AMoRE experiment: a search for neutrinoless double beta decay of 100Mo isotope with 40Ca 100MoO4 cryogenic scintillation detector

AMoRE (Advanced Mo based Rare process Experiment) collaboration is going to use calcium molybdate crystals as cryogenic scintillation detector in a search for neutrinoless DBD of Mo-100 isotope. Simultaneous detection of phonons and light will be used to reject internal background. A FWHM resolution of 0.2% in the phonon channel has been achieved with a 0.5 cm(3) crystal. Several (CaMoO4)-Ca-40-Mo-100 crystals (approximate to 0.5 kg) have been developed from enriched Mo-100 and depleted Ca-40 materials. The light yield of these crystals has been shown to be comparable with reference CaMoO4 scintillators for temperatures ranging down to 8 K. The content of dangerous radioisotopes in the crystals is under measurement. The projected sensitivity of the experiment for a 250 kg x years exposure is lim T-1/2 similar to 3 x 10(26) years, which corresponds to the effective Majorana neutrino mass < mv > similar to 0.02 - 0.06 eV.