Kinetic Study of H + HF(v = 3); Kinetic Isotope Effect and Temperature Dependence

Rates of HF(v = 3) removal by H and D atoms were measured between 200 and 295 K in a laser-induced fluorescence-discharge flow-tube apparatus. The removal rates by H atoms were found to increase from 6.3 x 10 to the 13th power cu. cm/mol-sec at 295 K to 10 to the 14th power cu. cm/mol-sec at 200 K....

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Bibliographic Details
Main Authors: Bott, Jerry F, Heidner, III, Raymond F
Format: Report
Language:English
Subjects:
Atomic and Molecular Physics and Spectroscopy
CHEMICAL LASERS
DECAY SCHEMES
DEUTERIUM
EXCITATION
HYDROGEN
HYDROGEN FLUORIDE
ISOTOPE EFFECT
LASER INDUCED FLUORESCENCE
Lasers and Masers
MOLECULAR VIBRATION
RATES
REACTION KINETICS
RELAXATION TIME
THERMAL PROPERTIES
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Summary:Rates of HF(v = 3) removal by H and D atoms were measured between 200 and 295 K in a laser-induced fluorescence-discharge flow-tube apparatus. The removal rates by H atoms were found to increase from 6.3 x 10 to the 13th power cu. cm/mol-sec at 295 K to 10 to the 14th power cu. cm/mol-sec at 200 K. The removal of HF(v = 3) by D atoms is somewhat slower, but the removal rates have a similar negative temperature dependence. There are several mechanisms by which H atoms can remove HF(v = 3), i.e., reaction to form H2 + F or deactivation to HF(v = 0, 1, or 2) with or without exchange of the F atom. The several possibilities are discussed and compared to theoretical calculations.