Search for double beta decay processes in 106Cd with the help of 106CdWO4 crystal scintillator

Abstract

A search for the double beta processes in 106Cd was carried out at the Gran Sasso National Laboratories of the INFN (Italy) with the help of a 106CdWO4 crystal scintillator (215 g) enriched in 106Cd up to 66%. After 6590 h of data taking, new improved half-life limits on the double beta processes in 106Cd were established at the level of 10^{19}-10^{21} yr; in particular, T_{1/2}(2νεβ^+) > 2.1 10^{20} yr, T_{1/2}(2ν2β^+) > 4.3 10^{20} yr, and T_{1/2}(0ν2ε) > 1.0 10^{21} yr. The resonant neutrinoless double electron captures to the 2718 keV, 2741 keV and 2748 keV excited states of 106Pd are restricted to T_{1/2}(0ν2K) > 4.3 10^{20} yr, T_{1/2}(0νKL1) > 9.5 10^{20} yr and T_{1/2}(0νKL3) > 4.3 10^{20} yr, respectively (all limits at 90% C.L.). A possible resonant enhancement of the 0ν2εprocesses is estimated in the framework of the QRPA approach. The radioactive contamination of the 106CdWO4 crystal scintillator is reported.

Minor changes of half-life limits after improving the data analysis; version accepted for publication on Phys. Rev. C

References in corpus (10)

• Double Beta Decay, Majorana Neutrinos, and Neutrino Mass
• Short-range correlations and neutrinoless double beta decay
• Further study of CdWO4 crystal scintillators as detectors for high sensitivity double beta experiments: scintillation properties and pulse-shape discrimination
• Final results of an experiment to search for 2beta processes in zinc and tungsten with the help of radiopure ZnWO4 crystal scintillators
• Search for ${\beta }^{+}$EC and ECEC processes in ${}^{112}$Sn and ${\beta }^{-}{\beta }^{-}$ decay of ${}^{124}$Sn to the excited states of ${}^{124}$Te
• Low background detector with enriched 116CdWO4 crystal scintillators to search for double beta decay of 116Cd
• Experimental study of double beta decay modes using a CdZnTe detector array
• A search for various double beta decay modes of tin isotopes
• New limits on the ${\beta }^{+}$EC and ECEC processes in ${}^{120}$Te
• Proceedings of the 1st International Workshop "Radiopure Scintillators for EURECA" (RPScint'2008)

Cited by in corpus (21)

• Dark Matter investigation by DAMA at Gran Sasso
• Nuclear matrix elements for neutrinoless double-beta decay and double-electron capture
• Final results of the Aurora experiment to study 2$\beta$ decay of ${}^{116}$Cd with enriched ${}^{116}$CdWO${}_4$ crystal scintillators
• Neutrinoless Double-Electron Capture
• Search for $2\beta$ decay of ${}^{106}$Cd with enriched ${}^{106}$CdWO${}_4$ crystal scintillator in coincidence with four HPGe detectors
• CdWO4 crystal scintillators from enriched isotopes for double beta decay experiments
• Radioactive contamination of scintillators
• Search for double beta decay of ${}^{136}$Ce and ${}^{138}$Ce with HPGe gamma detector
• Search for 2β decays of 96Ru and 104Ru by ultra-low background HPGe gamma spectrometry at LNGS: final results
• Search for double beta decay of ${}^{106}$Cd with an enriched ${}^{106}$CdWO${}_4$ crystal scintillator in coincidence with CdWO${}_4$ scintillation counters
• Radiopure tungstate and molybdate crystal scintillators for double beta decay experiments
• First test of an enriched ${}^{116}$CdWO${}_4$ scintillating bolometer for neutrinoless double-beta-decay searches
• Response of CdWO4 crystal scintillator for few MeV ions and low energy electrons
• First search for 2$\epsilon$ and $\epsilon {\beta }^{+}$ processes in ${}^{168}$Yb
• Uncertainties in nuclear transition matrix elements for ${\beta }^{+}{\beta }^{+}$ and $\epsilon {\beta }^{+}$ modes of neutrinoless positron double-$\beta$ decay within PHFB model
• DAMA/LIBRA results and perspectives, Bled 2013
• Searches for neutrinoless double beta decay
• First results of the experiment to search for double beta decay of 106Cd with 106CdWO4 crystal scintillator in coincidence with four crystals HPGe detector
• New limits on double beta processes in 106-Cd
• The half-life of ${}^{212}$Po
• Analysis of published data of electron capture in 7Be in the search for a heavy neutrino in the mass range under 800 keV