Background reduction at DTU Nutech surface gamma laboratory.


Technical University of Denmark, Center for Nuclear Technologies, Frederiksborgvej 399, 4000, Roskilde, Denmark. Electronic address: [Email]


Sources of background and background variation in a BEGe type HPGe detector located in a surface laboratory were identified. Different strategies for background reduction were applied. A cosmic veto was installed, and optimised using a digital acquisition system in list-mode with time-stamped data. This resulted in the reduction of total background by a factor of 1.4. Thermal and fast neutron fluxes were also calculated. The radon induced background component and its variation were significantly reduced.


Anticoincidence,Cosmic veto,Gamma spectrometry,HPGe detector,Low-level,