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Pumping mechanism for the neon--nitrogen nuclear excited laser

Author
Cooper, G. W.
Published
United States : [publisher not identified], 1976.
[Oak Ridge, Tennessee] : [U.S. Atomic Energy Commission], 1976.
Physical Description
microfiche : negative ; 11 x 15 cm
Additional Creators
Miley, G. H., Verdeyen, J. T., and Wells, W. E.

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Summary
The neon-nitrogen laser has generated considerable interest having been pumped directly by nuclear radiation. Lasing was observed on two transitions of atomic N, the 3p/sup 2/ P/sub 3//sup 0/ ..-->.. 3s/sup 2/ P/sub 3/ (8629.24 A) and the 3p/sup 2/ D/sub 5//sup 0/ ..-->.. 3s/sup 2/ P/sub 3/ (9392.79 A). The Ne-N/sub 2/ system also lases in an afterglow of an electrical discharge, which has similar characteristics to a nuclear radiation generated plasma. In order to determine the physical processes for pumping this laser, a detailed study of the afterglow system has been performed. The pumping mechanism has been found to be collisional-radiative electron-ion recombination. Microwave quenching of both the laser and spontaneous afterglow light has shown conclusively that a recombination process directly produces a nitrogen atom in either the upper laser level or, more likely, in a higher lying energy level which rapidly de-excites to the upper laser level. Studies of the temperature dependence of the recombination coefficient indicate a collisional-radiative process allowing the recombining ion to be tentatively identified as N/sup +/. Since this process is highly compatible with the reactor produced plasma, it is not unreasonable to assume that this recombination process is also the pumping mechanism in the nuclear excited case.
Report Numbers
COO-2007-81; CONF-760683-2
Other Subject(s)
Collection
U.S. Atomic Energy Commission depository collection.
Note
DOE contract number: E(11-1)-2007
OSTI Identifier 7338591
Research organization: Illinois Univ., Urbana (USA).
Funding Information
Sponsored by US Energy Research and Development Administration (ERDA).
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