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• W2051382682 abstract "The Germanium Detector Array (G erda ) is a low background experiment at the Laboratori Nazionali del Gran Sasso (LNGS) of the INFN designed to search for the rare neutrinoless double beta decay ( <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M1><mml:mn mathvariant=normal>0</mml:mn><mml:mi>ν</mml:mi><mml:mi>β</mml:mi><mml:mi>β</mml:mi></mml:math> ) of <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M2><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant=normal /><mml:mi mathvariant=normal /></mml:mrow><mml:mrow><mml:mn mathvariant=normal>76</mml:mn></mml:mrow></mml:msup></mml:mrow></mml:math> Ge. In its first phase, high purity germanium diodes inherited from the former Heidelberg-Moscow and I gex experiments are operated “bare” and immersed in liquid argon, with an overall background environment of 10 −2 cts/(keV·kg·yr), a factor of ten better than its predecessors. Measurements on two-neutrino double beta decay ( <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M3><mml:mn mathvariant=normal>2</mml:mn><mml:mi>ν</mml:mi><mml:mi>β</mml:mi><mml:mi>β</mml:mi></mml:math> ) giving <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M4><mml:msubsup><mml:mrow><mml:mi>T</mml:mi></mml:mrow><mml:mrow><mml:mn mathvariant=normal>1</mml:mn><mml:mo>/</mml:mo><mml:mn mathvariant=normal>2</mml:mn></mml:mrow><mml:mrow><mml:mn mathvariant=normal>2</mml:mn><mml:mi>ν</mml:mi></mml:mrow></mml:msubsup><mml:mo>=</mml:mo><mml:mo stretchy=false>(</mml:mo><mml:mn mathvariant=normal>1.88</mml:mn><mml:mo>±</mml:mo><mml:mn mathvariant=normal>0.10</mml:mn><mml:mo stretchy=false>)</mml:mo><mml:mo>×</mml:mo><mml:mn mathvariant=normal>1</mml:mn><mml:msup><mml:mrow><mml:mn mathvariant=normal>0</mml:mn></mml:mrow><mml:mrow><mml:mn mathvariant=normal>21</mml:mn></mml:mrow></mml:msup><mml:mi mathvariant=normal /><mml:mtext> yr</mml:mtext><mml:mi mathvariant=normal /></mml:math> and recently published background model and pulse shape performances of the detectors are discussed in the paper. A new result on <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M5><mml:mn mathvariant=normal>0</mml:mn><mml:mi>ν</mml:mi><mml:mi>β</mml:mi><mml:mi>β</mml:mi></mml:math> has been recently published with a half-life limit on <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M6><mml:mn mathvariant=normal>0</mml:mn><mml:mi>ν</mml:mi><mml:mi>β</mml:mi><mml:mi>β</mml:mi></mml:math> decay <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M7><mml:msubsup><mml:mrow><mml:mi>T</mml:mi></mml:mrow><mml:mrow><mml:mn mathvariant=normal>1</mml:mn><mml:mo>/</mml:mo><mml:mn mathvariant=normal>2</mml:mn></mml:mrow><mml:mrow><mml:mn mathvariant=normal>0</mml:mn><mml:mi>ν</mml:mi></mml:mrow></mml:msubsup><mml:mo>></mml:mo><mml:mn mathvariant=normal>2.1</mml:mn><mml:mo>×</mml:mo><mml:mn mathvariant=normal>1</mml:mn><mml:msup><mml:mrow><mml:mn mathvariant=normal>0</mml:mn></mml:mrow><mml:mrow><mml:mn mathvariant=normal>25</mml:mn></mml:mrow></mml:msup><mml:mi mathvariant=normal /><mml:mtext> yr</mml:mtext><mml:mi mathvariant=normal /></mml:math> (90% C.L.). A second phase of the experiment is scheduled to start during the year 2014, after a major upgrade shutdown. Thanks to the increased detector mass with new designed diodes and to the introduction of liquid argon instrumentation techniques, the experiment aims to reduce further the expected background to about 10 −3 cts/(keV·kg·yr) and to improve the <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M8><mml:mn mathvariant=normal>0</mml:mn><mml:mi>ν</mml:mi><mml:mi>β</mml:mi><mml:mi>β</mml:mi></mml:math> sensitivity to about <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M9><mml:msubsup><mml:mrow><mml:mi>T</mml:mi></mml:mrow><mml:mrow><mml:mn mathvariant=normal>1</mml:mn><mml:mo>/</mml:mo><mml:mn mathvariant=normal>2</mml:mn></mml:mrow><mml:mrow><mml:mn mathvariant=normal>0</mml:mn><mml:mi>ν</mml:mi></mml:mrow></mml:msubsup><mml:mo>></mml:mo><mml:mn mathvariant=normal>1.5</mml:mn><mml:mo>×</mml:mo><mml:mn mathvariant=normal>1</mml:mn><mml:msup><mml:mrow><mml:mn mathvariant=normal>0</mml:mn></mml:mrow><mml:mrow><mml:mn mathvariant=normal>26</mml:mn></mml:mrow></mml:msup><mml:mi mathvariant=normal /><mml:mtext> yr</mml:mtext><mml:mi mathvariant=normal /></mml:math> (90% C.L.)." @default.
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• W2051382682 date "2013-01-01" @default.
• W2051382682 modified "2023-10-16" @default.
• W2051382682 title "Status of the GERDA Experiment at the Laboratori Nazionali del Gran Sasso" @default.
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• W2051382682 doi "https://doi.org/10.1155/2013/506186" @default.
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