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Related Experiment Videos

Standardization of 89Sr.

Anamaria Cristina Razdolescu1, Maria Sahagia, Ph Cassette

  • 1National Institute of R&D for Physics and Nuclear Engineering Horia Hulubei, IFIN-HH, Bucharest, Romania.

Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine
|February 13, 2002
PubMed
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Two methods standardized strontium-59 (59Sr) beta-emitter solutions for international activity comparisons. Both triple to double coincidence ratio (TDCR) and efficiency tracer techniques yielded consistent results, ensuring accurate radioactivity measurements.

Area of Science:

  • Radiochemistry
  • Nuclear Physics
  • Metrology

Background:

  • Accurate standardization of pure beta-emitters is crucial for international radioactivity measurements.
  • The 2000 BIPM comparison necessitated reliable activity concentration data for 59Sr.

Purpose of the Study:

  • To standardize a 59Sr solution using two independent methods.
  • To compare the results obtained from scintillation counting and efficiency tracer techniques.
  • To ensure the accuracy of 59Sr activity measurements for international comparisons.

Main Methods:

  • Scintillation counting utilizing the triple to double coincidence ratio (TDCR) technique with an improved three-detector system and MAC-3 module.
  • Efficiency tracer technique employing a 60Co standard and a 4π beta-gamma-coincidence system.

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Main Results:

  • The TDCR method yielded an activity concentration of 26.09 ± 0.21 kBq g⁻¹.
  • The efficiency tracer technique resulted in an activity concentration of 26.58 ± 0.28 kBq g⁻¹.
  • Both results demonstrated agreement within their combined uncertainties.

Conclusions:

  • The two distinct methods provide consistent and reliable standardization of 59Sr.
  • The validated activity concentration is suitable for use in international comparisons.
  • The study highlights the successful application of advanced techniques in radioactivity metrology.