Title: Preparation of Drop-Deposited Quantitative Uranium Sources with Low Self-Absorption
Authors: VAN AMMEL RafEYKENS SILKEEYKENS RogerPOMME Stefaan
Citation: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT vol. 652 no. 1 p. 76-78
Publisher: ELSEVIER SCIENCE BV
Publication Year: 2011
JRC Publication N°: JRC59255
ISSN: 0168-9002
URI: http://www.sciencedirect.com/science/article/pii/S0168900210020802
http://publications.jrc.ec.europa.eu/repository/handle/JRC59255
DOI: 10.1016/j.nima.2010.09.056
Type: Contributions to Conferences
Abstract: A source preparation procedure was optimised for 235U sources of about 1 mg or 100 Bq, to be standardised for their activity concentrations by α-particle counting at a defined solid angle. The aim was to obtain quantitative sources having a thin, homogeneous active layer with low self-absorption of the emitted α-particles. The procedure involves spraying the wetting and seeding agent in a circular shape onto a glass or stainless steel substrate, quantitative drop deposition of active solution onto the sprayed area by the pycnometer method and fast drying of the source on a heating plate. The fraction of heavily scattered and self-absorbed α-particles could be reduced to 0.05–0.1% for a majority of the sources.
JRC Institute:Institute for Reference Materials and Measurements

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