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パルス中性子法による中性子寿命の測定

Measurement of neutron lifetime by pulsed neutron method

西原 健司; 菅原 隆徳 ; 岩元 大樹; 辻本 和文; Pyeon, C. H.*; 八木 貴宏*

Nishihara, Kenji; Sugawara, Takanori; Iwamoto, Hiroki; Tsujimoto, Kazufumi; Pyeon, C. H.*; Yagi, Takahiro*

パルス中性子法に対して新たに統計的手法(最尤法)を適用し、未臨界度とともに中性子寿命を得る手法を開発した。KUCAにおいて複数の未臨界度に対して、異なる周波数のDT中性子源を入射する実験を行い本手法で妥当な結果が得られること示した。

Analysis method for the pulsed neutron method is newly developed to obtain neutron lifetime with subcriticality based on the maximum likelihoods method. The method was validated by experiments in the KUCA with several subcriticalities injected by a DT neutron source with several repetitions.

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