Development of an apparatus for seaborgium studies by high temperature gas chromatography

In preparation of experiments to characterize Sg as oxide hydroxide a new High Temperature On-Line Gas Chromatography Apparatus (HITGAS) based on the OLGA design was developed. The time-consuming recluster step was replaced by direct deposition of species leaving the chromatographic column on metal foils. In test experiments with short-lived Mo isotopes a retention time of 9 s was determined for an isothermal temperature of 1270 K, sufficiently short to study Sg isotopes 265Sg and 266Sg. A model based on the theory of supersonic expansion of gases and on simple geometric considerations reproduces the data of direct condensation experiments quite well.