Cl+CHD3(v1=1)反应中的成对动态学:侦测激光波长的效应

用交叉分子束试验探讨氯原子与C?H 键激发的CHD3化学反应，并用(2+1)共振多光子电离及离子影像法来侦测CD3基态生成物．发现所得的影像对电离光子的波长极为敏感．这表明，与基态反应比较，C?H激发反应较易产生转动激发的CD3．实验结果也证明CD3D的转动与HCl的振动激发有相反的关联性．

Pair-correlated dynamics of the Cl + CHD3(v1=1) reaction: Effects of probe laser frequency

The reaction of C-H stretch-excited CHD3 with Cl atom was studied in a crossed-beam experiment by imaging of the ground vibrational state of CD3 products. he methyl product was interrogated by (2+1) resonance-enhanced multiphoton ionization via the Q-head of the origin band. We found that the observed image appearances depend sensitively on the precise frequency of the probe laser. We attributed the effects to the slight differences in the subset of N-levels of CD3(v=0) being sampled. The implication of collision dynamics is that, ompared to the ground-state reaction, the CH stretch-excited reaction preferentially yields rotationally warmer CD3(v=0) products. And a negative correlation between the CD3 rotational excitation and the vibrational excitation of the coincidently formed HCl coproducts was demonstrated, which enabled us to uncover a hidden, stereodynamical aspect of the title reaction.