Quantum electrodynamic (QED) electron self-energy and vacuum polarization corrections to the binding energy of the 8s electron in the eka-radon (Z=118) negative ion are calculated. This ion was found recently to be stable in the Dirac-Coulomb-Breit Hamiltonian; an improved basis and correlating all 119 electrons give a binding energy of -0.064(2) eV. The QED contribution is 0.0059(5) eV, amounting to a 9% reduction of the binding energy. This is the largest relative QED effect reported for neutral or weakly ionized atoms, and confirms the importance of QED corrections for superheavy elements.
Physical Review A
- Pub Date:
- February 2003
- Specific calculations;
- Relativistic and quantum electrodynamic effects in atoms and molecules;
- Electron correlation calculations for atoms and ions: ground state