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Volume 149,number 2 CHEMICAL PHYSICS LETTERS I2 August I988 SPECTRAL HOLE BURNING IN THE INHOMOGENEOUS vj ABSORPTION PROFILE
 

Summary: Volume 149,number 2 CHEMICAL PHYSICS LETTERS I2 August I988
SPECTRAL HOLE BURNING IN THE INHOMOGENEOUS vj ABSORPTION PROFILE
IN CH3F ISOLATED IN MIXED Ar :Kr MATRICES
J. KI-IADEMI I, H. KUNTTU ' and V.A. APKARIAN
Department of Chemistry, Institute for Surface and Intecface Science, Universitv qf Cakfornia, Irvine, CA 92717, USA
Received 16March 1988;in final form 16May 1988
Using two diode lasers, homogeneous spectral holes are burned and recorded in the inhomogeneous u1absorption profile of
CH,F isolated in mixed Ar:Kr matrices. The Lorentzian hole width, fwhm, is (9. I +0.5)x IOmJcm-' at 5 K and narrows to
(5.6? I )x lo-' cm-' at 9.35 K. The hole refilling time at 5 K is 2 10 s. The hole width is ascribed to dephasing by localized
librational modes, the refilling to thermal reorientation of the molecule in the trap site.
1. Introduction
Infrared-induced isomerization, dissociation and
bimolecular reactions, with various degrees of mode
specificity have been demonstrated in molecules iso-
lated in cryogenic rare-gas matrices [ 11. Rates of vi-
brational energy transfer and relaxation of both T,-
and T,-type processes in these systems are the crit-
ical data required for developing a fundamental un-
derstanding of the observed chemistry. The relevant
systems are polyatomics with large densities of states

  

Source: Apkarian, V. Ara - Department of Chemistry, University of California, Irvine

 

Collections: Chemistry