Search for b + / EC double beta decay of 120
نویسندگان
چکیده
We present a search for b/EC double beta decay of Te performed with the CUORICINO experiment, an array of TeO2 cryogenic bolometers. After collecting 0.0573 kg . y of Te, we see no evidence of a signal and therefore set the following limits on the half-life: T1 m =2 > 1:9 . 10 y at 90% C.L. for the 0m mode and T 1=2 > 7:6 . 10 y at 90% C.L. for the 2m mode. These results improve the existing limits by almost three orders of magnitude (four in the case of 0m mode).
منابع مشابه
Double beta decay with large scale Yb-loaded scintillators
The potential of large scale Yb-loaded liquid scintillators as proposed for solar neutrino spectroscopy are investigated with respect to double beta decay. The potential for β−β− decay of Y b as well as the β/EC decay for Y b is discussed. Not only getting for the first time an experimental half-life limit on Y b decay, this will even be at least comparable or better than existing ones from dif...
متن کاملA search for various double beta decay modes of tin isotopes
For the first time an extensive search for various double beta decay modes of 124Sn and 112Sn has been performed. A total exposure of 43.29 kg×days has been accumulated. New half-life limits of 124Sn into excited states of 124Te have been obtained; the lower half-life limit for the first excited 2+ state at 602.7 keV is T1/2> 3.1 × 10 18yrs (90 % CL) and for the first excited 0+ state T1/2> 7.7...
متن کامل2 v 1 3 D ec 2 00 4 Search for neutrinoless double beta decay with the NEMO - 3 detector : first results
The NEMO-3 detector, which has been operating in the Fréjus Underground Laboratory since February 2003, is devoted to searching for neutrinoless double beta decay (ββ0ν). The expected performance of the detector has been successfully achieved. Half-lives of the two neutrinos double beta decay (ββ2ν) have been measured for 150 Nd. After 265 days of data collection from February 2003 until March ...
متن کاملar X iv : h ep - p h / 97 12 38 1 v 1 1 5 D ec 1 99 7 1 Search for New Physics with Neutrinoless Double Beta Decay ∗
Neutrinoless double beta decay (0νββ) is one of the most sensitive approaches to test particle physics beyond the standard model. During the last years, besides the most restrictive limit on the effective Majorana neutrino mass, the analysis of new contributions by the Heidelberg group led to bounds on left-right-symmetric models, leptoquarks and R-parity violating models competitive to recent ...
متن کاملOverconstrained estimates of neutrinoless double beta decay within the QRPA
Estimates of nuclear matrix elements for neutrinoless double beta decay (0ν2β) based on the quasiparticle random phase approximations (QRPA) are affected by theoretical uncertainties, which can be substantially reduced by fixing the unknown strength parameter gpp of the residual particle-particle interaction through one experimental constraint — most notably through the twoneutrino double beta ...
متن کامل