Refine your search:     
Report No.

Ion-exchange experiments of Nb and Ta in HF/HNO$$_{3}$$ solution for identification of fluoride species of Db

Toyoshima, Atsushi; Mitsukai, Akina; Murakami, Masashi*; Sato, Daisuke*; Motoyama, Risa*; Oe, Kazuhiro*; Komori, Yukiko*; Haba, Hiromitsu*; Asai, Masato ; Tsukada, Kazuaki ; Sato, Tetsuya  ; Kaneya, Yusuke; Nagame, Yuichiro

The purpose of the present study is characterization of fluoride complexes of Db. In this study, we investigated anion-exchange behavior of Nb and Ta, lighter homologs of Db, in 1.0-24 M HF/2.0 M HNO$$_{3}$$ solutions as a model experiment of Db. $$^{95g}$$Nb and $$^{179}$$Ta produced at JAEA tandem accelerator and RIKEN AVF cyclotron, respectively, were prepared as non-carrier-added radiotracers by an ion exchange method. Batch experiments were performed with anion-exchange resin. As a result, distribution coefficients ($${it K}$$$$_{d}$$) of Nb showed a sharp increase at $$>$$ 6 M HF while those of Ta had a monotonic decrease as increasing HF concentration. This suggests that Nb forms fluoride complexes from oxy fluoride one at $$>$$ 6 M HF and Ta exists as fluoride complexes under the conditions. It is expected that chemical species of Db fluorides are characterized in its anion-exchange experiments under the present conditions.



- Accesses





[CLARIVATE ANALYTICS], [WEB OF SCIENCE], [HIGHLY CITED PAPER & CUP LOGO] and [HOT PAPER & FIRE LOGO] are trademarks of Clarivate Analytics, and/or its affiliated company or companies, and used herein by permission and/or license.