Abstract

199 Zeeman patterns are presented for Gd i, from which g-values are calculated for 118 levels. A discussion is given of the terms and electron configurations to which previously unassigned even levels may belong; new assignments are given for 15 even levels belonging to four terms (7P, 9F, 9D, 7D) of the configuration 4f7(S8312)5d6s6p. Russell’s prediction that the next even configuration, 4f7(S8312)5d26p, begins at ~25 000 cm−1 is confirmed. The observed g-values in general lie within ±5% of the LS coupling values, but marked deviations occur for some levels, indicating that energy-level mixing is present.

© 1967 Optical Society of America

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