Abstract：

　　Rotational excitation of the parent molecule typically has a relatively small impact on both the dynamics and product-state distribution because of the small amount of energy involved in (thermal) rotational excitation as well as the weak coupling between the parent rotation and the dissociative coordinate. On some occasions, rotational excitation can be very important. Here, I present two examples where the parent rotation controls the photodissociation dynamics. One is the photodissociation of O3 in the Hartley band, in which the alternations of even and odd states in rotational distribution are dependent of initial rotational states of parent molecules due to a lambda doublet propensity. In another case, initial rotational states can strongly influence the vibrational state distribution of CO fragment in HCO photodissociation in the A-band. Such unique phenomenon is rationalized by the dependence of the lifetime of the vibronic resonance facilitated by the Renner-Teller interaction. These two examples underscore the importance of rotational control in photodissociation.

报告人简介：

　　韩山雨的主要研究方向是化学反应动力学中的非绝热问题，包括光解反应，碰撞猝灭反应。在一些基元反应中揭示了若干量子效应引起的微观反应机制，发展了量子动力学和透热势能面方法。现在主攻同位素非质量依赖分馏理，在基元反应水平探究非质量依赖分馏成因，重点考察动力学引起的非质量依赖分馏。