ISSN:
1089-7690
Source:
AIP Digital Archive
Topics:
Physics
,
Chemistry and Pharmacology
Notes:
Excited C2 H* is produced by vacuum ultraviolet photolysis of acetylene using a frequency tripled laser. Time-dependent emission is measured from 400–940 nm. The use of a coherent photolysis source produces an excitation spectrum in which the rotational band contour is resolved. The absorption spectrum of C2 H2 taken in the same apparatus closely resembles the excitation spectrum indicating a homogeneous predissociation. Time-dependent quenching of the C2 H* emission by Xe, Kr, Ar, He, N2, H2, D2, and C2 H2 is measured. The rapid quenching rates and lack of strong dependence on atomic weight suggest a spin-allowed process is involved in this channel of C2 H2 photolysis. Quench rates are compared with several theoretical models.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.454920
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