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

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.