【摘要】 本文介绍了采用可调脉冲激光技术和时间分辨色散荧光方法研究态-态碰撞动力学的实验过程。在实验中直接观测了处于电子振动激发态B³Π_ou⁺（v＇=19）的碘分子在自碰撞事件中朝相邻振动态跃迁的衰变过程,得到态—态振动跃迁速率常数,k_v（19→18）=（2.21±0.33）×10^-11cm³s^-1mol^-1和k_v（19→20）=（1.44±0.20）×10^-11cm³s^-1mol^-1,所得结果相当好地满足细致平衡原理。此外,实验中还得到了处于B（v＇=19）态的碘分子的无碰撞半衰期和非辐射碰撞自淬灭的速率常数。更多还原

【Abstract】 This paper presents an experimental procedure to study state-to-state collisional dynamics by using tunable and pulsed laser techniques and timeresolved and dispersed fluorescence method. The decay processes of electronically and vibrationally excited iodine, B3Π0u+(v’ = 19), to the adjacent vibrational states in self-collisional events have been directly observed in experiments. The rate constants for the state-to-state vibrational transfer obtained are, kv(19 →18) = (2.21±0.33)×10-11cm3s-1mol-1 and kv(19→ 20) = (1.44 ± 0.20) × 10-11cm3s-1mol-l. These results are in satisfactory agreement with the principle of detailed balance. In addition, the collision-free lifetimes and the radiationless quenching rate constants in B(v’ = 19) were also obtained in the experiments.更多还原