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arxiv 1212.3210 v1 pith:65NFWX7Z submitted 2012-12-13 nucl-ex hep-ex

Measurement of the half-life of the two-neutrino double beta decay of Ge-76 with the Gerda experiment

GERDA Collaboration: M. Agostini , M. Allardt , E. Andreotti , A. M. Bakalyarov , M. Balata , I. Barabanov , M. Barnabe Heider , N. Barros
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L. Baudis C. Bauer N. Becerici-Schmidt E. Bellotti S. Belogurov S. T. Belyaev G. Benato A. Bettini L. Bezrukov T. Bode V. Brudanin R. Brugnera D. Budjas A. Caldwell C. Cattadori A. Chernogorov F. Cossavella E. V. Demidova A. Denisov A. Domula V. Egorov R. Falkenstein A. D. Ferella K. Freund F. Froborg N. Frodyma A. Gangapshev A. Garfagnini S. Gazzana P. Grambayr V. Gurentsov K. Gusev K. K. Guthikonda W. Hampel A. Hegai M. Heisel S. Hemmer G. Heusser W. Hofmann M. Hult L. V. Inzhechik L. Ioannucci J. Janicsko Csathy J. Jochum M. Junker S. Kianovsky I. V. Kirpichnikov A. Kirsch A. Klimenko K. T. Knoepfle O. Kochetov V. N. Kornoukhov V. Kusminov M. Laubenstein A. Lazzaro V. I. Lebedev B. Lehnert H. Y. Liao M. Lindner I. Lippi X. Liu A. Lubashevskiy B. Lubsandorzhiev G. Lutter A. A. Machado B. Majorovits W. Maneschg I. Nemchenok S. Nisi C. O'Shaughnessy L. Pandola K. Pelczar L. Peraro A. Pullia S. Riboldi F. Ritter C. Sada M. Salathe C. Schmitt S. Schoenert J. Schreiner O. Schulz B. Schwingenheuer E. Shevchik M. Shirchenko H. Simgen A. Smolnikov L. Stanco H. Strecker M. Tarka C. A. Ur A. A. Vasenko O. Volynets K. von Sturm M. Walter A. Wegmann M. Wojcik E. Yanovich P. Zavarise I. Zhitnikov S. V. Zhukov D. Zinatulina K. Zuber G. Zuzel
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classification nucl-ex hep-ex
keywords ge-76betadecaydoubleexperimentgerdahalf-lifedata
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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The primary goal of the GERmanium Detector Array (Gerda) experiment at the Laboratori Nazionali del Gran Sasso of INFN is the search for the neutrinoless double beta decay of Ge-76. High-purity germanium detectors made from material enriched in Ge-76 are operated directly immersed in liquid argon, allowing for a substantial reduction of the background with respect to predecessor experiments. The first 5.04 kg yr of data collected in Phase I of the experiment have been analyzed to measure the half-life of the neutrino-accompanied double beta decay of Ge-76. The observed spectrum in the energy range between 600 and 1800 keV is dominated by the double beta decay of Ge-76. The half-life extracted from Gerda data is T(1/2) = (1.84 +0.14 -0.10) 10^{21} yr.

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