Final results of studies of 116Cd 2β decay with CdWO4 crystal scintillators, enriched in 116Cd to 82%, are presented. After few years (2011 – 2017) of measurements with radiopure 116CdWO4 scintillators (mass of 1.162 kg) at the Gran Sasso underground laboratory (Italy), the half-life of 116Cd relatively to 2ν2β decay to the ground state of 116Sn was measured with the highest up-to-date accuracy as T1/2=(2.63+0.11−0.12)×10^19 yr. A new limit on 0ν2β decay of 116Cd was set as T1/2≥2.2×10^23 yr at 90% C.L., which is the most stringent to-date restriction for this isotope. Limits for 0ν2β decay with majoron(s) emission, Lorentz-violating 2ν2β decay and 2β transitions to excited states of 116Sn were set at the level of T1/2≥10^20−10^22 yr.
Tretyak, V.i., Barabash, A.s., Belli, P., Bernabei, R., Cappella, F., Caracciolo, V., et al. (2019). Aurora experiment: Final results of studies of 116Cd 2β decay with enriched 116CdWO4 crystal scintillators. In I.S.a.J.S. Osvaldo Civitarese (a cura di), WORKSHOP ON CALCULATION OF DOUBLE-BETA-DECAY MATRIX ELEMENTS (MEDEX’19) Conference date: 27–31 May 2019, Prague, Czech Republic (pp. 020029-1-020029-5). New York : AIP [10.1063/1.5130990].
Aurora experiment: Final results of studies of 116Cd 2β decay with enriched 116CdWO4 crystal scintillators
Bernabei R;Caracciolo V;d’Angelo S;
2019-01-01
Abstract
Final results of studies of 116Cd 2β decay with CdWO4 crystal scintillators, enriched in 116Cd to 82%, are presented. After few years (2011 – 2017) of measurements with radiopure 116CdWO4 scintillators (mass of 1.162 kg) at the Gran Sasso underground laboratory (Italy), the half-life of 116Cd relatively to 2ν2β decay to the ground state of 116Sn was measured with the highest up-to-date accuracy as T1/2=(2.63+0.11−0.12)×10^19 yr. A new limit on 0ν2β decay of 116Cd was set as T1/2≥2.2×10^23 yr at 90% C.L., which is the most stringent to-date restriction for this isotope. Limits for 0ν2β decay with majoron(s) emission, Lorentz-violating 2ν2β decay and 2β transitions to excited states of 116Sn were set at the level of T1/2≥10^20−10^22 yr.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
