~7Li+^(11)B体系唯象光学势的研究  

Study of ~7Li+^(11)B Phenomenological Optical Model Potentials

作　　者：杨磊[1] 林承键[1] 杨峰[1] 贾会明[1] 徐新星[1] 张焕乔[1] 刘祖华[1] 张世涛[1] 包鹏飞[1] 孙立杰[1] 

机构地区：[1]中国原子能科学研究院,北京102413

出　　处：《原子核物理评论》2013年第2期117-121,共5页Nuclear Physics Review

基　　金：国家自然科学基金资助项目(10727505;10975192)~~

摘　　要：实验测量了7Li+11B体系的弹性散射角分布,其中弹核7Li的入射能量分别为9.85,13.3,18.3,23.3和28.3 MeV,测量的角度范围为θc.m.≈15～80。通过对本次实验数据以及文献中34 MeV的数据拟合,抽取了该体系的唯象光学势参数。结果表明,在固定作用势形状因子下,势深度与能量具有线性相依的关系:实部深度随着弹核能量的增加而线性减小,而虚部深度则在平均值10.35 MeV附近变化。Angular distributions of 7Li＋llB elastic scattering were measured at Elab（7Li）=9.85, 13.3, 18.3, 23.3 and 28.3 MeV within the angular range of θc.m.≈15°～80°. The analyse of these angular distributions together with the data taken from literatures at Elab（TLi） = 34 MeV have been performed to extract the parameters of optical model potential. With the fixed geometrical shapes, the potential strengths show a concise relation to the reaction energy： the depths of real potential decrease linearly with energy increasing, whereas the depths of imaginary part just slightly vary around the average value of 10.35 MeV.

关 键 词：弱束缚核反应 奇A轻核反应 弹性散射角分布 光学模型势 能量相依性 

分 类 号：O571.6[理学—粒子物理与原子核物理]