New limits on 2β processes in 106Cd. Issue 6 (May 2016)

• Record Type: Journal Article
• Authors: Tretyak, V I; Belli, P; Bernabei, R; Brudanin, V B; Cappella, F; Caracciolo, V; Cerulli, R; Chernyak, D M; Danevich, F A; d'Angelo, S; Di Marco, A; Incicchitti, A; Laubenstein, M; Mokina, V M; Poda, D V; Polischuk, O G; Tupitsyna, I A
• Is Part Of: Journal of physics. Volume 718:Issue 6(2016)
• Publication Date: 2016-05
• Subjects: Physics -- Congresses; 530.5
• DOI: 10.1088/1742-6596/718/6/062062
• Languages: English
• ISSNs: 1742-6588

Abstract

Abstract: 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 (2 β ) decay processes in 106 Cd. New improved half-life limits on the 2 β processes in 106 Cd have been set on the level of 10 20 — 10 21 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, T εβ+2 1/2 ≥ 1.1 × 10 21 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 T 2ε0v 1/2 ≥ (8.5 × 10 20 - 1.4 × 10 21 ) yr.