The total photoelectric cross-section at a given energy, E, is calculated as described in section 11.1.4. Note that for this process the MeanFreePathTable is not built, since the cross-section is not a smooth function of the energy, therefore in all calculations the cross-section is used directly.
The incident photon is absorbed and an electron is emitted in the same direction as the incident photon.
The electron kinetic energy is the difference between the incident photon
energy and the binding energy of the electron before the interaction.
The sub-shell, from which the electron is emitted, is randomly selected
according to the relative cross-sections of all subshells,
determined at the given energy, 
, by interpolating the evaluated
cross-section data from the EPDL97 data bank [1].
The interaction leaves the atom in an excited state. The deexcitation of the atom is simulated as described in section 11.9.
30.09.1999 created by Alessandra Forti
07.02.2000 modified by Véronique Lefébure
08.03.2000 reviewed by Petteri Nieminen and Maria Grazia Pia
13.05.2002 modified by Vladimir Ivanchenko