Ab initio properties and potential energy surface of the ground electronic state of BeHe2+

The stability of the ground state of BeHe2+ has been investigated using the UCCSD(T) and IC-MRCI methods, in conjunction with augmented quadruple-zeta core-valence correlation basis sets. An analytical potential energy surface of the ground state of BeHe2+ was also constructed using a discrete grid of IC-MRCI energies.