Title

Vibrational relaxation of acetylene produced by the photolysis of vinyl bromide

Document Type

Article

Publication Date

1-1-1992

Abstract

Vibrational relaxation of the v2 and 2v2 CC stretch vibrational states in the ground electronic state of acetylene has been investigated using infrared kinetic spectroscopy. Excited vibrational states of acetylene are produced by 193 nm ArF excimer laser photolysis of vinyl bromide in a room-temperature helium buffer gas. Vibrational state populations are probed by direct absorption with the continuous single-frequency output of a color center laser operating in the 3 μm region. The vibrational transitions observed were the v2 + v3 - v2 and the 2v 2 + v3 - 2v2 combination bands. Rate constants for He vibrational relaxation are 1.5(3)×10-14 and 2.1(7)×10-14 cm3 molecule-1 s -1 for v2 and 2v2, respectively. © 1992 American Institute of Physics.

Publication Source (Journal or Book title)

The Journal of Chemical Physics

First Page

5047

Last Page

5053

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