Isospin effect in statistical sequential decay
Isospin effect in statistical sequential decay
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统计连续衰变中的同位旋效应
DOI：
10.1103/physrevc.76.024607
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发表时间：
2007-02
影响因子：
3.1
通讯作者：
中科院分区：
文献类型：
--
作者：
在GEMINI码的统计二元衰变框架下，研究了平衡源的统计发射碎片的同位旋效应，观察了等标度行为，研究了等标度参数α和β对发射碎片大小、源大小、源同位旋不对称性和激发能的依赖关系。结果表明，α和β与光片段大小和光源大小无关。在不同的同位旋不对称源中，α和β与温度T的逆关系良好，α =4C(sym)[(Z(s)/A(s))(1)(2))-(Z(s)/A(s))(2)(2)]/T和β =4C(sym)[(N-s/A(s))(1)(2)-(N-s/A(s))(2)(2)]/T的关系得到满足。从模拟结果中提取的对称能系数C-sym近似于23 MeV，其中包括体积项和表面项的贡献，其中表面效应似乎对对称能起重要作用。
Isospin effect of the statistical emission fragments from the equilibrated source is investigated in the frame of statistical binary decay implemented into the GEMINI code, isoscaling behavior is observed and the dependences of isoscaling parameters alpha and beta on emission fragment size, source size, source isospin asymmetry and excitation energies are studied. Results show that alpha and beta neither depends on light fragment size nor on source size. A good linear dependence of alpha and beta on the inverse of temperature T is manifested and the relationship of alpha=4C(sym)[(Z(s)/A(s))(1)(2)-(Z(s)/A(s))(2)(2)]/T and beta=4C(sym)[(N-s/A(s))(1)(2)-(N-s/A(s))(2)(2)]/T from different isospin asymmetry sources is satisfied. The symmetry energy coefficient C-sym extracted from simulation results is similar to 23 MeV which includes both the volume and surface term contributions, of which the surface effect seems to play a significant role in the symmetry energy.