A comparative study between the dynamic method and passive can technique of radon exhalation measurements from samples

Appl Radiat Isot. 2015 May:99:172-8. doi: 10.1016/j.apradiso.2015.02.004. Epub 2015 Feb 7.

Abstract

A comparative study has been carried out between the SSNTD based 'can' technique and active monitors based dynamic method using nine different samples, eight of granite and one of phosphogypsum. Besides radon ((222)Rn) exhalation, thoron((220)Rn) exhalation and (226)Ra and (232)Th content were also measured. The results are: (i) presence of significant thoron exhalation from samples and (ii) observation of thoron interference and leak (~0.05h(-1)) from the 'can' in the SSNTD based 'can' technqiue. The study unequivocally demonstrates the presence of intrinsic uncertainty in SSNTD based 'can' technique. Instead, dynamic method offers a more reliable and faster method.

Keywords: Active monitor; Can technique; Dynamic method; Leak; Radon exhalation; SSNTD; Thoron interference.

Publication types

  • Comparative Study
  • Evaluation Study

MeSH terms

  • Air Pollutants, Radioactive / analysis*
  • Air Pollution, Indoor / analysis*
  • Construction Materials / analysis*
  • Materials Testing / methods
  • Radiometry / instrumentation*
  • Radiometry / methods*
  • Radon / analysis*
  • Reproducibility of Results
  • Sensitivity and Specificity
  • Specimen Handling / methods

Substances

  • Air Pollutants, Radioactive
  • Radon