Rapid gamma spectrometric analysis of soil samples after radioactive fallout using a "conjugate view" technique.
J Environ Radioact
; 177: 250-255, 2017 Oct.
Article
in En
| MEDLINE
| ID: mdl-28719852
ABSTRACT
A method for fast determination of the activity in soil samples by measuring a fresh soil core sample from both ends with an HPGe-detector is proposed. The method was tested by simulations, as well as by measurements on spiked soil samples. Both simulations and measurements showed that the geometrical mean of the count rates when the sample is measured twice, with the bottom and the top end, respectively, facing the detector closely resembles the count rate from a measurement on a homogenized sample. Therefore, an efficiency calibration for homogenized samples could be used even if the activity is highly inhomogeneous in the soil core, as is the case with fresh fallout. It was also shown that by studying the ratio between the two measurements, a rough estimation of the extent of penetration of the radionuclide in the soil can be found. This will enhance the possibility to make rapid estimations of the soil inventory by field gamma spectrometry.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Radioactive Fallout
/
Soil Pollutants, Radioactive
/
Radiation Monitoring
Language:
En
Journal:
J Environ Radioact
Journal subject:
SAUDE AMBIENTAL
Year:
2017
Document type:
Article