TY - JOUR
T1 - Crystal growth and scintillation properties of selected fluoride crystals for VUV scintillators
AU - Pejchal, Jan
AU - Fukuda, Kentaro
AU - Yamaji, Akihiro
AU - Yokota, Yuui
AU - Kurosawa, Shunsuke
AU - Kral, Robert
AU - Nikl, Martin
AU - Yoshikawa, Akira
N1 - Funding Information:
This work was partially supported by the funding program for the next generation world-leading researchers, JSPS , together with Development of Systems and Technology for Advanced Measurement and Analysis, Japan Science and Technology Agency (JST) and Adaptable & Seamless Technology Transfer Program through Target-driven R&D (A-STEP), JST . Partial support of the project of Japan-Czech collaboration ( MEYS, KONTAKT II , LH12150 ) is also gratefully acknowledged.
Publisher Copyright:
© 2014 Elsevier B.V.
PY - 2014/9/1
Y1 - 2014/9/1
N2 - Single crystals of orthorhombic and monoclinic BaLu2F8doped with Nd and Tm were grown by micro-pulling-down method. The monoclinic (low temperature modification) was grown using LiF flux, while the orthorhombic (high temperature modification) was grown with special hot-zone with shallow gradient and employing quenching process. Reasonable scintillation efficiency was achieved for the crystals of the former modification, while no rare-earth ion emission was observed in the latter due to preferential energy transfer to defects. The orthorhombic (low temperature) modification of ErF3was grown using LiF flux and hot zone with steep gradient. Quite low scintillation efficiency was found for the Nd-doped sample due to energy migration over the Er3+levels. Possibility of using pure ErF3as an infra-red scintillator is discussed.
AB - Single crystals of orthorhombic and monoclinic BaLu2F8doped with Nd and Tm were grown by micro-pulling-down method. The monoclinic (low temperature modification) was grown using LiF flux, while the orthorhombic (high temperature modification) was grown with special hot-zone with shallow gradient and employing quenching process. Reasonable scintillation efficiency was achieved for the crystals of the former modification, while no rare-earth ion emission was observed in the latter due to preferential energy transfer to defects. The orthorhombic (low temperature) modification of ErF3was grown using LiF flux and hot zone with steep gradient. Quite low scintillation efficiency was found for the Nd-doped sample due to energy migration over the Er3+levels. Possibility of using pure ErF3as an infra-red scintillator is discussed.
KW - A1. Infra-red emission
KW - A1. Vacuum-ultra-violet emission
KW - A2. Micro-pulling-down method
KW - B1. Barium-lutetium fluoride
KW - B1. Erbium fluoride
KW - B2. Scintillator materials
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U2 - 10.1016/j.jcrysgro.2013.12.040
DO - 10.1016/j.jcrysgro.2013.12.040
M3 - Article
AN - SCOPUS:84906963061
VL - 401
SP - 833
EP - 838
JO - Journal of Crystal Growth
JF - Journal of Crystal Growth
SN - 0022-0248
ER -