Competitive channels in the jet-cooled photodissociation of the CH2Cl radical

The photodissociation of CH2Cl is studied by the ion imaging technique. At 235-243 nm, Cl photofragments are produced via the simultaneous excitation of the perpendicular (1(2)A(t) <-- 1(2)B(1)) and parallel (2(2)B(1) <-- 1(2 )B(1)) electronic transitions. The relative populations and translational e nergy distributions of Cl fragments generated via each transition are extra cted. H-atom products, which are detected in a one-color experiment at 243. 1 nm, exhibit an angular distribution characteristic of perpendicular trans itions only, They may be produced via excitation to the valence 1(2)A(1) an d/or Rydberg 2(2)A(1)(3s) states. (C) 2001 Elsevier Science B.V. All rights reserved.