Speaker
Description
Coincidence gamma-ray spectrometers are promising detector systems in numerous circumstances, thanks to their improved minimum detectable activity (MDA) compared to conventional single-detector systems. In the field of radionuclide monitoring, coincidence gamma-ray spectrometers have the potential to lower detection thresholds and improve the ability to verify compliance with treaties that ban the detonation of nuclear weapons, such as the Comprehensive Nuclear-Test-Ban Treaty (CTBT). In the CoSpeR collaboration between Uppsala University and the Swedish Defence Research Agency (FOI), the design of coincidence gamma-ray spectrometers is optimized to achieve low MDAs of key CTBT-relevant nuclides that emit gamma-rays in coincidence. Simulations with the Geant4 toolkit are used to evaluate the MDA of detector concepts and are used for parametric detector design studies. This presentation will discuss the simulation approach behind the parametric design study, show preliminary results, and describe the future path towards high-sensitivity gamma-ray detector systems.