2016/03/31 by P. Belli, R. Bernabei, V. B. Brudanin +22 · 49 citations
Chemistry · Mathematics · Physics and Astronomy · #Chemistry #Combinatorics #Crystallography #Double beta decay #Electron #Electron capture #Mathematics #Neutrino #Neutrino Physics Research #Nuclear physics #Nuclear physics research studies #Particle physics #Particle physics theoretical and experimental studies #Physics #hep-ex #nucl-ex
paper · pdf · doi:10.1103/physrevc.93.045502
published in Physical Review C 93(4) (American Institute of Physics) · 18 pages, 11 figures, 1 table
openalex publication_date 2016/04/11 · arxiv created 2016/04/13 · arxiv updated 2016/04/14 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/06
A radiopure cadmium tungstate crystal scintillator, enriched in 106Cd to 66%, with mass of 216 g (106CdWO4), was used to search for double-\ensuremathβ decay processes in 106Cd in coincidence with four ultra-low-background high-purity germanium detectors in a single cryostat. Improved limits on the double-\ensuremathβ processes in 106Cd have been set on the level of 1020\ensuremath-1021 yr after 13 085 h of data taking. In particular, the half-life limit on the two-neutrino electron capture with positron emission, T1/2^2\ensuremathν\ensuremathε\ensuremathβ+\ensuremath≥1.1\ifmmode×\else\texttimes\fi1021 yr, has reached the region of theoretical predictions. With this half-life limit the effective nuclear matrix element for the 2\ensuremathν\ensuremathε\ensuremathβ+ decay is bounded as Meff^2\ensuremathν\ensuremathε\ensuremathβ+\ensuremath≤1.1. The resonant neutrinoless double-electron captures to the 2718-, 2741-, and 2748-keV excited states of 106Pd are restricted at the level of T1/2\ensuremath≥(8.5\ifmmode×\else\texttimes\fi1020\ensuremath-1.4\ifmmode×\else\texttimes\fi1021) yr.