Back to Search
Start Over
Development of 100 Mo -containing scintillating bolometers for a high-sensitivity neutrinoless double-beta decay search.
- Source :
-
The European physical journal. C, Particles and fields [Eur Phys J C Part Fields] 2017; Vol. 77 (11), pp. 785. Date of Electronic Publication: 2017 Nov 21. - Publication Year :
- 2017
-
Abstract
- This paper reports on the development of a technology involving 100 Mo -enriched scintillating bolometers, compatible with the goals of CUPID, a proposed next-generation bolometric experiment to search for neutrinoless double-beta decay. Large mass ( ∼ 1 kg ), high optical quality, radiopure 100 Mo -containing zinc and lithium molybdate crystals have been produced and used to develop high performance single detector modules based on 0.2-0.4 kg scintillating bolometers. In particular, the energy resolution of the lithium molybdate detectors near the Q -value of the double-beta transition of 100 Mo (3034 keV) is 4-6 keV FWHM. The rejection of the α -induced dominant background above 2.6 MeV is better than 8 σ . Less than 10 μ Bq/kg activity of 232 Th ( 228 Th ) and 226 Ra in the crystals is ensured by boule recrystallization. The potential of 100 Mo -enriched scintillating bolometers to perform high sensitivity double-beta decay searches has been demonstrated with only 10 kg × d exposure: the two neutrino double-beta decay half-life of 100 Mo has been measured with the up-to-date highest accuracy as T 1 / 2 = [6.90 ± 0.15(stat.) ± 0.37(syst.)] × 10 18 years . Both crystallization and detector technologies favor lithium molybdate, which has been selected for the ongoing construction of the CUPID-0/Mo demonstrator, containing several kg of 100 Mo .<br /> (© The Author(s) 2017.)
Details
- Language :
- English
- ISSN :
- 1434-6044
- Volume :
- 77
- Issue :
- 11
- Database :
- MEDLINE
- Journal :
- The European physical journal. C, Particles and fields
- Publication Type :
- Academic Journal
- Accession number :
- 31997932
- Full Text :
- https://doi.org/10.1140/epjc/s10052-017-5343-2