Published in Physical Review C, Volume 85, April 16, 2012.
The definitive version is available at https://doi.org/10.1103/PhysRevC.85.045503.
The CUORICINO experiment was an array of 62 TeO2 single-crystal bolometers with a total 130Te mass of 11.3kg. The experiment finished in 2008 after more than 3 yr of active operating time. Searches for both 0ν and 2ν double-β decay to the first excited 0+ state in 130Xe were performed by studying different coincidence scenarios. The analysis was based on data representing a total exposure of N(130Te)⋅t=9.5×1025yr. No evidence for a signal was found. The resulting lower limits on the half-lives are T2ν12(130Te→130Xe∗)>1.3×1023yr (90% C.L.), and T0ν12(130Te→130Xe∗)>9.4×1023yr (90% CL).
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