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北京航空航天大学核物理实验研究介绍

北京航空航天大学核物理实验研究介绍. 北京航空航天大学 核科学与技术系 2012 年 7 月. 报告内容. 北京航空航天大学核物理实验组简介. 在 RIBLL1 上的一些实验设想. Search for Direct Evidence of Tensor Interactions in Nuclei. Measure the differential cross section of 12 C(p,d) 11 C and 16 O(p,d) 15 O reactions at deuteron

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北京航空航天大学核物理实验研究介绍

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  1. 北京航空航天大学核物理实验研究介绍 北京航空航天大学 核科学与技术系 2012年7月

  2. 报告内容 • 北京航空航天大学核物理实验组简介 • 在RIBLL1上的一些实验设想

  3. Search for Direct Evidence of Tensor Interactions in Nuclei • Measure the differential cross section of 12C(p,d)11C and 16O(p,d)15O reactions at deuteron • angle θd=0 degree using the RIBLL2 separator

  4. Use the FRS for producing secondary beams of 6He and 6Li and measuring 0 degree • scattered deuterons by p(6He, d)5He and p(6Li, d)5Li reaction

  5. School of Physics and Nuclear Energy Engineering Study of repulsive nature of optical potential for high energy 12C+12C elastic scattering (Effect of the tensor and three-body interactions)

  6. Precision nuclear mass and half-life measurements in storage rings Important role of masses of exotic nuclei in nuclear structrue and astrophysics. Precision mass measurements in storage rings in collobration with IMP @ Lanzhou and GSI @ Darmstadt. B. Sun et al., NPA 812 (2008) 1

  7. TOF-P-DE method Towards more n-rich nuclei • Ultra-fast timing detector • High precision position detector • DE-detector: MUSIC Br = gm0v/q Beihang & IMP (2012)

  8. Magnetic rotation in the A=110mass Exotic motions of nucleus at high spin states (Magnetic rotation, Chiral rotation, Critical point symmetry) Collaboration: China Institute of Atomic Energy Beihang University Shenzhen University Shandong University Peking University Search for chiral rotational bands in the A=80 mass region Magnetic rotation in the A=110 mass region : 112In Chiral rotation in the A=110 mass region : 107Ag Collaboration: iThemba LABS, South Africa University of Stellenbosch Shandong University Peking University Beihang University…

  9. 在RIBLL1上的一些实验设想 • Reaction mechanism of weakly bound nuclei • The fusion cross sections may be strongly affected by channel coupling effects(inelastic, transfer and breakup), which are particularly important at sub-barrier energies. • For strongly bound nuclei, which have very high breakup thresholds, coupling to the breakup channel plays a small role in fusion reactions. For light weakly bound nuclei(stable weakly bound nuclei 6,7Li,9Be and unstable nuclei 6He, 11Be, 8B), which have very low breakup threshold, can affect the fusion process. The different fusion process can take place. (1)direct complete fusion(DCF), which is analogous to fusion of strongly bound nuclei; (2)For weakly bound nuclei, the projectile is dissociated into two or more fragments as it approaches the target, the fragments are fully (SCF, sequential complete fusion)or partially(ICF, incomplete fusion) absorbed. CF=DCF+SCF, TF=CF+ICF • For weakly bound nuclei, CF cross sections can be affected by two effects: (1)the long tail of density reduces the barrier height and changes the barrier curvature, lead to the enhancement of fusion; (2)maybe the strong dynamic effects arising from the coupling with the breakup channel, is harder to assess. L. F. Canto et al., Nucl. Phys. A 821 (2009) 51.

  10. Enhancement or hindrance? (1)CF cross sections is suppressed 10-30% , compared with those of CC(coupled channel) calculation which do not consider the breakup channel; (2)from TF cross section, didn’t show no appreciable effect; (3)CDCC calculation indicated that CF cross section is enhanced at energies much below the barrier and suppressed at energies well above the barrier. 6Li: S=1.47MeV 7Li: S=2.47MeV 9Be: S=1.57MeV 8Li: Sn=2.033MeV 7Be: Sp=1.59MeV 6He: S2n=0.975MeV 8B: Sp=0.137MeV 17F: Sp=0.601MeV A. Barioni et al., Phys. Rev. C 84 014603 (2011)

  11. A. Barioni et al., Phys.Rev. C 84 014603 (2011) G. L. Zhang et al., Eur. Phys. J. A 48, 65 (2012) P. R. S. Gomes et al., Phys. Rev. C 71 034608 (2005) M. Mazzocco et al., Phys. Rev. C 82 054604 (2010)

  12. J.J.Kolata et al., Phys. Rev. C 65, 054616 (2002) A. M. Sanchez-Benitez et al., J. Phys. G: Nucl. Part. Phys. 31, S1953 (2005) O. R. Kakuee et al., Nucl. Phys. A 728, 339 (2003) M. Mazzocco et al., Eur. Phys. A 28, 295 (2006)

  13. J. M. B. Shorto et al., Phys. Lett. B 678 (2009) 77. G. L. Zhang et al., Eur. Phys. J. A 48, 65 (2012) J. C. Zamora et al., Phys. Rev. C 84, 034611 (2011)

  14. J. M. B. Shorto et al., Phys. Lett. B 678 (2009) 77.

  15. A. Di Pietro et al., Phys. Rev. Lett. 105, 022701 (2010) A. Di Pietro et al., Phys. Rev. C. 85, 054607 (2012)

  16. K. Rusek et al., Acta Physica Polonica B, 43, 233 (2012)

  17. Structure of atomic nuclei with N~Z • Coulomb displacement energy • Isobaric analogue states • High spin structure • Long-lived isomers Sun, et al., Sci China-Phys Mech Astron, 54,210,(2010)

  18. Nuclear structure in 65As: 65Ge 65As + Production by projectile fragmentation + Separation by RIBLL1 + Energy level scheme of 65As + B(GT) strength + Possible isomeric state in 65As + Isobaric analogue states (65Ge, 65As) + …

  19. Thank You !

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