热核的热稳定曲线  

Thermal Stability Line for Hot Nuclei

作　　者：欧立[1] 刘敏[1] 李祝霞[1] 柳继锋[2] 

机构地区：[1]中国原子能科学研究院,北京102413 [2]广西师范大学物理与信息工程学院,桂林541004

出　　处：《高能物理与核物理》2004年第11期1160-1164,共5页High Energy Physics and Nuclear Physics

基　　金：国家自然科学基金 (10 175 0 93 ;10 2 3 5 0 3 0 ;10 14 72 0 2 ) ;广西自然科学基金(9714 0 0 5 ) ;国家重点基础研究发展规划项目 (G2 0 0 0 0 7740 0 )资助~~

摘　　要：从核极限温度的角度研究了热核的热稳定性 .采用Skyrme相互作用力计算热核同位素的极限温度 ,得到的极限温度的同位素分布呈现出倒置抛物线的趋势 ,与中能重离子反应多重碎裂中同位素产额分布的实验结果具有一致的行为表现 .系统地计算了从轻到重的一系列元素极限温度的同位素分布 ,并从中抽取出热核的热稳定曲线 .与 β稳定线相比 ,热核的热稳定线更加偏丰中子 .The thermal stability for hot nucleus is investigated based on limiting temperatures. We calculate the isotope distributions of limiting temperatures for finite nuclear systems by using Skyrme interaction. The isotope distribution of limiting temperatures appears to be an upside-down parabolic shape, which looks very similar with the isotope distribution of the products of multifragmentation in intermediate energy heavy ion collisions. We systematically calculated the isotope distributions of limiting temperatures for a series of nuclei from light to heavy nuclei, and obtain a thermal stability line for hot nuclei. The thermal stability line is more neutron-rich compared with the β-stability line.

关 键 词：热核 多重碎裂 极限温度 产额 重离子 曲线 中子 同位素 定线 抽取 

分 类 号：O571[理学—粒子物理与原子核物理]