1996 Fiscal Year Annual Research Report

低および中高エネルギー領域の核衝突の微視的研究

Research Project

Project/Area Number	07304030
Section	総合
Research Institution	Kyoto University
Principal Investigator	堀内昶京都大学, 大学院・理学研究科, 教授 (60027349)
Co-Investigator(Kenkyū-buntansha)	香村俊武筑波大学, 物理学系, 教授 (20015556) 大塚孝治東京大学, 大学院・理学系研究科, 教授 (20201379) 市村宗武東京大学, 大学院・総合文化研究科, 教授 (10012436) 大坪久夫大阪大学, 大学院・理学研究科, 教授 (30029491) 滝川昇東北大学, 大学院・理学研究科, 助教授 (00125600)
Keywords	微視的シミュレーション / 直接反応 / 不安定核 / 元素合成 / 分子的構造 / 相対論的平均場理論 / Hartree Fock 理論 / 分子動力学
Research Abstract	本研究計画の主要課題毎に研究実績の概要を述べると以下のようである。(i)「核反応の微視的シミュレーション理論による研究」の課題については、反対称化分子動力学(AMD)理論により衝突核の構造が殻模型構造かクラスター模型構造かが反映される反応過程の研究に大きな進展があり、これは量子力学的理論にして始めて可能となったものである。また、量子分子動力学(QMD)を広い入射エネルギー範囲に亘って適用し多くの興味深い結果が得られた。またクォークグルオンプラズマ生成の問題に対する種々のアプローチの間の研究交流も行われた。(ii)「直接反応理論による研究」の課題については、keV領域での核子移行反応や輻射中性子捕獲反応の研究が天体に於ける元素合成の問題にも関係して行われ、また現実的核力を用いた少数多体系での核反応の研究が核融合の素過程にも関連して進展し、さらに重陽子散乱の反対称化や分解効果を取り入れた研究の進展、更に又重い原子核の融合反応については表面振動や変形の効果を取り入れて精密な分光学的研究として大きく進展を見るなど、多彩な反応過程の研究が中間子発生エネルギー領域までに亘って進められた。(iii)「不安定核の構造と反応」の課題については、AMD理論がLi、Be、B、Cの全アイソトープの広大な領域に亘って種々の物理量の観測値の再現や予言に活躍し、中性子と陽子の密度分布の変形の符号が反対であるという衝撃的な理論の予言が実験データにより支持されるとする研究も提出された。また中性子過剰核を用いた反応の三次元時間依存Hartree-Fock法による研究が計算コードを大幅に整備して行われ、安定核とは異なって大規模に核子移行の起こる反応過程の解明が進んでいる。また、不安定核の構造の研究に非相対論的なSkyrme Hartree Fockによる研究と相対論的平均場による研究とが比較されつつ進められ多くの興味深い知見をもたらしている。(iv)「分子的構造と核反応機構」の課題については、我国のクラスター模型研究の卓越した研究実績に基づいた様々な進展が新しい理論の開発を伴いつつ引き続き行われた。例えば、軽い中性子過剰核での新たなクラスター構造の発現のAMDによる研究、中性子過剰核の反応研究における分子軌道法の適用、中性子過剰核の多体クラスター模型による研究、pf-殻領域のクラスター構造研究、などである。

Research Products

(31 results)

All Other

All Publications (31 results)

[Publications] A.Ono: "Improvement of the Nucleon Emission Process and the Statistical Property in Molecular Dynamics" Physical Review C. 53. 845-848 (1996)
[Publications] A.Ono: "Statistical Property of Antisymmetrized Molecular Dynamics for Non-Nucleon-Emission and Nucleon-Emission Processes" Physical Review C. 53. 2341-2351 (1996)
[Publications] A.Ono: "Antisymmetrized Molecular Dynamics of Wave Packets with Stochastic Incorporation of the Vlasov Equation" Physical Review C. 53. 2958-2972 (1996)
[Publications] H.Takemoto: "^4He Fragments from ^<14>N+^<12>C Collision at 35 MeV/nucleon and Clustering in Colliding Nuclei" Physical Review C. 54. 266-275 (1996)
[Publications] Y.kanada-En'yo: "Magnetic Moments of C Isotopes Studied with AMD Method" Physical Review C. 54. R468-R471 (1996)
[Publications] E.I.Tanaka: "Determination of In-Medium Nucleon-Nucleon Cross Section from the Data of Proton-Induced Reaction Cross Section" Physical Review C. 54. 3170-3174 (1996)
[Publications] J.Mano: "Medium Effects on Spin Observalbes in ^<40>Ca(p,2p)^<39>K reaction" Progress of Theoretical Physics. 96. 1049-1054 (1996)
[Publications] Y.Yamashita: "Two mode,finite range distorted Wave Born approximation analysis of the ^9Be(p,α)^6Li reaction at 45 and 50 MeV" Physical Review C. 54. 2077-2080 (1996)
[Publications] H.Nakada: "Realistic shell-model calculations of the 2νββ nuclear matrix elements and the role of the shell structure in intermediate states" Nuclear Physics A. 607. 235-249 (1996)
[Publications] H.Homma: "Systematic study of nuclear β decay" Physical Review C. 54. 2972-2985 (1996)
[Publications] K.Muto: "Extended quasiparticle RPA and double-bata-decay nuclear matrix elements" Physics Letters B. 391. 243-248 (1997)
[Publications] H.Kouno: "Properties of Nuclear Matter in Cutoff Field Theory and the Low-Energy Effective Lagrangian in the Hartree Approximation" Progress of Theoretical Physics. 97. 91-101 (1997)
[Publications] E.Uzu: "Analyses of cross sections and analyzing powers in low-energy ^2H(d,n)^3He reactions based on the invariant-amptitude and Faddeev-Yakubovsky methods" Few-Body Systems. (掲載決定). (1997)
[Publications] S.Oryu: "^3He(d,p)^4He Reaction Calculation with Three-Body faddeev Equations" Nuclear Instruments and Methods. (掲載決定). (1997)
[Publications] M.Homma: "Nuclear Shell Model by the Quantum Monte Carlo Diagonalization Method" Physical Review Letters. 77. 3315-3318 (1996)
[Publications] T.Kaneko: "Analysis of deuteron+nucleus scattering data with a simplified resonatinggroup method" Nuclear Physics A. 599. 545-559 (1996)
[Publications] T.Kaneko: "Scattering of deuterons by nuclei with breakup effects" Nuclear Physics A. 612. 204- (1997)
[Publications] T.Nagata: "NN Vacuum Polarizations and Meson Exchange Interactions in Finite Nuclei" Nuclear Physics A. 601. 333-348 (1996)
[Publications] N.Takigawa: "Reply to "Comment on 'Shape and superdeformed structure in Hg isotopes in relativistic mean field model' and 'structure of neutron-deficient Pt,Hg and Pb isotopes'"" Physical Review C. 53. 1038-1040 (1996)
[Publications] M.Ueda: "Forward nuclear glory scattering of a halo nucleus" Nuclear Physics A. 598. 273-283 (1996)
[Publications] K.Hagino: "Thermal fission rate around superfluid-normal phase transition" Physical Review C. 53. 1840-1844 (1996)
[Publications] K.Hagino: "Validity of the linear coupling approximation in heavy-ion fusion reactions at sub barrier energies" Physical Review C. (掲載決定). (1997)
[Publications] N.Takigawa: "Heavy-Ion Fusion Reactions as Macroscopic Quantum Tunneling" Progress of Theoretical Physics Supplement. 124. 1-22 (1996)
[Publications] S.Yoshida: "Shape dependence of pairing gap energies and the structure of Hg and Pb isotopes" Physical Review C. (掲載決定). (1997)
[Publications] A.Bonasera: "Spontaneous fission : a kinetic approach" Physical Review Letters. 78. 187-190 (1997)
[Publications] W.von Oertzen: "A Study of coupled-reaction-channel effects in the ^<36>S + ^<37>Cl system-Hybridization between single particle orbits-" Zeitschrift fur Physik A. 353. 373-385 (1996)
[Publications] B.Imanishi: "Charge symmetric systems ^<12>C + ^<13>N and ^<12>C + ^<13>C with the orthogonarized coupled-reaction-channel method" Physical Review C. (掲載決定). (1997)
[Publications] G.F.Filippov: "^6He as a Three-Cluster System-Investigation of Ground State and Continuum O^+ states-" Progress of Theoretical Physics. 96. 575-595 (1996)
[Publications] K.Kato: "Resonance States in the ^<12>C-^<12>C Morse Potential" Physical Review C. (掲載決定). (1997)
[Publications] A.Iwamoto: "Nuclear deformation and sub-barrier fusion cross sections" Nuclear Physics A. 605. 334-358 (1996)
[Publications] A.Iwamoto: "Collision of deformed nuclei : a path to the far side of the superheavy island" Nuclear Physics A. 596. 329-354 (1996)

1996 Fiscal Year Annual Research Report

低および中高エネルギー領域の核衝突の微視的研究

Principal Investigator

堀内 昶 京都大学, 大学院・理学研究科, 教授 (60027349)

Research Products

[Publications] A.Ono: "Improvement of the Nucleon Emission Process and the Statistical Property in Molecular Dynamics" Physical Review C. 53. 845-848 (1996)

[Publications] A.Ono: "Statistical Property of Antisymmetrized Molecular Dynamics for Non-Nucleon-Emission and Nucleon-Emission Processes" Physical Review C. 53. 2341-2351 (1996)

[Publications] A.Ono: "Antisymmetrized Molecular Dynamics of Wave Packets with Stochastic Incorporation of the Vlasov Equation" Physical Review C. 53. 2958-2972 (1996)

[Publications] H.Takemoto: "^4He Fragments from ^<14>N+^<12>C Collision at 35 MeV/nucleon and Clustering in Colliding Nuclei" Physical Review C. 54. 266-275 (1996)

[Publications] Y.kanada-En'yo: "Magnetic Moments of C Isotopes Studied with AMD Method" Physical Review C. 54. R468-R471 (1996)

[Publications] E.I.Tanaka: "Determination of In-Medium Nucleon-Nucleon Cross Section from the Data of Proton-Induced Reaction Cross Section" Physical Review C. 54. 3170-3174 (1996)

[Publications] J.Mano: "Medium Effects on Spin Observalbes in ^<40>Ca(p,2p)^<39>K reaction" Progress of Theoretical Physics. 96. 1049-1054 (1996)

[Publications] Y.Yamashita: "Two mode,finite range distorted Wave Born approximation analysis of the ^9Be(p,α)^6Li reaction at 45 and 50 MeV" Physical Review C. 54. 2077-2080 (1996)

[Publications] H.Nakada: "Realistic shell-model calculations of the 2νββ nuclear matrix elements and the role of the shell structure in intermediate states" Nuclear Physics A. 607. 235-249 (1996)

[Publications] H.Homma: "Systematic study of nuclear β decay" Physical Review C. 54. 2972-2985 (1996)

[Publications] K.Muto: "Extended quasiparticle RPA and double-bata-decay nuclear matrix elements" Physics Letters B. 391. 243-248 (1997)

[Publications] H.Kouno: "Properties of Nuclear Matter in Cutoff Field Theory and the Low-Energy Effective Lagrangian in the Hartree Approximation" Progress of Theoretical Physics. 97. 91-101 (1997)

[Publications] E.Uzu: "Analyses of cross sections and analyzing powers in low-energy ^2H(d,n)^3He reactions based on the invariant-amptitude and Faddeev-Yakubovsky methods" Few-Body Systems. (掲載決定). (1997)

[Publications] S.Oryu: "^3He(d,p)^4He Reaction Calculation with Three-Body faddeev Equations" Nuclear Instruments and Methods. (掲載決定). (1997)

[Publications] M.Homma: "Nuclear Shell Model by the Quantum Monte Carlo Diagonalization Method" Physical Review Letters. 77. 3315-3318 (1996)

[Publications] T.Kaneko: "Analysis of deuteron+nucleus scattering data with a simplified resonatinggroup method" Nuclear Physics A. 599. 545-559 (1996)

[Publications] T.Kaneko: "Scattering of deuterons by nuclei with breakup effects" Nuclear Physics A. 612. 204- (1997)

[Publications] T.Nagata: "NN Vacuum Polarizations and Meson Exchange Interactions in Finite Nuclei" Nuclear Physics A. 601. 333-348 (1996)

[Publications] N.Takigawa: "Reply to "Comment on 'Shape and superdeformed structure in Hg isotopes in relativistic mean field model' and 'structure of neutron-deficient Pt,Hg and Pb isotopes'"" Physical Review C. 53. 1038-1040 (1996)

[Publications] M.Ueda: "Forward nuclear glory scattering of a halo nucleus" Nuclear Physics A. 598. 273-283 (1996)

[Publications] K.Hagino: "Thermal fission rate around superfluid-normal phase transition" Physical Review C. 53. 1840-1844 (1996)

[Publications] K.Hagino: "Validity of the linear coupling approximation in heavy-ion fusion reactions at sub barrier energies" Physical Review C. (掲載決定). (1997)

[Publications] N.Takigawa: "Heavy-Ion Fusion Reactions as Macroscopic Quantum Tunneling" Progress of Theoretical Physics Supplement. 124. 1-22 (1996)

[Publications] S.Yoshida: "Shape dependence of pairing gap energies and the structure of Hg and Pb isotopes" Physical Review C. (掲載決定). (1997)

[Publications] A.Bonasera: "Spontaneous fission : a kinetic approach" Physical Review Letters. 78. 187-190 (1997)

[Publications] W.von Oertzen: "A Study of coupled-reaction-channel effects in the ^<36>S + ^<37>Cl system-Hybridization between single particle orbits-" Zeitschrift fur Physik A. 353. 373-385 (1996)

[Publications] B.Imanishi: "Charge symmetric systems ^<12>C + ^<13>N and ^<12>C + ^<13>C with the orthogonarized coupled-reaction-channel method" Physical Review C. (掲載決定). (1997)

[Publications] G.F.Filippov: "^6He as a Three-Cluster System-Investigation of Ground State and Continuum O^+ states-" Progress of Theoretical Physics. 96. 575-595 (1996)

[Publications] K.Kato: "Resonance States in the ^<12>C-^<12>C Morse Potential" Physical Review C. (掲載決定). (1997)

[Publications] A.Iwamoto: "Nuclear deformation and sub-barrier fusion cross sections" Nuclear Physics A. 605. 334-358 (1996)

[Publications] A.Iwamoto: "Collision of deformed nuclei : a path to the far side of the superheavy island" Nuclear Physics A. 596. 329-354 (1996)

堀内昶京都大学, 大学院・理学研究科, 教授 (60027349)