I^∗ production from n-alkyl iodides at 222 nm

Abstract

The dynamics of I^∗(²P_½) production in a series of n-alkyl iodides at 222 run have been investigated. Data are analyzed using a simple classical impulsive model. At this excitation wavelength, 1 (²P_3/2) originates from a curve-crossing between the ³Q₀ and ¹Q₁ surfaces and the probability of crossing for all the iodides has been derived. Since the I quantum yield is found to decrease, the probability of crossing increases as a function of the alkyl radical size, which is also consistent with the classical model.