2009 年 30 巻 1 号 p. 34-39
We review some new developments in theory of photoemission from solids. In particular, multi-atom resonant photoemission (MARPE) and recoil processes in high-energy photoemission are discussed in detail. In the former and latter phenomena, radiation field screening and phonon excitation around an X-ray absorbing atom, respectively, play an important role.