# First test of a $\mathrm{CdMoO_4}$ scintillating bolometer for neutrinoless double beta decay experiments with $\mathrm{{}^{116}Cd}$ and $\mathrm{{}^{100}Mo}$ nuclides

## TL;DR

This study demonstrates the potential of a cadmium molybdate scintillating bolometer for detecting neutrinoless double beta decay, showing promising energy resolution, event discrimination, and low contamination in initial tests.

## Contribution

First experimental test of a cadmium molybdate bolometer for neutrinoless double beta decay with promising performance indicators.

## Key findings

- Achieved energy resolution from 5 keV to 13 keV across relevant energies.
- Successfully discriminated between alpha and beta/gamma events.
- Low internal contamination of the crystal was confirmed.

## Abstract

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