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用含时黄金规则波包法,计算了低初始振动激发HeI_2分子振动预离解总和分衰变宽度,寿命和速率及它们随初始振动态υ的变化.计算结果与实验外推数据符合得相当好.计算所需很短的波包总传播时间(不超过1ps)是由离解碎片在振动去激发绝热势能面(υ-1)上驻留时间决定的.较强的终态相互作用的影响是很重要的.预言并解释了终转动态分布随着υ的移动而改变的动力学规律.
The time-dependent decay widths, lifetimes and velocities of the pre-disintegration vibrational vibration of HeI_2 molecules excited by low initial vibration and their variations with the initial vibrational state υ are calculated by the time-dependent golden rule wave method. The calculated results are in good agreement with the experimental extrapolation data. The calculation of the required short wave packet total propagation time (not to exceed 1 ps) is determined by the residence time of the dissociated fragment on the vibrational de-excitation adiabatic potential energy surface (υ-1) .The effect of strong final-state interaction is very strong It is important to predict and explain the dynamic laws that change the dynamic distribution of final revolution with υ.