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Structured emission induced by ArF laser excitation of ketene in a molecular beam

✍ Scribed by Javier Ruiz; Margarita Martin

Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
432 KB
Volume
226
Category
Article
ISSN
0009-2614

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✦ Synopsis

Structured emission at wavelengths 540-690 nm is observed following ArF laser excitation of a molecular beam of ketene. The emission depends linearly on laser energy. The fluorescence shows a fast risetime and biexponential decay. Under the lowest collision regime studied the fast and slow components of the decay have time constants of 1.9 f 0.7 ps and 7.2 f 0.8 ps respectively. The observed emission is tentatively assigned to fluorescence from vibrationally excited CHr ( 'Br ); formation of the latter in the photodissociation of ketene has been predicted theoretically but no previous experimental observation has been reported.

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