The Theory of the Fine Structure of X-Ray Absorption Limits in Polyatomic Molecules

The theory of the fine structure of x-ray absorption limits in polyatomic molecules is developed in a form which takes molecular configuration into account, and it is found that the Petersen formula represents a limiting case. The fine structure of the $K$-absorption limit is calculated for several molecular models, in particular that of Ge in Ge${\mathrm{Cl}}_4$, for which comparison is made with the previous calculation of Hartree, Kronig, and Petersen, and the newer experimental results obtained by Shaw.