On the modification of the photoionization of subvalent subshells in   endohedral noble gas atoms
  It is demonstrated that outer and inner electron shells, including that formed by collectivized electrons of the fullerene C60, affects dramatically the cross section of the subvalent ns-subshells of the noble gas endohedral atoms A@C60. The calculations are performed within the framework of a very simple, so-called "orange skin", model that makes it possible, in spite of its simplicity, to take into account the modification of the ns-subshell due to its interaction with inner and outer atomic shells, as well as with the collectivized electrons of the C60. As a concrete example, we consider the Xe 5s electrons completely collectivized by the powerful action of the Xe close and remote multi-electron neighboring shells. 
M. Ya. Amusia (The Hebrew University, Jerusalem, Israel), A. S.   Baltenkov (Arifov Institute of Electronics, Tashkent, Uzbe...