Infrared double-resonance spectroscopy of V-T, R relaxation of HF (v = 1) using an F-center laser
Abstract
Infrared double resonance studies of the V-T, R relaxation of HF (v = 1) by HF are performed using a tunable F-center laser. A substantial fraction of the total vibrational relaxation occurs through the high-lying rotational levels of v = 0. The results indicate that J = 10-14 comprise approximately 20-40 percent of the population in the total relaxation, with the distribution increasing rapidly with decreasing J in this range. The observed signals, corrected for cascade, correspond to the fractions: J = 10, approximately 10-40 percent; J = 11, approximately 4-10 percent; J = 12, approximately 2-6 percent; J = 13, approximately 1-2 percent; J = 14, approximately 0.5-0.35 percent. In addition, the V-T, R rate determined here, k = 1.46 + or - 0.15 x 10 to the -12th cu cm molecule per s, reconfirms previous double resonance results. Also, studies involving buffer gas addition (Ar) give no indication of 'bottleneck' effects on the high-J's. In fact, the R-R, T rates (approximately 10 to the -10th cu cm molecule per s) always exceed the V-T, R rate by one to two orders of magnitude.
- Publication:
-
Lasers 1983; Proceedings of the International Conference
- Pub Date:
- 1985
- Bibcode:
- 1985lase.conf..189H
- Keywords:
-
- Infrared Spectroscopy;
- Laser Pumping;
- Molecular Energy Levels;
- Molecular Relaxation;
- Molecular Rotation;
- Tunable Lasers;
- Energy Transfer;
- Equipment Specifications;
- Hydrofluoric Acid;
- Population Theory;
- Lasers and Masers