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Anion-exchange behavior of element 105, Db, in HF/HNO$$_{3}$$ media

105番元素(Db)のHF/HNO$$_{3}$$水溶液中における陰イオン交換挙動

笠松 良崇; 豊嶋 厚史; 浅井 雅人; 塚田 和明; 羽場 宏光*; 石井 康雄; 當銘 勇人; 西中 一朗; 秋山 和彦*; 菊永 英寿*; 後藤 真一*; 石川 剛*; 工藤 久昭*; 佐藤 渉*; 大江 一弘*; 栗林 隆宏*; 篠原 厚*; 木下 哲一*; 荒井 美和子*; 横山 明彦*; 阪間 稔*; 佐藤 哲也; Qin, Z.*; D$"u$llmann, Ch. E.*; 永目 諭一郎

Kasamatsu, Yoshitaka; Toyoshima, Atsushi; Asai, Masato; Tsukada, Kazuaki; Haba, Hiromitsu*; Ishii, Yasuo; Tome, Hayato; Nishinaka, Ichiro; Akiyama, Kazuhiko*; Kikunaga, Hidetoshi*; Goto, Shinichi*; Ishikawa, Tsuyoshi*; Kudo, Hisaaki*; Sato, Wataru*; Oe, Kazuhiro*; Kuribayashi, Takahiro*; Shinohara, Atsushi*; Kinoshita, Norikazu*; Arai, Miwako*; Yokoyama, Akihiko*; Sakama, Minoru*; Sato, Tetsuya; Qin, Z.*; D$"u$llmann, Ch. E.*; Nagame, Yuichiro

タンデム加速器を用いて$$^{248}$$Cm($$^{19}$$F, 5${it n}$)反応により合成した105番元素$$^{262}$$Db(T$$_{1/2}$$=34s)の0.89M HF/0.3M HNO$$_{3}$$水溶液中における陰イオン交換挙動を迅速イオン交換装置を用いて調べた。周期表上で同族元素であるNb, Ta, 擬似同族元素Paの陰イオン交換挙動もHF/HNO$$_{3}$$水溶液系で詳細に調べた。それぞれの結果の比較からDbの挙動が本実験条件下でTaの挙動とは大きく異なり、NbやPaの挙動に比較的近いことがわかった。

Dubnium-262 was produced in the $$^{248}$$Cm($$^{19}$$F, 5${it n}$) reaction at the JAEA tandem accelerator. Adsorption of Db on the anion-exchange resin was investigated in 0.89 M HF/0.3 M HNO$$_{3}$$ solution. The anion-exchange behavior of Nb, Ta, and Pa as homologues of Db was also examined in details in HF/HNO$$_{3}$$ solutions. From the comparison of those results, we found that the adsorption of Db on the anion-exchange resin is considerably weaker than that of Ta and is relatively similar to those of Nb and Pa in the studied conditions.

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