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dc.creatorWang, P. G.en_US
dc.description$^{1}$ P.G. Wang, and I. D. Ziegler. J. Chem Phys. 90 (8) 1115 (1989)en_US
dc.descriptionAuthor Institution: Department of Chemistry, Nortbeastern Universityen_US
dc.description.abstractThe Spontaneous rovibrational resonance Raman scattering of methyl module is examined using excitation wavelengths resonnat with the predissociative, electronically degenrate B-state absorption band(201 - 190 nm). The observed intensity wavelength dependence and depolarization ratio dispersion ae analysed with an irreducible two phonon tensor approach to determine the mode-dependence of B-state subpicossecond lifetimes. The $CH_{3}I$ photodissociation is found to be same for the B state origin $\nu_{3}$, $\nu_{6}$ and $\nu_{2}$ levels but increnses by nearly an order of magnitude when one quantium of is initially excited on the quass-bound surface. A smilar trend is observed for $CD_{3}I$. Lifetimes upon deuteration incrase be a factor of 2, except for $\nu_{1}$ which increases be a factor of 10. Photodissociation rate are also observed to be K independent. Contrary to chemical intuition, only excitation of $\nu_{1}$ (totally symmetric stretch) increases the photodissociation rate, suggesting that th emost favorable reaction pathway to methyl iodide dissoiation following excitation to the B-state surface involves a small barrir along the C-H stretch coordinate.en_US
dc.format.extent45523 bytes
dc.publisherOhio State Universityen_US
dc.titleDynamics of Methyl Iodide B State Photodissocintion Product with Resonance Raman Scatteringen_US

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