Theoretical Studies of X-Ray Photoemission and EXAFS Based on Dyson Orbitals

抄録

High- and low-energy X-ray photoemission is discussed by using Dyson orbitals which are useful to describe the many-body effects. Up to the first-order interaction between the photoelectron and the remaining system is taken into account. Also the formal discussions are given for EXAFS, XANES and resonant photoemission. One of the first-order interaction terms is essential for the discussion of resonant photoemission, and may be important for the discussion of XANES in this theoretical framework.