Acta Phys. -Chim. Sin. ›› 1995, Vol. 11 ›› Issue (02): 123-130.doi: 10.3866/PKU.WHXB19950206

• ARTICLE • Previous Articles     Next Articles

Dissociative Excitation of CH3NO2 by Collisions with HE(23S) and Ne(3P0.2)

Yu Hua-Zhong, Wang Li-Ming, Li Xue-Chu, Gu Yue-Shu, Sun Qi, Yin Yong-Jia   

  1. State Key Laboratory of Molecular Reaction Dynamics,Dalian Institute of Chem.Phys.CAS Dalian 116023
  • Received:1993-12-25 Revised:1994-04-05 Published:1995-02-15
  • Contact: Li Xue-Chu

Abstract:

Dissociative excitation of CH3NO2 by collision with He(23S) and Ne(3Po.2)has been studied respectively by observing CH(A2△→ X2п,B2∑→ X2п) andC2∑ → X2п and H (Balmer) (only in the He(23S)/CH3NO2 reaction) emissions in the beam apparatus under single collision. The emission rate constants of A - X, B – X and C - X of CH and H produced from the He(23S)/CH3NO2 reaction were determined by using the reference reaction method. The nascent vibrational distributions and rotational temperatures of CH(A) were determined through computer simulation assumming a Boltzmann rotational distribution. The dissociative process and the formation mechanism of CH(A) were studied, and a two-body dissociative process through an intermediate CH3* for CH(A)was suggested.

Key words: Dissociative excitation, Emission rate, Rovibrational population