1. Development of 100 Mo -containing scintillating bolometers for a high-sensitivity neutrinoless double-beta decay search.
- Author
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Armengaud E, Augier C, Barabash AS, Beeman JW, Bekker TB, Bellini F, Benoît A, Bergé L, Bergmann T, Billard J, Boiko RS, Broniatowski A, Brudanin V, Camus P, Capelli S, Cardani L, Casali N, Cazes A, Chapellier M, Charlieux F, Chernyak DM, de Combarieu M, Coron N, Danevich FA, Dafinei I, Jesus M, Devoyon L, Domizio SD, Dumoulin L, Eitel K, Enss C, Ferroni F, Fleischmann A, Foerster N, Gascon J, Gastaldo L, Gironi L, Giuliani A, Grigorieva VD, Gros M, Hehn L, Hervé S, Humbert V, Ivannikova NV, Ivanov IM, Jin Y, Juillard A, Kleifges M, Kobychev VV, Konovalov SI, Koskas F, Kozlov V, Kraus H, Kudryavtsev VA, Laubenstein M, Sueur HL, Loidl M, Magnier P, Makarov EP, Mancuso M, de Marcillac P, Marnieros S, Marrache-Kikuchi C, Nagorny S, Navick XF, Nikolaichuk MO, Nones C, Novati V, Olivieri E, Pagnanini L, Pari P, Pattavina L, Pavan M, Paul B, Penichot Y, Pessina G, Piperno G, Pirro S, Plantevin O, Poda DV, Queguiner E, Redon T, Rodrigues M, Rozov S, Rusconi C, Sanglard V, Schäffner K, Scorza S, Shlegel VN, Siebenborn B, Strazzer O, Tcherniakhovski D, Tomei C, Tretyak VI, Umatov VI, Vagneron L, Vasiliev YV, Velázquez M, Vignati M, Weber M, Yakushev E, and Zolotarova AS
- 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 ., (© The Author(s) 2017.)
- Published
- 2017
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