The Majorana Neutrinoless Double-Beta Decay Experiment

Details The Majorana Neutrinoless Double-Beta Decay Experiment The Majorana Neutrinoless Double-Beta Decay Experiment

2004-05-06

arxiv.org/abs/hep-ex/0405008v1

Phys.Atom.Nucl.67:2002-2010,2004; Yad.Fiz.67:2025-2032,2004

Physics

High Energy Physics

High Energy Physics - Experiment

10 pages, 7 figures

Scientific paper

10.1134/1.1825519

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 electro-formation 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 of Majorana, a half-life sensitivity of ~4x10^27 y (neutrinoless) is predicted. This corresponds to an effective Majorana mass of the electron neutrino of ~0.03-0.04 eV, according to recent QRPA and RQRPA matrix element calculations.

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