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基于费米能差提取原子核对称能

基于费米能差提取原子核对称能. 王宁 欧立 刘敏 广西师范大学. 1 、实验观测量少、精度不是很高(譬如中子皮) 2 、模型依赖性强、同位旋标量项的影响难以去除. 引 言 基于原子核质量提取对称能 基于原子核费米能差提取对称能 总结. Skyrme EDF. +…. Liquid drop. Deformation corr. Shell corr. Other corr. Duflo-Zuker. WS : PRC 81 (2010) 044322. WS* : PRC 82 (2010) 044304.

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基于费米能差提取原子核对称能

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  1. 基于费米能差提取原子核对称能 王宁 欧立 刘敏 广西师范大学

  2. 1、实验观测量少、精度不是很高(譬如中子皮)1、实验观测量少、精度不是很高(譬如中子皮) 2、模型依赖性强、同位旋标量项的影响难以去除 • 引 言 • 基于原子核质量提取对称能 • 基于原子核费米能差提取对称能 • 总结

  3. Skyrme EDF +… Liquid drop Deformation corr. Shell corr. Other corr. Duflo-Zuker WS :PRC 81 (2010) 044322 WS*:PRC 82 (2010) 044304 WS3:PRC 84 (2011) 014333

  4. 基于原子核质量提取对称能 M. Liu, N. Wang, Z. X. Li, F. S. Zhang, PRC82, 064306 (2010) P. Danielewicz and J. Lee, Nucl. Phys. A 818, 36 (2009).

  5. 核物质对称能与原子核对称能系数的关系 Centelles, et al., Phys. Rev. Lett. 102,122502(2009)

  6. M. Liu, N. Wang, Z. X.Li, F. S. Zhang, Phys. Rev. C 82, 064306 (2010)

  7. 核子分离能

  8. Nuclear Mass tables: http://www.imqmd.com/mass/ keV # 2149 1988 46 2149 测试模型预言能力 PRC 82 (2010) 044304; PRC84 (2011) 014333

  9. 幻数核费米能差 Fermi energy is the energy of the highest occupied state at zero temperature

  10. 54 套Skyrme力 16,22O, 22,42Si, 40,48,60Ca, 42Ti, 56,68,78Ni, 130Cd, 100,132,134Sn,134Te, 144Sm, 182,208Pb Unknown masses from WS3RBF rms deviation with respect to 2149 know nuclei is 184 keV

  11. Zhen Zhang and Lie-Wen Chen,arXiv:1302.5327

  12. N. Wang, L. Ou, M. Liu, PRC 87, 034327 (2013)

  13. 费米能差 arXiv:1303.4662v1 M. Liu, N. Wang, Z. X. Li, and F. S. Zhang, Phys. Rev. C 82, 064306 (2010). Steinerand Gandolfi, PRL 108, 081102 (2012) N. Wang, L. Ou, M. Liu, PRC 87, 034327 (2013)

  14. 总结与讨论 • 基于2000多个原子核质量以及核物质对称能与原子核对称能系数之间的关系,可以提取亚饱和密度区域的对称能的信息。 • 由质量提取对称能的优点是实验数据多,精度高,缺点是模型依赖性强(需要假设对称能的密度以及质量依赖形式) • 平均场近似下,幻数核的费米能差与核子分离能差近似相等,结合不同的Skyrme力可以提取亚饱和密度区域的对称能信息,再结合208Pb的中子皮厚度可以进一步约束饱和点的对称能 • 该方法能够比较干净地去除同位旋标量项的影响

  15. 谢 谢

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