Publications (2)0 Total impact
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MAJORANA Collaboration,
A. G. Schubert,
E. Aguayo,
F. T. Avignone III,
H. O. Back,
A. S. Barabash,
M. Bergevin,
F. E. Bertrand,
M. Boswell,
V. Brudanin, [......],
R. L. Varner,
K. Vetter,
K. Vorren,
J. F. Wilkerson,
B. A. Wolfe,
E. Yakushev,
A. R. Young,
C. ?H. Yu,
V. Yumatov,
C. Zhan
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ABSTRACT: The observation of neutrinoless double-beta decay would determine whether the
neutrino is a Majorana particle and provide information on the absolute scale
of neutrino mass. The MAJORANA Collaboration is constructing the DEMONSTRATOR,
an array of germanium detectors, to search for neutrinoless double-beta decay
of 76-Ge. The DEMONSTRATOR will contain 40 kg of germanium; up to 30 kg will be
enriched to 86% in 76-Ge. The DEMONSTRATOR will be deployed deep underground in
an ultra-low-background shielded environment. Operation of the DEMONSTRATOR
aims to determine whether a future tonne-scale germanium experiment can achieve
a background goal of one count per tonne-year in a 4-keV region of interest
around the 76-Ge neutrinoless double-beta decay Q-value of 2039 keV.
09/2011;
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MAJORANA Collaboration,
C. E. Aalseth,
M. Amman,
F. T. Avignone III,
H. O. Back,
A. S. Barabash,
P. S. Barbeau,
M. Bergevin,
F. E. Bertrand,
M. Boswell, [......],
J. F. Wilkerson,
B. A. Wolfe,
W Xiang,
E. Yakushev,
H. Yaver,
A. R. Young,
C. -H. Yu,
V. Yumatov,
C Zhang,
S. Zimmerman
[show abstract]
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ABSTRACT: The MAJORANA Collaboration is building the MAJORANA DEMONSTRATOR, a 60 kg
array of high purity germanium detectors housed in an ultra-low background
shield at the Sanford Underground Laboratory in Lead, SD. The MAJORANA
DEMONSTRATOR will search for neutrinoless double-beta decay of 76Ge while
demonstrating the feasibility of a tonne-scale experiment. It may also carry
out a dark matter search in the 1-10 GeV/c^2 mass range. We have found that
customized Broad Energy Germanium (BEGe) detectors produced by Canberra have
several desirable features for a neutrinoless double-beta decay experiment,
including low electronic noise, excellent pulse shape analysis capabilities,
and simple fabrication. We have deployed a customized BEGe, the MAJORANA
Low-Background BEGe at Kimballton (MALBEK), in a low-background cryostat and
shield at the Kimballton Underground Research Facility in Virginia. This paper
will focus on the detector characteristics and measurements that can be
performed with such a radiation detector in a low-background environment.
07/2010;
