Physics – Nuclear Physics
Scientific paper
Oct 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aps..dnp.da057m&link_type=abstract
American Physical Society, 2008 Annual Meeting of the Division of Nuclear Physics, October 23-26, 2008, abstract #DA.057
Physics
Nuclear Physics
Scientific paper
The next generation of experiments in particle astrophysics will require extremely low and well-known backgrounds. This requires performing experiments with low activity materials and going underground to escape the ubiquitous cosmic-ray background. Current radiometric assays using low background HPGe detectors at the recently established Kimballton Underground Research Facility for Low Background Counting (KURF LBC ) examine the bulk activity of materials that will be used in direct dark matter searches such as Mini-CLEAN and in the search for 0νββ by the MAJORANA Collaboration. Finding the bulk activity from the spectra of a measured sample is involved. To account for branching ratios, geometry effects, and attenuation in the sample and non-active parts of the detector-- Monte Carlo calculations of peak acceptances were made using the MaGe/GEANT4 simulation package in addition to modeling the affect of energy resolution on peak height to continuum ratio from fitted data.
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