The pulsed laser desorption of monoatomic, Al, H-2, and H2O was studied at 266 nm with the time-of-flight (TOF) method at laser fluences between 63.3 and 90.2 mi cm(-2). TOF data were analyzed with shifted Maxwell-Boltzmann distributions taking collisions of desorbed species into account. Kinetic energy at TOF peak (KE(p)) of ionic Al species increased, while that of neutral Al species decreased as the laser fluence increased. However, their center of mass velocities were constant. These results clearly indicate that collisions occur between desorbed species. KE(p) values of ionic and neutral Al species were similar (similar to 8 eV) when they were extrapolated to zero fluence. Such a high KE value cannot be explained by a temperature rise due to a pulsed laser shot but was explained by two-photon excitation process followed by surface relaxation, which will be dissipated either by an exciton formation or by the minimum energy necessary to form ionized Al species, ionization energy E(i) minus work function phi. A new method to estimate work function of materials is proposed. From XPS results and thermodynamic considerations, it is concluded that laser-desorbed Al species are from zeolite framework, and not from agglomerated Al species. It was confirmed that H and H2O are pulsed laser desorbed from OH species present in H-Y zeolites. The formation of H2O was depended on the concentration of OH species. A model was proposed to interpret laser desorption of monoatomic Al and H from H-Y zeolite.