Temperature calibration of Pico-Rad detectors for radon measurement.
A simple mathematical equation linking the activity of adsorbed radon in the vials to the time and temperature of its exposure is discussed. The calibration coefficient--Ks, defined as activity measured in cpm after saturation time, corresponding to radon air concentration of 1 Bq m-3, was determined for four temperatures: 284, 291, 294 and 298 K. A linear relationship of ln Ks values versus T-1 was found. The relatively high difference in Ks values: 2.12 and 1.24 cpm/Bq m-3 for the temperatures of 284 and 298 K, respectively, was observed. It indicates that temperature fluctuations during Pico-Rad vial exposure may lead to erroneous results if the constant average temperature of exposure is introduced into a commonly used computer programme for calculating Rn concentration.
Bem
H
H
Institute of Applied Radiation Chemistry, Technical University of Lódź, Poland.
Bem
E M
EM
Chruścielewski
W
W
Skalski
H
H
D000396:Air Pollutants, Radioactive / Q000032:analysis*; D016902:Air Pollution, Indoor / Q000032:analysis*; D002138:Calibration; D006801:Humans; D015233:Models, Statistical; D011874:Radiometry / Q000295:instrumentation*; D011886:Radon / Q000032:analysis*; D013696:Temperature
D000396:Air Pollutants, Radioactive; D011886:Radon