Absolute iodine (I2) standards measured by means of Fourier transform spectroscopy

The internal standard method has been used to calibrate the absorption spectrum of the iodine molecule recorded in the visible by means of Fourier spectroscopy. The result is that the wavenumbers previously published in the iodine-atlas extending from 14 800 to 20 000 cm-1 must be corrected by substracting 0.005 6 cm -1 from all wavenumbers. The accuracy of the absolute wavenumbers obtained in this way is estimated ± 0.002 cm-1.