  Calculation of the cross-section for the process of double electron capture
by bare nucleus with emission of a single photon is presented. The double
electron capture is evaluated within the framework of Quantum Electrodynamics
(QED). Line-Profile Approach (LPA) is employed. Since the radiative double
electron capture is governed by the electron correlation, corrections to the
interelectron interaction were calculated with high accuracy, partly to all
orders of the perturbation theory.
