The Majorana Ge-76 Double-Beta Decay Project
The Majorana Collaboration: C.E. Aalseth, D. Anderson, F.T. Avignone, III, A. Barabash, T.W. Bowyer, R.L. Brodzinski, V. Brudanin, J.I. Collar,, P.J. Doe, S. Egorov, S.R. Elliott, H.A. Farach, R. Gaitskell, D. Jordan, O., Kochetov, S. Konovalov, R. Kouzes, H.S. Miley, W.K. Pitts
TL;DR
The Majorana Experiment aims to detect neutrinoless double-beta decay in Ge-76 using a large array of enriched germanium detectors with advanced segmentation and pulse-shape analysis, targeting unprecedented sensitivity.
Contribution
It introduces a next-generation detector array with high granularity and segmentation for improved sensitivity in Ge-76 double-beta decay searches.
Findings
Predicted half-life sensitivity of 4.2×10^27 years
Effective neutrino mass limit < 0.02-0.07 eV
Utilizes 500 kg of enriched germanium detectors
Abstract
The Majorana Experiment is a next-generation Ge-76 double-beta decay search. It will employ 500 kg of Ge, isotopically enriched to 86% in Ge-76, in the form of 200 detectors in a close-packed array for high granularity. Each crystal will be electronically segmented, with each region fitted with pulse-shape analysis electronics. A half-life sensitivity is predicted of 4.2e27 y or <m_nu> < 0.02-0.07 eV, depending on the nuclear matrix elements used to interpret the data.
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Taxonomy
TopicsScientific Research and Discoveries · Particle Detector Development and Performance · Particle physics theoretical and experimental studies