摘要
用扩散模型考察了轻的幻核100Sn在裂变过程中蒸发的轻粒子多重性．发现壳仅对质子的发射有很强的影响,而对中子几乎没有影响,这与132Sn核的情况正好相反．因此把这种现象归因于系统中质比(N／Z)的影响．通过比较加104Sn和100Sn发射的粒子,N／Z的影响得到了进一步证实．计算发现高激发能弱化了N／Z效应．
The particle evaporation in the fission process of ^100Sn is studied using a diffusion model. It is shown that the shell influences strongly the proton emission whereas its effect on neutron emission is negligible, in contrast with the case of ^132Sn. It is due to the effect of the difference of neutron-to-proton ratio, N/Z, of the systems. This conclusion is further verified by comparing particle emission between ^100Sn and ^104Sn. Calculations indicate that high excitation energy weakens this N/Z effect.
出处
《高能物理与核物理》
EI
CSCD
北大核心
2006年第3期217-219,共3页
High Energy Physics and Nuclear Physics
基金
国家自然科学基金(10405007
90412014)东南大学优秀青年教师教学科研资助计划资助~~
关键词
壳效应
断前粒子多重性
中质比
扩散模型
shell effect, pre-scission particle multiplicity, neutron-to-proton ratio, diffusion model
