入射粒子与靶相互作用中电子能损的高阶修正  

Higher-order Corrections of Electronic Energy Loss in Interaction of Incident Particle with Targets

作　　者：朱宝珠[1,2,3] 张丰收[1,2,4] 罗飞[1,2] 李旸[1,2] 石颂剑[1,2] 王雄[1,2] 赵强[1,2] 周宏余[1,2] 

机构地区：[1]北京师范大学射线束技术与材料改性教育部重点实验室北京师范大学核科学与技术学院,北京100875 [2]北京市辐射中心,北京100875 [3]新疆大学物理科学与技术学院,新疆乌鲁木齐830046 [4]兰州重离子加速器国家实验室原子核理论中心,甘肃兰州730000

出　　处：《原子核物理评论》2008年第4期342-346,共5页Nuclear Physics Review

基　　金：国家自然科学基金资助项目(10575012,10435020);北京市教育委员会共建项目建设计划资助项目(XK100270454);北京师范大学科研基金~~

摘　　要：研究了在较高能入射离子(He离子、12C离子)与靶相互作用中电子能量损失的物理机制,分别探讨了电子能量损失中的相对论修正、壳修正、密度修正以及Barkas效应和Bloch效应等修正的贡献,发现壳修正、Barkas效应修正和Bloch效应修正在能量小于100MeV时是重要的,而相对论修正和密度修正是在能量大于100MeV时起作用。加入各种修正项之后,电子阻止本领的计算结果和实验值(ICRU49)符合更好。The mechanisms of electronic energy loss in the process of incident particles and Al2O3 at proper energies are investigated. The contribution to the electronic interaction with Si energy loss from high-order corrections, such as the relativistic correction, the .shell correction, the density correction, the Barkas-effect correction and the Bloch effect correction are discussed respectively. It is found that the shell correction, the Barkas-effect correction and the Bloch-effect correction are important at low energies, the relativistic correction and the density correction are important at high energies. The calculated results with these higher-order corrections are in good agreement with the experiment data（ICRU49）.

关 键 词：高阶修正 壳修正 密度修正 Barkas效应 Bloch效应 

分 类 号：O571.6[理学—粒子物理与原子核物理] Q7[理学—物理]