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Energy storage in Ce-doped LiCaAlF6 and LiSrAlF6 crystals |
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| Authors: | N Shiran A Gektin S Neicheva V Voronova V Kornienko K Shimamura N Ichinose |
| Institution: | a Institute for Scintillation Materials, 60 Lenin Ave, Kharkov 61001, Ukraine b Kagami Memorial Laboratory of Mat. Sci. and Techn., Waseda University, 2-8-26 Nishiwaseda, Shinijuku, Tokyo 169-0051, Japan |
| Abstract: | Absorption, emission and thermoluminescence (TL) of as-grown and X-irradiated pure and Ce-doped LiCaAlF6 (LiCAF) and LiSrAlF6 (LiSAF) crystals have been analyzed. It is shown that the energy storage is defined by the dissimilarity of basic matrix properties, intrinsic defect structure, preferred Ce3+ ion disposition and charge compensation defect type. This is the reason of higher colorability and TL efficiency of as-grown Ce:LiSAF compared to Ce:LiCAF. Pre-filling of ultra-deep traps leads to enormous increases in the TL response. Due to these properties Ce:LiSAF and Ce:LiCAF are promising thermoluminescent dosimetric materials. |
| Keywords: | Ce:LiCaAlF6 Ce:LiSrAlF6 Colorability Dosimeter |
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