DIABATIC ANALYSIS OF THE ELECTRONIC STATES OF HYDROGEN-CHLORIDE

An effective Hamiltonian method was used to deperturb the (X (2)Pi(i)) 4p sigma and (X (2)Pi(i))4p pi Rydberg states and the V(1)Sigma(+) val ence state of HCl and DCl. A least-squares fit of the eigenvalues of t he Hamiltonian to the experimental term energies was performed, and th e zero-order diabatic characters of the basis states were determined. These deperturbed states were used to fit the observed h-doublings, to predict the energies of unknown states, to model spectroscopic intens ity anomalies, and to explain the spin-orbit branching ratio for predi ssociation. (C) 1998 American Institute of Physics. [S0021-9606(98)009 39-8].