Two-dimensional imaging of photofragments and species desorbed from surfaces: Energy and angle resolved studies

A two-dimensional imaging method involving resonance-enhanced multiphoton ionization to study the energy and the angular distributions of photofragments and photodesorbed species is described. Preliminary results obtained for NO adsorbed on Pt(lll) and NO2adsorbed on Al2O3(1120) with the technique are presented. The latter system has also been investigated by time-of-flight mass spectrometric analysis with excimer lasers. The results are discussed. © 1991, American Vacuum Society. All rights reserved.