Acta Phys. -Chim. Sin. ›› 1995, Vol. 11 ›› Issue (01): 31-37.doi: 10.3866/PKU.WHXB19950107

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Energy Transfer Reactions of Ar(3P0.2)与SO2,SOCl2 under the Single Collision Condition

Sun Qi, Gu Yue-Shu, Guo Jing-Zhong, Yin Yong-Jia, Li Xue-Chu, Shen Guan-Lin   

  1. Chemistry Department|Shandong University,Jinan 250100|State Key Laboaratory of Molecular Reaction Dynamics,Dalian Institute of Chemical Physics,CAS,Dalian 116023
  • Received:1993-10-04 Revised:1994-03-07 Published:1995-01-15
  • Contact: Gu Yue-Shu

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Abstract:

 Dissociative excitation of SO2,SOCl2 through single collision with Ar(3P0,2)have been studied by observing SO(A - X) emission in the beam apparatus. The nascent vibrational distribution of SO(A, υ＇) was determined. A Surprisal analysis of the nascent vibrational distribution of SO(A) indicated that the precursor molecules dissociation could occur predominately from superexcited states (Rydberg-states). The formation rate constants of SO(A) have been determined for Ar(3P0,2)/SO2 and Ar(3P0,2)/SOCl2 reactions, They are: 4．55×10－12cm3•molecule－1•s－1 and 2．87×10－12cm3•molecule－1•s－1, respectively. A comparison between the observed formation rate constants and known total quenching rate constants indicated that dissociative excitation processes are monitor exit channels.

Key words: Metastable atom, Dissociative excitation, Vibrational distribution, Reaction channel