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$$Q_{beta}$$ measurements of $$^{158,159}$$Pm, $$^{159,161}$$Sm, $$^{160-165}$$Eu, $$^{163}$$Gd and $$^{166}$$Tb using a total absorption BGO detector

全吸収BGO検出器を用いた$$^{158,159}$$Pm, $$^{159,161}$$Sm, $$^{160-165}$$Eu, $$^{163}$$Gd, $$^{166}$$Tbの$$Q_{beta}$$の測定

林 裕晃*; 秋田 幸範*; 末松 倫*; 柴田 理尋*; 浅井 雅人; 佐藤 哲也; 市川 進一; 西中 一朗; 永目 諭一郎; 長 明彦; 塚田 和明; 石井 哲朗; 小島 康明*; 谷口 秋洋*

Hayashi, Hiroaki*; Akita, Yukinori*; Suematsu, Osamu*; Shibata, Michihiro*; Asai, Masato; Sato, Tetsuya; Ichikawa, Shinichi; Nishinaka, Ichiro; Nagame, Yuichiro; Osa, Akihiko; Tsukada, Kazuaki; Ishii, Tetsuro; Kojima, Yasuaki*; Taniguchi, Akihiro*

全吸収BGO検出器を用いて$$^{160-165}$$Euと$$^{163}$$Gdの$$Q_{beta}$$を初めて測定し、また過去に測定した$$^{158,159}$$Pm, $$^{159,161}$$Sm, $$^{166}$$Tbのデータを再解析した。これらの核種は、原子力機構東海タンデム加速器施設において$$^{238}$$Uの陽子誘起核分裂で合成し、オンライン同位体分離装置を用いて核反応生成物の中から分離した。得られた質量偏差と2中性子分離エネルギーの値を、原子質量評価値や理論計算の値と比較した。

$$Q_{beta}$$ values of $$^{160-165}$$Eu and $$^{163}$$Gd were measured for the first time using a total absorption BGO detector, and the data of $$^{158,159}$$Pm, $$^{159,161}$$Sm, and $$^{166}$$Tb obtained previously were reanalyzed. These nuclei were produced by the proton-induced fission of $$^{238}$$U at the JAEA-Tokai tandem accelerator facility, and separated from the reaction products using an on-line isotope separator. The deduced mass excesses and two-neutron separation energies were compared with those of atomic mass evaluations and theoretical predictions.

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パーセンタイル:25.53

分野:Physics, Nuclear

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