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Updated: Jul 6, 2026

Cryogenic Liquid Jets for High Repetition Rate Discovery Science
Published on: May 9, 2020
Comparative study of two drying techniques used in radioactive source preparation: freeze-drying and evaporation
T Branger1, C Bobin, M-G Iroulart
1CEA/LIST/LNE-Laboratoire National Henri Becquerel, CEA Saclay, 91191 Gif-sur-Yvette Cedex, France. thierry.branger@cea.fr
Abstract:
Quantitative solid sources are used widely in the field of radionuclide metrology. With the aim to improve the detection efficiency for electrons and x-rays, a comparative study between two source drying techniques has been undertaken at LNE-Laboratoire National Henri Becquerel (LNE-LNHB, France). In this paper, freeze-drying using commercial equipment is compared with a system of drying using hot jets of nitrogen developed at Institute for Reference Materials and Measurements (IRMM, Belgium). In order to characterize the influence of self-absorption, the detection efficiencies for (51)Cr sources have been measured by coincidence counting and photon spectrometry.
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