ZnWO_4 crystals as detectors for double beta decay and dark matter experiments

Details ZnWO_4 crystals as detectors for double beta decay and dark matter experiments ZnWO_4 crystals as detectors for double beta decay and dark matter experiments

2004-09-17

arxiv.org/abs/nucl-ex/0409014v1

Nucl.Instrum.Meth.A544:553-564,2005

Physics

Nuclear Physics

Nuclear Experiment

16 pages, 6 figures

Scientific paper

10.1016/j.nima.2005.01.303

Energy resolution, alpha/beta ratio, and the pulse shape discrimination ability of the ZnWO_4 crystal scintillators were studied. The radioactive contamination of a ZnWO_4 crystal was investigated in the Solotvina Underground Laboratory. Possibilities to apply ZnWO_4 crystals for the dark matter and double beta decay searches are discussed. New improved half-life limits on double beta decay in zinc isotopes were established, in particular, for EC\beta^+ decay of 64-Zn as: T_1/2^2nu > 8.9 10^18 yr and T_1/2^0nu > 3.6 10^18 yr, both at 68% CL.

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