Search for neutrinoless double beta decay with GERDA phase II
Research output: Contribution to book/Conference proceedings/Anthology/Report › Conference contribution › Contributed › peer-review
Contributors
- Chair of Nuclear Physics
- University of Zurich
- University of Milan - Bicocca
- University of Padua
- Technical University of Munich
- University of Tübingen
- TUD Dresden University of Technology
Abstract
The GERmanium Detector Array (gerda) experiment, located at the Gran Sasso underground laboratory in Italy, is one of the leading experiments for the search of 0νββ decay. In Phase II of the experiment 35.6 kg of enriched germanium detectors are operated. The application of active background rejection methods, such as a liquid argon scintillation light read-out and pulse shape discrimination of germanium detector signals, allowed to reduce the background index to the intended level of 10-3 cts/(keV·kg·yr).
In the first five month of data taking 10.8 kg yr of exposure were accumulated. No signal has been found and together with data from Phase I a new limit for the neutrinoless double beta decay half-life of 76Ge of 5.3·1025 yr at 90% C.L. was established in June 2016. Phase II data taking is ongoing and will allow the exploration of half-lifes in the 1026 yr regime. The current status of data taking and an update on the background index are presented.
Details
Original language | English |
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Title of host publication | Workshop on Calculation of Double-Beta-Decay Matrix Elements, MEDEX 2017 |
Editors | Osvaldo Civitarese, Jouni Suhonen, Ivan Stekl |
Publisher | American Institute of Physics Inc. |
ISBN (electronic) | 9780735415775 |
Publication status | Published - 16 Oct 2017 |
Peer-reviewed | Yes |
Publication series
Series | AIP Conference Proceedings |
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Number | 1 |
Volume | 1894 |
ISSN | 0094-243X |
Conference
Title | 11th Workshop on Calculation of Double-Beta-Decay Matrix Elements, MEDEX 2017 |
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Duration | 29 May - 2 June 2017 |
City | Prague |
Country | Czech Republic |