THE KAPPA-PI(3)-VALENCE STATE OF CO

The high-resolution VUV k3PI(upsilon = 2, 3, 5) <-- X1SIGMA+(upsilon = 0) ''forbidden'' absorption bands of CO have been observed and rotationally analyzed in the wavenumber range 90 000-98 000 cm-1, confirming the recent 3PI assignment for the upper valence state given by Baker et aL (Chem. Phys. 178, 569-579 (1993)). It is also shown that the k3PI2(upsilon = 3) spin-orbit component is responsible for the indirect predissociation at J = 31 in the E1PI(upsilon = 0) state, while the k3PI0(upsilon = 5) spin-orbit component is responsible for the indirect predissociation at J = 7 in the E1PI(upsilon = 1) state. (C) 1994 Academic Press, Inc.