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Browsing by Author "Simpson, BRS"

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  • Cassette, P; Ahn, GH; Alzitzoglou, T; Aubineau-Laniece, I; Bochud, F; Torano, EG; Carles, AG; Malonda, AG; Kossert, K; Lee, KB; Laedermann, JP; Simpson, BRS; Van Wyngaardt, WM; Zimmerman, BE (Pergamon-Elsevier Science Ltd, 2006-10)
    The CIEMAT/NIST and TDCR methods in liquid scintillation counting, initially developed for the activity standardization of pure beta radionuclides, have been extended to the standardization of electron capture and beta–gamma ...
  • Simpson, BRS; Morris, WM (Pergamon-Elsevier Science Ltd, 2004-02)
    The measurement of Mn-54 and Zn-65 by liquid scintillation coincidence counting results in low detection efficiencies. The activity obtained from the extrapolation of efficiency data can therefore become problematic if ...
  • Razdolescu, AC; Broda, R; Cassette, P; Simpson, BRS; Van Wyngaardt, WM (Pergamon-Elsevier Science Ltd, 2006-10)
    The paper summarizes the IFIN-HH triple coincidence liquid scintillation counter used for the implementation of the TDCR method. The electronic unit was recently extended to record the three individual double coincidence ...
  • Morris, WM; Simpson, BRS (Pergamon-Elsevier Science Ltd, 2004-02)
    Radioactive water standards prepared in Marinelli beakers can pose a problem due to potential leakage that can both compromise the standard and present a safety hazard. These difficulties can be circumvented by solidifying ...
  • Simpson, BRS (Pergamon-Elsevier Science Ltd, 2002-01)
    South Africa's national radioactivity measurement standard is maintained at a satellite laboratory in Cape Town by the National Metrology Laboratory (NML) of the Council-for Scientific and Industrial Research. Standardizations ...
  • Van Wyngaardt, WM; Simpson, BRS (Elsevier Science BV, 2006-08-01)
    A simple counting technique to measure mixtures of two pure beta-emitting radionuclides is described. The method is based on elements of two liquid scintillation techniques that are widely used to measure single-radionuclide ...
  • Simpson, BRS; Morris, WM (Pergamon-Elsevier Science Ltd, 2004-02)
    The activity of the pure beta-emitter phosphorus-33 (P-33) has been directly determined by the triple-to-double coincidence ratio (TDCR) efficiency calculation technique, thus extending the number of radionuclides that ...