Photoionization of atoms stuffed inside a two-shell fullerene

Abstract

The photoionization of a two-shell endohedral A@CN1@CN2 is considered. Formulas are presented for cross-sections and angular anisotropy parameters, both dipole and non-dipole. The effect of the fullerenes shell upon photoelectron from atom A is taken into account substituting the action of the fullerene by two zero-thickness "bubble potential". The fullerenes shells polarization is included assuming that the radius of the outer shell R2 is much bigger than the inner R1 and both much exceeds the atomic radius r. This permits to express the effect via CN1,N2 polarizabilities, which are connected to their photoionization cross-sections. The interaction between shells CN1 and CN2 is taken into account in the Random Phase Approximation (RPA). The effect of photoelectron scattering by both "bubble potentials" is included in the lowest order and in the RPA frame. As concrete examples, two endohedrals Ar@C60@C240 and Xe@C60@C240 are considered. In the first case we consider 3p and 3s, while in the second 5p, 5s and 4d subshells. A whole variety of new peculiarities are found that deserve experimental verification.

References in corpus (3)

• On the possibility to consider fullerene shell C60 as a conducting sphere
• Giant resonances of endohedral atoms
• Photoionization of Xe 3d electrons in molecule Xe@C60: interplay of intra-doublet and confinement resonances

Cited by in corpus (5)

• Confinement and correlation effects in the Xe@C60 generalized oscillator strengths
• Time Delay in Electron-C60 Elastic Scattering in a Dirac Bubble Potential Model
• Photoionization of multishell fullerenes studied by ab initio and model approaches
• Simple and Onion-type Fullerenes shells as resonators and amplifiers
• On possible multiple occurrences of the breakdown of the dipole and dipole-quadrupole approximations in angle-differential spectra of fullerene anions, C${}_n^{-}$