The Zeeman effect for the arc spectrum of rhodium has been photographed with a large Bitter type magnet at field intensities up to 94,000 gauss. Data are given on the Zeeman patterns of 446 lines, from which <i>g</i> values are calculated for nearly all the known low and middle spectral terms of the rhodium atom. For terms arising from the low even configuration, the <i>g</i> values are found to be given by <i>LS</i> coupling formulas, except for the terms having <i>J</i> = 2 ½ or 1 ½, in which case a perturbation between the overlapping <i>d</i><sup>9</sup>. and <i>d</i><sup>8</sup>.5<i>s</i> configurations destroys the agreement. The <i>g</i> sum rule is found to be valid when the terms from the two configurations are taken together. For the odd configurations the <i>g</i> values lie between those predicted by <i>LS</i> and <i>Jj</i> coupling formulas. The classification of lines by other investigators has been thoroughly checked, and a new term list is given with 14 additional terms. The old term values have been recalculated on the basis of new wave-length data.
JULIUS P. MOLNAR and WILLIAM J. HITCHCOCK, "The Zeeman Effect in the Rhodium Arc Spectrum at High Fields," J. Opt. Soc. Am. 30, 523-535 (1940)