Hirayama, Hiroyuki; de Meijere, Arne; Hasselbrink, Eckart:

The influence of lateral interactions on the angular distribution in photodesorption.

In: Surface Science (Surf Sci), Jg. 287-288 (1993) ; Pt. A, S. 160-164
ISSN: 0039-6028
Zeitschriftenaufsatz / Fach: Chemie
Photodesorption and photodissocn. are induced when O2 adsorbed on Pd (111) is irradiated with UV light. Both processes are nonthermal. Thermal desorption of mol. O is obsd. as a consequence of a displacement process by the nascent at. O. Angle-resolved time-of-flight spectra were recorded. For the adsorbed mol. superoxo species, these measurements show a pronounced translational energy max. at a desorption angle of 60 Deg. Also, this peak is only obsd. at certain azimuthal angles indicating C3v symmetry.