LASER PHOTOLYSIS OF IODINE MOLECULES ON A SURFACE

The interaction of resonant 532-nm laser radiation with iodine molecul ar-crystal films and iodine-saturated porous glasses was studied by th e techniques of laser-induced luminescence and time-of-flight mass spe ctrometry. Surface photodissociation of iodine molecules was experimen tally observed; the process is a nonthermal type and most likely occur s via both direct and predissociation pathways. Irradiation of porous glasses with iodine by replicate 532-nm laser shots at q = 10(11) W/m2 and a fluence Q = 3.84 x 10(7) J/m2 induced secondary chemical reacti ons on the pore surface with the participation of atomic and molecular iodine, resulting in characteristic changes in luminescence spectra.