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Misassigned neutron resonances of $$^{142}$$Nd and stellar neutron capture cross sections

$$^{142}$$Ndのミスアサインされた中性子共鳴と恒星内中性子捕獲断面積

片渕 竜也*; 松橋 泰平*; 寺田 和司; 井頭 政之*; 水本 元治*; 廣瀬 健太郎; 木村 敦; 岩本 信之; 原 かおる*; 原田 秀郎 ; 堀 順一*; 加美山 隆*; 木野 幸一*; 北谷 文人; 鬼柳 善明*; 中村 詔司; 藤 暢輔

Katabuchi, Tatsuya*; Matsuhashi, Taihei*; Terada, Kazushi; Igashira, Masayuki*; Mizumoto, Motoharu*; Hirose, Kentaro; Kimura, Atsushi; Iwamoto, Nobuyuki; Hara, Kaoru*; Harada, Hideo; Hori, Junichi*; Kamiyama, Takashi*; Kino, Koichi*; Kitatani, Fumito; Kiyanagi, Yoshiaki*; Nakamura, Shoji; Toh, Yosuke

Time-of-flight spectra of the neutron capture events of $$^{142}$$Nd were measured using a spallation neutron source at the Japan Proton Accelerator Research Complex. The first six resonances of $$^{142}$$Nd reported in a previous work were not observed. The experimental results and cross-search of resonance energies in nuclear data libraries suggested that resonances of impurity nuclide $$^{141}$$Pr have been mistakenly assigned as $$^{142}$$Nd in the previous experiment. To investigate the impact of non-existence of the resonances to the s-process nucleosynthesis model, the Maxwellian averaged neutron capture cross sections with and without the misassigned resonances were compared.

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