Deexcitation of Ne(~3P_1) in Collisions with O_2, CO_2 and CH_4

摘要

Collisional deexcitation of excited rare gas atoms by atoms and molecules is of great importance in both fundamental and applied sciences, which provides the essential features of chemical reactions, in particular, those including electronic energy transfer. The collisional deexcitation is a key also to understand fundamental processes in the interaction of ionizing radiation with matter and the phenomena in ionized gases such as reactive plasmas and upper atmosphere. Excited neon atoms have a large amount of internal energy enough to ionize O_2, CO_2 and CH_4 at thermal energy. In this experiment, the temperature dependence of the rate constants for the deexcitation of Ne(~3P_1) by O_2, CO_2 and CH_4 is measured in the temperature range from 134K to 289K using a pulse radiolysis method as combined with time-resolved optical absorption spectroscopy and thus the collisional energy dependence of the deexcitation cross sections is obtained.