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Title: Background model for the Majorana Demonstrator

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.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [5] ;  [4] ;  [6] ;  [7] ;  [8] ;  [9] ;  [10] ;  [2] ;  [10] ;  [11] ;  [1] ;  [1] ;  [12] ;  [7] ;  [13] ;  [6] more »;  [3] ;  [14] ;  [14] ;  [4] ;  [14] ;  [6] ;  [4] ;  [1] ;  [15] ;  [7] ;  [16] ;  [13] ;  [2] ;  [14] ;  [3] ;  [10] ;  [14] ;  [17] ;  [18] ;  [7] ;  [5] ;  [3] ;  [3] ;  [1] ;  [11] ;  [19] ;  [14] ;  [14] ;  [9] ;  [14] ;  [2] ;  [13] ;  [3] ;  [14] ;  [3] ;  [11] ;  [17] ;  [9] ;  [4] ;  [14] ;  [6] ;  [1] ;  [20] ;  [6] ;  [1] ;  [14] ;  [13] ;  [7] ;  [14] ;  [9] ;  [10] ;  [21] ;  [7] ;  [8] ;  [14] ;  [4] ;  [12] ;  [2] ;  [14] ;  [4] ;  [22] ;  [23] ;  [6] ;  [7] ;  [11] ;  [4] ;  [5] « less
  1. Univ. of Washington, Seattle, WA (United States)
  2. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  3. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  5. Inst. of Theoretical and Experimental Physics (ITEP), Moscow (Russian Federation)
  6. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  7. Joint Inst. for Nuclear Research (JINR), Dubna (Russian Federation)
  8. Duke Univ., Durham, NC (United States); Trangle Universities Nuclear Laboratory, Durham, NC (United States)
  9. Univ. of South Dakota, Vermillion, SD (United States)
  10. South Dakota School of Mines and Technology, Rapid City, SD (United States)
  11. North Carolina State Univ., Raleigh, NC (United States); Trangle Universities Nuclear Laboratory, Durham, NC (United States)
  12. Univ. of Tennessee, Knoxville, TN (United States)
  13. Osaka Univ. (Japan). Research Center for Nuclear Physics and Dept. of Physics
  14. Univ. of North Carolina, Chapel Hill, NC (United States); Trangle Universities Nuclear Laboratory, Durham, NC (United States)
  15. Univ. of South Carolina, Columbia, SC (United States)
  16. Univ. of Alberta, Edmonton, AB (Canada)
  17. Black Hills State Univ., Spearfish, SD (United States)
  18. Tennessee Technological Univ., Cookeville, TN (United States)
  19. Shanghai Jiao Tong Univ. (China)
  20. Univ. of Tenneessee, Knoxville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  21. Black Hills State Univ., Spearfish, SD (United States); Trangle Universities Nuclear Laboratory, Durham, NC (United States)
  22. 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)
  23. Univ. of North Carolina, Chapel Hill, NC (United States)
Publication Date:
OSTI Identifier:
1202398
Grant/Contract Number:
AC05-76RL01830
Type:
Accepted Manuscript
Journal Name:
Physics Procedia
Additional Journal Information:
Journal Volume: 61; Journal Issue: C; Conference: 13th International Conference on Topics in Astroparticle and Underground Physics, TAUP 2013, Monterey, CA (United States), 8-13 Sep 2013; Journal ID: ISSN 1875-3892
Publisher:
Elsevier
Research Org:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS neutrinoless double beta decay; germanium detector; majorana