CALIBRATION OF LR-115 for uranium estimation and Radon measurements from phosphate and coal

M. Fahad*

Laboratoire de Physique et Techniques Nucléaires

Faculté des Sciences, 24000 El Jadida - Maroc

* Corresponding author. E-mail :

Received 12 February 2000; revised version accepted 13 April 2001


The present study aims to demonstrate the possibility to use only solid state nuclear tracks detectors (SSNTDs) and an a-source for the calculation of the calibration factor of LR-115 in different samples : solid, liquid or gaseous. The calibration factor is a linear function of the removed thickness of LR-115 sensitive layer, it allows the transformation of the observed tracks density in an alpha volume activity. The method has been used for the evaluation of the content 238U in samples of phosphate as well as the rate of 222Rn emanating from the phosphate and coal.

Keywords  : LR-115; Calibration factor; CR39; SSNTDs; Phosphate; Radon; Coal radon; Uranium measurements.

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