LASER PHOTOLYSIS OF PULSE-DESORBED DIMETHYLCADMIUM MOLECULES

Dimethylcadmium molecules were desorbed by a CO2 laser from layers dep osited onto a quartz surface at 120 K. The dissociation and ionization of the desorbed molecules induced by a high-intensity KrF laser were studied by mass spectrometric technique. The photolysis of dimethyl ca dmium yielding Cd and CH3 was found to be a single-photon process. The photolysis intermediate, CdCH3, is stabilized by collisions. The proc esses of resonance three-photon generation of Cd+ and CH3+ ions and fo rmation of the molecular ions upon collisions of molecules with Cd+ io ns were observed.