18 September 1995 Radiative lifetimes and electronic state quenching of CH2CHO(B2A")
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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.
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Katherine I. Barnhard, Min He, Brad R. Weiner, "Radiative lifetimes and electronic state quenching of CH2CHO(B2A")", Proc. SPIE 2548, Laser Techniques for State-Selected and State-to-State Chemistry III, (18 September 1995); doi: 10.1117/12.220837; https://doi.org/10.1117/12.220837
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