Development of NANA: A Fast-Scintillator, Coincidence Gamma-ray Array for Radioactive Source Characterisation and Absolute Activity Measurements at the UK National Physical Laboratory

[摘要] A multi-detector modular coincidence gamma-ray spectrometer is being designed and constructed for use at the UK's National Physical Laboratory (NPL) for use in direct measurement and metrological standardisation of nuclear decay activities. In its first generation, the NPL National Nuclear Array (NANA) will consist of twelve individual halide scintillation detectors placed in a high-efficiency geometry around a well-defined central point source position. This brief conference paper provides details of the measured detector module and coincidence energy and timing responses for the LaBr3(Ce) detectors which will be used in the NANA array. Preliminary GEANT4 simulations of the array's full energy peak efficiency and expected gamma-ray coincidence response are also presented.

[发布机构] National Physical Laboratory, Teddington, Middlesexe; TW11 0LW, United Kingdom^1;Department of Physics, University of Surrey, Guildford; GU2 7XH, United Kingdom^2

[效力级别] 工业技术 [学科分类] 工业工程学

[关键词] Activity measurements;Coincidence gammas;Direct measurement;Fast scintillator;Full-energy peak efficiencies;Gamma-ray coincidences;National Physical Laboratory;Radioactive sources