Elastic electron scattering from A@Cn(A = Ca, Mg, n = 60, 20)

Abstract

We report on elastic electron scattering cross sections from Ca and Mg confined by C60 and C20 using the optical potential method. We demonstrate the diffuse effect caused by a fullerene cage upon the elastic electron scattering process by employing a commonly used square-well potential and the recently ab initio calculated continuousness electrostatic potential. For Ca@C60, we found that the differential cross sections calculated by the continuousness electrostatic potential model are compatible with the square-well potential model while the square-well potential model tends to overestimate the integrated cross section than the continuousness electrostatic potential model. Results of electron collision from Mg@C20 have shown big discrepancies exist in both of the differential and integrated cross sections between two potentials, which implies that a new ab initio calculated electrostatic potential model should be preferred in future works. Moreover, the elastic scattering cross sections from Ca of the Ca±z@ have been calculated for the first time.