Background model for the Majorana Demonstrator
- Univ. of Washington, Seattle, WA (United States)
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Inst. of Theoretical and Experimental Physics (ITEP), Moscow (Russian Federation)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Joint Inst. for Nuclear Research (JINR), Dubna (Russian Federation)
- Duke Univ., Durham, NC (United States); Trangle Universities Nuclear Laboratory, Durham, NC (United States)
- Univ. of South Dakota, Vermillion, SD (United States)
- South Dakota School of Mines and Technology, Rapid City, SD (United States)
- North Carolina State Univ., Raleigh, NC (United States); Trangle Universities Nuclear Laboratory, Durham, NC (United States)
- Univ. of Tennessee, Knoxville, TN (United States)
- Osaka Univ. (Japan). Research Center for Nuclear Physics and Dept. of Physics
- Univ. of North Carolina, Chapel Hill, NC (United States); Trangle Universities Nuclear Laboratory, Durham, NC (United States)
- Univ. of South Carolina, Columbia, SC (United States)
- Univ. of Alberta, Edmonton, AB (Canada)
- Black Hills State Univ., Spearfish, SD (United States)
- Tennessee Technological Univ., Cookeville, TN (United States)
- Shanghai Jiao Tong Univ. (China)
- Univ. of Tenneessee, Knoxville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Black Hills State Univ., Spearfish, SD (United States); Trangle Universities Nuclear Laboratory, Durham, NC (United States)
- Univ. of North Carolina, Chapel Hill, NC (United States); Trangle Universities Nuclear Laboratory, Durham, NC (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Univ. of North Carolina, Chapel Hill, NC (United States)
The Majorana Collaboration is constructing a system containing 40 kg of HPGe detectors to demonstrate the feasibility and potential of a future tonne-scale experiment capable of probing the neutrino mass scale in the inverted-hierarchy region. To realize this, a major goal of the Majorana Demonstrator is to demonstrate a path forward to achieving a background rate at or below 1 cnt/(ROI-t-y) in the 4 keV region of interest around the Q-value at 2039 keV. This goal is pursued through a combination of a significant reduction of radioactive impurities in construction materials with analytical methods for background rejection, for example using powerful pulse shape analysis techniques profiting from the p-type point contact HPGe detectors technology. The effectiveness of these methods is assessed using simulations of the different background components whose purity levels are constrained from radioassay measurements.
- Research Organization:
- Pacific Northwest National Laboratory (PNNL), Richland, WA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Nuclear Physics (NP)
- Grant/Contract Number:
- AC05-76RL01830; AC02-05CH11231
- OSTI ID:
- 1202398
- Alternate ID(s):
- OSTI ID: 1460326
- Journal Information:
- Physics Procedia, Vol. 61, Issue C; Conference: 13th International Conference on Topics in Astroparticle and Underground Physics, TAUP 2013, Monterey, CA (United States), 8-13 Sep 2013; ISSN 1875-3892
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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Background Model for the Majorana Demonstrator
Background model for the Majorana Demonstrator