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Sulfate complexation of element 104, Rf, in H$$_{2}$$SO$$_{4}$$/HNO$$_{3}$$ mixed solution

Li, Z.*; Toyoshima, Atsushi; Asai, Masato; Tsukada, Kazuaki; Sato, Tetsuya; Sato, Nozomi; Kikuchi, Takahiro; Nagame, Yuichiro; Sch$"a$del, M.; Pershina, V.*; Liang, X. H.*; Kasamatsu, Yoshitaka*; Komori, Yukiko*; Oe, Kazuhiro; Shinohara, Atsushi*; Goto, Shinichi*; Murayama, Hiroshi*; Murakami, Masashi*; Kudo, Hisaaki*; Haba, Hiromitsu*; Takeda, Yuki*; Nishikawa, Megumi*; Yokoyama, Akihiko*; Ikarashi, Satoshi*; Sueki, Keisuke*; Akiyama, Kazuhiko*; Kratz, J. V.*

The cation-exchange behavior of $$^{261}$$Rf ($$T_{1/2}$$ = 78 s) produced in the $$^{248}$$Cm($$^{18}$$O, 5$$n$$) reaction was studied on a one-atom-at-a-time scale in 0.15-0.69 M H$$_{2}$$SO$$_{4}$$/HNO$$_{3}$$ mixed solutions ([H$$^{+}$$] = 1.0 M) using an automated ion-exchange separation apparatus coupled with the detection system for alpha-spectroscopy (AIDA). It was found that adsorption probabilities ($$%$$ads) of $$^{261}$$Rf on cation-exchange resin decrease with an increase of [HSO$$_{4}$$$$^{-}$$], showing a successive formation of Rf sulfate complexes. Rf exhibits a weaker complex formation tendency compared to the lighter homologues Zr and Hf. This is in good agreement with theoretical predictions including relativistic effects.



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Category:Chemistry, Inorganic & Nuclear



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