Multimode saturation resonances in optogalvanic spectroscopy: Application to the determination of lande g-factors in zirconium

Resonances corresponding to the matching of laser mode intervals with Lapmor precessional frequencies have been oberved in the discharge current for four transitions in the spectrum of atomic Zr, introduced into a gas discharge by cathodic sputtering. Signals were observed for lower as well as for upper levels. The measured g-factors for the states 4d²5s(a⁴F)5p ³F_2,3,4 and 4d²5s(a²P)5P ³P₂ are symmetrically higher than values given in the literature.