The stability of Mge+ and NaPs

The existence of stable ground states for the exotic species Mge(+) and NaPs was demonstrated by using a modified version of the stochastic variational method to solve the Schrodinger equation for a model potential. The model potential consisted of the direct interaction between the positron and electrons with a Hartree-Fock wavefunction for the 10-electron core. The exchange potential between the valence electrons and the core electrons is approximated by using a local potential. It is found that Mge(+) is stable against decay into e(+) + Mg with a binding energy of 0.012 790 Hartree and NaPs is stable with a binding energy of 0.005 892 Hartree.