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軽い重イオン散乱における 三体斥力の効果

「少数系物理の現状と今後の展望」研究会 (Dec 23-25, 2008 at RCNP ). 軽い重イオン散乱における 三体斥力の効果. 古本 猛憲 ( 大阪市立大学・理学研究科). 共同研究者 櫻木 千典 ( 大阪市立大学・理学研究科) 山本 安夫 ( 都留文科大学 ). Contents. New complex G-matrix (CEG07) ・ modern NN interaction in free space “ ESC04 ” (Extended Soft-Core)

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軽い重イオン散乱における 三体斥力の効果

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  1. 「少数系物理の現状と今後の展望」研究会 (Dec 23-25, 2008 at RCNP) 軽い重イオン散乱における三体斥力の効果 古本 猛憲 (大阪市立大学・理学研究科) 共同研究者 櫻木 千典 (大阪市立大学・理学研究科) 山本 安夫 (都留文科大学)

  2. Contents • New complex G-matrix (CEG07) ・ modern NN interaction in free space “ESC04” (Extended Soft-Core) ・ includesthe Three-Body Force (TBF) effects ・ satisfy the nuclear-matter saturation property 2. Application to N-A elastic scattering ・ Single-Folding model for p + 12C 3. Application to A-A elastic scattering ・ Double-Folding model for 16O + 16O & other systems important role of three-body force (TBF)

  3. Complex G-matrix interaction（CEG07） T.Furumoto, Y. Sakuragi and Y. Yamamoto, Phys.Rev.C 78 (2008) 044610 “ESC04” : the latest version of Extended Soft-Core force designed for NN, YN and YY systems Th. Rijken, Y. Yamamoto, Phys.Rev.C 73 (2006) 044008 1. Three-body attraction (TBA) ・ Fujita-Miyazawa diagram ・ important at low density region 2. Three-body repulsion (TBR) ・ originated the triple-meson correlation ・ important at high-density region In the ESC04 model density-dependent effective two-body force

  4. derived from ESC04 NN force (Extended Soft-Core) Complex G-matrix interaction（CEG07） includesthe three-body force Decisive role to make the saturation curve realistic switch off three-body force (two-body only)

  5. T(s) r R Proton Target Single folding Potential(Central part) Complex G-matrix interaction (CEG07)

  6. T(LS)(s) r R Proton Target Single folding Potential(LS part) Complex G-matrix interaction (CEG07)

  7. Renormalization of the imaginary potential strength fix NW-value to be 0.65 to reproduce the measured total reaction cross sections

  8. p-12C elastic scattering

  9. Comparison of the folding potential at E = 122 MeV CEG07a(two body only) vs CEG07b(with TBF) TBF effect mainly seen in the real central part

  10. Comparison of the folding potential at E = 122 MeV CEG07a(two body only) vs CEG07b(with TBF) TBF effect This difference appears in analyzing power

  11. Nucleon-Nucleus (one nuclear matter) Nucleus-Nucleus (two nuclear matters)

  12. vNN(s) r2 r1 R Projectile(1) Target(2) Double folding Potential Frozen-density app. (FDA) Complex G-matrix interaction(CEG07)

  13. vNN(s) r2 r1 R Projectile(1) Target(2) Double folding Potential Frozen-density app. (FDA) Renormalization factor

  14. 16O + 16O elastic scattering ＠ E/A = 70 MeV important effect of three-body force T.Furumoto, Y. Sakuragi and Y. Yamamoto, (Phys.Rev.C rapidcommunications(2008) in press)

  15. vNN(s) r2 r1 R Projectile(1) Target(2) Double folding Potential Local density approximation(LDA) FDA

  16. 16O + 16O folding potentials with CEG07b (with TBF) ＠ E/A = 70 MeV 局所密度近似 (LDA) FDA

  17. 16O + 16O elastic scattering with CEG07b (with TBF) ＠ E/A = 70 MeV 局所密度近似 (LDA) FDA

  18. 16O + 12C, 12C + 12C elastic scattering 　　　　　　　　　　　　　　　　　　　＠ E/A = 93.9, 135 MeV important effect of three-body force

  19. Summary • We have proposed a new complex G-matrix (CEG07) • - derived from modern NN interaction model; • ESC04 (extended soft-core) • - include Three-Body Force (TBF) effect • to be consistent with saturation property • CEG07 with TBF-effects is successful for both • - proton-nucleus (N-A) • and nucleus-nucleus (A-A) elastic scattering • Decisive role of Three-Body Force (TBF) effect is found. • - particularly TBR (Three-Body Repulsion) effect is essential, • both for nuclear saturation & nucleus-nucleus scattering

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