R and D of crystal scintillators from enriched isotopes for high sensitivity double β decay experiments

Experiments to search for neutrinoless double beta decay enters to a new phase when a sensitivity on the level of T1/2∼1026−1028 yr is required. Scintillating low temperature detectors possess important properties required for high-sensitivity double beta decay experiments: presence of elements of interest, high energy resolution and detection efficiency, low level of background thanks to excellent particle discrimination ability. High concentration of isotope of interest and as low as possible radioactive contamination are important requirements to crystal scintillators. Other crucial issues are maximal output of detectors and minimal loss of enriched materials. Prospects of several scintillation materials, enriched in isotopes promising for double beta decay experiments, are discussed