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Anion-exchange behavior of Db in HF/HNO$$_{3}$$ mixed solution using a new on-line chemical apparatus

Tsukada, Kazuaki  ; Kasamatsu, Yoshitaka*; Asai, Masato  ; Toyoshima, Atsushi; Ishii, Yasuo; Li, Z.; Kikuchi, Takahiro; Sato, Tetsuya   ; Nishinaka, Ichiro; Nagame, Yuichiro ; Goto, Shinichi*; Hasegawa, Taichi*; Kudo, Hisaaki*; Haba, Hiromitsu*; Kudo, Yuki*; Oe, Kazuhiro*; Fujisawa, Hiroyuki*; Yahagi, Wataru*; Sato, Wataru*; Shinohara, Atsushi*; Oura, Yasuji*; Nanri, Tomohiro*; Araki, Mikio*; Yokoyama, Akihiko*; Fan, F.*

Anion-exchange chromatographic behavior of element 105, dubnium (Db), produced in the $$^{248}$$Cm($$^{19}$$F,5n) reaction is investigated together with the homologues Nb and Ta in HF/HNO$$_{3}$$ mixed media using a newly developed on-line experimental system. The result indicates that the adsorption sequence on the anion-exchange resin is Ta $$gg$$ Nb $$geq$$ Db, and the fluoride complex formation of Db is expected to be weaker than that of homologues.

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