强磁场下He^(2+)+H(1s)的碰撞电离微分截面及电离机理研究

The differential cross sections and mechanisms of ionization and in the collisions of He^(2+)+H(1s) with strong magnetic fields

应用经典径迹蒙特卡罗方法详细研究了强磁场环境下He(2+)+H(1s)的重粒子碰撞电离过程.首先得到了在不同强度的纵向和横向磁场下电离电子的一阶能量微分截面,发现它们不仅在数值上比未加磁场下的结果有明显的增加,而且随电离电子的能量变化不再是单调下降,而是呈现一定的峰值结构.通过对电离事例的分析,解释了这些变化形成的原因.其次由于强磁场会导致碰撞电离的物理机理有很大变化,因此也分析并解释了磁场强度、方向及入射粒子能量等因素对电离机理的影响行为.

The ionization processes in collisions of H （1s） atoms with He2＋are studied by the classical trajectory Monte Carlo method. The first-order differential cross sections for ionization are calculated for different field strengths of both transverse and parallel magnetic field, and they increase obviously with the fields applied. Instead of monotonic decline, a peak appears for the differential cross section, with the fields applied. According to the analysis of trajectories, the ionization mechanisms become quite different. In this paper, the influences the strength and direction of the applied field including the incident energy on the ionization mechanisms are also explained.