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Phase II (7 strings, 35.8 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, M.Agostini et al.<!--|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}}
Results of Phase II have been published in Nature.<ref>{{citation/core|Surname1=GERDA collaboration, M.Agostini et al.|Periodical=Nature|Title=Background-free search for neutrinoless double-β decay of <sup>76</sup>Ge with GERDA|Volume=544|At=p. 47|Date=2017-04-05|language=German|doi=10.1038/nature21717|arxiv=1703.00570|bibcode=2017Natur.544...47A}}</ref> The background index for BEGe detectors is 0.7·10<sup>−3</sup> counts/(keV·kg·yr), which translates to less than one count in the signal region after an exposure of 100 kg·yr. The present limit on the half life is T<sub>1/2</sub>=5.3·10<sup>25</sup> yr (90% C.L.).
== References ==
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== Publications ==
* {{cite journal |arxiv=1307.4720 |bibcode=2013PhRvL.111l2503A |doi=10.1103/PhysRevLett.111.122503 |pmid=24093254 |title=Results on Neutrinoless Double-β Decay of <sup>76</sup>Ge from Phase I of the GERDA Experiment |journal=[[Physical Review Letters]] |volume=111 |issue=12 |pages=122503 |date=19 September 2013 |author=GERDA collaboration, Agostini M. |display-authors=etal}}
* {{cite journal |arxiv=1212.3210 |bibcode=2013JPhG...40c5110T |doi=10.1088/0954-3899/40/3/035110 |title=Measurement of the half-life of the two-neutrino double beta decay of <sup>76</sup>Ge with the GERDA experiment |journal=[[Journal of Physics G]] |volume=40 |issue=3 |pages=035110 |date=12 February 2013 |author=GERDA collaboration, Agostini M. |display-authors=etal}}
* {{cite journal |arxiv=1212.4067 |bibcode=2013EPJC...73.2330A |doi=10.1140/epjc/s10052-013-2330-0 |doi-access=free |title=The GERDA experiment for the search of 0νββ decay in <sup>76</sup>Ge |journal=[[European Physical Journal C]] |volume=73 |issue=3 |pages=2330 |date=March 2013 |author=GERDA collaboration, Ackermann K.-H. |display-authors=etal}}
* {{cite journal |arxiv=1703.00570 |doi=10.1038/nature21717 |title=Background-free search for neutrinoless double-β decay of <sup>76</sup>Ge with GERDA|journal=[[Nature (journal)|Nature]] |volume=544 |issue=7648|pages=47 |date=5 April 2017 |author=GERDA collaboration, Agostini M. |display-authors=etal|bibcode=2017Natur.544...47A}}
== External links ==
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