The majorana neutrinoless double-beta decay experiment |
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| Institution: | (1) The Pacific Northwest National Laboratory, Richland, WA, USA;(2) Department of Physics and Astronomy, University of South Carolina, Columbia, SC, USA;(3) Oak Ridge National Laboratory, Oak Ridge, TN, USA;(4) P-Division, Los Alamos National Laboratory, Los Alamos, NM, USA;(5) Institute of Theoretical and Experimental Physics, Bol’shaya Cheremushkinskaya ul. 25, Moscow, 117259, Russia;(6) Joint Institute for Nuclear Research, Dubna, Moscow oblast, 141980, Russia;(7) Department of Physics and Astronomy, University of Tennessee, Knoxville, TN, USA;(8) Triangle Universities Nuclear Laboratory, Durham, NC, USA;(9) Department of Physics and Astronomy, University of North Carolina, Chapel Hill, NC, USA;(10) Lawrence Berkeley National Laboratory, Berkeley, CA, USA;(11) Center for Cosmology, Enrico Fermi Institute, University of Chicago, Chicago, IL, USA;(12) Department of Physics, University of Washington, Seattle, WA, USA;(13) Research Center for Nuclear Physics, Osaka University, Japan;(14) Department of Physics, Brown University, Providence, RI, USA;(15) Department of Physics, North Carolina State University, Raleigh, NC, USA;(16) Department of Physics, Duke University, Durham, NC, USA;(17) Lawrence Livermore National Laboratory, Livermore, CA, USA;(18) New Mexico State University, Carlsbad, NM, USA |
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| Abstract: | The proposed Majorana double-beta decay experiment is based on an array of segmented intrinsic Ge detectors with a total mass
of 500 kg of Ge isotopically enriched to 86% in 76Ge. A discussion is given of background reduction by material selection, detector segmentation, pulse shape analysis, and
electroformation of copper parts and granularity. Predictions of the experimental sensitivity are given. For an experimental
running time of 10 years over the construction and operation oft he Majorana setup, a sensitivity of T
1/2
0ν
∼4×1027 yr is predicted. This corresponds to 〈mν〉∼0.003−0.004 eV according to recent QRPA and RQRPA matrix element calculations.
From Yadernaya Fizika, Vol. 67, No. 11, 2004, pp. 2025–2032.
Original English Text Copyright ? 2004 by Aalseth, Anderson, Arthur, Avignone III, Baktash, Ball, Barabash, Brodzinski, Brudanin,
Bugg, Champagne, Chan, Cianciolo, Collar, Creswick, Doe, Dunham, Easterday, Efremenko, Egorov, Ejiri, Elliott, Ely, Fallon,
Farach, Gaitskell, Gehman, Grzywacz, Hazma, Hime, Hossbach, Jordan, Kazkaz, Kephart, King III, Kochetov, Konovalov, Kouzes,
Lesko, Macchiavelli, Miley, Mills, Nomachi, Palms, Pitts, Poon, Radford, Reeves, Robertson, Rohm, Rykaczewski, Saborov, Sandukovsky,
Shawley, Stekhanov, Tornow, van de Water, Vetter, Warner, Webb, Wilkerson, Wouters, Young, Yumatov.
This article was submitted by the authors in English.
The authors represent the Majorana Collaboration |
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