转动传能中干涉相位角的时间特性

The time characteristics of phase-interfering angle on rotational energy transferring

不同碰撞系统在碰撞过程中转动传能的量子干涉角度并不相同.而对干涉角的计算需采取最符合系统的相互作用势.从含时微扰的一级波恩近似出发,利用各向异性相互作用势,进一步研究了CO单三混合态在和He做碰撞伴时其跃迁振幅和干涉相位角的时间特性,计算显示跃迁振幅随时间显现衰减的震荡;对于给定的碰撞参数和碰撞速度,跃迁振幅变化非常明显并与跃迁前后的状态、能级差相关.

The quantuminterfering phase angle on rotational energy during the collision differs in differ ent collision system. The interaction potentials of mostly favoredsystem were performed in computing the interfering phase angle. From the timedependent perturbation of Born approximation, and combina tion with using anisotropic interaction potential, the transition amplitude and time characteristics of the interfering phase angle were further studied in the state of CO in a singlethree mixing state and in colli ding with He. The results show that the transition amplitude decayed with timing. Given collision pa rameters and speed, the transition amplitude has significant changes and it has the relationship with the transition state and energy gap before and after the transition.