Accession Number:

AD0729442

Title:

Vibrational Excitation of Deuterium Fluoride and Hydrogen Fluoride by Atomic and Diatomic Species.

Descriptive Note:

Technical rept. Nov 70-Jun 71,

Corporate Author:

AIR FORCE ROCKET PROPULSION LAB EDWARDS AFB CALIF

Report Date:

1971-07-01

Pagination or Media Count:

36.0

Abstract:

The vibrational excitations of HF and DF and the energy transfer efficiencies for various collision partners were investigated over the temperature range of 1400K to 4100K. The extent of excitation was determined as a function of time by continuously monitoring the infrared emission intensity at the center of the 1-0 vibration-rotation band of the molecule. Collisional efficiencies of HF, N2, O2, F, Cl, and DF in relaxing HF and of DF, HF, and N2 in relaxing DF are reported. A comparison of relaxation data for pure HF taken at elevated temperatures with data currently available from studies near room temperature suggests that long-range attractive forces are, mechanistically, of major importance in the relaxation process. The very high efficiency of atomic chlorine in relaxing HF is discussed in terms of the previous result for atomic fluorine. Author

Subject Categories:

  • Atomic and Molecular Physics and Spectroscopy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE