HIGH-RESOLUTION WAVE-NUMBER STANDARDS FOR THE INFRARED

The calibration of high resolution infrared spectra is generally more precise than accurate. This is the case even when they are recorded wi th Fourier transform interferometers. The present document aims at imp roving the accuracy of wavenumber measurements in the infrared by reco mmending a selection of spectral lines as wavenumber standards for abs olute calibration in the range from about 4 to about 7000 cm(-1) The u ncertainties of these wavenumber standards range from +/-1 x 10(-3) to +/-1 x 10(-6) cm(-1). Sources of frequency standards, on which the wa venumber determinations are based, are also given.