VARIATIONAL CALCULATIONS OF THE ROVIBRATIONAL ENERGY-LEVELS OF K2NA+

Ab initio variational calculations of the low-lying rovibrational stat es of K2Na+ were performed, A sixth order power series expansion using an exponential Dunham variable was embedded in the Eckart-Watson Hami ltonian, which was solved variationally, The anharmonic fundamental fr equencies for the breathe, bend and asymmetric stretch vibrations were calculated to be 188.2 (A(1)), 78.2 (A(1)) and 94.9 (B-2) cm(-1) resp ectively, The low-lying rovibrational states were calculated using a 5 60 configuration basis involving products of the vibrational eigenfunc tions and plus and minus combinations of regular symmetric-top rotor f unctions.