QED phenomena in highly ionised atoms

Abstract

In the case of multiply-charged ions when energy levels with the same values of the total angular momentum J, its projection Jz and parity P may overlap, the SD difficulties are shown to manifest themselves in QED calculations of the respective spectral line profiles (SLPs). In this case we have used the regaularisation method of cut momentum L. A logarifrnic L-dependence seems to be contained in the obtained formaulas of NB and SLP. On the example of hydrogen-like uranium U+91 the SLPs have been calculated which spectra are deformed. It have been studied a dependence of SLPs from cut off momentum L, state [i> and mutual distance ΔE ji.