Si2+离子与氢原子碰撞电离过程的CTMC计算

应用经典径迹蒙特卡罗方法研究Si²⁺离子与氢原子碰撞电离反应过程.计算了随 入射离子能量变化的总截面、出射电子随角度和能量变化的一阶、二阶微分截面,及出射电子随 入射离子能量变化的平均能量.根据计算结果,讨论展示了软碰撞、电子转移到入射离子连 续态、两体相遇碰撞等电离机理,阐明了它们对碰撞总截面、微分截面、电离电子能量的影 响.通过计算出射电子到入射离子和靶的距离比的电离电子数分布研究了不同入射离子能量 “鞍点”电离机理的可能性. 关键词： 重粒子碰撞过程 经典径迹蒙特卡罗方法 电离机理

CTMC calculation of Si2+ + H impact ionization

The Si²⁺ + H collision ionization is studied using classical trajecto ry Mo nte-Carlo (CTMC) method. The total cross section as functions of the energy of i ncident projectile, single differential cross section and double differential cr oss section as a functions of the energy and the angle of the ejected electron a re calculated. The ionization mechanisms of soft collision, electron capture to the continuum state,binary encounter collision are demonstrated. The effect of “saddle point" is also discussed by calculating the ejected electron distributi on depending on the ratios of distances between electron and target and between electron and projectile.