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Title: Background Model for the Majorana Demonstrator

Journal Article · · Physics Procedia

The Majorana Collaboration is constructing a prototype system containing 40 kg of HPGe detectors to demonstrate the feasibility and potential of a future tonne-scale experiment to search for neutrinoless double-beta (0v BB) decay in 76Ge. In view of the requirement that the next generation of tonne-scale Ge-based 0vBB-decay experiment be capable of probing the neutrino mass scale in the inverted-hierarchy region, a major goal of theMajorana 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 Geant4 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)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC05-76RL01830
OSTI ID:
1244804
Report Number(s):
PNNL-SA-102048; 830403000
Journal Information:
Physics Procedia, Vol. 61; ISSN 1875-3892
Publisher:
Elsevier
Country of Publication:
United States
Language:
English

References (13)

Neutrino Masses and Mixings: Status and Prospects journal November 2008
Double beta decay, Majorana neutrinos, and neutrino mass journal April 2008
Limits on the Majorana Neutrino Mass in the 0.1 eV Range journal July 1999
IGEX 76 Ge neutrinoless double-beta decay experiment: Prospects for next generation experiments journal May 2002
The IGEX experiment reexamined: A response to the critique of Klapdor-Kleingrothaus, Dietz, and Krivosheina journal October 2004
The Evidence for the Observation of 0νββ Decay: the Identification of 0νββ Events from the full Spectra journal June 2006
Results on Neutrinoless Double- β Decay of Ge 76 from Phase I of the GERDA Experiment journal September 2013
Limit on Neutrinoless β β Decay of Xe 136 from the First Phase of KamLAND-Zen and Comparison with the Positive Claim in Ge 76 journal February 2013
Improved measurement of the 2 ν β β half-life of 136 Xe with the EXO-200 detector journal January 2014
Geant4—a simulation toolkit
  • Agostinelli, S.; Allison, J.; Amako, K.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 506, Issue 3 https://doi.org/10.1016/S0168-9002(03)01368-8
journal July 2003
MaGe-a Geant4-Based Monte Carlo Application Framework for Low-Background Germanium Experiments journal June 2011
0 ν β β -decay nuclear matrix elements with self-consistent short-range correlations journal May 2009
On the Possibilities of Distinguishing Dirac from Majorana Neutrinos text January 1997

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Search for Neutrinoless Double- β Decay in Ge 76 with the Majorana Demonstrator journal March 2018

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