2001/06/26 by Yu. G. Zdesenko, Yu.G. Zdesenko, O. A. Ponkratenko +3 · 1 citation
Physics and Astronomy · #Dark Matter and Cosmic Phenomena #Neutrino Physics Research #Particle physics theoretical and experimental studies #nucl-ex
paper · pdf · doi:10.1088/0954-3899/27/10/312
published as J.Phys.G27:2129,2001 · LaTeX, 20 pages, 4 figures
arxiv created 2001/06/26 · openalex publication_date 2001/09/18 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30
The GEM project is designed for the next-generation 2β decay experiments with 76 Ge. One ton of `naked' HP Ge detectors (natural at the first GEM-I phase and enriched in 76 Ge to 86% at the second GEM-II stage) are operating in super-high-purity liquid nitrogen contained in a Cu vacuum cryostat (sphere of diameter 5 m). The latter is placed in the water shield (of dimensions 11 × 11 m 2 ). Monte Carlo simulation evidently shows that the sensitivity of the experiment (in terms of the T 1/2 limit for 0ν2β decay) is ≈10 27 yr with natural HP Ge crystals and ≈10 28 yr with enriched ones. These bounds correspond to the restrictions on the neutrino mass m ν ⩽0.05 eV and m ν ⩽0.015 eV with natural and enriched detectors, respectively. Besides, the GEM-I set-up could advance the current best limits on the existence of neutralinos - as dark matter candidates - by three orders of magnitude, and at the same time would be able to identify unambiguously the dark matter signal by detection of its seasonal modulation.