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High-resolution study of collision-induced transitions from N2(A 3Σ+u, ν=10) to N2(B 3Πg, ν=2)

✍ Scribed by R. Bachmann; Ch. Ottinger; A.F. Vilesov

Publisher
Elsevier Science
Year
1993
Tongue
English
Weight
458 KB
Volume
203
Category
Article
ISSN
0009-2614

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✦ Synopsis

The collision-induced intramolecular energy transfer N2 (A '2: ) + M+N2 (B 'll,) + M was studied under molecular beam conditions using Xe and Nz as the collision partners. Specifically, the near-resonant transfer between the levels A, VI'= 1 O-B, u'= 2 was investigated by means of the product emission, isolated by an interference filter. The rotational and fine structure levels of the A, u"= 10 reactant state were labeled by selective narrow-band laser pumping. The laser was scanned over the whole B, 12+A, 10 band and the subsequent decrease in the collision-induced emission B, 2-A, 0 was recorded. Repeating the scan, the laserinduced fluorescence intensity was recorded. These spectra are similar, showing that there is no significant dependence of the cross section for collision-induced energy transfer on the rotational or fine structure state of the reactant N,( A, d'= IO) molecules.

' Fellow of the Alexander von Humboldt foundation, on leave

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