Hyperfine Zeeman effects in Pr3+:LaCl3using the fluorescence line-narrowing technique

Abstract
New fluorescence line-narrowing experiments carried out on the 6011 AA line of Pr3+ in LaCl3 show evidence of a temperature-dependent process of relaxation between hyperfine states of the excited level 1D2A1. Frequency distribution of the additional lines due to this relaxation leads to a determination of the second-order Zeeman hyperfine interaction. A detailed discussion of the small spectroscopic effects arising ( approximately=10-3 cm-1) on the levels under study is also presented.
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