摘要
在统计模型的框架内研究了In核在三维空间的转动自由度对 1 0 .6和8.5MeV/u84Kr+ 2 7Al碰撞裂变前粒子发射的影响 .发现对后一个轰击能 ,断前粒子发射不敏感于转动自由度 ;对前一个能量 ,转动自由度的引入使提取的裂变延迟时间从 2 0× 1 0 - 2 1s减少到 7.5× 1 0 - 2 1s,表明了它对裂变前粒子蒸发的影响 ,计算结果也表明仅有转动自由度并不能完全解释In核的断前粒子增强发射现象 .发现了转动自由度在粒子发射中所起的作用对系统的激发能有一定的依赖关系 .
Effect of the rotational degree of freedom of In nucleus in three dimension space on prescission particle emission in 10.6MeV/u and 8.5MeV/u 84Kr+ 27Al collisions was studied in the framework of a statistical model. The calculation results show that for the latter incident energy,particle emission is insensitive to the rotational degree of freedom,while for the former one,the incorporation of this factor leads to the reduction of the extracted fission delay time from 20×10 -21s to 7.5×10 -21s,indicating the existence of this effect. The result also demonstrates that this effect is unable to completely account for the experimental data. In addition,the effect of rotational degree of freedom on particle evaporation prior to scission was found to depend on the excitation energy.
出处
《高能物理与核物理》
CSCD
北大核心
2002年第1期52-57,共6页
High Energy Physics and Nuclear Physics
基金
东南大学基金 ( 92 0 70 2 1 0 99)资助~~
