Ionization and excitation of bound electrons on atomic shells based on the Wave-Packet-Model dielectric function

Toshiaki Kaneko

This paper reports the electronic excitation and related energy transfer by swift (~MeV/u) heavy ions on the
basis of the Wave-Packet Model (WPM) in the extended version, by introducing the binding energy separation
into energy transfer. This method makes it possible to estimate both the ionization component of the electronic
stopping cross section and the ionization cross section (ICS) of an atom in the dielectric formalism under ion-impact
and electron-impact. Applying the present theory to a superconducting material EuBa2Cu3O7 (EBCO),
it was found that the track diameter has a linear correlation with the primary ionization density more clearly
than with the electronic stopping. This correlation is well described by a proposed model. The present analysis
showed that the WPM method has a useful advantage to investigate the irradiation effect under swift heavy-ion
impact.

Nuclear Instruments and Methods in Physics Research B 

Elsevier

548

165256-01

165256-10

https://doi.org/10.1016/j.nimb.2024.165256