Anion-exchange behavior of Db in HF/HNO mixed solution using an on-line chemical apparatus

Tsukada, Kazuaki  ; Kasamatsu, Yoshitaka*; Asai, Masato  ; Toyoshima, Atsushi; Ishii, Yasuo; Li, Z.; Kikuchi, Takahiro; Sato, Tetsuya   ; Nagame, Yuichiro ; Schdel, M.; Goto, Shinichi*; Hasegawa, Taichi*; Kudo, Hisaaki*; Haba, Hiromitsu*; Kudo, Yuki*; Kikunaga, Hidetoshi*; Oe, Kazuhiro*; Fujisawa, Hiroyuki*; Sato, Wataru*; Shinohara, Atsushi*; Oura, Yasuji*; Akiyama, Kazuhiko*; Nanri, Tomohiro*; Araki, Mikio*; Yokoyama, Akihiko*; Sueki, Keisuke*

We have investigated the chemical behavior of Db together with its group-5 homologues by anion-exchange chromatography in HF/HNO mixed solution using a rapid online chemical apparatus (AIDA-II). The nuclides Db, Nb and Ta were produced in the Cm(F, n), Ge(F, n) and Gd(F, n) reactions, respectively, at the JAEA tandem accelerator. On-line anion-exchange separations of Db, Nb and Ta were performed using the AIDA-II. Thousand times of anion-exchange separations were conducted using AIDA-II. events were registered, and the values for Db was evaluated. From these results, the adsorption sequence Pa Db Nb Ta was determined. The present result shows a notable difference in the adsorption behavior between Db and its homologue Ta. In the conference, the present status and the perspective of the aqueous chemistry of Db at JAEA will be also presented.