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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 20, Number 12
BKCSDE 20(12)
December 20, 1999 

Studies of Radicals Generated in Supersonic Flash Pyrolysis by Laser Induced Fluorescence Spectroscopy
Hee-Kyung Kim, Han-Cheol Kwon, Jong-Ho Park, Young-Sang Choi, Jong-Ho Choi
Laser-induced fluorescence (LIF) spectroscopy has been applied to study the supersonic jet of radicals of nitric oxide (NO) and atomic iodine produced in the flash pyrolysis of precursors n-butylnitrite (CH3(CH2)3ONO) and allyl iodide (C3H5I), respectively. The systematic population analysis with spectral simulations demonstrates that the precursors are efficiently pyrolyzed and that radical beams show a substantial supersonic cooling. In addition, absence of local equilibrium was observed in the distributions of two electronic spin-orbit states 2Π1/2 and 2Π3/2 of NO products and can be rationalized in terms of the efficiency of collision-induced energy transfer rates.
1441 - 1446
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