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A new thoron atmosphere reference measurement system.

B Sabot1, S Pierre1, N Michielsen2

  • 1CEA, LIST, Laboratoire National Henri Becquerel (LNE-LNHB), Bât 602 PC111, CEA Saclay, 91191 Gif-Sur-Yvette, Cedex, France.

Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine
|December 25, 2015
PubMed
Summary
This summary is machine-generated.

A new portable thoron ((220)Rn) measurement system was developed for direct air monitoring. This validated system enhances thoron progeny detection and will calibrate reference atmospheres.

Keywords:
Primary standardRadonRn-220Rn-222Thoron

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Area of Science:

  • Environmental radioactivity measurement
  • Radon and thoron detection technologies

Background:

  • Accurate measurement of thoron ((220)Rn) and its progeny is crucial for environmental monitoring and radiation protection.
  • Existing methods may have limitations in direct measurement or spectrum quality of thoron decay products.

Purpose of the Study:

  • To develop and validate a new, portable measurement system for reference thoron ((220)Rn) in air.
  • To improve the detection and spectral analysis of thoron decay products.
  • To establish a reference instrument for calibrating thoron activity concentrations.

Main Methods:

  • Development of a portable measurement system utilizing a reference volume and an alpha detector.
  • Application of an electric field to enhance the collection efficiency of thoron decay products on the detector.
  • Validation of the system using established radon ((222)Rn) primary standards.

Main Results:

  • Successful development of a portable thoron ((220)Rn) measurement system capable of direct measurement at atmospheric pressure.
  • Improved spectrum quality for thoron progenies due to the applied electric field.
  • Validation of the system's performance through comparison with radon primary standards.

Conclusions:

  • The new thoron ((220)Rn) measurement system provides a reliable and portable solution for reference air measurements.
  • The system's ability to directly measure thoron and its decay products, coupled with enhanced spectrum quality, makes it suitable for applications like the BACCARA chamber.
  • This instrument will serve as a key reference for calibrating thoron activity concentrations at IRSN.