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|Title:||Preparation of Drop-Deposited Quantitative Uranium Sources with Low Self-Absorption|
|Authors:||VAN AMMEL Raf; EYKENS SILKE; EYKENS Roger; POMME 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|
|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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