Vibration—Vibration Energy Exchange between Carbon Monoxide and Methane

Abstract

The quenching of the vibrational fluorescence of CO by CH₄ has been measured between 303° and 363°K. The quenching arises from the vibration—vibration exchange: CO^*+CH₄=CO+CH₄^* where all molecules are in ground electronic states. The average number of collisions between CO^* and CH₄ required for a V–V transfer to occur varies from 33 000 at 303°K to 24 000 at 363°K.