Photoionization of 3d electrons of Xe, Cs and Ba endohedral atoms: comparative analyses

TL;DR

This paper investigates the photoionization of 3d electrons in Xe, Cs, and Ba endohedral atoms, revealing how the fullerene shell influences resonance features and cross-sections, with distinctive differences among the atoms.

Contribution

It provides a comparative analysis of photoionization resonances in Xe, Cs, and Ba endohedral atoms, incorporating the effects of the C60 shell using the orange skin potential model.

Findings

Reflection by the fullerene shell significantly alters photoionization cross-sections.

Distinctive differences are observed among Xe, Cs, and Ba endohedral atoms.

Resonance features are unaffected by C60 polarization in the studied photon energy range.

Abstract

We demonstrate rather interesting manifestations of co-existence of resonance features in characteristics of the photoionization of 3d-electrons in Xe, Cs and Ba endohedral atoms. It is shown that for all of the considered atoms the reflection by the fullerene shell of photoelectrons produced by the 3d subshell photoionization affects greatly partial photoionization cross-sections of 3d5/2 and 3d3/2 levels and respective angular anisotropy parameters, both dipole and non-dipole adding to all of them additional maximums and minimums. The results obtained demonstrate distinctive differences between the three atoms. The calculations are performed treating the 3/2 and 5/2 electrons as electrons of different kinds with their spins "up" and "down". The effect of C60 shell is accounted for in the frame of the "orange" skin potential model. It is essential that in the considered photon frequency region presented resonance features are not affected by the C60 polarization.