First test of a large-volume CdMoO4-based low temperature detector for neutrinoless double beta decay search

25 Jul 2019, 17:45
1h 15m
Piazza Città di Lombardia (Milano)

Piazza Città di Lombardia

Milano

Piazza Città di Lombardia, 1, 20124 Milano MI
Poster Low Temperature Detector Applications Poster session

Speaker

Mingxuan XUE (University of Science and Technology of China)

Description

A large cylindrical cadmium molybdate crystal with natural isotopic abundance has been successfully used to fabricate a cryogenic microcalorimeter. The measurement was performed above ground at milli-Kelvin temperature, allowing simultaneous readout of the heat and the scintillation light using NTD-Ge sensors. We present its powerful discrimination capability of $\alpha$ versus $\gamma/\beta$ events. The achieved energy resolution has FWHM from 5 keV (at 238 keV) to 13 keV (at 2615 keV). The low internal trace contamination of the $CdMoO_4$ crystal was evaluated as well. The excellent detector performance with preliminary positive indications proves that cadmium molybdate is an extremely promising detector crystal for neutrinoless double beta decay scintillating bolometric experiments with ${}^{116}Cd$ and ${}^{100}Mo$ nuclides in the next-generation technique.

Less than 5 years of experience since completion of Ph.D Y
Student (Ph.D., M.Sc. or B.Sc.) Y

Primary author

Mingxuan XUE (University of Science and Technology of China)

Presentation Materials