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Development of a radiation detector made of a cubic boron nitride polycrystal

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タイトル: Development of a radiation detector made of a cubic boron nitride polycrystal
著者: Kaneko, J.H. 著作を一覧する
Taniguchi, T. 著作を一覧する
Kawamura, S. 著作を一覧する
Satou, K. 著作を一覧する
Fujita, F. 著作を一覧する
Homma, A. 著作を一覧する
Furusaka, M. 著作を一覧する
キーワード: Cubic boron nitride
High-temperature and high-pressure synthesis
Radiation detector
Boron neutron-capture therapy
発行日: 2007年 6月21日
出版者: Elsevier B.V.
誌名: Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment
巻: 576
号: 2-3
開始ページ: 417
終了ページ: 421
出版社 DOI: 10.1016/j.nima.2007.03.016
抄録: Radiation detectors were fabricated using single and polycrystalline cubic boron nitride (cBN) crystals synthesized using a high-pressure and high-temperature (HP/HT) method. Although cBN single crystals obtained using a barium BN solvent system were nearly colorless and displayed high electrical resistance, in contrast to conventional amber-colored crystals, the single crystals exhibit a leakage current that renders them unsuitable for use in a detector. In contrast, a detector made of a cBN polycrystal synthesized by direct transformation had a very low leakage current of 0.2 pA with bias voltage of 100 V; it functioned as a radiation detector. From an experiment using α-particles, holes traversed a longer distance than electrons. It had a fast rise time of approximately 300 ns. The detector also showed sensitivity to neutrons. However, output signals were smaller than the expected voltage from the experiment using α-particles, probably because of charge accumulation from the high-neutron flux.
資料タイプ: article (author version)
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 金子 純一


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