Phase diagram of BaI.sub.2./sub.-LuI.sub.3./sub. system and growth of BaI.sub.2./sub./LuI.sub.3./sub. eutectic scintillator

0539424 - FZÚ 2021 RIV NL eng J - Journal Article
Origuchi, K. - Yokota, Y. - Král, Robert - Yoshino, M. - Yamaji, A. - Toyoda, S. - Sato, H. - Ohashi, Y. - Kurosawa, S. - Kamada, K. - Yoshikawa, A.
Phase diagram of BaI₂-LuI₃ system and growth of BaI₂/LuI₃ eutectic scintillator.
Journal of Crystal Growth. Roč. 536, Apr (2020), s. 1-5, č. článku 125573. ISSN 0022-0248. E-ISSN 1873-5002
Institutional support: RVO:68378271
Keywords : phase diagrams * eutectics * scintillators
OECD category: Materials engineering
Impact factor: 1.797, year: 2020
Method of publishing: Limited access
https://doi.org/10.1016/j.jcrysgro.2020.125573

The phase diagram of the BaI2-LuI3 system was created using powder X-ray diffraction (XRD) and differential scanning calorimetry (DSC) analyses. Eutectic scintillating crystal of eutectic composition was grown by the vertical Bridgman method. The results of XRD patterns and DSC curves showed that the phase diagram of the BaI2-LuI3 system had a eutectic point around 77.5 mol% BaI2/22.5 mol% LuI3. No new compound was generated from BaI2 and LuI3 mixture. The 77.5 mol% BaI2/22.5 mol% LuI3 eutectic crystal was composed of BaI2 as rod phase and LuI3 as matrix phase. In addition, the Ce-doped 77.5 mol% BaI2/22.5 mol% LuI3 specimen showed emission peaks originating from 5d–4f transition of Ce3+ ion in the X-ray radioluminescence spectrum and the decay time under γ-ray irradiation was approximately 38 ns.
Permanent Link: http://hdl.handle.net/11104/0317177