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Chemical lasers produced from O( 3 P ) atom reactions. V. CO laser emissions and vibrational population distribution in the flash‐initiated SO 2 ‐CFBr 3 system
Author(s) -
Hsu David S. Y.,
Lin M. C.
Publication year - 1978
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.550100805
Subject(s) - chemistry , excited state , laser , population , atomic physics , vibrational temperature , flash (photography) , atom (system on chip) , flash photolysis , analytical chemistry (journal) , reaction rate constant , kinetics , optics , physics , demography , quantum mechanics , chromatography , embedded system , sociology , computer science
CO laser emission at 5 μm was detected when SO 2 and CFBr 3 were flash photolyzed in the vacuum ultraviolet above 165 nm. Over 40 vibrational–rotational transitions ranging from Δ v = 2 → 1 to 14 → 13, with the exception of those between 8 → 7 and 11 → 10, were identified. The CO emission is believed to result from the O + CF reaction:The vibrational population of the CO has been measured by means of a CO laser resonance absorption method. The CO was found to be vibrationally excited to v = 24 with a vibrational temperature of about 1.4 × 10 4 °K. The “surprisal analysis” of the observed CO distribution showed the possible occurrence of a minor process (presumably O + CFBr) that generated vibrationally colder CO. The effects of various additives on the CO emission were also examined. The addition of CO 2 to a D 2 ‐SO 2 ‐CFBr 3 ‐He mixture resulted in a simultaneous osciallation at 3.6, 5, and 10.6 μm due to DF, CO, and CO 2 , respectively. Additionally, the utilization of the O + CF n ( n = 1, 2, 3) reactions as F‐atom sources for HF‐laser operation in flash‐initiated systems were demonstrated.