Key points are not available for this paper at this time.
The complete hyperfine structure of the P (117) line of the 21-1 band of the B transition of ^127I₂ is observed at 568. 2 nm. A resolution in excess of 10^8 is obtained by a sensitive technique of saturation spectroscopy using a krypton-ion laser. The spectrum can be fitted by a model which includes both a nuclear electric quadrupole and a magnetic hyperfine interaction.
Hänsch et al. (Mon,) studied this question.