The Gerda Experiment for the Search of Neutrinoless Double Beta Decay

Walter, Michael; Gerda Collaboration

Report/Contribution to a conference proceedings/Contribution to a book

PUBDB-2018-02829

The Gerda Experiment for the Search of Neutrinoless Double Beta Decay

Walter, M. ; Gerda Collaboration (Collaboration author)

2013
Verlag Deutsches Elektronen-Synchrotron Hamburg
ISBN: 978-3-935702-83-6

Walter, M. "The Gerda Experiment for the Search of Neutrinoless Double Beta Decay" in Proceedings, 9th Patras Workshop on Axions, WIMPs and WISPs (AXION-WIMP 2013) / Oberlack, Uwe, Sissol, Pierre (eds.), 2013 ; AXION-WIMP 2013 : 9th Patras Workshop on Axions, WIMPs and WISPs , 2013-06-23 - 2013-06-28, Mainz
9th Patras Workshop on Axions, WIMPs and WISPs, AXION-WIMP 2013, Mainz, Germany, 24 Jun 2013 - 28 Jun 2013 Hamburg : Verlag Deutsches Elektronen-Synchrotron, DESY-PROC 281-286 (2013) [10.3204/DESY-PROC-2013-04/walter_manuel]

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Report No.: DESY-PROC-2013-04

Abstract: The Gerda experiment, situated at Laboratori Nazionali del Gran Sasso is designed to search for the neutrinoless double $\beta$ decay. Bare high purity Ge-diodes enriched to 86 %in $^{76}Ge$ are directly immersed into liquid Ar. Phase I operated from November 2011 till May 2013 yielding an exposure of 21.6 kg·yr, with a mean background near the Q-value of2·$10^{−2}$ cts/(keV·kg·yr). A half-life of $1.84^{−0.10}_{+0.14}·10^{21}$ yr was recently published for the two-neutrino double $\beta$ decay. For Phase II, additional 20 kg of broad-energy Ge detectors will be installed to reach an exposure of 100 kg·yr with one order of magnitude less background, exploring half-lifes up to 1.5·$10^{26}$ yr. This will be achieved by liquid Ar instrumentation as an active veto, pulse shape analysis and a refined selection of radio-pure materials.

Keyword(s): Hypothetisches Teilchen

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