R. J. Buss

Photodissociation of formaldehyde in a molecular beam

Formaldehyde photopredissociation was studied under collisionless conditions by the technique of crossed laser and molecular beams. Detection of the molecular product CO after excitation of H2CO near the S1 origin gives strong support to the sequential coupling model for fast nonradiative decay of S1 states through broadened S0 levels to the continuum. For H2CO excitation at 283.9 nm, formation of the radical product HCO dominates dissociation to molecular products by at least one order of magnitude.

Multiproperty empirical interatomic potentials for ArXe and KrXe

Crossed molecular beam measurements of elastic differential cross sections (DCS) for the scattering of Ar and Kr by Xe are reported. Empirical multiparameter M3SV interatomic potentials for the ArXe and KrXe interactions are determined by simultaneously fitting the DCS, the viscosities, and virial coefficients; the results are the most accurate potentials yet reported for these systems.

A crossed molecular beam study of the O(1D2)+CH4 reaction

A cross molecular beam experiment was performed to study the O(1D2)+CH4 reaction. The results show that hydrogen atom elimination reaction greatly exceeds molecular hydrogen elimination. (AIP)