Germanium Detector Array: Difference between revisions

Revision as of 17:37, 15 January 2022

Revision as of 20:32, 15 January 2022

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Phase II (7 strings, 35.8&nbsp;kg of enriched detectors) was started in Dec 2015.<ref name=G2-07>{{cite conference |title=First results from GERDA Phase II |author=GERDA collaboration |author2=M.Agostini|display-authors=etal<!--|collaboration=GERDA collaboration--> |date=8 July 2016 |url=https://www.mpi-hd.mpg.de/gerda/public/2016/t16_neutrino_gerda_ma.pdf |conference=XXVII International Conference on Neutrino Physics and Astrophysics (Neutrino 2016) |conference-url=http://neutrino2016.iopconfs.org/programme |___location=London}}</ref>{{rp|10}}

Preliminary results of Phase II have been published in Nature.<ref>{{citation |author=GERDA collaboration |author2=M.Agostini|display-authors=etal|periodical=Nature|title=Background-free search for neutrinoless double-β decay of ⁷⁶Ge with GERDA|volume=544|issue=7648|pages=47–52|date=2017-04-05|language=German|doi=10.1038/nature21717|pmid=28382980|arxiv=1703.00570|bibcode=2017Natur.544...47A|s2cid=4456764}}</ref> The background index for BEGe detectors is 0.7·10⁻³ counts/(keV·kg·yr), which translates to less than one count in the signal region after an exposure of 100&nbsp;kg·yr. Again no neutrinoless decays were observed, bringing the present limit on the half life to T_1/2{{nbsp}}>{{nbsp}}5.3·10²⁵ yr (90% C.L.).

As of 2018, the Phase II data-taking continues.