Experimental study of the production of electronically excited IF in a supersonic flow

Francois Voignier; B. Leporcq

doi:10.1117/12.144645

4 May 1993 Experimental study of the production of electronically excited IF in a supersonic flow

Francois Voignier, B. Leporcq

Proceedings Volume 1810, 9th International Symposium on Gas Flow and Chemical Lasers; (1993) https://doi.org/10.1117/12.144645
Event: Ninth International Symposium on Gas Flow and Chemical Lasers, 1992, Heraklion, Greece

Abstract

The B yields X electronic transition of the iodine monofluoride (IF) molecule is a well known potential system for a chemical laser operating at visible wavelengths. By using the reaction between fluorine atoms and excited atomic iodine, IF(B) was produced in a supersonic flow. F and I atoms are produced in a combustor and excited I atoms are produced by mixing excited O₂(¹(Delta) ) to the expanded supersonic flow of combustion products. Chemiluminescence of IF was observed at a pressure ranging from 5 to 10 Torr. Experimental spectra have been recorded and compared to synthetic ones. A population density of IF(B) close to 4 X 10⁹ molecules/cm³ has been determined. No laser effect has been observed. A computer code has been developed and applied to the kinetic scheme. Calculated gain profiles, IF(B) population density, and laser power are in disagreement with the experimental values. Adding fluorine (F₂) to the flow increases the measured population density of IF(B) by a factor of 10. This value seems to confirm the existence of the step I^* + F₂ yields IF₂ in the production of IF(B).

Citation Download Citation

Francois Voignier and B. Leporcq "Experimental study of the production of electronically excited IF in a supersonic flow", Proc. SPIE 1810, 9th International Symposium on Gas Flow and Chemical Lasers, (4 May 1993); https://doi.org/10.1117/12.144645

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