摘要
从裂片关联测量给出的线性动量转移(LMT)分布,将非完全熔合裂变与跟随裂变事件分开,分别给出其裂变角分布.用卡西尼亚卵形体计算惯性矩,采用常规方法拟合裂变角分布,提取裂变核自旋值,讨论其随入射能的变化关系.此外,还讨论了与复杂粒子符合的裂变角分布.
The velocities and angular distributions of fission partner emitted from reaction in ^(2(?))Si+^(197)Au system with energies from 5.5 up to 21.7 MeV/A are measured. These results show that when the in cident energies are larger than 10 MeV/A, the in complete fusion-fission (ICF) associated with in-complete linear momentum transfer (LMT) appears. Furthermore, when E.-m>200 MeV, as a companion of ICF, the sequential fission (SF) with lower LMT than that of ICF,has apparent yields. By the difference of LMT for ICF and SF, the ratio of SF over total fission cross-section has been obtained. Meanwhile, the distribution around the reaction plane of one fragment with a standard deviation has been obtained. It seems that there is a simple linear global relationship between the deviation and excitation energy per nucleon in heavier composite systems.
出处
《高能物理与核物理》
CSCD
北大核心
1990年第8期739-742,共4页
High Energy Physics and Nuclear Physics
基金
国家自然科学基金
