Title :
A dip detector for in situ measuring of Cs-137 specific soil activity profiles
Author :
Potapov, V.N. ; Ivanov, O.P. ; Chirkin, V.M. ; Ignatov, S.M.
Author_Institution :
Russian Res. Centre, Kurchatov Inst., Moscow, Russia
fDate :
8/1/2001 12:00:00 AM
Abstract :
A field method for measurement of Cs-137 contamination depth profiles is described. The method is based on the use of a collimated dip detector created as a gamma-ray probe: CsI(Tl) scintillating crystal + PIN photodiode + front-end electronics. The presented method allows determination of specific activity distribution with vertical spatial resolution of 5 cm. Exposure time for one point in the distribution profile is less than 180 s if the level of specific activity is more than 50 Bq/kg. This method may be applied for efficient and quick inspection of a contaminated river´s flood planes in areas with leakage of radioactive wastes. Application of the method for such a task gives an effective solution to obtain qualitative and quantitative characteristics of contamination
Keywords :
caesium; gamma-ray detection; pollution measurement; radioactive pollution; soil; solid scintillation detectors; 137Cs specific soil activity profiles; Cs; CsI(Tl) scintillating crystal; CsI:Tl; PIN photodiode; collimated dip detector; contaminated river; contamination depth profiles; flood planes; front-end electronics; gamma-ray probe; Collimators; Contamination; Gamma ray detection; Gamma ray detectors; Inspection; PIN photodiodes; Pollution measurement; Probes; Soil measurements; Spatial resolution;
Journal_Title :
Nuclear Science, IEEE Transactions on
