Isothermal gas chromatographic behavior of hafnium isotopes

Tomitsuka, Tomohiro*; Kojima, Takayuki*; Murakami, Masashi*  ; Goto, Shinichi*; Sato, Tetsuya   ; Tsukada, Kazuaki  ; Asai, Masato  ; Toyoshima, Atsushi; Oe, Kazuhiro; Nagame, Yuichiro ; Kaneya, Yusuke*; Kudo, Hisaaki*

In order to study on chemical properties of superheavy element, rutherfordium (Rf, Z=104), we have investigated gas chromatographic behavior of group 4 elements by using an online gas chromatographic technique. Assuming that the gas chromatographic behavior can be described by a typical adsorption-desorption model, an adsorption enthalpy of chemical species of interest on a column surface can be deduced only by comparing the gas chromatographic behavior of isotopes with different half-lives. In this work, we compared gas chromatographic behavior of the short-lived Hf isotopes, Hf ( = 78 s), Hf ( = 406 s) and Hf ( = 123 s). The difference between Hf and Hf was smaller than that expected from the simple adsorption-desorption model. This result suggests a different process can be expected from the model of adsorption and desorption behavior.