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ファイル | 記述 | サイズ | フォーマット | |
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j.nimb.2021.12.008.pdf | 1.78 MB | Adobe PDF | 見る/開く |
タイトル: | Effect of neutron–photon converter materials (Cd, Gd, and Sm) on the positron production in a reactor-based slow positron beamline |
著者: | Yabuuchi, Atsushi https://orcid.org/0000-0003-4659-9429 (unconfirmed) |
著者名の別形: | 籔内, 敦 |
キーワード: | Reactor-based slow positron beamline Neutron capture gamma-ray Pair production Monte Carlo simulation |
発行日: | Feb-2022 |
出版者: | Elsevier BV |
誌名: | Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms |
巻: | 513 |
開始ページ: | 44 |
終了ページ: | 49 |
抄録: | The change in the amount of positron production when Cd cap, installed as a neutron–photon converter, is replaced with Gd or Sm caps was simulated by Monte Carlo calculations in the slow positron beamline at the Kyoto University Research Reactor, especially focusing on the change in the amount of positron production induced by neutrons emitted from a reactor core. Based on the simulation results, the amount of positron production induced by neutrons obtained using Gd and Sm caps was estimated to decrease to (69±4) % and (54±3)%, respectively, compared with the amount obtained using Cd cap. Meanwhile, Cd and Gd caps with a thickness of 1 mm were evaluated to have almost the same burn-up lifetime. Therefore, a Cd cap is the best choice, while a Gd cap, which has a higher melting point, could be an alternative if the structure of the positron source makes effective cooling difficult. |
著作権等: | © 2022. This manuscript version is made available under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International license. The full-text file will be made open to the public on 15 February 2024 in accordance with publisher's 'Terms and Conditions for Self-Archiving'. This is not the published version. Please cite only the published version. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。 |
URI: | http://hdl.handle.net/2433/267538 |
DOI(出版社版): | 10.1016/j.nimb.2021.12.008 |
出現コレクション: | 学術雑誌掲載論文等 |
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