Eur. Phys. J. C (2020) 80: 674
https://doi.org/10.1140/epjc/s10052-020-8203-4

Regular Article - Experimental Physics

Precise measurement of decay of Mo with the CUPID-Mo detection technology

¹ IRFU, CEA, Université Paris-Saclay, 91191, Gif-sur-Yvette, France
² Univ Lyon, Université Lyon 1, CNRS/IN2P3, IP2I-Lyon, 69622, Villeurbanne, France
³ National Research Centre Kurchatov Institute, Institute of Theoretical and Experimental Physics, 117218, Moscow, Russia
⁴ Dipartimento di Fisica, Sapienza Università di Roma, P.le Aldo Moro 2, 00185, Rome, Italy
⁵ INFN, Sezione di Roma, P.le Aldo Moro 2, 00185, Rome, Italy
⁶ Department of Physics, University of California, Berkeley, CA, 94720, USA
⁷ Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
⁸ CNRS-Néel, 38042, Grenoble Cedex 9, France
⁹ CSNSM, Univ. Paris-Sud, CNRS/IN2P3, Université Paris-Saclay, 91405, Orsay, France
¹⁰ Nikolaev Institute of Inorganic Chemistry, 630090, Novosibirsk, Russia
¹¹ LAL, Univ. Paris-Sud, CNRS/IN2P3, Université Paris-Saclay, 91898, Orsay, France
¹² Laboratory of Nuclear Problems, JINR, 141980, Dubna, Moscow region, Russia
¹³ IRAMIS, CEA, Université Paris-Saclay, 91191, Gif-sur-Yvette, France
¹⁴ Institute for Nuclear Research of NASU, 03028, Kyiv, Ukraine
¹⁵ Karlsruhe Institute of Technology, Institut für Kernphysik, 76021, Karlsruhe, Germany
¹⁶ Dipartimento di Fisica, Università di Milano - Bicocca, 20126, Milan, Italy
¹⁷ INFN, Sezione di Milano - Bicocca, 20126, Milan, Italy
¹⁸ Key Laboratory of Nuclear Physics and Ion-beam Application (MOE), Fudan University, Shanghai, 200433, People’s Republic of China
¹⁹ Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
²⁰ Karlsruhe Institute of Technology, Institut für Prozessdatenverarbeitung und Elektronik, 76021, Karlsruhe, Germany
²¹ Finnish Institute for Educational Research, University of Jyväskylä, P.O. Box 35, 40014, Jyvaskyla, Finland
²² INFN, Laboratori Nazionali del Gran Sasso, 67100, Assergi, AQ, Italy
²³ Physik Department, Technische Universität München, Garching, 85748, Germany
²⁴ Department of Physics and Astronomy, University of South Carolina, Columbia, SC, 29208, USA
²⁵ Department of Modern Physics, University of Science and Technology of China, Hefei, 230027, People’s Republic of China
²⁶ Université Grenoble Alpes, CNRS, Grenoble INP, SIMAP, 38402, Saint Martin d’Héres, France
²⁷ Present address: INFN, Laboratori Nazionali del Gran Sasso, 67100, Assergi, AQ, Italy
²⁸ Present address: Department of Physics, University of California, Berkeley, CA, 94720, USA

^* e-mail: andrea.giuliani@csnsm.in2p3.fr

Received: 18 December 2019
Accepted: 4 July 2020
Published online: 25 July 2020

Abstract

We report the measurement of the two-neutrino double-beta () decay of Mo to the ground state of Ru using lithium molybdate () scintillating bolometers. The detectors were developed for the CUPID-Mo program and operated at the EDELWEISS-III low background facility in the Modane underground laboratory (France). From a total exposure of 42.235 kgday, the half-life of Mo is determined to be  years. This is the most accurate determination of the half-life of Mo to date.