Accession Number:

AD0657198

Title:

VIBRATIONAL RELAXATION IN CO2/D2O MIXTURES,

Descriptive Note:

Corporate Author:

MISSISSIPPI UNIV UNIVERSITY

Report Date:

1967-08-15

Pagination or Media Count:

22.0

Abstract:

Sound absorption and velocity measurements were made in carbon dioxideheavy water mixtures at 300, 400, and 500K. The results show that D2O is from 13 to 15 as efficient as H2O in de-exciting the bending mode vibration of CO2 in a molecular collision. The collision efficiency of D2O for de-exciting CO2 decreases with temperature at an even greater rate than does that of H2O. The large difference between D2O and H2O invalidates the chemical affinity explanation of effect of H2O on CO2. An approximate semi-classical calculation of the transition probability indicates that it is possible to attribute the relaxation to an interchange between the vibration of the CO2 and the rotation of the H2O or D2O. Author

Subject Categories:

  • Atomic and Molecular Physics and Spectroscopy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE