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UV photo-dissociation of methyl-bromide and methyl-bromide cation studied by velocity map imaging.

MPG-Autoren
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Wodtke,  A. M.
Department of Dynamics at Surfaces, MPI for biophysical chemistry, Max Planck Society;

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Zitation

Blanchet, V., Samartzis, P., & Wodtke, A. M. (2009). UV photo-dissociation of methyl-bromide and methyl-bromide cation studied by velocity map imaging. Journal of Chemical Physics, 130(3): 034304. doi:10.1063/1.3058730.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-002C-AABA-D
Zusammenfassung
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.