Sulfate complexation of element 104, Rf, in HSO/HNO mixed solution

硫酸・硝酸混合水溶液中での104番元素ラザホージウムの硫酸錯体の形成

Li, Z.*; 豊嶋 厚史; 浅井 雅人  ; 塚田 和明  ; 佐藤 哲也   ; 佐藤 望; 菊池 貴宏; 永目 諭一郎 ; Schdel, M.; Pershina, V.*; Liang, X. H.*; 笠松 良崇*; 小森 有希子*; 大江 一弘; 篠原 厚*; 後藤 真一*; 村山 裕史*; 村上 昌史*  ; 工藤 久昭*; 羽場 宏光*; 武田 勇樹*; 西川 恵*; 横山 明彦*; 五十嵐 訓*; 末木 啓介*; 秋山 和彦*; Kratz, J. V.*

Li, Z.*; Toyoshima, Atsushi; Asai, Masato; Tsukada, Kazuaki; Sato, Tetsuya; Sato, Nozomi; Kikuchi, Takahiro; Nagame, Yuichiro; Schdel, 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 Rf ( = 78 s) produced in the Cm(O, 5) reaction was studied on a one-atom-at-a-time scale in 0.15-0.69 M HSO/HNO 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 Rf on cation-exchange resin decrease with an increase of [HSO], 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.