Background reduction at DTU Nutech surface gamma laboratory

Nikola Marković; Per Roos; Sven Poul Nielsen; Xiao Xiao Cai

doi:10.1016/j.apradiso.2019.05.014

Background reduction at DTU Nutech surface gamma laboratory

Appl Radiat Isot. 2019 Sep:151:30-38. doi: 10.1016/j.apradiso.2019.05.014. Epub 2019 May 23.

Authors

Nikola Marković¹, Per Roos², Sven Poul Nielsen², Xiao Xiao Cai²

Affiliations

¹ Technical University of Denmark, Center for Nuclear Technologies, Frederiksborgvej 399, 4000, Roskilde, Denmark. Electronic address: nikola.markovic@gu.se.
² Technical University of Denmark, Center for Nuclear Technologies, Frederiksborgvej 399, 4000, Roskilde, Denmark.

PMID: 31158703
DOI: 10.1016/j.apradiso.2019.05.014

Abstract

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.

Keywords: Anticoincidence; Cosmic veto; Gamma spectrometry; HPGe detector; Low-level.

MeSH terms

Air Pollutants, Radioactive / analysis*
Radiation Monitoring / methods*
Radon / analysis*
Spectrometry, Gamma / methods*

Substances

Air Pollutants, Radioactive
Radon