Hyperfine patterns of infrared absorption lines of Ho3+ C4v centres in CaF2 |
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| Authors: | Jon-Paul R Wells Glynn D Jones Michael F Reid Marina N Popova Elena P Chukalina |
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| Institution: | 1. Department of Physics and Astronomy , University of Sheffield , Sheffield S3 7RH , United Kingdom;2. Department of Physics and Astronomy , University of Canterbury , PB4800 , Christchurch 8020 , New Zealand;3. Department of Physics and Astronomy and MacDiarmid Institute for Advanced Materials and Nanotechnology , University of Canterbury , PB4800 , Christchurch 8020 , New Zealand;4. Institute of Spectroscopy, Russian Academy of Sciences , 142190 Troitsk , Moscow Region , Russia |
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| Abstract: | Hyperfine structure is observed on several infrared transitions to the 5I7 and 5I6 multiplets of the Ho3+ C4v centre in CaF2. Particularly complex and detailed hyperfine structures are observed for transitions to the Y3 level of the 5I7 multiplet, which include the appearance of ΔIz ≠ 0 transitions. The hyperfine lines of this level are satisfactorily accounted for by strong mixing of close-lying levels of this multiplet by the perpendicular hyperfine interaction, which leads to relaxation of the ΔIz = 0 selection rule and a redistribution of the hyperfine intensities over many transitions. An excellent correspondence is found between the measured and simulated spectra. |
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