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Related Experiment Videos

Defined solid angle alpha counting at NPL.

Arzu Arinc1, Michael J Parfitt1, John D Keightley1

  • 1National Physical Laboratory, Hampton Road, Teddington, TW11 0LW United Kingdom.

Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine
|December 20, 2015
PubMed
Summary

A new defined solid angle (DSA) alpha counter was developed for precise measurements of alpha-emitting radionuclides and half-lives. Initial tests show promise, though source activity distribution requires further investigation to reduce uncertainty.

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Area of Science:

  • Nuclear Physics
  • Metrology
  • Radiochemistry

Background:

  • Accurate standardization of alpha-emitting radionuclides is crucial for various applications.
  • Existing methods face challenges in achieving high precision for half-life measurements.

Purpose of the Study:

  • To introduce the design and initial performance of a novel defined solid angle (DSA) alpha counter.
  • To enable high-precision radionuclide standardization and half-life measurements.
  • To assess the counter's capability by employing variable source-detector distances.

Main Methods:

  • Design and construction of a new defined solid angle (DSA) alpha counter.
  • Performance evaluation through initial measurements at the National Physical Laboratory, UK.
  • Utilizing three distinct source-detector distances to monitor activity and calculate geometrical efficiencies.
Keywords:
Alpha countingDefined solid angle counting

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Main Results:

  • The defined solid angle (DSA) alpha counter has been successfully designed and initial measurements have been conducted.
  • Promising preliminary results indicate the potential for high-precision measurements.
  • A dominant uncertainty associated with source activity distribution has been identified.

Conclusions:

  • The new defined solid angle (DSA) alpha counter shows significant potential for advancing radionuclide metrology.
  • Further research is necessary to address and minimize uncertainties related to source activity distribution.
  • The instrument is poised to improve accuracy in alpha-emitter standardization and half-life determinations.