三步锂原子激光共振电离计算

Calculation for lithium atoms by laser resonance ionization

用Ｎｄ：ＹＡＧ及其泵浦的染料激光进行锂原子三步共振电离。求解非饱和共振过程的速率方程；计算基态和激发态的共振吸收截面；给出电离效率分别与激发、电高速率以及作用时间的变化关系；得出饱和激发电离的流量条件和通量条件等，并进行了讨论。

In this paper,we study the lithium atoms resonance ionization with Nd:YAG and it’s pumped dyelaser.The rate equations for a three level system are soled in cases of unsaturation resonance process.We calculatethe absorption cross section for initial state and excitant state,gained that the ionization efficiency relating to therate of excitation and ionization and the interaction time respectivily,and obtained the conditions on the photon fluxand fluence for saturated excitation andionization. Last we carry out a series of discussion.