Multielectron Excitations Above the Xenon L Edges

The X-ray absorption cross section above the L edges in Xenon gas has been measured using synchrotron radiation. Multielectron excitation effects are investigated over a few hundred eV region from the Xe-LI, LII, and LIII edges and the contributions from the effects of shakeup and shakeoff to the photoabsorption spectrum are elucidated. Several features for the multielectron excitations were detected and analyzed by the theoretical energy of the shake up process. Previous observations of the [2(s,p)5(s,p)] and [2(s,p)4d] transitions have been confirmed. [2(s,p)4p], [2s4s], and [2s3d] transitions are clearly identified in the present study and the difference between the LI and LII, LIII edges for the change in slope of the absorption curve in passing through the three identified two-electron excitations is investigated