An experiment to search for 2β processes in 116Cd with the help of enriched (to 82%) cadmium tungstate crystal scintillators is in progress at the Gran Sasso National Laboratory of the INFN (LNGS, Italy). After 11074 h of data taking in the last configuration, the preliminary estimate for the half-life of 116Cd relatively to 2ν2β decay is T1/2 = [2.52 ± 0.02(stat.) ± 0.14(syst.)] × 1019 yr. By using the data of previous stages of the experiment with a similar level of background (≈ 0.1 counts/(keV kg yr) in the energy interval 2.7 – 2.9 MeV; the total time of measurements is 19770 h) we have obtained a new limit on the 0ν2β decay of 116Cd to the ground state of 116Sn: T1/2 ≥ 1.9 × 1023 yr at 90% C.L. New limits on different 2β processes in 116Cd (decays with majorons, transitions to the excited levels) are obtained on the level of T1/2 ≥ 1020 – 1022 yr.
Investigation of double beta decay of 116Cd with the help of enriched 116CdWO4 crystal scintillators
O. G. Polischuk, A. S. Barabash, P. Belli, R. Bernabei, F. Cappella, V. Caracciolo, R. Cerulli, D. M. Chernyak, F. A. Danevich, S. d’Angelo, A. Incicchitti, V. V. Kobychev, S. I. Konovalov, M. Laubenstein, V. M. Mokina, D. V. Poda, V. N. Shlegel, V. I. Tretyak, V. I. Umatov, Ya. V. Vasiliev; Investigation of double beta decay of 116Cd with the help of enriched 116CdWO4 crystal scintillators. AIP Conf. Proc. 28 October 2015; 1686 (1): 020017. https://doi.org/10.1063/1.4934906
Download citation file: