On the Emission Bands of CF2

Abstract

A new band system attributed to a non-linear C${\mathrm{F}}_2$ molecule has been obtained by exciting the flowing vapor of carbon tetrafluoride. The symmetric stretching frequencies and the bending frequencies in the lower and upper states have been determined. From a study of the sub-band heads ($K$-structure), it is shown that the band system is of the parallel type, that is, the electric moment associated with the transition vibrates parallel to the line joining the fluorine atoms. The band system is identified with the transition ${}_{}{}^1{}_{}{}^{}B_2^{}{}_{}{}^{}\to {}_{}{}^1{}_{}{}^{}A_1^{}{}_{}{}^{}$.