Symmetry Energy Effects in a Statistical Multifragmentation Model
Symmetry Energy Effects in a Statistical Multifragmentation Model
复制标题
统计多碎片模型中的对称能量效应
DOI:
10.1088/0256-307x/28/11/112102
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发表时间:
2011-10
期刊:
影响因子:
--
通讯作者:
GUO WJ
中科院分区:
文献类型:
--
作者:
Gao Y;ZHANG HF;ZHANG L;CHEN XM;LI JQ;GUO WJ
The symmetry energy effects on the nuclear disintegration mechanisms of the neutron-rich system (A0 = 200, Z0 = 78) are studied in the framework of the statistical multifragmentation model (SMM) within its micro-canonical ensemble. A modified symmetry energy term with consideration of the volume and surface asymmetry is adopted instead of the original invariable value in the standard SMM model. The results indicate that as the volume and surface asymmetries are considered, the neutron-rich system translates to a fission-like process from evaporation earlier than the original standard SMM model at lower excitation energies, and its mass distribution has larger probabilities in the medium-heavy nuclei range so that the system breaks up more averagely. When the excitation energy becomes higher, the volume and surface asymmetry lead to a smaller average multiplicity.
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DOI:
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期刊:
arXiv: Nuclear Theory
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10.1103/physrevc.51.1384
发表时间:
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期刊:
Physical review. C, Nuclear physics
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