Comparative study of two drying techniques used in radioactive source preparation: Freeze-drying and evaporation using hot dry nitrogen jets

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• 作者：T. Branger ; C. Bobin ; M.-G. Iroulart ; M.-C. Lé ; py ; I. Le Garrè ; res ; S. Morelli ; D. Lacour ; J. Plagnard
• 关键词：Freeze-drying ; Radioactive source preparation
• 刊名：Applied Radiation and Isotopes
• 出版年：2008
• 期刊代码：6_09698043
• 类别：ce
• 出版时间：June-July 2008
• 卷：66
• 期：6-7
• 页码：685-690
• 文件大小：473 K

摘要

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 ⁵¹Cr sources have been measured by coincidence counting and photon spectrometry.