Photoelectron imaging of atomic chlorine and bromine following photolysis of CH2BrCl

摘要

Photoionization of chlorine and bromine atoms following photodissociation of CH2BrCl was studied in the wavelength range of 231-238 nm by photoelectron imaging technique. Final state-specific speed and angular distributions of the photoelectron were recorded. Analysis of relative branching ratios to different levels of Cl+ and Br+ revealed that the final ion level distributions are generally dominated by the preservation of the ion-core configuration of the intermediate resonant state. Some J(c) numbers of the intermediate states were newly assigned according to this regulation. The configuration interaction between resonant states and the autoionization in the continuum were also believed to play an important role in the ionization process since some ions that deviate from the regulation mentioned ahead were observed. The angular distributions of the electrons were found to be well characterized by beta(2) and beta(4), although the ionization process of chlorine and bromine atoms involves three photons.