A radiopure cadmium tungstate crystal scintillator, enriched in 106-Cd to 66%, with mass of 216 g (106-CdWO4) was used in coincidence with four ultra-low background HPGe detectors contained in a single cryostat to search for double beta decay processes in 106-Cd. New improved half-life limits on the double beta processes in 106-Cd have been set on the level of 1e20-1e21 yr after 13085 h of data taking deep underground (3600 m w.e.) at the Gran Sasso National Laboratories of INFN (Italy). In particular, the limit on the two neutrino electron capture with positron emission T1/2 >1.1e21 yr, has reached the region of theoretical predictions. The resonant neutrinoless double electron captures to the 2718, 2741 and 2748 keV excited states of 106-Pd are restricted on the level of T1/2 > 8.5e20 - 1.4e21 yr.
@article{arxiv.1601.05698,
title = {New limits on double beta processes in 106-Cd},
author = {V. I. Tretyak and P. Belli and R. Bernabei and V. B. Brudanin and F. Cappella and V. Caracciolo and R. Cerulli and D. M. Chernyak and F. A. Danevich and S. d'Angelo and A. Di Marco and A. Incicchitti and M. Laubenstein and V. M. Mokina and D. V. Poda and O. G. Polischuk and I. A. Tupitsyna},
journal= {arXiv preprint arXiv:1601.05698},
year = {2016}
}
Comments
5 pages, submitted to proceedings of the TAUP'2015 Conference