QED corrections to the binding energy of the ekaradon (Z=118) negative ion
Abstract
Quantum electrodynamic (QED) electron selfenergy and vacuum polarization corrections to the binding energy of the 8s electron in the ekaradon (Z=118) negative ion are calculated. This ion was found recently to be stable in the DiracCoulombBreit 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.
 Publication:

Physical Review A
 Pub Date:
 February 2003
 DOI:
 10.1103/PhysRevA.67.020102
 Bibcode:
 2003PhRvA..67b0102G
 Keywords:

 12.20.Ds;
 31.30.Jv;
 31.25.Eb;
 Specific calculations;
 Relativistic and quantum electrodynamic effects in atoms and molecules;
 Electron correlation calculations for atoms and ions: ground state