20～46.2MeV/u ^(12)C+^(64)Cu反应中线性动量转移及重余核质量产额分布研究  

Study of Linear Momentum Transfer and Mass Distribution of Residues in Collisions of ^(12)C with ^(Nat.)Cu at 20～46. 2MeV/u

作　　者：靳根明[1] 李文新[1] 孙彤玉[1] 吴定清[1] 孙儒林 赵莉莉[1] 尹新民[1] 罗清政 李泽[2] 敬友兴 李新华[2] 

机构地区：[1]中国科学院代物理研究所,兰州770000 [2]中国原子能科学研究院,北京102413

出　　处：《核物理动态》1993年第3期31-35,共5页

基　　金：国家自然科学基金委资助课题

摘　　要：利用核化学方法测量了20～46.2MeV/u^(12)C与铜靶核碰撞中重余核产物的平均反冲射程及余核产额,从而得到了该系统的线性动量转移及重余核质量产额分布随入射能量的变化,讨论了线性动量转移与靶核几何尺寸及系统尺寸的关系,利用两体衰变理论对重余核质量产额分布进行了分析,并认为在这个能区,该碰撞系统所形成的激发核的主要衰变模式是相继两体衰变。The linear momentum transfer (LMT) and mass distribution of the residues in thecollisions of ^(12)C with ^(Nat)Cu in energy region of 20～46. 2MeV/u were measured by usingrediochemical method. Comparing the LMT in this system with that in other systems, linear dependenceof the maxium LMT for central collision on geometry of target nucleus was obtained, and the averageLMT then depended on the geometry of whole system. Comparision of the mass distribution measured here with theoretical calculation indicated that theexcited nuclei formed in the collisions at this energy region tended to sequentical binary decay.

关 键 词：质量分布 衰变 核反应 动量传递 

分 类 号：O571.4[理学—粒子物理与原子核物理]