Search for beta plus/EC double beta decay of 120Te
E. Andreotti, C. Arnaboldi, F. T. Avignone III, M. Balata, I. Bandac,, M. Barucci, J. W. Beeman, F. Bellini, C. Brofferio, A. Bryant, C. Bucci, L., Canonica, S. Capelli, L. Carbone, M. Carrettoni, M. Clemenza, O. Cremonesi,, R. J. Creswick, S. Di Domizio, M. J. Dolinski
TL;DR
This study searches for rare double beta decay modes of 120Te using cryogenic bolometers, setting new stringent limits on their half-lives and improving previous bounds significantly.
Contribution
First search for beta plus/EC double beta decay of 120Te with cryogenic bolometers, establishing the most restrictive half-life limits to date.
Findings
No evidence of decay observed.
Limits on half-life: >1.9×10^{21} years (0ν) and >7.6×10^{19} years (2ν).
Limits improved by nearly three orders of magnitude.
Abstract
We present a search for beta plus/EC double beta decay of 120Te performed with the CUORICINO experiment, an array of TeO2 cryogenic bolometers. After collecting 0.0573 kg y of 120Te, we see no evidence of a signal and therefore set the following limits on the half-life: T1/2 (0nu) > 1.9 10^{21} y at 90% C.L. for the 0 neutrino mode and T1/2 (2nu) > 7.6 10^{19} y at 90% C.L. for the two neutrino mode. These results improve the existing limits by almost three orders of magnitude (four in the case of 0 neutrino mode).
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