Abstract

The high-resolution VUV k3Π(v = 2, 3, 5) ← X1Σ+(v = 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 3Π assignment for the upper valence state given by Baker et al. (Chem. Phys.178, 569-579 (1993)). It is also shown that the k3Π2(v = 3) spin-orbit component is responsible for the indirect predissociation at J = 31 in the E1Π(v = 0) state, while the k3π0(v = 5) spin-orbit component is responsible for the indirect predissociation at J = 7 in the E1Π(v = 1) state.

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