Article révisé par les pairs
Résumé : The paper presents a variation procedure developed by the authors that allows results to be obtained with great accuracy for the energy characteristics of the electron system in the heliumoid electron-nuclear systems with nuclei of isotopes from the line of stability for Z from 2 to 118. Dependencies are identified, based on the results from the method and by using staggering analysis between the energy characteristics of the ground state and the properties of the nuclei of the isotopes involved in the system.