The Zeeman spectra of atomic iodine in the presence of a magnetic field ranging from 0 to 400 G has been directly observed with a high-resolution 1.3-μm diode laser tuned across the I(<sup>2</sup>P<sub>1/2</sub>)→I(<sup>2</sup>P<sub>3/2</sub>) hyperfine transitions in a heated I<sub>2</sub> cell. Experimental results for both σ(ΔM<sub>F</sub>=0) and π(ΔM<sub>F</sub>=±1) transitions are presented and compared with a theoretical model with good agreement. A Gaussian fit to zero-field spectral lines gives a measure of gas temperature and peak absorption in agreement with calculated values based on experimental conditions.
© 2000 Optical Society of America
(020.2930) Atomic and molecular physics : Hyperfine structure
(020.7490) Atomic and molecular physics : Zeeman effect
(300.6210) Spectroscopy : Spectroscopy, atomic
(300.6260) Spectroscopy : Spectroscopy, diode lasers
R. F. Tate, B. T. Anderson, P. B. Keating, and G. D. Hager, "Diode-laser Zeeman spectroscopy of atomic iodine," J. Opt. Soc. Am. B 17, 1271-1278 (2000)