Chemical studies of Mo and W in preparation of a Seaborgium (Sg) reduction experiment using MDG, FEC, and SISAK

Toyoshima, Atsushi; Miyashita, Sunao*; Asai, Masato  ; Sato, Tetsuya   ; Kaneya, Yusuke; Tsukada, Kazuaki  ; Kitatsuji, Yoshihiro  ; Nagame, Yuichiro ; Schdel, M.; Lerum, H. V.*; Omtvedt, J. P.*; Oshimi, Yoshinari*; Oe, Kazuhiro*; Kitayama, Yuta*; Yokoyama, Akihiko*; Wada, Ayaka*; Oura, Yasuji*; Haba, Hiromitsu*; Kanaya, Jumpei*; Huang, M.*; Komori, Yukiko*; Yokokita, Takuya*; Kasamatsu, Yoshitaka*; Shinohara, Atsushi*; Pershina, V.*; Kratz, J. V.*

To carry out a continuous reduction experiment of Sg with the low production rates and the short half-life, we are developing a new chemistry assembly consisting of a membrane degasser (MDG), a flow electrolytic column (FEC), the continuous liquid-liquid extraction apparatus, and the liquid scintillation counting system (SISAK). Recently, we have begun preparatory studies with Mo and W isotopes. Aqueous solution dissolving Mo and W was successfully separated from a carrier gas. Redox couples of Mo(VI)/Mo(V) and W(VI)/W(V) in HCl have been characterized for their macro amounts. Extraction behavior of Mo(VI) and W(VI) between toluene containing hinokitiol (HT) and HCl was successfully observed by a batch method. On-line extractions of short-lived Mo and W were also carried out using SISAK and MDG. In the symposium, our present status of the preparation with Mo and W will be presented.