激光感生碰撞能量转移末态几率

Probability of final state of laser induced collision energy transfer

引入两个中间态 ,采用四能级准分子理论模型 ,分析具有两组偶极 -偶极碰撞势的激光感生碰撞能量转移过程 ,使用Magnus -light近似即矩阵整体对角化法 ,从而考虑了末态对初态的影响 ,得出了激光感生碰撞能量转移的终态几率表达式 .该表达式适合描述弱场和强场LICET现象 .准分子能级漂移来源于碰撞漂移和强场漂移 ,碰撞漂移存在于谱的中心和谱的准稳态翼上 ,强场漂移存在于谱的准稳态翼 .从而得到不存在由三能级理论预言的谱中心位置有强场漂移的结论 ,与报道的大部分强场实验研究结果相一致 .

The process of laser induced collision energy transfer(LICET) with two dipole-dipole interactions is analyzed by the theory of four quasimolecular level model with two intermediate states. The probability of final state of LICET is deduced by the approximate method of Magnus light(totally diagonalized of matrix). The probability can describe LICET phenomenon in the strong laser field and weak laser field.The drift of quasimolecular level comes from collision drift and strong field drift. Collision drift exists at the center of spectrum while strong field drift exists in the quasistatic wing of spectrum. Strong field drift at the center of spectrum predicted by the three level theory, does not exist and this conclusion is same with research results reported in all strong field experiments.