^(27,28)P+^(28)Si总反应截面增强及可能相关的机制  

Enhancement of Total Reaction Cross Sections for ^(27,28)P with a ^(28)Si Target and Examination of Possibly Relevant Mechanisms

作　　者：刘祖华[1] 阮明[1] 赵跃林[1] 张焕乔[1] 杨峰[1] 马中玉[1] 林承键[1] 陈宝秋[1] 吴岳伟[1] 詹文龙[2] 郭忠言[2] 肖国青[2] 徐瑚珊[2] 孙志宇[2] 李加兴[2] 陈志强[2] 

机构地区：[1]中国原子能科学研究院,北京102413 [2]中国科学院近代物理研究所,甘肃兰州730000

出　　处：《原子核物理评论》2004年第4期266-270,共5页Nuclear Physics Review

基　　金：国家自然科学基金资助项目(10175092;10235030;10275092;10275094);国家重点基础研究发展规划资助项目(G2000077406)~~

摘　　要：测量了27,28P和相应同中子异位素在28Si靶上的中能反应截面.测得N=12和13同中子异位素的反应截面在Z=15处突然增大.对Z≤14同中子异位素和28P的实验数据结果可以用改进的光学极限近似的Glauber理论很好地描述.28P的反应截面能够用扩大核芯以改进的Glauber理论来解释.但是,用改进光学极限和少体近似的Glauber理论却低估了27P的实验数据.理论分析表明,扩大的核芯加质子晕可能是响应27P+28Si反应截面增强的机制.The reaction cross sections of^(27,28)P and the corresponding isotones on Si target were measured at intermediate energies. The measured reaction cross sections of the N=12 and 13 isotones show an abrupt increase at Z=15. The experimental results for the isotones with Z≤14 and^(28)P can be described well by the modified Glauber theory of the optical limit approach. The enhancement of the reaction cross section for^(28)P could be explained by the modified Glauber theory with an enlarged core. Theoretical analysis with the modified Glauber theory of the optical limit and few-body approaches shows that an enlarged core together with proton are probably the mechanism responsible for the enhancement of the cross sections for the reaction of^(27)P+^(28)Si.

关 键 词：反应截面 GLAUBER理论 近似 极限 实验数据 光学 质子 异位 机制 改进 

分 类 号：O571[理学—粒子物理与原子核物理]