Vibration-rotation-translation energy transfer in HF-HF and DF-DF
Technical Report
·
OSTI ID:7195387
The vibrational relaxation times of HF and DF were calculated on the basis of the vibration-rotation-translation energy transfer theory over the temperature range from 400 to 4000/sup 0/K. Up to about 2500/sup 0/K, DF molecules always relax slowly compared to HF, but at still higher temperatures they relax faster. This alternation in the isotope effect is due to the increased efficiency of the translational motion in removing the vibrational energy at elevated temperatures in DF-DF. In HF-HF the maximum value of the relaxation time at 1 atm appears at about 800/sup 0/K, and in DF-DF it occurs at about 700/sup 0/K. The appearance of the maximum values is due to the dipole-dipole attraction. The calculated values are in reasonable agreement with experiment.
- Research Organization:
- Nevada Univ., Reno (USA). Dept. of Chemistry
- OSTI ID:
- 7195387
- Report Number(s):
- AD-733129
- Country of Publication:
- United States
- Language:
- English
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