Inclusion of the recoil shift in Doppler-broadened measurements of CO2 transition frequencies

Abstract We report an important correction to recently reported 12C16O2 transition frequencies and derived spectroscopic constants. A total of 44 previously reported frequencies corresponding to transitions in the (30012 ← 00001) and (30013 ← 00001) band with uncertainties as low as 200 Hz are modified by including the effect of photon-absorption-induced recoil shifts. This shifting mechanism decreases all the transition frequencies by approximately 1.7 kHz.