A test of the I2 ground state molecular constants deduced from Fourier absorption spectroscopy : the Wood's resonance series

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Abstract
Fourier absorption spectroscopy studies of the iodine molecule in the near infrared region between 11600-12 600 cm-1 enabled us to detect five (0, v") bands with 15 ≤ v" ≤ 19. Thus, an homogeneous set of molecular constants, based only on Fourier absorption measurements, describing the twenty first low lying vibrational level of the ground state X 1Σ +0g, are now available. Only partial agreement was found between a priori calculated wavenumbers of the Wood's green line resonance series (B-X system) based on the new set of molecular constants and earlier experimental values deduced from Fabry-Perot interferometric measurements. In particular the Fabry-Perot experimental values of the first members of Wood's series must be corrected; this conclusion is also confirmed by an independent measurement of the pump line of Wood's series, R33(25, 0), located inside the complex profile of the mercury green line