The Band Spectrum of CO⁺. II. Comet-Tail System (A²II-X²Σ).

Three comet-tail bands (A -X2 ) of C0+ in the red and near infrared are photographed in the first and second orders of a 21-foot grating spectrograph. Their fine-structure analysis is given in Table 1. All the available data concerning these comet-tail bands are examined in the light of the results obtained in a previous investigation for the ground state of C0+. The rotational constants B for the state can be represented by the relation B = 1.58940 - 0.09142(r + ). Arguments are advanced for revising the vibrational numbering of these bands by a lowering of the V' values by three units.