Measurement of the Anisotropic Response of the ZnWO4Crystal for Developing the Direction-Sensitive Dark Matter Detector

Koichi Ichimura, Hiroyuki Sekiya, Juan W. Pedersen, Akihiro Yamaji, Shunsuke Kurosawa

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


We measured the scintillation light yield of ZnWO4 crystals using a quasi-monochromatic neutron beam energy of 865 keV. Irradiating the neutron beam on two surfaces, which are almost perpendicular to the crystal axis, the light yield of oxygen recoil was measured. The obtained light yield ratio of a neutron recoil to gamma-ray-induced electron recoil for two surfaces was 0.235 ± 0.026 and 0.199 ± 0.020, respectively, which corresponds to 15.3% of anisotropy for 200-keV nuclear recoils of this crystal. This property can be applied to a direction-sensitive dark matter (DM) detector.

Original languageEnglish
Article number9055121
Pages (from-to)894-897
Number of pages4
JournalIEEE Transactions on Nuclear Science
Issue number6
Publication statusPublished - 2020 Jun


  • Calibration measurement techniques
  • instrumentation and measurement
  • scintillators
  • solid scintillation detectors

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering
  • Electrical and Electronic Engineering


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