✦ LIBER ✦

The role of van der Waals molecules in vibrational relaxation kinetics

✍ Scribed by Anatoly A. Vostrikov; Sergei G. Mironov

Publisher: Elsevier Science
Year: 1983
Tongue: English
Weight: 402 KB
Volume: 101
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(83)87037-7

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✦ Synopsis

The relaxation kinetics of N20 and CO2 vibrationally exited molecules (VEhl) in two-phase gas-cluster systems was investigated under conditions of supersonic expansion with condensation. The catalytic effect of clusters on the vibrational relaxation rate was revealed. The relaxation rate of clustered VEM, R,, and the probability of relaxation of VEM per collision with a cluster. E as functions of the average number of molecules in a cluster, i. were obtained. Values of R, and p increase rapidly with increasing 8, and at fl= constant they decrease with decreasing cluster temperature. Recently much attention has been paid to the prob-le% of deactivation of vibrationally excited molecules (VEMs) in clusters (van der Waals molecules) and in the VEM transition to the cluster-bound state during adsorption [ 1,2] _ Some papers (see, for example ref. [3]) report that temperature dependence of V-T relaxation was found to deviate from the well-known Landau-Teller relationship in the low-temperature

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