Decay of the first triplet Kr/sub 2/ excimer in the presence and absence of N/sub 2/ and effects of N/sub 2/ on the decay constant and excimer yield at 298 K

Journal Article · Fri Jan 15 04:00:00 EST 1988 · J. Chem. Phys.; (United States)

OSTI ID:5612749

Firestone, R F; Selander, W E

The optical absorbance of Kr/sub 2/ (/sup 3/summation/sup +//sub u/)(1/sub u/,0/sup -//sub u/) at 984 nm has been measured as a function of time at 250 to 1100 Torr in pure krypton and in the presence of N/sub 2/ at 800 Torr of krypton at 298 K. The decay constant is given by 2.53 ( +- 0.19)10/sup 6/+194( +- 84)P/sub Kr/ s/sup -1/ in the absence of N/sub 2/. The rate constant for electronic quenching by N/sub 2/ is 7.65( +- 0.34)10/sup -12/ cm/sup 3/ s/sup -1/. All observations are consistent with the formation of a long-lived ''bottleneck'' species associated kinetically with the Kr(1s/sub 2/) state as proposed by Bonifield et al. The bottleneck is essentially unaffected by the presence of N/sub 2/ below 10 Torr. It is suggested that the bottleneck species is a bound molecular state which correlates with one of the Kr(2p) atomic states in the separated atom limit.

• Research Organization: Department of Chemistry, The Ohio State University, Columbus, Ohio 43210
• OSTI ID: 5612749
• Journal Information: J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 88:2; ISSN JCPSA
• Country of Publication: United States
• Language: English

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420300* -- Engineering-- Lasers-- (-1989)
COLLISIONS
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DIMERS
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ENERGY-LEVEL TRANSITIONS
EXCIMER LASERS
FLUIDS
GAS LASERS
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