Speaker
Dr
Marcel Ohera
(EnviMO Brno Czech Republic)
Description
The portable PGIS-128 gamma-ray spectrometer, produced by Pico Envirotec, Inc., Canada, was originally designed for the geological purposes and the determination of K, U and Th concentrations in soil and rocks. The device is fully calibrated for K, U and Th. However, its functions have been extended, and now the gamma-ray spectrometer is available with the dose rate function (in nGy/h) and the Cs-137 window (in cps) measured in real time. Due to one-second sampling and real-time processing, now PGIS-128 can be used for fast and precise environmental monitoring at relatively large environmental areas with on-line mapping on the HHC display and/or the post-mapping. To calibrate the PGIS gamma-ray spectrometer and to convert the count rates (cps) in the Cs-137 window to the surface activity of Cs-137 (in kBq/m2), the Beck’s method or the standard stripping method can be used. This contribution is focused on the Beck’s method. Some results and the measurement conditions are also presented.
Primary author
Prof.
Petr Sládek
(NBC Defence Institute Vyškov, University of Defence, Czech Republic)
Co-authors
Dr
Josef Pavlík
(NBC Defence Institute Vyškov, University of Defence, Czech Republic)
Dr
Marcel Ohera
(EnviMO Brno Czech Republic)
