Photoionisation of atomic bromine

Abstract
The experimental relative photoionisation cross section of atomic bromine from ionisation threshold to approximately 900 AA is presented. Two autoionising Rydberg series are identified converging to 3P1, two to 3P0, three to 1D2 and two to 1S0. The spectrum bears a strong resemblance to that of atomic chlorine, including the additional sharp series converging to 1D2 unaccounted for in ab initio calculations. Complexities emerge in the 3P region, prefiguring the complex structure in atomic iodine.