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Using the Multi-Configuration Dirac-Fock (MCDF) method we calculate with 9 configuration state functions the correlation energy as well as the total energy of the lowest J = 0 ground state of all two-electron systems from H- to Thorium (Z = 90). A comparison with experimental data, which are available only in the low Z region, shows a very good agreement.
@article{urn:nbn:de:hebis:34-2008091023620, author ={Fricke, Burkhard and Rashid, Khalid}, title ={On the total energy of two-electron atoms}, copyright ={https://rightsstatements.org/page/InC/1.0/}, language ={en}, year ={1985} }