Effect of quasiresonant dynamics on the predissociation of van der Waals molecules
Effect of quasiresonant dynamics on the predissociation of van der Waals molecules
复制标题
准共振动力学对范德华分子预解离的影响
DOI：
10.1103/physreva.64.022706
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发表时间：
2001
影响因子：
2.9
通讯作者：
E. Heller
中科院分区：
文献类型：
--
作者：
R. C. Forrey;N. Balakrishnan;A. Dalgarno;M. Haggerty;E. Heller
零温度碰撞速率系数的原子硅藻散射的旋转和振动分布一起使用的有效范围理论，以获得预解离的寿命。高阶间接势耦合的量子力学计算解释使用一个简单的经典图片，描述了准共振动力学的原子硅藻碰撞的经典作用守恒。讨论了封闭通道阈值在确定分布结构和动量隙与近共振效应之间平衡方面的重要性。
Rotational and vibrational distributions of zero-temperature collisional rate coefficients for atom-diatom scattering are used together with effective range theory to obtain lifetimes for predissociation. High-order indirect potential coupling in the quantum-mechanical calculation is interpreted using a simple classical picture that describes the quasiresonant dynamics of atom-diatom collisions by the conservation of classical action. The importance of closed channel thresholds in determining the structure of the distributions and the balance between momentum gap and near-resonant effects is discussed.