A new method for determining absorption cross sections out of initially excited vibrational states.
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.
Golan
Amir
A
Department of Physics, Ben-Gurion University, Beer Sheva 84105, Israel.
Mayorkas
Nitzan
N
Rosenwaks
Salman
S
Bar
Ilana
I