Comment on “Photoionization of endohedral atoms usingR-matrix methods: Application to Xe@C60”

Abstract

We demonstrate that what is called a total photoionization cross section in the work by T. W. Gorczyca, M. F. Hasoglu, and S. T. Manson [Phys. Rev. A 86, 033204 (2012)] is in fact a partial photoionization cross section. These quantities differ impressively even in isolated atoms. This demonstrates the prominent role of inelastic collisions of a photoelectron from an intermediate or inner shell not mentioned in their paper. We discuss briefly the correspondence between the experimental data, theoretical predictions, and $R$-matrix results from Phys. Rev. A 86, 033204 (2012). We call attention to the danger in using parameters of C${}_{60}$ potential selected by fitting the same experimental data that one wants to describe. We show that our criticism is applicable to the theoretical part of the most recent publication on photoionization of $\mathrm{Xe}@{\mathrm{C}}_{60}^{+}$ [R. A. Phaneuf et al., Phys. Rev. A 88, 053402 (2013)].