Ion – Surface Scattering Processes in the Presence of Electromagnetic Field: The Concept of Temporal Effective Density of States

Abstract

 The interaction dynamics in the scattering process between surface and species were studied earlier using the one-electron Hamiltonian in the presence of a (monochromatic) electromagnetic field. This work defines a new concept, "the temporal effective density of states". This quantity is essential in obtaining the ion neutralization probability in the ion-surface scattering and is equivalent to the time average of the transient energy-dependent current through the system. Our applications ensure that this kind of the tunneling current can be controlled by the electromagnetic field parameters such as its frequency and its strength. Then, adiabatic and non-adiabatic electron tunneling regimes are investigated and discussed for the process. Also, in the limit of very low ion velocity one can find, an equivalent behavior for the temporal effective density of states.