Sg(Z=106)を模擬したMoオキシ塩化物の等温ガスクロマトグラフ挙動

Isothermal gas chromatographic behavior of Mo oxychlorides as a model of Sg (Z=106)

名取 日菜; 佐藤 哲也   ; 浅井 雅人  ; 伊藤 由太   ; 内馬場 優太; Gong, G.; 塚田 和明  ; 宮地 優太; 永目 諭一郎* 

Natori, Hina; Sato, Tetsuya; Asai, Masato; Ito, Yuta; Uchibaba, Yuta; Gong, G.; Tsukada, Kazuaki; Miyachi, Yuta; Nagame, Yuichiro*

106番元素シーボーギウム(Sg)の化学的性質の解明を目的に、オフライン等温ガスクロマトグラフ装置を構築した。Sgのモデル実験として、本装置を用いてCfの自発核分裂で生成する短寿命Mo同位体を対象に揮発性オキシ塩化物の気相化学実験をおこない、Sg同族元素Moの吸着エンタルピーを測定した。得られた値は対象となる揮発性化合物の昇華エンタルピーからの推定値と一致した。

To elucidate the chemical properties of element 106, seaborgium (Sg), we have constructed an off-line isothermal gas chromatographic system. As a model experiment for Sg using the system, gas-phase chemical experiments were performed for volatile oxychlorides of short-lived molybdenum (Mo) isotopes, a homolog of Sg, produced in spontaneous fission of Cf. The optimum experimental conditions were obtained for isothermal gas chromatographic experiments using this apparatus. The observed isothermal gas chromatographic behaviors of short-lived Mo isotopes, we have successfully determined values of the adsorption enthalpies of Mo oxychlorides on the column surface. These values were in good agreement with those estimated from the sublimation enthalpies of the compounds.