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Crossed beam collisional excitation of pyrimidine from the laser-prepared T1 state into the S1 state

โœ Scribed by Ch. Ottinger; A.F. Vilesov

Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
683 KB
Volume
224
Category
Article
ISSN
0009-2614

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โœฆ Synopsis

Pyrimidine molecules in a pulsed seeded beam were laser excited via the T , +So forbidden transition. Downstream from the excitation region the pyrimidine molecules, prepared in a well-specified vibrational level (excitation in the 338 nm band) of the long-lived T, state, collided with Xe atoms from a secondary pulsed beam. This led to endothermic energy transfer to the S, state, which was detected by the subsequent S , + So emission, having a wavelength shorter than that used for the laser excitation. The cross section for this process was estimated and its dependence on the collision energy was measured.

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