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Precise measurement of two-neutrino double beta decay half-life of $^{100}$Mo using enriched Li$_{2}$$^{100}$MoO$_{4}$ scintillating crystals

Not scheduled


Dr Vivek Singh (University of California, Berkeley)


We will present the most precise measurement of the two-neutrino double-beta decay of $^{100}$Mo using lithium molybdate scintillating low-temperature calorimeters. We used four highly radiopure and $^{100}$Mo-enriched crystals for the measurement. We developed the detectors under the purview of the CUPID-Mo experiment and operated them in the EDELWEISS-III low-background facility in the Modane underground laboratory. We rejected the contribution of $\alpha$ particles and reduced our background by simultaneously detecting the heat and light channel in the crystal. With a high selection efficiency ($\sim$ 96\%) and an exposure of 42.235 kg$\times$d, we measured the half-life to be T$^{2\nu}_{1/2}$ = [7.12$^{+0.18}_{-0.14}$ (stat.) $\pm$ 0.10 (syst.)] $\times$ 10$^{18}$ years. We will present an overview of experiment, analysis of the background model, and a discussion on the reported systematic errors.


Most precise measurement of $2\nu\beta\beta$ decay half life of 100Mo using cryogenic calorimeters.

Experiment/Collaboration Lumineu/Cupid-Mo collaboration

Primary author

Dr Vivek Singh (University of California, Berkeley)

Presentation materials