原子与分子物理学报, 2003, 20 (3): 322, 网络出版: 2006-05-19
离子原子碰撞过程中反冲离子飞行时间谱的蒙特卡罗模拟研究
Monte Carlo simulation of time-of-flight spectrum produced in ion-atom coll isions
蒙特卡罗方法 麦克斯韦分布 飞行时间谱 离子原子碰撞 Monte Carlo technique Maxwell distribution time of flight ion atom collision
摘要
基于蒙特卡罗方法,建立了程序模拟离子与原子碰撞中的反冲离子飞行时间谱.模拟入射离子束的空间密度分布,原子束密度的空间分布,靶原子的初速度分布, 根据反应几率产生不同电荷态反冲离子,并求出反冲离子飞行时间后,对每次模拟事件根据飞行时间进行累计,就得到反冲离子的飞行时间谱.模拟结果与实验(Ar12+-Ar) 测量到的TOF谱进行了分析比较,并进行了定性讨论.
Abstract
A program is established based on the Monte Carlo technique to simulate the time of flight spectrum in ion atom collisions. For each collision event, the program produces the space density distributions of the projectile beam and of target atomic beam, initial velocity distribution of target atoms, and the charge states of recoil ion, respectively. The time of flight is then calculated and the TOF spectrum is accumulated event by event. Simulations are done for Ar 12+ -Ar collisions and compared with experiment results.
汪正林, 马新文, 杨威. 离子原子碰撞过程中反冲离子飞行时间谱的蒙特卡罗模拟研究[J]. 原子与分子物理学报, 2003, 20(3): 322. 汪正林, 马新文, 杨威. Monte Carlo simulation of time-of-flight spectrum produced in ion-atom coll isions[J]. Journal of Atomic and Molecular Physics, 2003, 20(3): 322.