Polasik, M . Słabkowska, K. Kozioł, K. Starosta, J. Dousse, Jean-Claude Hoszowska, Joanna Rzadkiewicz, J. 2011 The present work provides a reliable interpretation of the <i>K^hα₁/<i>K^hα₂</nobr> intensity ratios and an explanation of the lifetime values for <i>K-shell hollow atoms based on an advanced theoretical analysis (using extensive multiconfiguration Dirac–Fock calculations with the inclusion of the transverse Breit interaction and quantum electrodynamics corrections). It was found that, as a result of closing the <i>K^hα₁</nobr> de-excitation channel in the pure LS coupling scheme, the <i>K^hα₁/<i>K^hα₂</nobr> intensity ratio changes with the atomic number from small values (for the LS coupling limit at low <i>Z) to about 1.5– 1.6 (for the <i>j–<i>j coupling limit at high <i>Z). However, closing the <i>K^hα₁</nobr> de-excitation channel (due to the domination of the pure LS coupling for the low-<i>Z atoms) does not enlarge the lifetimes of hollow atoms. application/pdf https://folia.unifr.ch/global/documents/305062 https://folia.unifr.ch/documents/305062/files/dou_ldk.pdf eng info:eu-repo/semantics/altIdentifier/doi/10.1088/0031-8949/2011/T144/014021 info:eu-repo/semantics/openAccess License undefined Physica Scripta. - 2011, vol. 2011, no. T144, p. 014021 info:eu-repo/classification/udc/53 Lifetimes of doubly K -shell ionized states http://purl.org/coar/resource_type/c_6501