Precision measurements of the infrared Zeeman spectrum of methane with a ring laser
Danileiko M. V. , Kozubovskii V. R., Nedavnii A. P., Shpak M. T.
"Competition1' power resonances of a ring laser were used to measure the Zeeman splitting of the methane 2947.912 cm absorption line of the Fp' component of branch P(7) of group v3 with resolution 3X10"6 cm-'.