Title :
A dip detector for in situ measuring of 137Cs specific soil activity profiles
Author :
Potapov, V.N. ; Ivanov, O.P. ; Chirkin, V.M. ; Ignatov, S.M.
Author_Institution :
Kurchatov (I.V.) Inst. of Atomic Energy, Moscow, Russia
Abstract :
Field method for measurement of Cs-137 contamination depth profile is described. 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 technique of measurements allows determination of specific activity distribution with spatial distribution of 5 cm. Exposure time for one point in distribution profile is less than 180 sec if levels of specific activity are more than 50 Bq/kg. This method may be allied for efficient and quick inspection of contaminated river´s flood planes in areas with leakage of radioactive wastes. Application of method for such task gives effective solution to obtain qualitative and quantitative characteristics of contamination
Keywords :
caesium; gamma-ray detection; geophysical techniques; nuclear electronics; pollution measurement; radioactive pollution; radioisotopes; soil; solid scintillation detectors; 180 s; 137Cs specific soil activity profiles; Cs; Cs-137 contamination depth profile; CsI(Tl) scintillating crystal; PIN photodiode; collimated dip detector; contaminated river flood planes; dip detector; front end electronics; gamma-ray probe; in situ measuring; radioactive contamination; radioactive wastes; spatial distribution; Collimators; Contamination; Detectors; Electromagnetic wave absorption; Electronics packaging; Floods; Pollution measurement; Probes; Rivers; Soil measurements;
Conference_Titel :
Nuclear Science Symposium Conference Record, 2000 IEEE
Conference_Location :
Lyon
Print_ISBN :
0-7803-6503-8
DOI :
10.1109/NSSMIC.2000.949216
