• DOI:10.1088/0954-3899/42/11/115201
• Corpus ID: 118209559

2νββ decay of 76Ge into excited states with GERDA phase I

@article{Agostini20152DO,
  title={2$\nu$$\beta$$\beta$ decay of 76Ge into excited states with GERDA phase I},
  author={Matteo Agostini and Matthias Allardt and A. M. Bakalyarov and M Balata and Igor I. Barabanov and Nuno Barros and Laura Baudis and Christian Bauer and N. Becerici-Schmidt and Enrico Bellotti and Sergey Belogurov and S. T. Belyaev and G. Benato and Alessandro Bettini and L. Bezrukov and Tobias Bode and Dorota Maria Borowicz and Viktor Brudanin and R. Brugnera and D. Budj'avs and Allen Caldwell and C. Cattadori and A. I. Chernogorov and Valerio D’Andrea and Elizaveta V. Demidova and Assunta Di Vacri and Alexander R. Domula and Evgeny Doroshkevich and V. G. Egorov and R. Falkenstein and O. Fedorova and K. Freund and N. Frodyma and Albert Gangapshev and A. Garfagnini and C. Gooch and P. Grabmayr and V. I. Gurentsov and K. Gusev and Alex Hegai and Mark Heisel and Sabine Hemmer and Gerd Heusser and Wilhelm Hofmann and Mikael Hult and L. V. Inzhechik and J. Janicsk'o Cs'athy and Josef Jochum and Markus Junker and V. Kazalov and Th. Kihm and I. V. Kirpichnikov and Andreas Kirsch and A. A. Klimenko and K. T. Knopfle and O. I. Kochetov and V. N. Kornoukhov and V. V. Kuzminov and Matthias Laubenstein and Antonio Di Lazzaro and V. I. Lebedev and Bjoern Lehnert and Hongbo Liao and Manfred Lindner and Ivano Lippi and A. Lubashevskiy and Bayarto K. Lubsandorzhiev and Guillaume Lutter and Carla Macolino and B{\'e}la Majorovits and W. Maneschg and Eduardo Medinaceli and Yongli Mi and M. Misiaszek and P. S. Moseev and I. B. Nemchenok and Dimitrios Palioselitis and K. Panas and Luciano Pandola and Krzysztof Pelczar and Antonio Pullia and Stefano Riboldi and N. S. Rumyantseva and Cinzia Sada and Marco Salathe and Christopher Schmitt and Basil Schneider and Jochen Schreiner and O. Schulz and Bernhard Schwingenheuer and Stefan Schonert and A-K. Schutz and O. Selivanenko and M. V. Shirchenko and H. Simgen and Anatoly A. Smolnikov and L. Stanco and M. Stepaniuk and Calin Alexandru Ur and Laura Vanhoefer and A. A. Vasenko and A. Veresnikova and Katharina von Sturm and V. Wagner and Marc Walter and Annemarie Wegmann and Thomas Wester and Heinrich Wilsenach and Mariusz W{\'o}jcik and E. A. Yanovich and P. Zavarise and I. V. Zhitnikov and S. V. Zhukov and Daniya Zinatulina and Kai Zuber and Grzegorz Zuzel},
  journal={Journal of Physics G},
  year={2015},
  volume={42},
  pages={115201-115218}
}

• M. Agostini, M. Allardt, +113 authors G. Zuzel
• Published 9 June 2015
• Physics
• Journal of Physics G

Two neutrino double beta decay of to excited states of has been studied using data from Phase I of the GERDA experiment. An array composed of up to 14 germanium detectors including detectors that have been isotopically enriched in was deployed in liquid argon. The analysis of various possible transitions to excited final states is based on coincidence events between pairs of detectors where a de-excitation γ ray is detected in one detector and the two electrons in the other. No signal has been observed and an event counting profile likelihood analysis has been used to determine Frequentist 90% C.L. bounds for three transitions: yr, yr and yr. These bounds are more than two orders of magnitude larger than those reported previously. Bayesian 90% credibility bounds were extracted and used to exclude several models for the transition.