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Standardisation of 89Sr using three different methods.

T Altzitzoglou1, B Denecke, L Johansson

  • 1Institute for Reference Materials and Measurements, Joint Research Centre, European Commission, Geel, Belgium. timotheos.altzitzoglou@irmm.jrc.be

Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine
|February 13, 2002
PubMed
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Three methods standardized Strontium-89 (89Sr) activity concentration and determined its half-life. Results confirmed 89Sr concentration at 26.21 ± 0.08 kBq g−1 and a new half-life of 50.61 ± 0.05 days.

Area of Science:

  • Nuclear Physics
  • Metrology
  • Radiochemistry

Background:

  • Accurate standardization of radionuclides is crucial for international comparisons and metrology.
  • Strontium-89 (89Sr) is a beta-emitting radionuclide with applications in various fields.
  • Previous measurements of 89Sr properties may require updated values.

Purpose of the Study:

  • To standardize the activity concentration of a 89Sr solution using independent methods.
  • To determine a new, precise value for the half-life of 89Sr.
  • To compare different measurement techniques for radionuclide standardization.

Main Methods:

  • Activity concentration standardization using 4pi liquid scintillation (LS) spectrometry with efficiency tracing.
  • Direct activity measurement with a windowless 4pi CsI(Tl)-sandwich spectrometer.

Related Experiment Videos

  • Direct activity measurement with a 4pi pressurised gas proportional counter.
  • Preparation of quantitative solid point-like sources and impurity correction.

    • Main Results:

    • The activity concentration of the 89Sr solution was determined to be 26.21 ± 0.08 kBq g−1.
    • A new half-life value for 89Sr was determined to be 50.61 ± 0.05 days from LS measurements.
    • Results from the three independent methods showed good agreement after corrections for impurities.

    Conclusions:

    • The international comparison successfully standardized the 89Sr solution using multiple techniques.
    • The determined activity concentration and half-life provide updated reference values for 89Sr.
    • The study highlights the advantages and disadvantages of each measurement method for radionuclide standardization.