The Complete Active Space SCF (CASSCF) and contracted CI methods have been used together with a medium sized Gaussian type basis set (67 basis functions) to calculate potential curves and a dipole moment function for the BeH ground state. The vibrational Schrödinger equation was solved numerically and averaged dipole moments, spectroscopic constants and transition probabilities were calculated. The spectroscopic constants for the best potential curves produced with highly correlated CI wavefunctions including core-valence correlation were in excellent agreement with experimental data. Converged results with respect to choice of orbital space were obtained for the dipole moments. No experimental results are available for comparison.
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