Calibration of the angular energy efficiency of an in situ spectrometer based on a LaBr3(Ce) detector
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The angular response of an environmental γ-spectrometer equipped with a LaBr3(Ce) detector is characterized. The efficiency calibration was performed via mathematical and experimental methods and yielded three-dimensional maps of angle, energy, and efficiency. The applicability and limitation of the mathematical calibration were evaluated by relative uncertainty propagation. The uncertainty is in the range of 65 % for γ-rays with energies below 250 keV, up to 35 % in the range 250–550 keV, and approximately 10 % for other energies. These are acceptable levels of accuracy for environmental monitoring.
KeywordsAngular efficiency Environmental monitoring LaBr3(Ce) detector Numerical modeling
This work was performed within the EUROfusion Consortium and received funding from the European Union’s Horizon 2020 research and innovation program, under grant agreement 633053. The views and opinions expressed herein do not reflect those of the European Commission. This project (No.: SP/J/6/143339/11) was supported by a grant from the National Centre for Research and Development (NCBiR) entitled ‘Technologies Supporting Development of Safe Nuclear Power Engineering: Development of nuclear safety and radiological protection methods for nuclear power engineering current and future needs’ (research network leader—Central Laboratory for Radiological Protection). The financial support of the NCBiR is gratefully acknowledged.
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