A radiopure cadmium tungstate crystal scintillator, enriched in 106Cd (106CdWO4), was used to search for double beta decay processes in 106Cd in coincidence with an ultra-low background set-up containing four high purity germanium (HPGe) detectors in a single cryostat. The experiment has been completed after 13085 h of data taking. New improved limits on most of the double beta processes in 106Cd have been set on the level of 1020−1021 yr. Tn particular, the half-life limit on the two neutrino electron capture with positron emission, T1/2 ≥ 1.8 × 1021 yr, reached the region of theoretical predictions.
Search for double beta processes in 106Cd with enriched 106CdWO4 crystal scintillator in coincidence with four crystals HPGe detector
F. A. Danevich, P. Belli, R. Bernabei, V. B. Brudanin, F. Cappella, V. Caracciolo, R. Cerulli, D. M. Chernyak, S. D’Angelo, A. Incicchitti, M. Laubenstein, V. M. Mokina, D. V. Poda, O. G. Polischuk, V. I. Tretyak, I. A. Tupitsyna; Search for double beta processes in 106Cd with enriched 106CdWO4 crystal scintillator in coincidence with four crystals HPGe detector. AIP Conf. Proc. 28 October 2015; 1686 (1): 020006. https://doi.org/10.1063/1.4934895
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