We are fully aware that the mainstream trend is to study heavy atoms. But some fundamental processes have not until now been investigated fully and analytically and it is our very humble belief that such a fundamental work must be presented to the international scientific community. We are not in a position to compare with these works since they are devoted to heavy atoms.
Again in earlier publications [Physics Reports 315 (1999) 409 and related references], there are existing experiments of triple differential cross sections for relativistic K-shell ionization of Ag, Au, and so on. The authors did not mention these experimental works in the manuscript. It would be nice if the RPWBA method in the manuscript can be compared with the experiments.