Structure of the X-Ray K Absorption Limits of Bromine, Iodine, and Some of Their Compounds

The double crystal spectrometer has been used to investigate the structure, width, and relative positions of the K absorption limits of bromine in the vapor, liquid, and solid states; of iodine in the vapor and solid states; and of some compounds of these elements. Curves of these absorption limits are presented. Tables are given of the widths of these limits, of the relative displacements of the limits in compounds, and of the positions of secondary structure. The absorption limit of bromine vapor possesses a pronounced structure near the short wave-length side. This structure does not appear in the absorption limit of either the liquid or solid, or of any of the compounds investigated, except iodine monobromide vapor. The absorption limit of solid iodine shows a faint structure near the short wave-length side. A similar structure is found in the absorption limit of the vapor, but no shift is detected. The iodine K absorption limits of the compounds investigated show no measurable shifts.