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Related Experiment Videos

On low-level tritium measurements with LSC Quantulus

Schafer1, Hebert, Zeiske

  • 1VKTA Rossendorf e.V., Dresden, Germany. i.schaefer@vkta-rossendorf.de

Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine
|July 6, 2000
PubMed
Summary

Low-level tritium (3H) measurements using a liquid scintillation counter (LSC) showed significantly lower background rates in an underground laboratory compared to an above-ground facility. This reduction is attributed to cosmic ray shielding, despite radon interference.

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Reply from the authors

Kidney international·2001

Area of Science:

  • Radiochemistry
  • Environmental Science
  • Analytical Chemistry

Background:

  • Low-level radioactivity measurements are crucial for environmental monitoring and research.
  • Liquid Scintillation Counting (LSC) is a common technique for detecting low-energy beta emitters like tritium (3H).
  • Environmental factors, such as cosmic radiation and naturally occurring radioactive materials, can significantly impact measurement sensitivity.

Purpose of the Study:

  • To evaluate the performance of the "Quantulus" liquid scintillation counter (LSC) for low-level tritium (3H) measurements.
  • To compare background count rates in an underground laboratory versus an above-ground laboratory.
  • To investigate the influence of scintillation cocktails, vial types, and environmental factors on measurement accuracy.

Main Methods:

Related Experiment Videos

  • Low-level tritium (3H) measurements were conducted using a "Quantulus" liquid scintillation counter (LSC).
  • Experiments involved using various scintillation cocktails and counting vials.
  • Measurements were performed in both an underground laboratory (110 m water equivalent) and an above-ground laboratory (0 m water equivalent).

Main Results:

  • The underground laboratory exhibited a two times lower effective background count rate in the 3H-window compared to the above-ground laboratory.
  • Cosmic ray shielding in the underground facility significantly reduced background radiation.
  • Radon-220 daughter products (e.g., 212Pb) in the underground laboratory air caused luminescence interference, which was accounted for in the analysis.

Conclusions:

  • Underground laboratories provide superior conditions for sensitive low-level tritium (3H) measurements due to reduced cosmic ray background.
  • Effective background reduction strategies are necessary to mitigate interference from environmental factors like radon.
  • The "Quantulus" LSC is suitable for low-level tritium detection, with performance optimized in shielded environments.