record/503642/

https://arxiv.org/pdf/nucl-th/9907050.pdf
36) Unitary-Model-Operator Approach to ΛHypernuclei
    S. Fujii, R. Okamoto and K. Suzuki
    Nucl. Phys. A651 (1999), 411-433.
35) Unitary-Model-Operator Approach to Λ17O and Lambda-Nucleon Effective     
    Interaction,
    S. Fujii, R. Okamoto and K. Suzuki,
    Prog. Theor. Phys. 99 (1998), 151.
34) Ground-State Properties of 40Ca in Unitary-Model-Operator
    Approach with Realistic Nucleon-Nucleon Potentials,
    H. Kumagai, K. Suzuki and R. Okamoto,
    Prog.Theor.Phys.97(1997),1023-28.
33) Instability of the HF Ground State in 56Ni Caused by α- Like Four-Nucleon Correlations
    M. Hasegawa, S. Tazaki and R. Okamoto,
    Prog. Theor. Phys. 97(1997),.417-435.
32) Condensed  structure of  J=T=0 α-like clusters in f7/2-shell even-even nuclei with N=Z
    M. Hasegawa, S. Tazaki and R. Okamoto
    Nucl. Phys. A592(1995), 45 -58.
31) Effective Operator in Time-Independent Approach
    K. Suzuki and R. Okamoto
    Prog. Theor. Phys. 93(1995), 905-917.
30) Effective Interaction Theory and Unitary-Model-Operator Approach to Nuclear Saturation   
    Problem
    K. Suzuki and R. Okamoto
    Prog. Theor. Phys. 92(1994), 1045-1080.(invited paper)
29) Summation of time-dependent folded diagrams for effective interactions with non-degenerate
      model space
    T. T. S. Kuo, F. Krmpotic, K. Suzuki and  R. Okamoto
    Nucl.Phys.A582(1994), 205-222.
28) Many-body theory  in terms of effective  interactions and its relation to coupled-cluster
    method
    K. Suzuki, R. Okamoto and H. Kumagai
    Nucl. Phys. A580(1994), 213-235.
27) The role of spin in the strong  coupling of a  rotor and single  particle
    H. de Guise, D.J. Rowe and R. Okamoto
    Nucl Phys. A575(1994), 46-60.
26) Unitary-Model-Operator Approach to Nuclear Many-Body Theory
    K. Suzuki, R. Okamoto and H. Kumagai
    Phys. Rep. 242(1994), 181-190.
25) Approximate Treatment of Hermitian Effective Interaction and a Bound on the Error
    R. Okamoto, K. Suzuki, Paul J. Ellis, J. Hao, Z. Li and T. T. S. Kuo
    Prog. Theor. Phys. 91(1994), 403-408.
24) Iterative Solution for Effective Interactions in System with Non-Degenerate  Unperturbed   
     Energies
    K. Suzuki, R. Okamoto, P. J. Ellis and T. T. S. Kuo.
    Nucl. Phys. A.567(1994), 576-590.
23) Ground-State Properties of ^{16}O in Unitary-Model-Operator Approach with Bonn Potential
    K. Suzuki, H. Kumagai and R. Okamoto
    Prog.Theor.Phys.90(1993), 257-261.
22) Hermitian Effective Interactions Derived from the Paris and Bonn Potentials
    T. T. S. Kuo, P. J. Ellis, J. Hao, Z. Li, K. Suzuki, R. Okamoto and H. Kumagai
    Nucl. Phys. A560(1993), 621-633.
21) Origin of and Bound on the Non-Hermiticity of Effective Interactions
    K. Suzuki, R. Okamoto, P.J. Ellis, J. Hao, Z. Liand, T. T.S. Kuo
    Phys. Lett. B308 (1993), 1-5.
20) Semi-microscopic theory of quantized rotational and intrinsic motions in deformed nuclei
    R. Okamoto and M. Nakano
    Nucl. Phys.A550 (1992), 112-142.
19) Nuclear Ground-State Properties and Nuclear Forces in the Unitary-Model-Operator   
     Approach
    K. Suzuki, R. Okamoto and H. Kumagai
    Phys. Rev. C36(1987), 804-819.
18) 有効相互作用の理論と原子核多体問題
    鈴木賢二、岡本良治
    日本物理学会誌, ４２巻, ３号 (1987), 263-270.
17) Effects of Self-Consistent Single-Particle Potential on Nuclear Effective  Interaction
    K. Suzuki, R. Okamoto and H. Kumagai,

    Prog. Theor. Phys. 77(1987), 196-200.
16) Unitary-Model-Operator Approach to Nuclear Many-Body Problem. II
    - Three-Body-Cluster Effects on Properties of 16O-
    K. Suzuki and R. Okamoto
    Prog. Theor. Phys. 76(1986), 127-142.

https://academic.oup.com/ptp/article/76/1/127/1908322
15) Unitary-Model-Operator Approach to Nuclear Many- Body Problem. I
    - The Ground-State and One-Body Energies of 16O-
    K. Suzuki and R. Okamoto
    Prog.Theor.Phys.75(1984), 1388-1404.

https://doi.org/10.1143/PTP.75.1388
14) Perturbation Theory for Quasidegenerate System in  Quantum Mechanics
    K. Suzuki and R. Okamoto
    Prog.Theor.Phys.72(1984), 534-548
13) General Structure of Effective  Interaction in Degenerate Perturbation Theory
    K. Suzuki and R. Okamoto
    Prog. Theor. Phys. 71(1984),1221-1238.
12) Stability Condition for  the Hartree-Fock-Bogoliubov Ground State under Constraints
    R. Okamoto and K. Suzuki
    Prog.Theor.Phys.70(1983), 606-609.

https://academic.oup.com/ptp/article/70/2/606/1941549

11) Degenerate Perturbation Theory in Quantum Mechanics
    K. Suzuki and R. Okamoto
    Prog. Theor. Phys. 70(1983), 439-452.
10) A Schematic-Model Analysis of Band Crossing Difficulties in the Cranking Model
    R. Okamoto
    Bulletin of the Kyushu Institute of Technology(M.&N.S.), No.30(1983), .37-54
 9) Hamamoto's Remedy for the Band Crossing Anomalies in the Cranking Model
    Y. Tanaka, R. Okamoto and S. Suekane
    Prog.Theor.Phys.Vol.63(1980), 1058-1061.
 8) Microscopic Structure of Low-lying Collective Excited States in Odd-Neutron Te, Xe and Ba
    Isotopes,
    R. Okamoto
    Memoirs of the Faculty of Science, Kyushu University, Series B, Vol.5, No.4,(1978), 103-133
 7) Low-Lying Collective Excitation in Odd-Mass I, Cs, La and Pr N=80 Isotones
    R. Okamoto
    Prog.Theor.Phys.58(1977), 376-377.

 6) Microscopic Structure of  Breaking and Persistency of "Phonon-Odd-Quasiparticle Picture"
    A. Kuriyama, T. Marumori, K. Matsuyanagi, R. OkamotoT. Suzuki
    Prog. Theor. Phys. Suppl. No.58(1975),138-159.
 5) Persistency of AC State-Like Structure in Collective Excitations
       -Odd-Mass Mo, Ru, I, Cs and La Isotopes -
   A. Kuriyama, T. Marumori, K. Matsuyanagi and R. Okamoto
   Prog.Theor.Phys.Suppl.No.58(1975), 103-137
 4) Theory of Intrinsic Modes of Excitation in Odd-Mass Nuclei
   A. Kuriyama, T. Marumori, K. Matsuyanagi and R. Okamoto
   Prog.Theor.Phys.Suppl.No.58(1975), 32-52.
 ３) Microscopic Structure of a New Type of Collective Excitation in Odd-Mass Mo, Ru, I, Cs
      and La  Isotopes
   A. Kuriyama, T. Marumori, K. Matsuyanagi and R. Okamoto
   Prog. Theor. Phys.53(1975), 489-503
 2) Theory of Collective Excitation in Spherical Odd-Mass Nuclei, IV
   A. Kuriyama, T. Marumori, K. Matsuyanagi and R. Okamoto
   Prog.Theor.Phys.52(1974), 1819-1840.
 1) A Note on Pairing Vibrational Motion,
   A. Kuriyama, M. Hasegawa, S. Tazaki and R. Okamoto
   Prog.Theor.Phys.46(1971), 1420-1439.
 
国際会議録等:
・ Ground-State Properties and Nuclear Effective Interaction in Unitary-Model-Operator
   Approach
　R. Okamoto, K. Suzuki and H. Kumagai
　Proceedings of the 9th International Conference on  Recent Progress in Many-Body
  Theories,(World Scientific, Singapore, 1998) pp.234-237.
・Effective Interaction Theory and Unitary-Model-Operator Approachto Ground-State Properties
  in Finite Nuclei,
　R. Okamoto, ,K. Suzuki and H. Kumagai
　Proceedings of the XVII RCNP International Symposium on Innovative Computational Methods in
  Nuclear　Many-Body Problems, (World Scientific, Singapore, 1998) pp.168-170.
・Unitary-Model-Operator Approach to $ _{\Lambda}^{17}$O and Single-Particle Energy of Lambda
　S. Fujii, R. Okamoto and K. Suzuki
　Proceedings of the XVII RCNP International Symposium on Innovative Computational Methods   
  in  Nuclear Many-Body Problems, (World Scientific, Singapore, 1998) pp. 171-173.
・Lambda-Nucleon Effective Interaction in Unitary-Model-Operator Approach
　S. Fujii, R. Okamoto and K. Suzuki
　Proceedings of the KEK-Tanashi International Symposium on Physicsof Hadrons and Nuclei,
(to   be published in a special issue of Nucl. Phys. A by Elsevier Science).
・Energy-Independent and Hermitian ${\Lambda}$N Effective Interaction and Properties of ${\Lambda}$
 in 　Hypernuclei
　S. Fujii, R. Okamoto and K. Suzuki
　Proceedings of the APCTP Workshop on Strangeness Nuclear Physics (SNP'99),
  (to be published    by World 　Scientific).

 
著書：

6) 岡本良治「スピンと角運動量」共立出版、2014年．

5)　森　茂康、岡本良治、豊島耕一、本庄春雄、三好永作
　「原発事故緊急対策マニュアルー放射能汚染から身をまもるために」合同出版、2011年。
4)　大橋　健、岡本良治、栗山次郎（編著）、向後千春、小谷　享、菅　隆明、中川慎二、柳沢浩哉、山本信也、揚　子江
  「理 科系の日本語作文技法」、朝倉書店、1999年。
3)　鈴木賢二、山田知司、田中洋介、岡本良治「ファイリングノート　力学演習」学術図書、1991年。
2)　森　茂康、岡本良治、押川元重、酒井嘉子、豊島耕一、本庄春雄、三好永作
　「原発事故緊急対策マニュアルーそのときあなたはどうするか！？」合同出版、1989年。
1)　九州大学公開講座11「核を考える」、九州大学出版会、1985年。pp.77-104分担。

一般寄稿(査読付き)：

7) 北朝鮮の核兵器開発はどこまで進んだか

　　岡本良治，「日本の科学者」,Vol.52, No.3, March 2017, pp.24-30.

   http://rokamoto.sakura.ne.jp/fukushima/2017Okamoto_North-Korea-Nuclear-Weapon.pdf

6) 炉心溶融物とコンクリートとの相互作用による水素爆発，CO爆発の可能性，

　　岡本良治，中西正之，三好永作，「科学」　March, 2014, Vol.84,No.3,pp.355-362.

　　http://jsa-fukuoka.sakura.ne.jp/shiryo/Kagaku_201403_Okamoto_etal.pdf

5）福島第一原発事故への地震動の影響

岡本良治，「日本の科学者」, Vol.48,No.3,March 2013, pp.6-11.

4) 福島第一原発事故の原因，推移，「収束方針」の分析

岡本良治，「日本の科学者」, Vol.47,No.3,March 2012, pp.8-12.
3)　チェルノブイリ原発事故の警告−日本の 原発だけが「安全」か−
　　中原　純、岡本良治、森　茂康,
  　「日本の科学者」、1986年（昭和61年）12月
2)　水爆とは何か−ブースター効果とテラー・ウラム配置−
　　岡本良治、中原　純、森　茂康,
 　 「日本の科学者」、1984年（昭和59年）１0月
1)　.核分裂兵器と爆縮技術
　　岡本良治、中原　純、森　茂康,
  　「日本の科学者」、1984年（昭和59年）3月、21ページ。