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Proceedings Paper

Radiative lifetimes and electronic state quenching of CH2CHO(B2A")
Author(s): Katherine I. Barnhard; Min He; Brad R. Weiner
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Paper Abstract

Vibronic state specific radiative lifetimes and rate constants for electronic quenching are reported for four different vibrational modes of CH2CHO(B2A'). Vinoxy radicals are produced in the ground state by 193 nm excimer laser photolysis of methyl vinyl ether, and irradiated between 332 and 348 nm to generate the second excited state. Bimolecular quenching rate constants are determined in the presence of twelve collision partners: He, Ar, N2, O2, CO, H2, HCl, N2O, CO2, C2H4, CH3OCH equals CH2 and SF6. Radiative lifetimes are found to vary from 98 plus or minus 10 to 154 plus or minus 18 ns, depending on the vibronic level. Some possible mechanisms for lifetime shortening and collisional quenching are discussed.

Paper Details

Date Published: 18 September 1995
PDF: 10 pages
Proc. SPIE 2548, Laser Techniques for State-Selected and State-to-State Chemistry III, (18 September 1995); doi: 10.1117/12.220837
Show Author Affiliations
Katherine I. Barnhard, Univ. of Puerto Rico (United States)
Min He, Univ. of Puerto Rico (United States)
Brad R. Weiner, Univ. of Puerto Rico (United States)

Published in SPIE Proceedings Vol. 2548:
Laser Techniques for State-Selected and State-to-State Chemistry III
John W. Hepburn, Editor(s)

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