The hyperfine structure of ¹²⁹I₂ and ₁₂₇I₁₂₉ in the B band system

Abstract

In a double saturation spectroscopy experiment, using the radiation from one single frequency cw laser, the spectra of ¹²⁹I₂ and ¹²⁷I¹²⁹I from one saturation setup were recorded simultaneously and with respect to the spectrum of ¹²⁷I₂ from another setup while tuning the laser. The hyperfine patterns of ¹²⁹I₂ and ¹²⁷I¹²⁹I were analysed to determine the nuclear electric quadrupole interaction and the nuclear spin–rotation interaction parameters. Models are presented describing the observations and giving reliable predictions for the hyperfine parameters of all isotopomers.

Acknowledgements

This study is supported by the European Community, Integrated Infrastructure Initiative action (RII3-CT-2003-506350) and by the Netherlands Foundation for Fundamental Research of Matter (FOM).