Measurement of the half-life of the two-neutrino double beta decay of Ge-76 with the Gerda experiment
GERDA Collaboration · Agostini, M. · Allardt, M. · Andreotti, E. · Bakalyarov, A. M. · Balata, M. · Barabanov, I. · Heider, M. Barnabe · Barros, N. · Baudis, L. · Bauer, C. · Becerici-Schmidt, N. · Bellotti, E. · Belogurov, S. · Belyaev, S. T. · Benato, G. · Bettini, A. · Bezrukov, L. · Bode, T. · Brudanin, V. · Brugnera, R. · Budjas, D. · Caldwell, A. · Cattadori, C. · Chernogorov, A. · Cossavella, F. · Demidova, E. V. · Denisov, A. · Domula, A. · Egorov, V. · Falkenstein, R. · Ferella, A. D. · Freund, K. · Froborg, F. · Frodyma, N. · Gangapshev, A. · Garfagnini, A. · Gazzana, S. · Grambayr, P. · Gurentsov, V. · Gusev, K. · Guthikonda, K. K. · Hampel, W. · Hegai, A. · Heisel, M. · Hemmer, S. · Heusser, G. · Hofmann, W. · Hult, M. · Inzhechik, L. V. · Ioannucci, L. · Csathy, J. Janicsko · Jochum, J. · Junker, M. · Kianovsky, S. · Kirpichnikov, I. V. · Kirsch, A. · Klimenko, A. · Knoepfle, K. T. · Kochetov, O. · Kornoukhov, V. N. · Kusminov, V. · Laubenstein, M. · Lazzaro, A. · Lebedev, V. I. · Lehnert, B. · Liao, H. Y. · Lindner, M. · Lippi, I. · Liu, X. · Lubashevskiy, A. · Lubsandorzhiev, B. · Lutter, G. · Machado, A. A. · Majorovits, B. · Maneschg, W. · Nemchenok, I. · Nisi, S. · O'Shaughnessy, C. · Pandola, L. · Pelczar, K. · Peraro, L. · Pullia, A. · Riboldi, S. · Ritter, F. · Sada, C. · Salathe, M. · Schmitt, C. · Schoenert, S. · Schreiner, J. · Schulz, O. · Schwingenheuer, B. · Shevchik, E. · Shirchenko, M. · Simgen, H. · Smolnikov, A. · Stanco, L. · Strecker, H. · Tarka, M. · Ur, C. A. · Vasenko, A. A. · Volynets, O. · von Sturm, K. · Walter, M. · Wegmann, A. · Wojcik, M. · Yanovich, E. · Zavarise, P. · Zhitnikov, I. · Zhukov, S. V. · Zinatulina, D. · Zuber, K. · Zuzel, G.
Original · EN
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) 10²¹ yr.
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