Ground-state energy and relativistic corrections for positronium hydride

摘要: Variational calculations of the ground state positronium hydride (HPs) are reported, including various expectation values, electron-positron annihilation rates, and leading relativistic corrections to total dissociation energies. The have been performed using a basis set 4000 thoroughly optimized explicitly correlated Gaussian functions. relative accuracy variational energy upper bound is estimated be order 2x10{sup -10}, which significant improvement over previous nonrelativistic results.