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Report No.

Redox studies of the heaviest elements using an electrolytic column apparatus

Toyoshima, Atsushi; Oe, Kazuhiro; Asai, Masato ; Miyashita, Sunao; Sato, Tetsuya  ; Sato, Nozomi; Kaneya, Yusuke*; Kitatsuji, Yoshihiro ; Tsukada, Kazuaki ; Nagame, Yuichiro; Sch$"a$del, M.; Kasamatsu, Yoshitaka*; Shinohara, Atsushi*; Haba, Hiromitsu*; Even, J.*; Omtvedt, J. P.*; Kratz, J. V.*

In this paper, we will present the electrolytic reduction of trivalent mendelevium (Md, element 101) and the oxidation of divalent nobelium (No, element 102) using our newly developed flow electrolytic column apparatus. All experiments were carried out at the JAEA tandem accelerator in Tokai. Redox reactions of Md and No, between the 2+ and 3+ states, were clearly observed. Redox potentials of these elements were successfully determined based on observed amounts of the oxidized or reduced state as a function of the applied potential. In the preparation of future experiment with seaborgium (Sg, element 106), we recently began a study on the reduction of the lighter group-6 homologs Mo and W using an electrolytic column apparatus. Our recent results of the reduction of Mo and W will be also presented.



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