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Preparation and scintillation properties of translucent LiCaBO3:Ce polycrystalline plates
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| Title: | Preparation and scintillation properties of translucent LiCaBO3:Ce polycrystalline plates |
| Authors: | Toyoda, Saki Browse this author | | Higuchi, Mikio Browse this author →KAKEN DB | | Tsubota, Youichi Browse this author | | Kaneko, Junichi H. Browse this author | | Tadanaga, Kiyoharu Browse this author |
| Keywords: | Neutron scintillator | | Translucent polycrystalline thin plate | | Liquid phase sintering | | Grain growth | | Borate |
| Issue Date: | Aug-2017 |
| Publisher: | Elsevier |
| Journal Title: | Optical Materials |
| Volume: | 70 |
| Start Page: | 180 |
| End Page: | 183 |
| Publisher DOI: | 10.1016/j.optmat.2017.05.023 |
| Abstract: | Translucent LiCaBO3:Ce thin plates were prepared by liquid phase sintering using LiBO2 as a sintering aid, and their fluorescent and scintillation properties were investigated to examine the possibility to use as neutron scintillator. Since the initial part of the directionally solidified specimen contained a second phase of Ca3B2O6, LiCaBO3 may melt incongruently, and simple melt growth of LiCaBO3:Ce is consequently difficult. Translucent thin plates 300 mu m in thickness were successfully fabricated from LiCaBO3:Ce sintered compacts. Although strong fluorescence with the peak wavelength of 390 nm was observed in photoluminescence measurement, scintillation light yield and detection efficiency by alpha-particle irradiation were rather poor. The diffuse reflectance spectrum of LiCaBO3:Ce revealed existence of an absorption band other than Ce3+ bands in the ultraviolet region. The band may corresponds to defect levels, which interrupt the energy transfer from the conduction band of the host to the 5d level of Ce3+ resulting in the degradation of the scintillation performance. (C) 2017 Elsevier B.V. All rights reserved. |
| Rights: | © 2017. This manuscript version is made available under theCC-BY-NC-ND 4.0 licensehttp://creativecommons.org/licenses/by-nc-nd/4.0/ | | http://creativecommons.org/licenses/by-nc-nd/4.0/ |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/75070 |
| Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 樋口 幹雄
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