Sa. Buntin et al., PHOTODECOMPOSITION DYNAMICS OF MO(CO)6 SI(111)7X7 - CO INTERNAL STATEAND TRANSLATIONAL ENERGY-DISTRIBUTIONS/, The Journal of chemical physics, 98(9), 1993, pp. 7651-7654
The rotational state and translational energy distributions of CO phot
odesorption products resulting from the 266 nm photolysis Of Mo (CO)6
adsorbed on Si(111) 7 X 7 with coverages in the multilayer regime are
reported. State-resolved measurements show two desorption components w
ith highly disparate energy dispositions. Results for different surfac
e temperatures indicate that the energy content in one component reach
es quasi-equilibration with the surface temperature, which is attribut
ed to collisional relaxation of nascent photodecomposition products wi
thin the adlayer. The other component exhibits disparate rotational an
d translational ''temperatures'' that are significantly greater than,
and independent of, the surface temperature. These nascent photodecomp
osition products are influenced by both energy quenching effects and d
ynamical constraints imposed by the existence of the adlayer.