Double beta decay of 116Cd has been investigated with the help of radiopure enriched 116CdWO4 crystal scintillators in the experiment Aurora. The half-life of 116Cd relatively to the 2ν2β decay of 116Cd to the ground level of 116Sn is measured with the highest up-to-date accuracy as T1/2 = [2.69 ± 0.02 (stat.) ± 0.14 (syst.)] × 10^19 yr. A new improved limit on the 0ν2β decay of 116Cd to the ground state of 116Sn is set as T1/2 ≥ 2.4 × 10^23 yr at 90% C.L., that corresponds to the effective Majorana neutrino mass limit in the range 〈mν〉 ≤ (1.1 − 1.6) eV, depending on the nuclear matrix elements used in the estimations. New improved limits on other 2β processes in 116Cd (decays with majoron emission, transitions to excited levels of 116Sn) were set at the level of T1/2 ≥ 10^21 − 10^22 yr.
Polischuk, O.g., Barabash, A.s., Belli, P., Bernabei, R., Cappella, F., Caracciolo, V., et al. (2017). Investigation of 2β decay of 116Cd with the help of enriched 116CdWO4 crystal scintillators. In I.S.a.J.S. Osvaldo Civitarese (a cura di), Proceed. of the WORKSHOP ON CALCULATION OF DOUBLE-BETA-DECAY MATRIX ELEMENTS (MEDEX’17); Conference date: 29 May–2 June 2017; Location: Prague, Czech Republic (pp. 020018-1-020018-5). new york : AIP [10.1063/1.5007643].
Investigation of 2β decay of 116Cd with the help of enriched 116CdWO4 crystal scintillators
Bernabei R;Caracciolo V;d’Angelo S;
2017-01-01
Abstract
Double beta decay of 116Cd has been investigated with the help of radiopure enriched 116CdWO4 crystal scintillators in the experiment Aurora. The half-life of 116Cd relatively to the 2ν2β decay of 116Cd to the ground level of 116Sn is measured with the highest up-to-date accuracy as T1/2 = [2.69 ± 0.02 (stat.) ± 0.14 (syst.)] × 10^19 yr. A new improved limit on the 0ν2β decay of 116Cd to the ground state of 116Sn is set as T1/2 ≥ 2.4 × 10^23 yr at 90% C.L., that corresponds to the effective Majorana neutrino mass limit in the range 〈mν〉 ≤ (1.1 − 1.6) eV, depending on the nuclear matrix elements used in the estimations. New improved limits on other 2β processes in 116Cd (decays with majoron emission, transitions to excited levels of 116Sn) were set at the level of T1/2 ≥ 10^21 − 10^22 yr.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
