Determination of the long-term equilibrium factor indoors by means of makrofol track-etched detectors

Baixeras, C. and Amgarou, K. and Font, Ll. and Domingo, C. and Fernandez, F. (1999) Determination of the long-term equilibrium factor indoors by means of makrofol track-etched detectors. Il nuovo cimento C, 22 C (3-4). pp. 325-330. ISSN 1826-9885

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From the point of view of radioprotection, it is worthwhile to determine the long-term equilibrium factor indoors to better ascertain the dose which population is exposed to. The method used in our laboratory to obtain long-term equilibrium factors indoors is based on simultaneous measurements of 222Rn and 214Po in air by using a detector with two Makrofol-ED (polycarbonate) foils covered with aluminised mylar: one placed inside a diffusion chamber, and the other one in direct contact with air, allowing, respectively, the measurement of 222Rn and 214Po activity concentrations. The equilibrium factor is estimated from the ratio of these two concentrations. The detector has been calibrated at the radon chamber of the National Radiological Protection Board (NRPB), Chilton, UK. Sensitivity values of e 04( 0.8560.04) (tr Qcm22 ) /( kBq Qm23 Qh ) and e 44(3.060.2) (trQcm22 ) /( kBq Q m23 Qh ) have been obtained from the calibration for the measurement of 222Rn and 214Po, respectively. A radon activity concentration of 44 BqQm23 and a mean equilibrium factor of 0.42 have been obtained in a pilot application indoors.

Item Type: Article
Additional Information: Paper presented at the “Fourth International Conference on Rare Gas Geochemistry”, Rome, October 8-10, 1997.
Uncontrolled Keywords: Radiation detectors; surface cleaning, etching, patterning; biological effects of electromagnetic and particle radiations; conference proceedings
Subjects: 500 Scienze naturali e Matematica > 550 Scienze della Terra
Depositing User: Marina Spanti
Date Deposited: 10 Oct 2019 07:07
Last Modified: 10 Oct 2019 07:07

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