Anisotropic response measurements of ZnWO4 scintillators to neutrons for developing a direction-sensitive dark matter detector

Juan W. Pedersen, Hiroyuki Sekiya, Koichi Ichimura

Research output: Contribution to journalArticlepeer-review


The scintillation yields of ZnWO4 crystals change depending on the incident direction of particles. This property can be used as a direction-sensitive dark matter detector, so we investigated the ZnWO4 light yields ratio of neutron-induced nuclear recoils to gamma-ray-induced electron recoils (quenching factor). Two surfaces almost perpendicular to the crystal axis of ZnWO4 were irradiated with a quasi-monochromatic neutron beam of 0.885 MeV, and the quenching factors of both surfaces for the oxygen-nucleus recoil in the ZnWO4 crystal were measured. The obtained quenching factors of the two surfaces were 0.235 ± 0.026 and 0.199 ± 0.020, respectively, confirming 15.3% anisotropy.

Original languageEnglish
Article number023C01
JournalProgress of Theoretical and Experimental Physics
Issue number2
Publication statusPublished - 2020 Feb 28
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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