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Adsorption of Db and its homologues Nb and Ta, and the pseudo-homologue Pa on anion-exchange resin in HF solution

Tsukada, Kazuaki; Haba, Hiromitsu*; Asai, Masato; Toyoshima, Atsushi; Akiyama, Kazuhiko*; Kasamatsu, Yoshitaka; Nishinaka, Ichiro; Ichikawa, Shinichi; Yasuda, Kenichiro; Miyamoto, Yutaka; Hashimoto, Kazuyuki; Nagame, Yuichiro; Goto, Shinichi*; Kudo, Hisaaki*; Sato, Wataru*; Shinohara, Atsushi*; Oura, Yasuji*; Sueki, Keisuke*; Kikunaga, Hidetoshi*; Kinoshita, Norikazu*; Yokoyama, Akihiko*; Sch$"a$del, M.*; Br$"u$chle, W.*; Kratz, J. V.*

Anion-exchange chromatography of element 105, dubnium (Db), produced in the $$^{248}$$Cm($$^{19}$$F, 5n)$$^{262}$$Db reaction is investigated together with the homologues Nb and Ta, and the pseudo-homologue Pa in 13.9 M hydrofluoric acid (HF) solution. The distribution coefficient (K$$_{d}$$) of Db on an anion-exchange resin is successfully determined by running cycles of the 1702 chromatographic column separations. The result clearly indicates that the adsorption of Db on the resin is significantly different from that of the homologues and that the adsorption of anionic fluoro complexes of these elements decreases in the sequence of Ta $$approx$$ Nb $$>$$ Db $$geq$$ Pa.

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Category:Chemistry, Inorganic & Nuclear

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