福井大学附属国際原子力工学研究所Reserch Institute of Nuclear Engineering, University of Fukui
本研究では，より信頼性の高いポリエチレンの熱中性子散乱断面積データを提示することを目的に，ポリエチレンの分子動力学シミュレーションモデルを新たに用意し，非干渉性散乱近似及びガウス近似に基づいた熱中性子散乱断面積データの評価を行った。その結果，得られた熱中性子散乱断面積データは測定値と良い一致を示し，JENDL-5等に収録された評価よりも優れた信頼性を示すものであった。
This study aims to present more reliable thermal neutron scattering cross-section data for polyethylene. To achieve this, a new molecular dynamics simulation model for polyethylene is developed, and thermal neutron scattering cross-section data are evaluated based on the incoherent and Gauss approximations. As a result, the evaluated thermal neutron scattering cross-section data show good agreement with measurement values and are superior to the evaluation stored in JENDL-5 etc. from the viewpoint of reliability.
Key words: Thermal neutron cross-section data; Polyethylene; KUNSCA; JENDL-5
© Japan Radioisotope Association 2026. This is an open access article distributed under the Creative Commons Attribution 4.0 International (CC BY 4.0) License (https://creativecommons.org/licenses/by/4.0/)© Japan Radioisotope Association 2026. This is an open access article distributed under the Creative Commons Attribution 4.0 International (CC BY 4.0) License (https://creativecommons.org/licenses/by/4.0/)
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