6th Symposium on Neutrinos and Dark Matter in Nuclear Physics 2018

Study of the neutrinoless double beta decay of Mo-100 with the CUPID-Mo demonstrator

29 Jun 2018, 11:30

30m

IBS HQ, Daejeon, Korea

Oral Plenary Session 2

Speaker

Andrea Giuliani (CSNSM-Orsay and DiSAT-Como)

Description

The LUMINEU project has recently set up a technology for the development of high-performance scintillating bolometers containing the nuclide ${}^{100}$Mo, in the framework of the R&D activities towards the tonne-scale neutrinoless double beta decay ($0\nu 2\beta$) experiment CUPID. Using in particular Li${}_2$${}^{100}$MoO${}_4$ detectors, high energy resolution (~5-6 keV FWHM at 2615 keV), excellent $\alpha$ background rejection (~99.9 %) and extreme radiopurity (below 10 $\mu$Bq/kg U/Th intrinsic activity) have been demonstrated in multiple tests with remarkable reproducibility. Moreover, with only ~0.1 kg$\times$yr of ${}^{100}$Mo exposure, the measured two-neutrino 2$\beta$ decay half-life is one of the most precise values ever reported. As a follow-up of this activity, a demonstrator named CUPID-Mo is ready to collect data in the Modane underground laboratory in France. CUPID-Mo consists of twenty 0.2-kg ${}^{100}$Mo-enriched Li${}_2$MoO${}_4$ scintillating bolometers (containing more than 2 kg of ${}^{100}$Mo) to be operated for at least 0.5 yr, providing a sensitivity to $0\nu 2\beta$ of ${}^{100}$Mo larger than 10${}^{24}$ yr. A prolongation of the experiment and its extension to available ~7 kg of ${}^{100}$Mo are under consideration.

Presentation materials

Slides

NDM2018-Giuliani.pdf