Fine Structure in theKX-Ray Absorption Spectrum of Bromine

Abstract

The existence of an extended Kronig type fine structure in the $K$ absorption edge of bromine is established by the double crystal ionization spectrometer method. This fine structure as obtained with partially polarized x-rays and a single crystal absorber is very pronounced and some evidence has been found of a smoothing out and shifting of the structure for orientations of the crystal absorber in which the most probable direction of ejection of electrons is not perpendicular to an important plane in the crystal. There is some indication that the structure is less pronounced for unpolarized x-rays. The results follow from Kronig's theory of extended fine structure and quantitative agreement with the theory is obtained when comparison is made with results obtained (photographically) by others. A value for the side of a unit cube of KBr is given.