Development of a simultaneous evaluation method of radioactivity in soil and dose rate using CeBr and SrI(Eu) scintillation detectors for environmental monitoring

環境モニタリングにおけるCeBr及びSrI(Eu)シンチレーション検出器を用いる放射能濃度及び線量率の同時計測法の開発

古渡 意彦; 谷村 嘉彦   ; Kessler, P.*; Neumaier, S.*; Roettger, A.*

Kowatari, Munehiko; Tanimura, Yoshihiko; Kessler, P.*; Neumaier, S.*; Roettger, A.*

The simultaneous evaluation of dose rate and radioactivity using newly developed scintillation detectors, i.e. CeBr and SrI(Eu) was investigated for environmental radiation measurement in emergency situation. Energy dependence and linearity tests of both detectors were conducted in a low background laboratory operated by the German metrological institute and found to be applicable to environmental monitoring purposes. As a result of environmental ray measurements in normal condition, evaluated air kerma rate and radioactivity in/on soil for Cs, Cs and K seemed consistent. Results also support that methods developed in the study are reliable and applicable to the environmental radiation measurement.