K X-Ray Absorption Spectra of Some Compounds of Bromine, Rubidium and Strontium

The K x-ray absorption spectrum of Br in solid AgBr and in each of the vapors CH₃Br, C₂{H}₅$Br and ${Br}₂$ is obtained with a double crystal ionization spectrometer. Edge widths and the positions of secondary fine structure are given and discussed. The small widths given were checked by narrow $K$ edges obtained for Rb in RbBr and Sr in Sr${Cl}₂$ and are shown to be in agreement with data on emission line widths. The effect of chemical combination on the wave-length position of the main edge is discussed.