Growth and luminescence properties of Eu-doped HfO2/α-Al2O3 eutectic scintillator

Kei Kamada; Kosuke Hishinuma; Shunsuke Kurosawa; Akihiro Yamaji; Yasuhiro Shoji; Jan Pejchal; Yuji Ohashi; Yuui Yokota; Akira Yoshikawa

doi:10.1016/S1002-0721(16)60096-0

Growth and luminescence properties of Eu-doped HfO₂/α-Al₂O₃ eutectic scintillator

Kei Kamada, Kosuke Hishinuma, Shunsuke Kurosawa, Akihiro Yamaji, Yasuhiro Shoji, Jan Pejchal, Yuji Ohashi, Yuui Yokota, Akira Yoshikawa

Research output: Contribution to journal › Article › peer-review

12 Citations (Scopus)

Abstract

HfO₂/α-Al₂O₃ eutectics were grown by the micro-pulling down (μ-PD) method at the composition of 63.2 mol.% α-Al₂O₃, 35.512 mol.% HfO₂, 0.92 mol.% Eu₂O₃ and 0.368 mol.% Y₂O₃. Rod phases with around 3–4 μm diameter were observed on the transverse cross-section. The phase-separated scintillator fibers (PSSFs) structure with fibers of around 3–4 μm diameter and 10–20 μm length was observed. The electron back scattering patterns indicated crystal orientation of [101] for monoclinic HfO₂ rod phase and [0001] for α-Al₂O₃ matrix in the transverse cross-section. Eu³⁺ 4f-4f emission was observed at 550–750 nm.

Original language	English
Pages (from-to)	796-801
Number of pages	6
Journal	Journal of Rare Earths
Volume	34
Issue number	8
DOIs	https://doi.org/10.1016/S1002-0721(16)60096-0
Publication status	Published - 2016 Aug 1

Keywords

eutectic
micro-pulling down method
rare earths
scintillator

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10.1016/S1002-0721(16)60096-0

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title = "Growth and luminescence properties of Eu-doped HfO2/α-Al2O3 eutectic scintillator",

abstract = "HfO2/α-Al2O3 eutectics were grown by the micro-pulling down (μ-PD) method at the composition of 63.2 mol.% α-Al2O3, 35.512 mol.% HfO2, 0.92 mol.% Eu2O3 and 0.368 mol.% Y2O3. Rod phases with around 3–4 μm diameter were observed on the transverse cross-section. The phase-separated scintillator fibers (PSSFs) structure with fibers of around 3–4 μm diameter and 10–20 μm length was observed. The electron back scattering patterns indicated crystal orientation of [101] for monoclinic HfO2 rod phase and [0001] for α-Al2O3 matrix in the transverse cross-section. Eu3+ 4f-4f emission was observed at 550–750 nm.",

keywords = "eutectic, micro-pulling down method, rare earths, scintillator",

author = "Kei Kamada and Kosuke Hishinuma and Shunsuke Kurosawa and Akihiro Yamaji and Yasuhiro Shoji and Jan Pejchal and Yuji Ohashi and Yuui Yokota and Akira Yoshikawa",

note = "Funding Information: Foundation item: Project supported by the Funding Program for Next Generation World-Leading Researchers, JSPS, Development of Systems and Technology for Advanced Measurement and Analysis, Japan Science and Technology Agency (JST), Adaptable & Seamless Tech-nology Transfer Program through Target-driven R&D (A-STEP), JST, Japan Society for the Promotion of Science (JSPS) Grant-in-Aid for Exploratory Research, JSPS Research Fellowships for Young Scientists, the Health Labour Sciences Research Grant, the Ministry of Health Labour and Welfare and Czech MEYS KONTAKT Cz-jp Collaboration LH14266 Project, Crystal Clear Collaboration in CERN, and EC Marie Curie Initial Training Network LUMINET (316906) Publisher Copyright: {\textcopyright} 2016 The Chinese Society of Rare Earths",

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doi = "10.1016/S1002-0721(16)60096-0",

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T1 - Growth and luminescence properties of Eu-doped HfO2/α-Al2O3 eutectic scintillator

AU - Kamada, Kei

AU - Hishinuma, Kosuke

AU - Kurosawa, Shunsuke

AU - Yamaji, Akihiro

AU - Shoji, Yasuhiro

AU - Pejchal, Jan

AU - Ohashi, Yuji

AU - Yokota, Yuui

AU - Yoshikawa, Akira

N1 - Funding Information: Foundation item: Project supported by the Funding Program for Next Generation World-Leading Researchers, JSPS, Development of Systems and Technology for Advanced Measurement and Analysis, Japan Science and Technology Agency (JST), Adaptable & Seamless Tech-nology Transfer Program through Target-driven R&D (A-STEP), JST, Japan Society for the Promotion of Science (JSPS) Grant-in-Aid for Exploratory Research, JSPS Research Fellowships for Young Scientists, the Health Labour Sciences Research Grant, the Ministry of Health Labour and Welfare and Czech MEYS KONTAKT Cz-jp Collaboration LH14266 Project, Crystal Clear Collaboration in CERN, and EC Marie Curie Initial Training Network LUMINET (316906) Publisher Copyright: © 2016 The Chinese Society of Rare Earths

PY - 2016/8/1

Y1 - 2016/8/1

N2 - HfO2/α-Al2O3 eutectics were grown by the micro-pulling down (μ-PD) method at the composition of 63.2 mol.% α-Al2O3, 35.512 mol.% HfO2, 0.92 mol.% Eu2O3 and 0.368 mol.% Y2O3. Rod phases with around 3–4 μm diameter were observed on the transverse cross-section. The phase-separated scintillator fibers (PSSFs) structure with fibers of around 3–4 μm diameter and 10–20 μm length was observed. The electron back scattering patterns indicated crystal orientation of [101] for monoclinic HfO2 rod phase and [0001] for α-Al2O3 matrix in the transverse cross-section. Eu3+ 4f-4f emission was observed at 550–750 nm.

AB - HfO2/α-Al2O3 eutectics were grown by the micro-pulling down (μ-PD) method at the composition of 63.2 mol.% α-Al2O3, 35.512 mol.% HfO2, 0.92 mol.% Eu2O3 and 0.368 mol.% Y2O3. Rod phases with around 3–4 μm diameter were observed on the transverse cross-section. The phase-separated scintillator fibers (PSSFs) structure with fibers of around 3–4 μm diameter and 10–20 μm length was observed. The electron back scattering patterns indicated crystal orientation of [101] for monoclinic HfO2 rod phase and [0001] for α-Al2O3 matrix in the transverse cross-section. Eu3+ 4f-4f emission was observed at 550–750 nm.

KW - eutectic

KW - micro-pulling down method

KW - rare earths

KW - scintillator

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Growth and luminescence properties of Eu-doped HfO₂/α-Al₂O₃ eutectic scintillator

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