Abstract
The principal kinetic processes necessary for formation of the upper laser level (8 electronic state) of the XeCl* excimer have been qualitatively identified, and it is generally accepted that the main pumping channels are the so-called harpooning reaction or ion-ion recombination. The components required for the above channels are either produced directly, as a result of electron collisions, or by some other form of energy transfer mechanism between a buffer gas and the constituent atomic species. These mechanisms predominantly produce the XelI* excimer in high vibrational levels of the B electronic state which subsequently relax to the level the vibrational level normally accessed by the optical field. Recent experimental observations1,2 have indicated that such relaxation processes are not sufficiently rapid to allow the B-state vibrational population to relax to a Boltzmann distribution corresponding to the ambient gas temperature. Consequently a significant fraction of the B-state population will lie in vibrational levels which do not contribute to the lasing process.
© 1983 Optical Society of America
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