MODEL POTENTIAL CALCULATIONS FOR THE EXCITED AND RYDBERG STATES OF THE NA-2(- POTENTIAL CURVES, DIPOLE AND QUADRUPOLE TRANSITION MOMENTS() MOLECULAR ION )

Molecular potential curves for many excited states of the Na-2 molecul e are presently available for a wide range of internuclear distances, in the framework of a two-electron model potential method. The energie s were obtained through an extensive configuration interaction procedu re using Na-2(+) orbitals, and the quality of the results was controll ed by the accuracy of the wavefunctions of the molecular ion. In this work, computed potential energy curves and transition moments are pres ented for the ground, excited and Rydberg Sigma, Pi and Delta states o f Na-2(+) up to the Na(7i)+Na+ dissociation limit. The accuracy of the first excited states is checked by comparing with available experimen tal data. Figures are presented for the molecular quantum defects as a function of internuclear distance, showing an interesting pattern of pseudo-crossings.