Acta Phys. -Chim. Sin. ›› 1994, Vol. 10 ›› Issue (04): 330-335.doi: 10.3866/PKU.WHXB19940409

• ARTICLE • Previous Articles     Next Articles

The Study of Energy Transfer from Vibrational State to Electronic State in C2H4-K System

Li Quan-Xin, Yu Shu-Qin, Chen Cong-Xiang, Ma Xing-Xiao   

  1. Department of Modern Chemistry, University of Science and Technology of China, Hefei 230026
  • Received:1992-09-02 Revised:1993-01-26 Published:1994-04-15
  • Contact: Li Quan-Xin

Abstract:

Ethylene molecules were excited to high vibrational states by a TEA CO_2 laser, and then coilided with ground electronic state potassium atoms, in order to study the vibrational state to electronic state (V-E) energy transfer. The rate constants have been obtained by fitting the measuxed tdrie-resolved potassium atom flou-rescence to a proposed kinetic energy level group model. The measured rate constants of the V-E energy transfer in C_2H_4-K system are about 10~(-10)/cm~3·molec s~(-1). in the temperature range 453—663 K. The corresponding cross sections vary from 0.30—0.80 nm and decrease with increasing temperature. The experimental results indicate that attractive interaction play a role in the above non-resonant V-E energy transfer. This results have been discussed based on a collision complex model involving multipole interaction potential.

Key words: High vibrationally excited state, V-E energy transfer, Rate constant, Cross section, Collision complex model, Energy level group model