Laser excited luminescence of rare earth impurities in natural and synthetic CaF2 |
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| Authors: | M Iliev E Liarokapis M Bl Sendova |
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| Institution: | 1. Faculty of Physics, University of Sofia, 1126, Sofia, Bulgaria
2. Physics Department, National Technical University, 15773, Athens, Greece
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| Abstract: | This work explores the potential of laser excited luminescence for the study of type and concentration of rare-earth (RE) luminescence centres in CaF2. A comparison with X-ray excited luminescence is made. The luminescence spectra of several natural and synthetic samples are obtained at low and room temperatures using different Ar+ and Kr+ laser lines for excitation. Tentative assignment of the luminescent lines to different RE2+ and RE3+ ions is made. The excitation is shown to take place predominantly through the emission of one phonon. The possibilities for concentration measurements of luminescent centres are discussed. |
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