PHOTODISSOCIATION OF DIMETHYL-SULFOXIDE AT 193 NM IN THE GAS-PHASE

The photodissociation dynamic's of the reaction (CH3)2SO + hv(193 nm) --> 2CH3 + SO have been examined by laser spectroscopic techniques. Re lative vibrational and rotational state energy distributions of the na scent SO photofragment have been determined by using laser induced flu orescence spectroscopy on the (B2SIGMA--X3SIGMA-) transition. The same technique has also been employed to establish the quantum yield, PHI1 93[SO(X3SIGMA)] = 1.02 +/- 0.12. The nascent vibrational state distrib utions in the v1 and v2 modes of the methyl radical have been determin ed by using 2 + 1 resonance enhanced multiphoton ionization spectrosco py via the (3p2A2'' <-- 2p2A2'') transition.