Basic study on gas phase chemistry using carbon cluster transport system

During the past several years, our group has studied the volatile properties of the compounds of the group-4 elements including Rf, especially tetrachloride compounds, using an isothermal gas chromatographic method. When He/KCl and HCl were used as the transportation and the reaction gas respectively, serious problem arose because of the generation of the nonvolatile chloride oxides by the residual oxygen in the system. In this work, the carbon cluster transport system was newly applied in order to eliminate the residual oxygen in the system. Using the fission fragments from 252Cf, it was found that the transport efficiency was about 50%, and the volatile Zr compound was also measured. From this result, it is suggested that this system is applicable to the gas phase chemistry experiments. The result of the chromatography of Zr compound will be discussed in the presentation. (author)