Энергия связи основного состояния бериллиеподобного молибдена: корреляционные и квантово-электродинамические эффекты

Abstract

High-precision calculations of the ground-state binding energy of berylliumlike molybdenum ($Z=42$) are performed. The applied approach merges rigorous quantum-electrodynamics (QED) treatment up to the second order of perturbation theory in the framework of the Furry picture and the third- and higher-order correlation effects evaluated within the Breit approximation. The mixing of the close configurations of the same symmetry due to the electron--electron interaction is considered by employing the QED perturbation theory for quasi-degenerate levels. The most accurate up-to-date theoretical predictions for the binding energy are obtained.