Novel Chemical Laser Systems.
Final rept. 15 Jun 74-31 Mar 77,
CORNELL UNIV ITHACA N Y SCHOOL OF APPLIED AND ENGINEERING PHYSICS
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Chemiluminescence spectra were recorded for a variety of metal-oxidizer reactions and measurements of fluorescence rates were performed for molecular bonds and atomic emissions. Dissociation reactions to produce large concentrations of metal atoms on a short time scale were carried out by means of thermal, electrical and electron beams procedures. Nearly all systems studied had low fluorescence rates for product metal oxide or metal halide molecules. Laser action was observed for over 40 new wavelengths from 17 metal atoms formed from the dissociation of metal halides, hydrides, alkyls and carbonyls. These wavelengths were in the near IR from 1.152 to 14.54 microns and were identified with transitions in the atoms As, Bi, Cd, Fe, Ga, Ge, Hg, In, Ni, Pb, Se, Sn, Te, Tl, V and Zn. Electronically excited YCl was formed from the reaction of chlorine with Y metal chemiluminescent spectra from the excited YCl species were recorded in a shock tube-driven supersonic mixing flame. Strong emission was noted near 4000Z and weaker bands at longer wavelengths believed to arise from triplet states of chemically formed YCl. This reaction system is of interest because of a high photon yield, a high degree of specificity in energy disposal among product states and the possible existence of laser transitions of appropriate radiative lifetimes for chemical laser operation.
- Lasers and Masers