Chemical behavior of element-105, Db, in mixed HF/HNO solutions

Kasamatsu, Yoshitaka; Tome, Hayato; Toyoshima, Atsushi; Tsukada, Kazuaki  ; Asai, Masato  ; Ishii, Yasuo; Nishinaka, Ichiro; Sato, Tetsuya   ; Shinohara, Nobuo ; Nagame, Yuichiro ; Haba, Hiromitsu*; Kikunaga, Hidetoshi*; Akiyama, Kazuhiko*; Goto, Shinichi*; Ishikawa, Tsuyoshi*; Kudo, Hisaaki*; Sato, Wataru*; Oe, Kazuhiro*; Kuribayashi, Takahiro*; Shinohara, Atsushi*; Kinoshita, Norikazu*; Arai, Miwako*; Yokoyama, Akihiko*; Sakama, Minoru*; Qin, Z.*; Dllmann, Ch. E.*

Anion-exchange behavior of Db (half-life = 34 s) produced in the Cm(F, 5) reaction at the JAEA tandem accelerator was investigated in the mixed 0.89 M HF/0.3 M HNO solution ([F] = 3 10 M) with the automated ion-exchange separation apparatus coupled with the detection system for alpha-spectroscopy (AIDA). Anion-exchange behavior of its lighter homologues, Nb and Ta, was also studied under the same conditions using Nb ( = 14.3 min) and Ta ( = 6.76 min) produced in the Ge(F, ) and Gd(F, ) reactions, respectively. It was found that the adsorption probability on the anion-exchange resin is in the order of Ta Nb Db under the present condition.