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Report No.
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Developments towards aqueous phase chemistry of transactinide elements

Toyoshima, Atsushi; Oe, Kazuhiro*; Asai, Masato; Attallah, M. F.*; Goto, Naoya*; Gupta, N. S.*; Haba, Hiromitsu*; Kaneko, Masashi* ; Kaneya, Yusuke; Kasamatsu, Yoshitaka*; Kitatsuji, Yoshihiro; Kitayama, Yuta*; Koga, Kazuki*; Komori, Yukiko*; Koyama, Takumi*; Kratz, J. V.*; Lerum, H. V.*; Mitsukai, Akina; Miyashita, Sunao*; Oshimi, Yoshinari*; Valeria, P.*; Sato, Daisuke*; Sato, Tetsuya; Shigekawa, Yudai*; Shinohara, Atsushi*; Tanaka, Akira*; Tsukada, Kazuaki; Tsuto, Shohei*; Vascon, A.*; Yokokita, Takuya*; Yokoyama, Akihiko*; Omtvedt, J. P.*; Nagame, Yuichiro; Sch$"a$del, M.*

Due to short half-lives less than 10 s and extremely low production rates, transactinide elements heavier than seaborgium (Sg) are produced on an atom per hour scale. Therefore, a continuous rapid chemistry assembly is required to study aqueous-phase chemistry of these heaviest elements. In the present study, we started developments of a continuous chemistry assembly. Our first attempt was made in on-line experiments with Mo and W, lighter homologs of Sg, to optimize a chemistry assembly consisting of a newly developed membrane degasser as an interface between gas-jet and aqueous phase, a flow electrolytic column apparatus utilized to control oxidation states of Mo and W ions, and the continuous liquid-liquid extraction apparatus of SISAK for separation. In the conference, present status of the developments will be presented.

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