2012-04-16 Search for double-β decay of 130Te to the first 0+ excited state of 130Xe with the CUORICINO experiment bolometer array
Search for double-β decay of Te-130 to the first 0+ excited state of Xe-130 with the CUORICINO experiment bolometer array
The CUORICINO experiment was an array of 62 TeO2 single-crystal bolometers with a total 130Te mass of 11.3 kg. 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 = 9.5×1025 yr. No evidence for a signal was found. The resulting lower limits on the half-lives are T2ν1/2(130Te→130Xe*) > 1.3×1023 yr (90% C.L.), and T0ν1/2(130Te→130Xe*) > 9.4×1023 yr (90% CL).