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Photodissociation dynamics of dichlorodifluoromethane (CF2Cl2) around ~235nm using the time-sliced velocity map imaging technology
茆锐
作者单位E-mail
茆锐 常州工学院 maor@czu.cn 
摘要:
Photodissociation dynamics of dichlorodifluoromethane (CF2Cl2) around ~235 nm has been studied using the time-sliced velocity map imaging technology and in combination with the resonance enhance multiphoton ionization technology. By measuring the raw images of chlorine atoms which are formed via one-photon dissociation of CF2Cl2, the speed and angular distributions can be directly obtained. The speed distribution of excited-state chlorine atoms consists of high translation energy (ET) and low ET components, which are related to direct dissociation on state and predissociation on the ground state induced by internal conversion respectively. The speed distribution of ground-state chlorine atoms also consists of high ET and low ET components, which are related to predissociation between and states and predissociation on the ground state induced by internal conversion respectively. Radical dissociation channel is confirmed, neverthess, secondary dissociation and three-body dissociation channels are excluded.
关键词:  photodissociation dynamics, time-sliced velocity map imaging, dichlorodifluoromethane
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Photodissociation dynamics of dichlorodifluoromethane (CF2Cl2) around ~235nm using the time-sliced velocity map imaging technology
Rui Mao
Abstract:
Photodissociation dynamics of dichlorodifluoromethane (CF2Cl2) around ~235 nm has been studied using the time-sliced velocity map imaging technology and in combination with the resonance enhance multiphoton ionization technology. By measuring the raw images of chlorine atoms which are formed via one-photon dissociation of CF2Cl2, the speed and angular distributions can be directly obtained. The speed distribution of excited-state chlorine atoms consists of high translation energy (ET) and low ET components, which are related to direct dissociation on state and predissociation on the ground state induced by internal conversion respectively. The speed distribution of ground-state chlorine atoms also consists of high ET and low ET components, which are related to predissociation between and states and predissociation on the ground state induced by internal conversion respectively. Radical dissociation channel is confirmed, neverthess, secondary dissociation and three-body dissociation channels are excluded.
Key words:  photodissociation dynamics, time-sliced velocity map imaging, dichlorodifluoromethane