Vibrational excitation of deuterium fluoride and hydrogen fluoride by atomic and diatomic species

✍ Scribed by J. A. Blauer; W. C. Solomon; T. W. Owens

• Publisher: John Wiley and Sons
• Year: 1972
• Tongue: English
• Weight: 567 KB
• Volume: 4
• Category: Article
• ISSN: 0538-8066
• DOI: 10.1002/kin.550040306

✦ Synopsis

The vibrational excitation of H F and DF and the energy transfer efficiencies for various collision partners were investigated over the temperature and pressure ranges of 1400°K to 4100°K and 0.1 to 0.3 atm, respectively. 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, NB, 02, F, C1, and DF in relaxing H F and of DF, HF, and Nf in relaxing DF are reported. A comparison with relaxation data for pure H F taken at lower temperature suggests that long-range attractive forces are mechanistically of major importance in the relaxation process. The relatively high efficiency of atomic chlorine in relaxing HF, i.e., (TP)HF-HF/

( T P ) H F -c ~

2 5 at 3000°K is discussed in terms of our previous result for atomic fluorine, i.e., (TP)HF-HF/(TP)HF-F = 18.