Radiation-Stimulated Transformations Yb3+->Yb2+ and Yb3+->Yb3+ in Single Crystals and Nanoceramics CaF2 : YbF3
Ashurov M. Kh.1, Nuritdinov I.2, Boyboboeva S. T.2,3
1Fonon Research and Production Association, Tashkent, 700054 Uzbekistan
2Institute of Nuclear Physics, Academy of Sciences of Uzbekistan, Ulugbek, Tashkent, 100214 Uzbekistan
3Tashkent Regional Chirchik State Pedagogical Institute, st. Amir Temur, 104, Chirchik, 111700, Uzbekistan
Email: ashurov49@mail.ru, izzatilloh@yahoo.com, sohibaboyboboeva@gmail.com

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The radiation resistance of CaF2 : YbF3 (3 mol.% YbF3) laser ceramics and a single crystal of similar composition (3.6 mol.% YbF3) exposed to gamma rays in a 60Co source is studied. The non-irradiated samples have been shown to be similar in spectral characteristics. After the CaF2 : YbF3 crystals and ceramics γ-irradiation and the following time exposure, along with transformations Yb3+->Yb2+, configurational Yb3+->Yb3+ transitions between different states of Yb3+ ions in the structure of samples are carried out, with the participation of interstitial Fi ions. Keywords: radiation resistance, laser ceramics, gamma rays, spectral characteristics defects.
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