38 research outputs found
Development of a low-energy radioactive ion beam facility for the MARA separator
A low-energy radioactive ion beam facility for the production and study of
nuclei produced close to the proton drip line is under development at the
Accelerator Laboratory of the University of Jyv\"askyl\"a, Finland. The
facility will take advantage of the mass selectivity of the recently
commissioned MARA vacuum-mode mass separator. The ions selected by MARA will be
stopped and thermalised in a small-volume gas cell prior to extraction and
further mass separation. The gas cell design allows for resonance laser
ionisation/spectroscopy both in-gas-cell and in-gas-jet. The facility will
include experimental setups allowing ion counting, mass measurement and decay
spectroscopy.Comment: Paper accepted for publication at Hyperfine Interaction
Online chemical adsorption studies of Hg, Tl, and Pb on SiO2 and Au surfaces in preparation for chemical investigations on Cn, Nh, and Fl at TASCA
Online gas-solid adsorption studies with single-atom quantities of Hg, Tl, and Pb, the lighter homologs of the superheavy elements (SHE) copernicium (Cn, Z =112), nihonium (Nh, Z =113), and flerovium (Fl, Z =114), were carried out using short-lived radioisotopes. The interaction with Au and SiO 2 surfaces was studied and the overall chemical yield was determined. Suitable radioisotopes were produced in fusion-evaporation reactions, isolated in the gas-filled recoil separator TASCA, and flushed rapidly to an adjacent setup of two gas chromatography detector arrays covered with SiO 2 (first array) and Au (second array). While Tl and Pb adsorbed on the SiO 2 surface, Hg interacts only weakly and reached the Au-covered array. Our results contribute to elucidating the influence of relativistic effects on chemical properties of the heaviest elements by providing experimental data on these lighter homologs
Combining in-beam gamma-ray and conversion electron spectroscopy : the SAGE spectrometer
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