Photodissociation of vibrationally excited hydrogen bromide

15 July 1979

journal article
research article
Published by AIP Publishing in The Journal of Chemical Physics

Vol. 71 (2) , 713-722
https://doi.org/10.1063/1.438358

Abstract

A two‐step laser photodissociation technique was used to measure the cross section for photodissociation of HBr(v=1) at 258.9 nm. The cross section was found to be (5.5±1.1) ×10⁻²⁰ cm²/molecule and is 34±7 times larger than the cross section for photodissociation of HBr(v=0) at the same wavelength. A theoretical estimate of the ratio of cross sections, based on a ’’reflection approximation’’ treatment of the UV absorption spectrum of HBr, gave poor agreement with the experimental result. The limitations of simple approximations to the photodissociation process in the threshold region of a photodissociative transition are discussed.

Keywords

This publication has 37 references indexed in Scilit:

Effect of initial excitation in the photofragmentation of model HCN and DCN. Comparison between approximate and exact calculations
The Journal of Chemical Physics, 1977
Laser-induced fluorescence of CN(X2 Σ+) produced by photolysis of C2N2 at 160 nm
The Journal of Chemical Physics, 1977
Reactions of hydrogen atoms and hydroxyl radicals with hydrogen bromide
The Journal of Physical Chemistry, 1973
Photodissociation dynamics. Production of I*(2P1/2) atoms in the photolysis of hydrogen iodide
The Journal of Physical Chemistry, 1969
Photodissociation of $H_{2}^{+}$ and $D_{2}^{+}$ : Theory
Physical Review B, 1968
The calculation of self-broadened line widths in linear molecules
Journal of Quantitative Spectroscopy and Radiative Transfer, 1963
The Shape of Spectral Lines: Tables of the Voigt Profile
Australian Journal of Physics, 1959
The continuous absorption spectrum of methyl bromide and its quantal interpretation
Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1937
The continuous absorption spectrum of hydrogen iodide
Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1936
The continuous absorption spectrum of hydrogen bromide
Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1935