Quasi-projection-operator calculation of autoionization states of Li

Abstract

Calculations of positions of the first three ${}_{}{}^2{}_{}{}^{}S$, ${}_{}{}^2{}_{}{}^{}P$ autoionization states of lithium are reported. The results agree with experimental values (available in four of the six cases) to almost four-place accuracy. A comment is included concerning the current status of quasiprojection optical-potential scattering calculations for non-resonant $e-\mathrm{He}$ phase shifts.