Delay of Photoelectrons Emitted from the Ionized Ne 2s and 2p Shells Including Photoelectron Scattering

Formulas to calculate the atomic photoionization delay have been derived taking into account the interaction between the channels and the scattering of a photoelectron. The photoionization delay difference between Ne 2p and 2s shells has been calculated for photon energies up to 200 eV. The calculated delay difference at a photon energy of 105 eV is 18.5 as, which is approximately 8 as larger than delay differences previously calculated taking into account only the interactions between the channels and is in agreement within the experimental error with two existing experimental values.