Flow-Tube Studies of Vibrational Energy Transfer HF(v) + HF, DF(v) + HF, and DF(v) + D2 Systems.
Abstract
A medium-pressure (1-Torr), large-diameter (10-cm) flow tube has been used to measure rate coefficients at 298 K for (1) total relaxation (sum of vibrational-vibrational and vibrational-rotational, translational processes) of HF(v= 1,2, 3, 4, and 5) by HF, (2) relaxation of DF(1, 2, 3, and 4) by HF, and (3) overall relaxation of DF(v = 1, 2, 3, and 4) by D2. The chemically produced vibrationally excited HF or DF species have been studied by monitoring their vibrational-rotational emission in a fast-flow system. The rate coefficient for the relaxation of HF(1) by HF is 53000/sec torr. The measured rate coefficients for the de-excitation of HF(v= 2, 3, 4, and 5) by HF are 530000, 800000, 880000 and 280000/sec Torr, respectively. The rate coefficients for the vibrational-rotational, translational de-excitation from the upper vibrational levels of DF(v) by HF are found to have a nonlinear vibrational dependence. The rate coefficient for the relaxation of DF(v = 1) by D2 is 13500/sec Torr. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 23, 1976
- Accession Number
- ADA029981
Entities
People
- Munson A. Kwok
- Roger L. Wilkins
Organizations
- The Aerospace Corporation