paper

First scintillating bolometer tests of a CLYMENE R&D on Li $_{2}$ MoO $_{4}$ scintillators towards a large-scale double-beta decay experiment

arXiv:1801.07909 · doi:10.1016/j.nima.2018.02.101

Abstract

A new R&D on lithium molybdate scintillators has begun within a project CLYMENE (Czochralski growth of Li $_{2}$ MoO $_{4}$ crYstals for the scintillating boloMeters used in the rare EveNts sEarches). One of the main goals of the CLYMENE is a realization of a Li $_{2}$ MoO $_{4}$ crystal growth line to be complementary to the one recently developed by LUMINEU in view of a mass production capacity for CUPID, a next-generation tonne-scale bolometric experiment to search for neutrinoless double-beta decay. In the present paper we report the investigation of performance and radiopurity of 158-g and 13.5-g scintillating bolometers based on a first large-mass (230 g) Li $_{2}$ MoO $_{4}$ crystal scintillator developed within the CLYMENE project. In particular, a good energy resolution (2--7 keV FWHM in the energy range of 0.2--5 MeV), one of the highest light yield (0.97 keV/MeV) amongst Li $_{2}$ MoO $_{4}$ scintillating bolometers, an efficient alpha particles discrimination (10 $I ¨ $ ) and potentially low internal radioactive contamination (below 0.2--0.3 mBq/kg of U/Th, but 1.4 mBq/kg of $^{210}$ Po) demonstrate prospects of the CLYMENE in the development of high quality and radiopure Li $_{2}$ MoO $_{4}$ scintillators for CUPID.

13 pages, 4 figures, 2 tables

First scintillating bolometer tests of a CLYMENE R&D on Li2​MoO4​ scintillators towards a large-scale double-beta decay experiment

Abstract

First scintillating bolometer tests of a CLYMENE R&D on Li $_{2}$ MoO $_{4}$ scintillators towards a large-scale double-beta decay experiment