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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 12, Number 6
BKCSDE 12(6)
June 20, 1991

Title	Infrared Multiphoton Dissociation of CF2HCl: Laser Fluence Dependence and the Effect of Intermolecular Collisions
Author	Nam Woong Song, Kook Joe Shin, Sangyoub Lee, Kyung-Hoon Jung, Kwang Yul Choo, Seong Keun Kim*
Keywords
Abstract	The effect of intermolecular collisions in the infrared multiphoton dissociation (IRMPD) of difluorochloromethane was investigated using He, Ar, and N2 as buffer gases. The reaction probability for IRMPD of difluorochloromethane was measured as a function of laser fluence and the buffer gas pressure under unfocused beam geometry. It was observed that the reaction probability was initially enhanced with the increase of buffer gas pressure up to about 20 torr, but showed a decline at higher pressures. The reaction probability increases monotonically with the laser fluence, but the rate of increase diminishes at higher fluences. An attempt was made to simulate the experimental results by the method of energy grained master equation (EGME). From the parameters that fit the experimental data, the average energy loss per collision, < △E >d, was estimated for the He, Ar, and N2 buffer gases.
Page	652 - 658
Full Text	PDF

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