Optimization of Cs.sub.2./sub.HfCl.sub.6./sub. synthesis, its crystal growth by vertical Bridgman method and measurements of luminescence and scintillation properties

0501953 - FZÚ 2019 BG eng A2 - Abstrakt ze sborníku
Král, Robert - Zemenová, Petra - Bystřický, Aleš - Vaněček, Vojtěch - Jarý, Vítězslav - Kohoutková, M. - Kodama, S. - Kurosawa, S. - Yokota, Y. - Yoshikawa, A. - Nikl, Martin
Optimization of Cs₂HfCl₆ synthesis, its crystal growth by vertical Bridgman method and measurements of luminescence and scintillation properties.
European Conference on Crystal Growth /6./ ECCG6. Varna: Bulgarian Academy of Sciences, 2018 - (Ranguelov, M.; Michailov, M.; Tsakova, V.). ISSN N.
[European Conference on Crystal Growth. 16.09.2018-20.09.2018, Varna]
Grant CEP: GA ČR GJ18-17555Y
Institucionální podpora: RVO:68378271
Klíčová slova: cesium hafnium chloride * Bridgman method * crystal growth * luminescence * scintillation
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)

This work is focused on the optimization of preparation and purification of starting CsCl and HfCl4 with the goal to prepare high purity and quality Cs2HfCl6 single crystals. However, the direct synthesis of Cs2HfCl6 is complicated due to low sublimation temperature of HfCl4 and its high hygroscopicity. The Cs2HfCl6 single crystals were grown by unseeded vertical Bridgman method in sealed quartz ampules with various ampule designs. Prepared Cs2HfCl6 single crystals were characterized using X-ray fluorescence, X-ray diffraction, and thermal analyses to determine the purity, phase content, and thermal properties. Furthermore, the optical, luminescence, and scintillation measurements on shaped optical elements were performed to analyze the scintillation performance of the Cs2HfCl6 crystals.

Trvalý link: http://hdl.handle.net/11104/0293919