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Neutron-capture cross-sections of $$^{244}$$Cm and $$^{246}$$Cm measured with an array of large germanium detectors in the ANNRI at J-PARC/MLF

J-PARC/MLF/ANNRIに設置された大型Ge検出器を用いた$$^{244}$$Cm及び$$^{246}$$Cmの中性子捕獲反応断面積の測定

木村 敦; 藤井 俊行*; 福谷 哲*; 古高 和禎; 後神 進史*; 原 かおる; 原田 秀郎 ; 廣瀬 健太郎; 堀 順一*; 井頭 政之*; 加美山 隆*; 片渕 竜也*; 金 政浩; 木野 幸一*; 北谷 文人; 鬼柳 善明*; 小泉 光生; 水本 元治*; 中村 詔司; 太田 雅之; 大島 真澄; 高宮 幸一*; 藤 暢輔

Kimura, Atsushi; Fujii, Toshiyuki*; Fukutani, Satoshi*; Furutaka, Kazuyoshi; Goko, Shinji*; Hara, Kaoru; Harada, Hideo; Hirose, Kentaro; Hori, Junichi*; Igashira, Masayuki*; Kamiyama, Takashi*; Katabuchi, Tatsuya*; Kin, Tadahiro; Kino, Koichi*; Kitatani, Fumito; Kiyanagi, Yoshiaki*; Koizumi, Mitsuo; Mizumoto, Motoharu*; Nakamura, Shoji; Ota, Masayuki; Oshima, Masumi; Takamiya, Koichi*; Toh, Yosuke

The neutron-capture cross sections of $$^{244}$$Cm and $$^{246}$$Cm were measured in the energy range of 1-300 eV with an array of large germanium detectors in the ANNRI at J-PARC/MLF. The resonances at around 7.7 and 16.8 eV of $$^{244}$$Cm and 4.3 and 15.3 eV of $$^{246}$$Cm were observed in capture reactions for the first time. The uncertainties of the obtained cross sections are 5.8% at the top of the first resonance of $$^{244}$$Cm and 6.6% at that of $$^{246}$$Cm. Resonance analyses were performed for low-energy ones using the code SAMMY. The prompt $$gamma$$-ray spectra of $$^{244}$$Cm and $$^{246}$$Cm were also obtained. Eight and five new prompt $$gamma$$-rays emitted were observed in the $$^{244}$$Cm(n,$$gamma$$) and $$^{246}$$Cm(n,$$gamma$$) reactions, respectively.

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