大能量损失小动量转移几何条件下氦原子(e,2e)反应的理论研究  

A theoretical study on (e,2e) process for helium in large energy loss and close to minimum momentum transfer geometry

作　　者：杨欢[1] 高矿[1] 张穗萌[1,2] 

机构地区：[1]安徽师范大学物理与电子信息学院 [2]安徽皖西学院数理系原子与分子物理研究所,六安237012

出　　处：《物理学报》2007年第9期5202-5208,共7页Acta Physica Sinica

基　　金：安徽省教育厅重大科研项目基金(批准号:ZD2007002-1);安徽省原子与分子物理重点学科基金;安徽省自然科学基金(批准号:03406203);安徽省高校拔尖人才专项基金(批准号:[2003]022)资助的课题.~~

摘　　要：用BBK模型和修正后的BBK模型在共面、大的能量损失和近于最小的动量转移这一特殊几何条件下对氦原子的三重微分散射截面进行了理论计算和研究,对截面的结构进行了分析,并把计算结果与最新实验测量结果进行比较发现:BBK模型和修正后的BBK模型均给出了与实验结果较符合的binary峰和recoil峰的比率以及双峰的角分布.The triple differential cross section for electron impact ionization of helium in the special geometry of coplanar large energy loss and close to minimum momentum transfer are calculated by use of BBK model and modified BBK model. The structure of the cross section is discussed.The results of the present work are compared with current experimental data. It is found that both BBK and modified BBK models are in good agreement with the experimental results of binary-to-recoil peak ratio and their angular distribution.

关 键 词：BINARY峰 RECOIL峰 能量损失 动量转移 

分 类 号：O562[理学—原子与分子物理]