The European Physical Journal D

, Volume 47, Issue 2, pp 171–179

Improved potentials and Born-Oppenheimer corrections by new measurements of transitions of 129I2 and 127I 129I  in the B3 $\Pi_{\rm O^+_u}$ - X1 $\Sigma^+_{\rm g}$ band system


  • E. J. Salumbides
    • Laser Centre Vrije Universiteit
  • K. S.E. Eikema
    • Laser Centre Vrije Universiteit
  • W. Ubachs
    • Laser Centre Vrije Universiteit
  • U. Hollenstein
    • Laboratorium für Physikalische Chemie
    • Institut für Quantenoptik, Leibniz Universität Hannover
  • E. Tiemann
    • Institut für Quantenoptik, Leibniz Universität Hannover
Molecular Physics and Chemical Physics

DOI: 10.1140/epjd/e2008-00045-y

Cite this article as:
Salumbides, E., Eikema, K., Ubachs, W. et al. Eur. Phys. J. D (2008) 47: 171. doi:10.1140/epjd/e2008-00045-y


The light from one single frequency cw laser was employed in a double saturation spectroscopy experiment to record high resolution spectra of 129I2 and 127I129I together with spectra of 127I2 which is used as a simultaneous frequency reference. Two separate saturation spectroscopy set ups were used. The frequencies of lines of 129I2 and 127I129I were determined with respect to lines of 127I2. More than 380 frequency differences between lines of 127I2 and of the other isotopomers have been included in the data set. By a direct potential fit a precise description of the potential energy curves of the B and the X state and of effective Born-Oppenheimer correction functions valid for all three isotopomers of I2 are given.


33.15.Pw Fine and hyperfine structure33.20.-t Molecular spectra33.20.Kf Visible spectra

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© EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2008