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Oral presentation

Anion-exchange behavior of element 105, Db, in HF/HNO$$_{3}$$ media

Kasamatsu, Yoshitaka; Toyoshima, Atsushi; Asai, Masato; Tsukada, Kazuaki; Haba, Hiromitsu*; Ishii, Yasuo; Tome, Hayato; Nishinaka, Ichiro; Akiyama, Kazuhiko*; Kikunaga, Hidetoshi*; et al.

no journal, , 

Dubnium-262 was produced in the $$^{248}$$Cm($$^{19}$$F, 5${it n}$) reaction at the JAEA tandem accelerator. Adsorption of Db on the anion-exchange resin was investigated in 0.89 M HF/0.3 M HNO$$_{3}$$ solution. The anion-exchange behavior of Nb, Ta, and Pa as homologues of Db was also examined in details in HF/HNO$$_{3}$$ solutions. From the comparison of those results, we found that the adsorption of Db on the anion-exchange resin is considerably weaker than that of Ta and is relatively similar to those of Nb and Pa in the studied conditions.

Oral presentation

Chemical behavior of element-105, Db, in mixed HF/HNO$$_{3}$$ solutions

Kasamatsu, Yoshitaka; Tome, Hayato; Toyoshima, Atsushi; Tsukada, Kazuaki; Asai, Masato; Ishii, Yasuo; Nishinaka, Ichiro; Sato, Tetsuya; Shinohara, Nobuo; Nagame, Yuichiro; et al.

no journal, , 

Anion-exchange behavior of $$^{262}$$Db (half-life ${it T$_{1/2}$}$ = 34 s) produced in the $$^{248}$$Cm($$^{19}$$F, 5${it n}$) reaction at the JAEA tandem accelerator was investigated in the mixed 0.89 M HF/0.3 M HNO$$_{3}$$ solution ([F$$^{-}$$] = 3 $$times$$ 10$$^{-3}$$ 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 $$^{88}$$Nb (${it T$_{1/2}$}$ = 14.3 min) and $$^{170}$$Ta (${it T$_{1/2}$}$ = 6.76 min) produced in the $$^{nat}$$Ge($$^{19}$$F, ${it xn}$) and $$^{nat}$$Gd($$^{19}$$F, ${it xn}$) reactions, respectively. It was found that the adsorption probability on the anion-exchange resin is in the order of Ta $$>$$ Nb $$sim$$ Db under the present condition.

Oral presentation

Adsorption of element-105 (Db) on anion-exchange resin in HF/HNO$$_{3}$$ solutions

Kasamatsu, Yoshitaka; Toyoshima, Atsushi; Asai, Masato; Tsukada, Kazuaki; Haba, Hiromitsu*; Ishii, Yasuo; Tome, Hayato; Nishinaka, Ichiro; Akiyama, Kazuhiko*; Kikunaga, Hidetoshi*; et al.

no journal, , 

Dubnium-262 was produced in the nuclear reaction of $$^{248}$$Cm($$^{19}$$F,5n)$$^{262}$$Db using the JAEA Tandem accelerator. The reaction products were rapidly transported to the chemistry laboratory and the anion-exchange behavior of Db in HF/HNO$$_{3}$$ media was investigated with an on-line rapid ion-exchange apparatus. Based on the comparison of the behavior of Db with that of its homologues (Nb, Ta, and Pa), the fluoride complex formation of Db was discussed.

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