Photoelectron spectroscopy of atomic iodine produced by laser photodissociation

Iodine atoms have been produced by laser-induced dissociation of molecular iodine and photoionized in the $4d$ shell with synchrotron radiation. The photoelectron spectrum originating from the ${4d}^9{5s}^2{5p}^5$ configuration shows a broad multiplet structure. We have also performed ab initio calculations of the spectrum in an intermediate coupling scheme. The energy spread as well as branching ratios are found to be in excellent agreement with experimental results.