Multielectron Excitations Above the Xenon L Edges

The X-ray absorption cross section ahove 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 thc contrihutions from the effects of shakenp and shakeoff to the photoahsorption 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 arc clcarly identified in the present study and the difference hetween 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.