A new method for determining absorption cross sections out of initially excited vibrational states.

Autor: Golan, Amir, Mayorkas, Nitzan, Rosenwaks, Salman, Bar, Ilana
Předmět:
Zdroj: Journal of Chemical Physics; 2/7/2009, Vol. 130 Issue 5, pN.PAG, 4p, 1 Diagram, 1 Chart, 1 Graph
Abstrakt: A first experimental demonstration, combining the methods of vibrationally mediated photodissociation (VMP) and ionization-loss stimulated Raman spectroscopy (ILSRS) for measuring cross sections for dissociation of vibrationally excited levels is reported. The action spectrum obtained in the VMP of methylamine exhibits enhancement of the H photofragment yield as a result of initial vibrational excitation and the ILSRS monitors the fraction of molecules being excited. The partial cross sections for H production out of the sampled vibrational states and the extent of mode selectivity were thus determined. [ABSTRACT FROM AUTHOR]
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