104 (ν₂ + ν₄) ← ν₂hot-band transitions, some of which correspond to known(ν₂ + ν₄) ← ν₂CF4laser lines, have been identified and measured in high-resolution Doppler-limited spectra of12CF4near 16 μm, obtained with a tunable diode laser. From an analysis of these frequencies, the rotational and tensor splitting constants for the ν2vibrational level have been determined. These constants, together with theν₂ + ν₄pump-band spectrum previously obtained, allow the laser emission frequencies for any given CO2pump line to be calculated with an accuracy of 0.01-0.003 cm-1.
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Patterson et al. (1980) studied this question.
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