Temperature and symmetry energy of neutron-rich fragments in the 1A GeV124,136Xe+Pb reactions

被引：0

作者：

MA Chunwang ^{[1
]}

QIAO Chunyuan ^{[1
]}

WANG Shanshan ^{[1
]}

LU Fangmei ^{[1
]}

CHEN Li ^{[1
]}

GUO Meiting ^{[1
]}

机构：

[1] Institute of Particle and Nuclear Physics,Henan Normal University

来源：

NuclearScienceandTechniques | 2013年 / 24卷 / 05期

基金：

中国国家自然科学基金;

关键词：

Temperature; Symmetry energy; Isobaric yield ratio; Neutron-rich nucleus;

D O I：

10.13538/j.1001-8042/nst.2013.05.010

中图分类号：

O571.5 [中子物理];

学科分类号：

0827 ; 082701 ;

摘要：

In this work we study the symmetry-energy coefficient of neutron-rich nuclei,and the temperature dependence of nuclear symmetry energy at low temperatures.An isobaric method is used to extract the symmetry-energy coefficients of neutron-rich nucleus(asym) at zero temperature(T) and asym/T at nonzero temperature in the measured 1A GeV124,136Xe+Pb reactions.T of fragment is obtained from the ratio of its asym to asym/T.The results show that,for fragment with the same neutron-excess(I=N Z),the heavier the fragment is,the higher T it has,and T tends to saturate around 1 MeV for the large mass fragments.It is also shown that the more neutron-rich the isobar is,the higher temperature it has.The T2dependence of symmetry energy of finite nucleus at low temperatures is verified by the extracted results.

引用

页码：60 / 63

页数：4