量研学術機関リポジトリ「QST-Repository」は、国立研究開発法人 量子科学技術研究開発機構に所属する職員等が生み出した学術成果（学会誌発表論文、学会発表、研究開発報告書、特許等）を集積しインターネット上で広く公開するサービスです。 Welcome to QST-Repository where we accumulates and discloses the academic research results(Journal Publications, Conference presentation, Research and Development Report, Patent, etc.) of the members of National Institutes for Quantum Science and Technology.
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A plan of an advanced fusion neutron source (A-FNS) by using d-Li reaction is being developed at Rokkasho-site of National Institutes for Quantum and Radiological Science and Technology (QST). Although a main objective of the A-FNS facility is the fusion material irradiation, application researches using fusion neutrons are being investigated. We calculate production yields of 99Mo, which is its parent nuclide of 99mTc and is important in medical diagnosis, as one of the applications in order to evaluate potential abilities of the A-FNS. A modified IFMIF test cell design for the A-FNS is used for the calculation of the production of 99Mo by using McDeLicious-11 code, FENDL-3.1b and FENDL/A-3.0 nuclear data libraries. At a surface position of high flux test module, we estimate 83 TBq activity of 99Mo which is obtained from 100Mo(n,2n)99Mo reaction in a 2-day irradiation for a 100%-enriched 100Mo sample of 250 g. This amount covers almost all of the demand in Japan per week. Usage of a natural molybdenum sample is also a promising candidate as an inexpensive 99Mo production method, because 98Mo(n,g)99Mo reaction has large capture cross sections in the resonance energy region.
先進核融合中性子源（A-FNS）計画における99Mo/99mTc製造の概念検討
