NORM-ADIABATIC PHOTODISSOCIATION DYNAMICS OF BRCL

Nozzle-cooled BrCl was excited with tunable laser radiation at selecte d wavelengths between 389 and 500 nm. The chlorine atomic fragments in their Cl(P-2(1/2)) and Cl(P-2(3/2)) State were stated-selectively pr obed by resonance-enhanced multiphoton ionization. The branching ratio (Cl/(Cl + Cl*)) was measured as a function of the excitation wavelen gth. The relative Cl yield reaches a maximum at around lambda(phot) = 460 nm. Decomposition of these branching ratios into Cl and Cl photo fragment yield spectra provides insight into the BrCl B-state (II)-I-3 (0(+)) non-adiabatic dissociation dynamics. Our results suggest that t he dissociation mechanism involves non-adiabatic transitions among 0() pial energy curves.