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Double-β decay of116Cd |
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| Authors: | R Arnold C Augier A Barabash D Blum V Brudanin J E Campagne D Dassié V Egorov R Eschbach J L Guyonnet F Hubert Ph Hubert S Jullian O Kochetov I Kisel V N Kornoukov V Kovalenko D Lalanne F Laplanche F Leccia I Linck C Longuemare F Mauger P Mennrath H W Nicholson A Nozdrin F Piquemal O Purtov J-L Reyss F Scheibling J Suhonen C S Sutton G Szklarz V I Tretyak V Umatov I Vanushin A Vareille Yu Vasilyev Ts Vylov V Zerkin |
| Institution: | 1. CRN, IN2P3-CNRS et Université Louis Pasteur, F-67037, Strasbourg, France 2. LAL, IN2P3-CNRS et Université Paris-Sud, F-91405, Orsay, France 3. ITEP, Moscow, Russia 4. JINR, Dubna, Russia 5. CENBG, IN2P3-CNRS et Université de Bordeaux, F-33170, Gradignan, France 6. LPC, IN2P3-CNRS et Université de Caen, F-14032, Caen, France 7. MHC, 01075, South Hadley, Massachusetts, USA 8. INR, Kiev, Ukraine 9. CFR, CNRS, F-91190, Gif sur Yvette, France 10. JYV?SKYL? University, FIN-40351, Jyv?skyl?, Finland |
| Abstract: | The NEMO-2 tracking detector located in the Fréjus Underground Laboratory was designed as a prototype of the detector NEMO-3 to study 0ν and 2ν double-beta decay (ββ) physics. After ten months of nearly continuous running with an enriched cadmium source (0.92 mol·y of116Cd) aββ2ν half-life ofT 1/2=(3.75±0.35(stat)±0.21(syst))·1019 y was measured. Limits with 90% CL on the116Cd half-lives of 5.0·1021 y forββ0ν decay and of 1.2·1021 y forββ0νχ 0 decay with a Majoron (χ 0) were obtained. Theoretical predictions for 0ν and 2ν decays of116Cd are also presented. |
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