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Research and development for accuracy improvement of neutron nuclear data on minor actinides

Harada, Hideo ; Iwamoto, Osamu; Iwamoto, Nobuyuki ; Kimura, Atsushi; Terada, Kazushi; Nakao, Taro; Nakamura, Shoji; Mizuyama, Kazuhito; Igashira, Masayuki*; Katabuchi, Tatsuya*; Sano, Tadafumi*; Shibahara, Yuji*; Takahashi, Yoshiyuki*; Takamiya, Koichi*; Pyeon, C. H.*; Fukutani, Satoshi*; Fujii, Toshiyuki*; Hori, Junichi*; Yashima, Hiroshi*

A nuclear data project entitled Research and development for Accuracy Improvement of neutron nuclear data on Minor ACtinides (AIMAC) is being performed in Japan. The objective of the project is to improve accuracy of neutron nuclear data for minor actinides and some fission products, which is required for developing innovative nuclear system transmuting these nuclei. Following research items have been conducted to achieve the objective: (1) Measurements of thermal neutron capture cross-sections by activation methods, (2) High-precision quantifications of shielded sample amounts used for TOF measurement, (3) Resonance parameter determinations at J-PARC/ANNRI and KURRI/LINAC, (4) Extension of capture cross sections to high energy neutrons at J-PARC/ANNRI, (5) High quality evaluation based on iterative communication with experimenters. The achievement of the project is presented.

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