Applicability of the orientation average formula in heavy-ion fusion reactions of deformed nuclei
Applicability of the orientation average formula in heavy-ion fusion reactions of deformed nuclei
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取向平均公式在变形核重离子聚变反应中的适用性
DOI：
10.1103/physrevc.63.044603
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发表时间：
2000
期刊：
影响因子：
--
通讯作者：
N. Takigawa
中科院分区：
文献类型：
--
作者：
Tamanna Rumin;K. Hagino;N. Takigawa
在涉及变形良好的核的重离子聚变反应中，人们经常假设靶核的取向在反应过程中不改变。通过分析{sup 154}Sm靶与从{sup 12}C到{sup 40}Ar的各种射弹反应中的聚变截面激发函数和聚变势垒分布，讨论了该方法的准确性。结果表明，由于靶核激发能有限的影响，随着弹核和靶核电荷积的增大，近似逐渐失去精度。文中还讨论了这种不准确性在分析实验数据时的相关性。
In heavy-ion fusion reactions involving a well-deformed nucleus, one often assumes that the orientation of the target nucleus does not change during the reaction. We discuss the accuracy of this procedure by analyzing the excitation function of the fusion cross section and the fusion barrier distribution in the reactions of {sup 154}Sm target with various projectiles ranging from {sup 12}C to {sup 40}Ar. It is shown that the approximation gradually loses its accuracy with increasing charge product of the projectile and target nuclei because of the effects of finite excitation energy of the target nucleus. The relevance of such inaccuracy in analyzing the experimental data is also discussed.