Affiliation:
1. Department of Chemistry, University of Illinois at Chicago, Chicago 60680, Illinois, USA
Abstract
The method of time-resolved optoacoustics was used to measure the rate of vibrational
relaxation of CH3Cl(ν6) and CH3Br(ν6) by Ar. The pressure pulses generated by the
relaxing gas revealed that the rate of production of translational energy from ν6 = 1 is
approximately twice the decay rate of IR fluorescence from
ν3 = 1. No evidence was
found for a previously proposed bottleneck in rotational relaxation, which would have
resulted in an acoustic relaxation rate slower than the fluorescence decay. The faster
rates observed here can be explained qualitatively by a rapid energy release from energy levels above ν3 which precedes the IR fluorescence. A simple three-level model,
however, is unable to explain our observations quantitatively.
Subject
Spectroscopy,Biochemistry,Atomic and Molecular Physics, and Optics
Cited by
21 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献