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Development of an on-line isothermal gas chromatographic apparatus for Db and Sg

Sato, Tetsuya   ; Tsukada, Kazuaki  ; Asai, Masato  ; Toyoshima, Atsushi; Kasamatsu, Yoshitaka*; Li, Z.; Sato, Nozomi; Kikuchi, Takahiro; Haba, Hiromitsu*; Goto, Shinichi*; Kudo, Hisaaki*; Nagame, Yuichiro 

To investigate chemical properties of the transactinide elements dubnium (Db, Z = 105) and seaborgium (Sg, Z = 106), we have developed an on-line isothermal gas chromatographic apparatus. The on-line experiments with the group-5 and -6 elements using the short lived 88Nb and 170Ta as the homologues of Db and 173W as the one of Sg were conducted. We measured the relative chemical yields of volatile compounds of 88Nb, 170Ta and 173W as a function of the isothermal temperature. The behavior of W and Nb was the same as that obtained in previous work by M. Gartner et al., and A. Turler et al., respectively. It was found that the volatility of compounds of Ta is lower than that of Nb.

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