Abstract
The first tests for stopping and extraction of energetic (92 MeV/u), short-lived 38 Ca and 37 K fragments are reported. The fragments were stopped and thermalized in 50 cm of helium at 1 bar. The ions were transported by electric fields and gas flow and jetted into an expansion chamber through a supersonic nozzle and collected on a metallic foil. The extraction efficiency was measured for different implantation rates and beam degrader thicknesses and compared with the experimental stopping efficiency in the gas cell.
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