Measurement of the 2νßß Decay Half-Life of
Phys Rev Lett
; 131(22): 222501, 2023 Dec 01.
Article
in En
| MEDLINE
| ID: mdl-38101385
ABSTRACT
We report on the results obtained with the global CUPID-0 background model, which combines the data collected in the two measurement campaigns for a total exposure of 8.82 kg×yr of ^{82}Se. We identify with improved precision the background sources within the 3 MeV energy region, where neutrinoless double ß decay of ^{82}Se and ^{100}Mo is expected, making more solid the foundations for the background budget of the next-generation CUPID experiment. Relying on the excellent data reconstruction, we measure the two-neutrino double ß-decay half-life of ^{82}Se with unprecedented accuracy T_{1/2}^{2ν}=[8.69±0.05(stat)_{-0.06}^{+0.09}(syst)]×10^{19} yr.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Language:
En
Journal:
Phys Rev Lett
/
Phys. rev. lett
/
Physical review letters
Year:
2023
Type:
Article
Affiliation country:
Italy