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Free keywords:
Photodissociation, Excited states, Angular distribution, Dissociation, Excitation energies
Abstract:
We employ the velocity map imaging technique to measure kinetic energy and angular distributions of state selected CH3 (v2=0,1,2,3) and Br (P23/2, P21/2) photofragments produced by methyl bromide photolysis at 215.9 nm. These results show unambiguously that the Br and Br∗ forming channels result in different vibrational excitations of the umbrella mode of the methyl fragment. Low energy structured features appear on the images, which arise from CH3Br+photodissociation near 330 nm. The excess energy of the probe laser photon is channeled into CH3+ vibrational excitation, most probably in the ν4 degenerate bend.
