Engineering of Eu dopant segregation in colquiriite-type fluoride single crystal scintillators

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Abstract

Colquiriite-type Eu-doped LiCaAlF6 and LiSrAlF6 (Eu:LiCAF and Eu:LiSAF) scintillator single crystals were grown using Al metal as a starting material to improve the Eu dopant segregation. All Eu:LiCAF and Eu:LiSAF single crystals using Al metal (Eu,AlM:LiCAF and Eu,AlM:LiSAF) indicated high transparency and effective segregation coefficients (keff) of Eu2%,AlM1%:LiCAF and Eu2%,AlM1%:LiSAF single crystals were significantly improved to the value of 0.40 and 0.99, respectively. EuF3 starting material reacted with Al metal before colquiriite-type phase was generated. As a result, Eu3+ ion in EuF3 was changed to Eu2+ ion which could be incorporated into Ca2+ and Sr2+ sites easily.

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Yokota, Y., Yamaji, A., Kurosawa, S., Ohashi, Y., Kamada, K., & Yoshikawa, A. (2017). Engineering of Eu dopant segregation in colquiriite-type fluoride single crystal scintillators. AIP Advances, 7(12). https://doi.org/10.1063/1.5006996

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