Abstract
The state-selective photoelectron imaging technique is applied to investigate the angular distribution of ejected electrons and the electronic state of the atomic ion produced by (2+1) resonance-enhanced multiphoton ionization of iodine atom in the photolysis of CH 3I. Strong anisotropic distribution behaviors have been depicted on two electron images observed, one via the two-photon resonance 2 D 5 2 0 state from ground state iodine and, another via 4 D 5 2 0 from spin-orbit excited iodine. The configuration of core electrons is preserved in the ionization from the 2 D 5 2 0 intermediate state, while the ionization from the 4 D 1 2 0 state shows two distinct ionization paths, a preserved and a non-preserved path of core electrons.
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