Premium
Vibrational excitation of deuterium fluoride and hydrogen fluoride by atomic and diatomic species
Author(s) -
Blauer J. A.,
Solomon W. C.,
Owens T. W.
Publication year - 1972
Publication title -
international journal of chemical kinetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.341
H-Index - 68
eISSN - 1097-4601
pISSN - 0538-8066
DOI - 10.1002/kin.550040306
Subject(s) - chemistry , hydrogen fluoride , diatomic molecule , hydrofluoric acid , deuterium , excitation , fluorine , atomic physics , vibrational energy relaxation , hydrogen , infrared , relaxation (psychology) , range (aeronautics) , molecule , analytical chemistry (journal) , inorganic chemistry , social psychology , psychology , physics , materials science , organic chemistry , optics , electrical engineering , composite material , engineering , chromatography
The vibrational excitation of HF 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, N 2 , O 2 , F, Cl, and DF in relaxing HF and of DF, HF, and N 2 in relaxing DF are reported. A comparison with relaxation data for pure HF 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., (τ P ) HF–HF /(τ P ) HF–C1 ≥ 5 at 3000°K is discussed in terms of our previous result for atomic fluorine, i.e., (τ P ) HF–HF /(τ P ) HF–F = 18.