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arXiv 2004.01390physics.atom-ph
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里德伯原子取向对其碰撞电离截面的影响

The effect of orientation of Rydberg atoms on their collisional ionization cross section

Akilesh Venkatesh, Francis Robicheaux

摘要:

研究了两个里德伯原子在相对运动中的碰撞电离。用经典的轨道蒙特卡罗方法计算了Penning电离的截面。研究了电离截面与电子轨道角动量的大小、方向以及电子的Laplace-Runge-Lenz矢量的方向的关系。对于给定的角动量大小,在具有最高和最低电离截面的取向之间的电离截面中可以存在高达$\sim2.5$的因子的差异。交换电离的情况下检查和角动量的大小的依赖关系进行了研究。

英文摘要:

Collisional ionization between two Rydberg atoms in relative motion is examined. A classical trajectory Monte Carlo method is used to determine the cross sections associated with Penning ionization. The dependence of the ionization cross section on the magnitude and the direction of orbital angular momentum of the electrons and the direction of the Laplace-Runge-Lenz vector of the electrons is studied. For a given magnitude of angular momentum, there can exist a difference of a factor of up to $\sim2.5$ in the ionization cross section between the orientation with the highest and the lowest ionization cross section. The case of exchange ionization is examined and its dependence on the magnitude of angular momentum is studied.

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