Breakup Effect of Weakly Bound Projectile on the Barrier Distribution Around Coulomb Barrier  

作　　者：贾会明 林承键 张焕乔 刘祖华 喻宁 杨峰 徐新星 贾飞 吴振东 张世涛 

机构地区：[1]China Institute of Atomic Energy

出　　处：《Plasma Science and Technology》2012年第5期390-392,共3页等离子体科学和技术（英文版）

基　　金：supported by National Natural Science Foundation of China (Nos.10575134,10675169,10735100);Major State Basic Research Developing Program (No.2007CB815003)

摘　　要：The excitation function of quasi-elastic （QEL） scattering at a backward angle has been measured for 9^Be＋208^Pb. The barrier distribution was extracted by means of the first derivative of the measured excitation function and calculated with the coupled-channel model. The present work shows that the experimental barrier distribution extracted from QEL scattering is shifted to the low energy side by 1.5 MeV as compared with the theoretical one. This energy discrepancy indicates that breakup is important in the colliding processes of the weakly bound nucleus system.The excitation function of quasi-elastic （QEL） scattering at a backward angle has been measured for 9^Be＋208^Pb. The barrier distribution was extracted by means of the first derivative of the measured excitation function and calculated with the coupled-channel model. The present work shows that the experimental barrier distribution extracted from QEL scattering is shifted to the low energy side by 1.5 MeV as compared with the theoretical one. This energy discrepancy indicates that breakup is important in the colliding processes of the weakly bound nucleus system.

关 键 词：quasi-elastic scattering barrier distribution coupled-channel model 

分 类 号：O571.4[理学—粒子物理与原子核物理]