熔合势垒形状的唯像研究  

Study on the Fusion Barrier Shape Through Phenomenological Approach

作　　者：张玉峰[1] 田俊龙[1] 陈兵[1] 

机构地区：[1]安阳师范学院物理与电气工程学院,河南安阳455000

出　　处：《郑州大学学报（理学版）》2014年第4期45-48,共4页Journal of Zhengzhou University:Natural Science Edition

基　　金：国家自然科学基金资助项目;编号11005003;11005002;13005003;U1204115;河南省教育厅自然科学基金资助项目;编号2011A140001;河南省高等学校青年骨干教师项目;编号2011GGJS-147

摘　　要：根据唯像理论构造了一个势垒顶部出现凹槽的熔合势垒模型,来解决利用现有势垒模型计算出的熔合截面数据与实验数据不相符的问题.使用多级势近似方法计算了不同反应体系的熔合反应截面,发现当势垒厚度和凹槽的位置合适时,计算出的熔合截面数据和实验数据高度符合.该研究为进一步澄清熔合反应中熔合势垒的形状、重离子垒下熔合机制等相关研究提供参考.In order to solve the problems that the calculated results could not fit well with the experimental data in existing fusion barrier model,a fusion barrier model with a groove at the top of the fusion barrier was constructed through phenomenological approach. Fusion reaction cross sections of different reaction system were calculated by multi-step potential approximation method. The results indicated that the calculated cross sections were in good agreement with the experimental data when the barrier thickness and the position of the groove were adopted suitably. The study provided a reference for further clarification of fusion reaction barrier shape,heavy ions fusion mechanism at sub-barrier energies and other related researches.

关 键 词：熔合势垒 熔合几率 多级势近似 熔合截面 Bass势 

分 类 号：O571.4[理学—粒子物理与原子核物理]