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Adsorption behavior of $$^{181}$$W and $$^{rm 93m}$$Mo as lighter homologues of seaborgium (Sg) in HF/HNO$$_{3}$$ on anion-exchange resin

シーボーギウム(Sg)の軽同族元素$$^{181}$$Wと$$^{rm 93m}$$MoのHF/HNO$$_{3}$$混合水溶液中における陰イオン交換樹脂への吸着挙動

Liang, X. H.*; 塚田 和明 ; 豊嶋 厚史; Li, Z.*; 浅井 雅人 ; 佐藤 哲也  ; 佐藤 望; 永目 諭一郎

Liang, X. H.*; Tsukada, Kazuaki; Toyoshima, Atsushi; Li, Z.*; Asai, Masato; Sato, Tetsuya; Sato, Nozomi; Nagame, Yuichiro

無単体放射性トレーサー$$^{181}$$Wと$$^{rm 93m}$$Moをそれぞれ$$^{181}$$Ta($$p$$, $$n$$)反応と$$^{rm nat}$$Nb($$p$$, $$n$$)反応によって生成し、HFとHNO$$_{3}$$の混合水溶液中における陰イオン交換樹脂への吸着挙動を10$$^{-4}$$-10$$^{-1}$$Mの濃度範囲で調べた。70$$^{circ}$$Cにおける$$^{181}$$Wと$$^{rm 93m}$$Moの分配係数($$K_{rm d}$$)は10$$^{-1}$$M HF/0.1M HNO$$_{3}$$で最小値を持つV字型の変化を示したが、$$^{rm 93m}$$Moの$$K_{rm d}$$値の変化は$$^{181}$$Wの変化に比べて非常に小さいことが明らかとなった。WとMoのオキソフルオロ錯体の形成についての考察を行った。

Adsorption of carrier-free radiotracers $$^{181}$$W and $$^{rm 93m}$$Mo produced in the $$^{181}$$Ta($$p$$, $$n$$) and $$^{rm nat}$$Nb($$p$$, $$n$$) reactions, respectively, on anion-exchange resin was studied in mixed solution of HF and HNO$$_{3}$$ in a concentration range of 10$$^{-4}$$ - 10$$^{-1}$$ M HF/0.1 M HNO$$_{3}$$. Distribution coefficients ($$K_{rm d}$$) of $$^{181}$$W and $$^{rm 93m}$$Mo at 70 $$^{circ}$$C showed the V-shaped variation with the minimum at around 10$$^{-1}$$ M HF/0.1 M HNO$$_{3}$$ although variation of the $$K_{rm d}$$ values for $$^{rm 93m}$$Mo was quite small compared with that for $$^{181}$$W. Formation of oxofluoro complexes for W and Mo is briefly discussed.

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パーセンタイル:58.08

分野:Chemistry, Analytical

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