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M. Matsuo, PRC73(’06)044309

Matter Calc. M. Matsuo, PRC73(’06)044309. Two-particle density. Experimental proof of di-neutron. Dipole Excitations. Response to the dipole field:. Smearing:. T. Nakamura et al., PRL96,252502(2006). Comparison with expt. data ( 11 Li). T. Aumann et al., PRC59, 1259(1999).

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M. Matsuo, PRC73(’06)044309

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  1. Matter Calc. M. Matsuo, PRC73(’06)044309

  2. Two-particle density

  3. Experimental proof of di-neutron Dipole Excitations Response to the dipole field: Smearing:

  4. T. Nakamura et al., PRL96,252502(2006) Comparison with expt. data (11Li) T. Aumann et al., PRC59, 1259(1999) Epeak=0.66 MeV B(E1) = 1.31 e2fm2 (E < 3.3 MeV) Epeak ~ 0.6 MeV B(E1) = (1.42 +/- 0.18) e2fm2 (E < 3.3 MeV)

  5. R r Constraining the size of 11Li by various experiments H. Esbensen et al., Phys. Rev. C (2007).

  6. Geometry of Borromean nuclei 11Li q12 “experimental” mean opening angle B(E1) matter radius 6He (11Li) (6He) K.Hagino and H. S.,PRC76(’07)047302 C.A. Bertulani and M.S. Hussein, PRC76(’07)051602

  7. １１Li three-body break-up cross sections K. Hagino, H.S.,T.Nakamura and S.Shimoura, PRC80,031301(R)(2009)

  8. Dalitz Plot of Triple coincidence experiments Exp. T. Nakamura et al., to be published

  9. Nakamura-san’s slides

  10. Double differential strength function for 11Li full calculation (with FSI) (with FSI) No Vn-core virtual s-state! (No Vn-core （without FSI)

  11. full calculation No Vn-core (with FSI) （without FSI)

  12. Di-proton correlation in aproton-rich Borromeannucleus 17Ne Tomohiro OishiA, Kouichi HaginoA, Hiroyuki SagawaB ATohoku Univ., BUniv. of Aizu PRC82, 024315(2010) http://arxiv.org/abs/1007.0835

  13. 2.2 Pairing interaction Explicit Coulomb interaction Density-dependentcontact interaction We need cutoff:EC to determine v0 (pairing in vacuum). Other parameters are fixed to obtain g.s.energy of 17Ne:-0.944 MeV.

  14. 2.3 Single-particle basis Woods-Saxon + Coulomb potential for p-Core

  15. 3.1 Results (1)

  16. 3.2 Results (2) “Di-proton correlation”

  17. Summary I • Application of three-body model to Borromean nuclei 11Li • E1 response and geometry of Borromean nuclei • strong pair correlations in di-neutrons q12 • Di-neutron wave function for each R • Concentration of a Cooper pair on the nuclear surface • Relation to BCS-BEC crossover phenomenon • n-n coincidence cross sections from 11Li* and 6He* • importance of n-core interaction • clear evidence of virtual s-state in n-9Li system • correlation angle is determined experimentally.

  18. Summary II • Strong di-proton correlations is found in 17Ne • Two body Coulomb interaction decreases 13% of di-proton correlations. Recent publications: • Di-neutron correlations in 11Li and 6He • K.Hagino and H. S., PRC72(’05) 044321. • K.H.agino and H. S., PRC75(’07)021301(R). • K.Hagino, H. S., J. Carbonell, and P. Schuck, PRL99(’07)022506. • H. Esbensen, K.Hagino, P. Mueller, and H. S., PRC76(’07)024302. • K.Hagino and H. S., PRC76(’07) 047302. • energy and angular n-n coincidence cross sections • K.Hagino, H.S. ,T. Nakamura and S. Shimoura, PRC80,031301 (R)(2009). • Di-proton correlations in 17Ne • T.Oishi, K. Hagino and HS, PRC82,024315 (2010).

  19. Spatial structure of neutron Cooper pair in infinite matter BCS Crossover region M. Matsuo, PRC73(’06)044309

  20. BCS-BEC crossover behavior in infinite nuclear matter Neutron-rich nuclei • Weakly bound levels • dilute density around surface (halo/skin) pairing gap in infinite nuclear matter M. Matsuo, PRC73(’06)044309

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