Valence calculations of actinide anion binding energies: All bound7pand7sattachments

Abstract

Relativistic configuration-interaction calculations have been performed for anion binding energies of the entire actinide row using a corelike treatment of the $5f$ subshell: the same occupancy and universal $jls$ restrictions are applied to the subshell throughout the basis of each neutral and anion calculation. We predict bound $7p$ attachments to all actinide ground state configurations except Fm, Md, and No. Additional anion bound states are formed by $7p$ attachment to excited thresholds in Pa and Lr as well as $7s$ attachments relative to excited open-$s$ thresholds in Th, Pa, U, and Np. Of the 41 bound actinide anion states presented, over half are characterized here for the first time. The most unusual case is ${\text{Pa}}^{\ensuremath{-}}$, where these ab initio calculations predict five bound anion states arising from four different configurations.