Abstract
A search for the double beta decay of zinc and tungsten isotopes has been performed with the help of radiopure ZnWO4 crystal scintillators (0.1–0.7 kg) at the Gran Sasso National Laboratories of the INFN. The total exposure of the low background measurements is 0.529 kg × yr. New improved half-life limits on the double beta decay modes of 64Zn, 70Zn, 180W and 186W have been established at the level of 1018–1021 yr. In particular, limits on double electron capture and electron capture with positron emission in 64Zn have been set: T2ν2K1/2 ⩾ 1.1 × 1019 yr, T0ν2ε1/2 ⩾ 3.2 × 1020 yr, T2νεβ+1/2 ⩾ 9.4 × 1020 yr and T0νεβ+1/2 ⩾ 8.5 × 1020 yr all at 90% CL. Resonant neutrinoless double electron capture in 180W has been restricted on the level of T0ν2ε1/2 ⩾ 1.3 × 1018 yr. A new half-life limit on α transition of 183W to the metastable excited level 1/2− 375 keV of 179Hf has been established: T1/2 ⩾ 6.7 × 1020 yr.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Journal of Physics G: Nuclear and Particle Physics
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
