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Development of a radiation detector made of a cubic boron nitride polycrystal
| Title: | Development of a radiation detector made of a cubic boron nitride polycrystal |
| Authors: | Kaneko, J.H. Browse this author →KAKEN DB | | Taniguchi, T. Browse this author | | Kawamura, S. Browse this author | | Satou, K. Browse this author | | Fujita, F. Browse this author | | Homma, A. Browse this author | | Furusaka, M. Browse this author |
| Keywords: | Cubic boron nitride | | High-temperature and high-pressure synthesis | | Radiation detector | | α-Particles | | Neutrons | | Boron neutron-capture therapy |
| Issue Date: | 21-Jun-2007 |
| Publisher: | Elsevier B.V. |
| Journal Title: | Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment |
| Volume: | 576 |
| Issue: | 2-3 |
| Start Page: | 417 |
| End Page: | 421 |
| Publisher DOI: | 10.1016/j.nima.2007.03.016 |
| Abstract: | 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. |
| Relation: | http://www.sciencedirect.com/science/journal/01689002 |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/28005 |
| 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: 金子 純一
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