Accession Number : AD0635097

Title :   TRANSLATION TO VIBRATION TRANSITION PROBABILITIES IN CO2-H2 AND CO2-HE COLLITIONS.

Descriptive Note : Technical rept.

Corporate Author : MISSISSIPPI UNIV UNIVERSITY

Personal Author(s) : Lewis, James W. L. ; Shields,F. Douglas

Report Date : 01 JUL 1965

Pagination or Media Count : 39

Abstract : The probability of a collision transferring energy from translation to vibration generally increases with relative speeds with which the molecules collide. Measured transition probabilities, therefore, generally increase with temperature. Some years ago this expected temperature effect was observed to fail for CO2-H2O, CO2-H2 and CO2-He collisions. Widom and Bauer proposed an explanation for the first of these in terms of a chemical affinity between the CO2 and H2O molecules but their theoretical results were in disagreement with the experimental values available at the time. Recent experimental results have brought measured values more nearly in line with the Widom-Bauer calculations. This paper describes similar calculations for the CO2-H2 system and reports experimental results that indicate the collision efficiency for CO2-He increases normally with temperature. (Author)

Descriptors :   (*CARBON DIOXIDE, TRANSPORT PROPERTIES), (*HYDROGEN, TRANSPORT PROPERTIES), (*HELIUM, TRANSPORT PROPERTIES), CHEMICAL BONDS, VIBRATION, TRANSFORMATIONS, PROBABILITY, TEMPERATURE

Subject Categories : Physical Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE