Lambda-doubling in the C1Πu state of H2 Academic Article uri icon


  • The Λ-doubling of the H2 C1Πu state rovibronic energy levels by interaction with the B1Σu+ state is calculated. The present calculation seeks to improve on the similar work of Julienne (1) in three respects (1) The pure precession approximation is not made. (2) Stwalley's B-state potential curve (8) is used and the B- and C-state zero-order eigenvalues are more accurately positioned. (3) The effect of the B-state vibrational continuum is included. The Λ-doubling values agree with experiment to within 1.0 cm-1 for J = 1, 2, and 3, and to within 1.5 cm-1 for J = 4 and 5. It is shown that the Λ-doubling coupling matrix elements provide a sensitive test of electronic potential energy curves. In particular, the inaccuracy of the left limb of the B-state RKR curve is demonstrated. © 1994.

published proceedings

  • Journal of Molecular Spectroscopy

author list (cited authors)

  • Ford, A. L.

citation count

  • 16

complete list of authors

  • Ford, A Lewis

publication date

  • December 1974