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

Adsorbate structure and angular dependence of desorption dynamics: molecular oxygen photodesorbed from palladium(111).

In: Physical review letters, Jg. 70 (1993) ; Nr. 8, S. 1147-1150
ISSN: 1079-7114
Zeitschriftenaufsatz / Fach: Chemie
The O2 adsorbed on Pd(111) is photodesorbed and photodissociated when irradiated with 5.0 eV light. Polar and azimuthal angle-resolved time-of-flight spectra of directly photodesorbed neutral mols. were measured. Both desorption flux and the translational energy depend on the desorption angle. In particular, a marked max. in the translational energy at a polar angle of 60 Deg with C3v symmetry is found for the superoxo species. This behavior apparently is correlated with the binding geometry of the mols. before desorption.