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KMID : 0364920120370020070
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Journal of Radiation Protection and Research
2012 Volume.37 No. 2 p.70 ~ p.74
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CHARACTERISTICS OF FABRICATED SiC RADIATION DETECTORS FOR FAST NEUTRON DETECTION
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Lee Cheol-Ho
Kim Han-Soo
Ha Jang-Ho
Park Se-Hwan
Park Hyeon-Seo
Kim Gi-Dong
Park June-Sic
Kim Yong-Kyun
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Abstract
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Silicon carbide (SiC) is a promising material for neutron detection at harsh environments because of its capability to withstand strong radiation fields and high temperatures. Two PIN-type SiC semiconductor neutron detectors, which can be used for nuclear power plant (NPP) applications, such as in-core reactor neutron flux monitoring and measurement, were designed and fabricated. As a preliminary test, MCNPX simulations were performed to estimate reaction probabilities with respect to neutron energies. In the experiment, I-V curves were measured to confirm the diode characteristic of the detectors, and pulse height spectra were measured for neutron responses by using a 252Cf neutron source at KRISS (Korea Research Institute of Standards and Science), and a Tandem accelerator at KIGAM (Korea Institute of Geoscience and Mineral Resources). The neutron counts of the detector were linearly increased as the incident neutron flux got larger.
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KEYWORD
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MCNPX, Silicon carbide (SiC), Neutron detector, Fast neutron, Response spectrum, Linearity
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