✦ LIBER ✦

Theoretical study of the low-temperature vibrational relaxation of o-H2 in collisions with 4He

✍ Scribed by Millard H. Alexander

Publisher: Elsevier Science
Year: 1976
Tongue: English
Weight: 473 KB
Volume: 38
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(76)80006-1

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✦ Synopsis

Cross secfiws and rate constants for the vibrat$onal Maxation of H&J = I,i= I) in collisions with 4He were determined using the coupled states method with a fulIy-converged channel basis. The interaction potential was taken to be that of Gordon and Secrest with the elastic matrix elements modified to include the spherically-symmetric component of the semi-empirical Shafer-Gordon potential. First-order forbidden transitions play a sig'nificznt role in the overall relaxation process. The cross sections for the de-excitation of the u= i,j= I level are slightly larger than those for the u= 1, j= 13 level. Ihe ratio of the corresponding rate constants for vibrational relaxation varies smoothly from a value of 1.25 at 500 K to 1.63 at 60 K.

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