Search for double beta decay of 116 Cd with enriched 116
نویسندگان
چکیده
The Aurora experiment to investigate double beta decay of Cd with the help of 1.162 kg cadmium tungstate crystal scintillators enriched in Cd to 82% is in progress at the Gran Sasso Underground Laboratory. The half-life of Cd relatively to the two neutrino double beta decay is measured with the highest up-to-date accuracy T1/2 = (2.62 ± 0.14) × 10 yr. The sensitivity of the experiment to the neutrinoless double beta decay of Cd to the ground state of Sn is estimated as T1/2 ≥ 1.9×10 yr at 90% CL, which corresponds to the effective Majorana neutrino mass limit 〈mν〉 ≤ (1.2 − 1.8) eV. New limits are obtained for the double beta decay of Cd to the excited levels of Sn, and for the neutrinoless double beta decay with emission of majorons.
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