NRDの開発,3; 小型14MeVパルス中性子源に用いる新型モデレータの研究
Development of NRD, 3; Study of a new moderator for compact 14-MeV pulsed neutron sources
高峰 潤; 小泉 光生; 呉田 昌俊; 原田 秀郎 ; 北谷 文人; 土屋 晴文; 瀬谷 道夫; 飯村 秀紀
Takamine, Jun; Koizumi, Mitsuo; Kureta, Masatoshi; Harada, Hideo; Kitatani, Fumito; Tsuchiya, Harufumi; Seya, Michio; Iimura, Hideki
A prototype device of neutron resonance densitometry (NRD) with a D-T neutron generator was planned for basic studies of actual NRD devices. D-T neutron generators had features of simple handling and compact compared with photo neutron sources driven by electron beam accelerators. But those of D-T neutron are higher energy and lower intensity than those of photo neutron. We designed a new type moderator to compensate for the shortcomings. In the new type moderator, the D-T neutron generator is surrounded by Lead, and Polyethylene is arranged in the beam direction on the surface of Lead. As the result of analysis using Monte Carlo code MCNP5, it was found that the new moderator achieved about four times larger production of low energy neutrons than polyethylene moderator without distorting the energy resolution below at least 100 eV. The lead part in the new moderator are changed to other heavy metals, which is Uranium, and Tungsten. Analysis like the above were performed. We report these results.
使用言語 : Japanese
掲載資料名 : 核物質管理学会(INMM)日本支部第35回年次大会論文集(インターネット)
ページ数 : 10 Pages
発行年月 : 2015/01
出版社名 : 核物質管理学会
発表会議名 : 第35回核物質管理学会日本支部年次大会
開催年月 : 2014/11
開催都市 : 六ヶ所
開催国 : 日本
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登録番号 : BB20142737
抄録集掲載番号 : 43000652
論文投稿番号 : 15750
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