The 248-nm photofragmentation of the peroxymethyl radical.
The products of the photodissocn. of CH3O2 in the 248-nm (KrF) excimer laser photolysis were investigated by both emission spectroscopy and laser-induced fluorescence (LIF). Among the products OH(A2S+), OH(X2P), and CH3O(~X2E) were identified with fractional yields of the latter 2 of j(OH) = 0.06 +- 0.03 and j(CH3O) = 0.2 +- 0.1. Formation of OH(A2S+) is suggested as a diabatic process involving an excited state of CH2OOH. The obsd. emission is sufficiently strong to utilize the 248-nm photodissocn. of CH3O2 as a monitor of this species in kinetic expts.
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