MEASUREMENT OF RADON EMANATIONS

FROM PHOSPHATES AND conversion factor

USING POLYCARBONATE DETECTORS

M. Fahad*

Laboratoire de Physique et Techniques Nucléaires

Faculté des Sciences, 24000 El Jadida - Maroc

* Corresponding author. E-mail : fahad@ucd.ac.ma

Received 19 January 2001

Abstract

Radon is considered as the main source of man’s exposure to ionizing radiation. It is a naturally occurring radioactive gas, its concentration in air depends mainly on the presence of Uranium or Thorium in the subsoil of the earth. The present study aims to demonstrate the possibility to use Solid State Nuclear Track Detectors (SSNTD) to evaluate radon concentration, particularly emanating from phosphates, and the conversion factor; allows to estimate from the radon mass activity the value of the Uranium concentration C = 2,7 ± 0,5 [ppm]/[Bq/Kg]. The choice of the CR-39 SSNTD has been dictated by its sensitivity to all energies of alpha particles involved in measuring radon and its daughters.

Keywords : Radon; Uranium; Phosphate; SSNTD; CR-39; Calibration factor; Conversion factor.

© 2015