1996 Fiscal Year Annual Research Report

少数多体系の厳密解とその応用

Research Project

Project/Area Number	07304066
Section	総合
Research Institution	Kyushu University
Principal Investigator	上村正康九州大学, 理学部, 助教授 (10037210)
Co-Investigator(Kenkyū-buntansha)	藤原義和京都大学, 理学部, 助手 (70199397) 梶野敏貴国立天文台, 助教授 (20169444) 尾立晋祥東京理科大学, 理工学部, 教授 (60089365) 岡部成玄北海道大学, 情報処理教育センター, 助教授 (70169134) 鈴木宜之新潟大学, 理学部, 教授 (70018670)
Keywords	少数粒子系 / 3体問題 / 4体問題 / ファデ-エフ方程式 / ガウス型基底関数 / 確率論的変分法 / 不安定核 / ハイパー核
Research Abstract	1)ガウス型基底関数を用いる組み替えチャネル変分法を用いてハイパー核の3体4体構造とハイペロン-核子相互作用のスピン-スピン依存力、スピン軌道力との関連を明らかにした。 2)偏極電子による偏極ヘリウム3核の分解反応で得られる縦横-応答関数において、3核子の終状相互作用によって生じる、中性子と陽子の干渉成分が大きな寄与を与える事を明らかにした。 3)現実的なスペクトル関数を用いて4Heの構造関数を求め、ブジョーケン変数が1の近傍の振る舞いを準弾性散乱過程の寄与も考慮に入れて調べた。一定の条件下では、高運動量成分に敏感な深部非弾性散乱成分を選択的に検証できることが分かった。 4)ガウス相関基底を用いた確率論的変分法の適用範囲の拡大ならびに基底選択アルゴリズムの更なる改良を行った。これにより、現実的核力で相互作用するA=3,4核子系の計算がGFMC法と比肩しうる精密さで容易にかつ少ない次元で求められることを示した。 5)4体反応2H(d,n)3He,2H(d,p)3Hを4体Faddeev-Yakubovsky方程式によってParisポテンシャルを用いて解析し、実験値をかなりよく再現した。 6)4He+12Cクラスター模型を用いて、160核の低エネルギー励起状態を精密に記述する事に成功した。宇宙における酵素元素の生成過程を明らかにするために、160核のbreakup反応を解析して、我々の波動関数をテストし、酵素元素の生成確率を精密に理論予測できることを示した。 7)原子核崩壊線上の原子核の構造、特に巨大共鳴に対する連続状態の効果及び中性子、陽子のスキン効果を研究し、かつ、安定核との違いも分析した。

Research Products
(38 results)

All Other

All Publications (38 results)

[Publications] E.Hiyama.: "Three-body model study of A=6-7 hypernuclei:Halo and skin structures" Phys.Rev.C53・5. 2075-2085 (1996)
[Publications] Y.Kino: "Muonic atom-nucleus collisions in the energy region of dtμ resonant states" Hyperfine Interactions. 101. 191-196 (1996)
[Publications] J.Wallenius: "Resonance energies of meta-stable dtμ" Hyperfine Interactions. 101. 319-324 (1996)
[Publications] Y.Kino: "Asymptotic form of three-body(dtμ)^+and(ddμ)^+wave functions" Hyperfine Interactions. 101. 325-328 (1996)
[Publications] T.Yamada: "Selection Rule for Fragmentativn of Doorway S-Hde States in Light Nuclei" Phys.Rev.C53・5. 752-764 (1996)
[Publications] T.Yamada: "Production of Double-Λ and Twin-Λ Hypernuclei in 〓-Atomic Capture into^<12>C" Frew-Body Systems Supplementum. 9. 281-284 (1996)
[Publications] H.Morita: "Nuclear Correlation Effects in the Deep Inelastic Structure Function of ^4He" Australian Journal of Phys.50. 53-63 (1997)
[Publications] K.Miyagawa: "Faddeev equations for the ΞNN and ΛΛ N system" Nucl.Phys.A. (掲載予定).
[Publications] K.Miyagawa: "Properties of the Hypertriton" Few-Body Systems Supplement. 9. 150-154 (1995)
[Publications] W.Glockle: "Nuclear Three-and Four-Body Systems" Few-Body Systems Supplement. 8. 9-20 (1995)
[Publications] S.Ishikawa: "Polarized ^3He and neutron form factors" Nucl.Inst.and Meth.A(掲載予定).
[Publications] M.Tanifuji: "Forward Polarization Observables in ^3He(d,p)^4He reaction" Nucl.Inst.and Meth.A(掲載予定).
[Publications] I.Kumagai-Fuse: "Pauli effects on pionic decay of light Λ-hypernuclei" Nucl.Phys.A585・2. 365-366 (1995)
[Publications] I.Kumagai-Fuse: "Evidence for a central repulsion potential from pionic decay of s-shell Λ-hypernuclei" Phys.Lett.B345. 386-392 (1995)
[Publications] 櫻木弘之: "Nuclear Breakup Reactions and Nuclear Cluster Structures" Proc.of the 14th RCNP OSAKA Int.Symp.981-2-2750-7. 61-74 (1996)
[Publications] D.O'Kelly: "Breakup of 30Mev/u-^<16>O in Nuclear and Coulomb Fields of 120Sn and 208Pb Nuclei" Phys.Lett.B(出版予定).
[Publications] A.Iwamoto: "Collisions of Deformed Nuclei:A Path to the Far Side of the Superheavy Island" Nucl.Phys.A596・2. 329-354 (1996)
[Publications] I.Hamamoto: "Single-Particle and Collective Properties of Drip-line Nuclei" Phys.Rev.C53・2. 765-774 (1996)
[Publications] I.Hamamoto: "Low Energy Strength in Low Multipole Response Function of Nuclei near Neutron Drip Line" Phys.Rev.C53・4. 1492-1496 (1996)
[Publications] H.sagawa: "Effect of Isospin Mixing on Super-allowed Fermi β Decay" Phys.Rev.C53・5. 2163-2170 (1996)
[Publications] I.Hamamoto: "Core Polarization Charges of Quadrupole Transitions in Neutron Drip Line Nuclei" Phys.Rev.C54・5. 2369-2373 (1996)
[Publications] T.Suzuki: "Isospin Mixing and Width of IAS" Phys.Rev.C54(印刷中). (1996)
[Publications] I.Hamamoto: "Electric Quadrupole Polarization Charges in Proton Drip Line Nuclei" Phys.Lett.B(掲載予定). (1997)
[Publications] E.Uzu: "Analyses of cross sections and analyzing powes in low-energy ^2H(d^^→,n)^3He reactions based on the invariant-amplitude and Faddeev-Yakubovsky methods" Few-Body Systems. (掲載予定). (1997)
[Publications] S.Oryu: "^3He(d,p)^4He Reaction Calculation with Three-Body Fadeev Equations" Nucl.Inst.and Meth.A(掲載予定). (1997)
[Publications] G.J.Mathews: "Inhomogeneous primordial mucleosynthesis and new atundance constraints on ΩB" Astrophys.Journal. 456. 98-105 (1996)
[Publications] T.Kajino: "Primordial rs. galactic origin of elements in metal-deficient stars" Nucl.Phys.(印刷中). (1997)
[Publications] S.Wanajo: "Explosive nucleosynthesis in O Ne Mg Novae" Nucl.Phys.(印刷中). (1997)
[Publications] Y.Yoshii: "Evolution of the light elements and the cosmic ray flux in the Galaxy" Astrophys.Journal. (印刷中). (1997)
[Publications] M.Orito: "Geometrical effects of baryon density inhomogeneities on primordial nucleosynthesis" Astrophys.Jounal. (印刷中). (1997)
[Publications] Y.Fujiwara: "Unified Description of NN and YN Interactions in a Quark Model with Effective Meson-Exchange Potentials" Phys.Rev.Lett.76・13. 2242-2245 (1996)
[Publications] Y.Fujiwara: "Effctive Meson-Exchange Potentials in the SU_6 Quark Model for NN and YN Interactions" Phys.Rev.C54・5. 2180-2200 (1996)
[Publications] K.Varga: "Stochastic Variational Method with a Correlated Gaussian Basis" Phys.Rev.A53. 1907-1910 (1996)
[Publications] T.Kido: "Coulomb Breakup Mechanism of Neutron-halo Nuclei in a Time-dependent" Phys.Rev.C53・5. 2296-2303 (1996)
[Publications] K.Arai: "Structure of the Mirror Nuclei 9Be and 9B in a Microscopic Cluster Model" Phys.Rev.C54・1. 132-146 (1996)
[Publications] T.Fujita: "Scattering Observables of NN Interaction in the SU6 Quark Model" Prog.Theor.Phys.96・2. 463-468 (1996)
[Publications] T.Fujita: "Scattering Observables of Σ+p System in the SU6 Quark Model" Prog.Theor.Phys.96・3. 653-658 (1996)
[Publications] Y.Suzuki: "Occupation Probability of Harmonic-oscillator Quanta for Microscopic Cluster-model Wave Functions" Phys.Rev.C54・4. 2073-2076 (1996)

1996 Fiscal Year Annual Research Report

少数多体系の厳密解とその応用

Principal Investigator

上村 正康 九州大学, 理学部, 助教授 (10037210)

Research Products

[Publications] E.Hiyama.: "Three-body model study of A=6-7 hypernuclei:Halo and skin structures" Phys.Rev.C53・5. 2075-2085 (1996)

[Publications] Y.Kino: "Muonic atom-nucleus collisions in the energy region of dtμ resonant states" Hyperfine Interactions. 101. 191-196 (1996)

[Publications] J.Wallenius: "Resonance energies of meta-stable dtμ" Hyperfine Interactions. 101. 319-324 (1996)

[Publications] Y.Kino: "Asymptotic form of three-body(dtμ)^+and(ddμ)^+wave functions" Hyperfine Interactions. 101. 325-328 (1996)

[Publications] T.Yamada: "Selection Rule for Fragmentativn of Doorway S-Hde States in Light Nuclei" Phys.Rev.C53・5. 752-764 (1996)

[Publications] T.Yamada: "Production of Double-Λ and Twin-Λ Hypernuclei in 〓-Atomic Capture into^<12>C" Frew-Body Systems Supplementum. 9. 281-284 (1996)

[Publications] H.Morita: "Nuclear Correlation Effects in the Deep Inelastic Structure Function of ^4He" Australian Journal of Phys.50. 53-63 (1997)

[Publications] K.Miyagawa: "Faddeev equations for the ΞNN and ΛΛ N system" Nucl.Phys.A. (掲載予定).

[Publications] K.Miyagawa: "Properties of the Hypertriton" Few-Body Systems Supplement. 9. 150-154 (1995)

[Publications] W.Glockle: "Nuclear Three-and Four-Body Systems" Few-Body Systems Supplement. 8. 9-20 (1995)

[Publications] S.Ishikawa: "Polarized ^3He and neutron form factors" Nucl.Inst.and Meth.A(掲載予定).

[Publications] M.Tanifuji: "Forward Polarization Observables in ^3He(d,p)^4He reaction" Nucl.Inst.and Meth.A(掲載予定).

[Publications] I.Kumagai-Fuse: "Pauli effects on pionic decay of light Λ-hypernuclei" Nucl.Phys.A585・2. 365-366 (1995)

[Publications] I.Kumagai-Fuse: "Evidence for a central repulsion potential from pionic decay of s-shell Λ-hypernuclei" Phys.Lett.B345. 386-392 (1995)

[Publications] 櫻木 弘之: "Nuclear Breakup Reactions and Nuclear Cluster Structures" Proc.of the 14th RCNP OSAKA Int.Symp.981-2-2750-7. 61-74 (1996)

[Publications] D.O'Kelly: "Breakup of 30Mev/u-^<16>O in Nuclear and Coulomb Fields of 120Sn and 208Pb Nuclei" Phys.Lett.B(出版予定).

[Publications] A.Iwamoto: "Collisions of Deformed Nuclei:A Path to the Far Side of the Superheavy Island" Nucl.Phys.A596・2. 329-354 (1996)

[Publications] I.Hamamoto: "Single-Particle and Collective Properties of Drip-line Nuclei" Phys.Rev.C53・2. 765-774 (1996)

[Publications] I.Hamamoto: "Low Energy Strength in Low Multipole Response Function of Nuclei near Neutron Drip Line" Phys.Rev.C53・4. 1492-1496 (1996)

[Publications] H.sagawa: "Effect of Isospin Mixing on Super-allowed Fermi β Decay" Phys.Rev.C53・5. 2163-2170 (1996)

[Publications] I.Hamamoto: "Core Polarization Charges of Quadrupole Transitions in Neutron Drip Line Nuclei" Phys.Rev.C54・5. 2369-2373 (1996)

[Publications] T.Suzuki: "Isospin Mixing and Width of IAS" Phys.Rev.C54(印刷中). (1996)

[Publications] I.Hamamoto: "Electric Quadrupole Polarization Charges in Proton Drip Line Nuclei" Phys.Lett.B(掲載予定). (1997)

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

[Publications] S.Oryu: "^3He(d,p)^4He Reaction Calculation with Three-Body Fadeev Equations" Nucl.Inst.and Meth.A(掲載予定). (1997)

[Publications] G.J.Mathews: "Inhomogeneous primordial mucleosynthesis and new atundance constraints on ΩB" Astrophys.Journal. 456. 98-105 (1996)

[Publications] T.Kajino: "Primordial rs. galactic origin of elements in metal-deficient stars" Nucl.Phys.(印刷中). (1997)

[Publications] S.Wanajo: "Explosive nucleosynthesis in O Ne Mg Novae" Nucl.Phys.(印刷中). (1997)

[Publications] Y.Yoshii: "Evolution of the light elements and the cosmic ray flux in the Galaxy" Astrophys.Journal. (印刷中). (1997)

[Publications] M.Orito: "Geometrical effects of baryon density inhomogeneities on primordial nucleosynthesis" Astrophys.Jounal. (印刷中). (1997)

[Publications] Y.Fujiwara: "Unified Description of NN and YN Interactions in a Quark Model with Effective Meson-Exchange Potentials" Phys.Rev.Lett.76・13. 2242-2245 (1996)

[Publications] Y.Fujiwara: "Effctive Meson-Exchange Potentials in the SU_6 Quark Model for NN and YN Interactions" Phys.Rev.C54・5. 2180-2200 (1996)

[Publications] K.Varga: "Stochastic Variational Method with a Correlated Gaussian Basis" Phys.Rev.A53. 1907-1910 (1996)

[Publications] T.Kido: "Coulomb Breakup Mechanism of Neutron-halo Nuclei in a Time-dependent" Phys.Rev.C53・5. 2296-2303 (1996)

[Publications] K.Arai: "Structure of the Mirror Nuclei 9Be and 9B in a Microscopic Cluster Model" Phys.Rev.C54・1. 132-146 (1996)

[Publications] T.Fujita: "Scattering Observables of NN Interaction in the SU6 Quark Model" Prog.Theor.Phys.96・2. 463-468 (1996)

[Publications] T.Fujita: "Scattering Observables of Σ+p System in the SU6 Quark Model" Prog.Theor.Phys.96・3. 653-658 (1996)

[Publications] Y.Suzuki: "Occupation Probability of Harmonic-oscillator Quanta for Microscopic Cluster-model Wave Functions" Phys.Rev.C54・4. 2073-2076 (1996)

上村正康九州大学, 理学部, 助教授 (10037210)

[Publications] 櫻木弘之: "Nuclear Breakup Reactions and Nuclear Cluster Structures" Proc.of the 14th RCNP OSAKA Int.Symp.981-2-2750-7. 61-74 (1996)