The Performance of Thin NaI(Tl) Scintillator Plate for Dark Matter Search

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  • Fushimi K.
    Faculty of Integrated Arts and Sciences The University of Tokushima
  • Kawasuso H.
    Faculty of Integrated Arts and Sciences The University of Tokushima
  • Aihara E.
    Faculty of Integrated Arts and Sciences The University of Tokushima
  • Hayami R.
    Faculty of Integrated Arts and Sciences The University of Tokushima
  • Toi M.
    Faculty of Integrated Arts and Sciences The University of Tokushima
  • Yasuda K.
    Faculty of Integrated Arts and Sciences The University of Tokushima
  • Nakayama S.
    Faculty of Integrated Arts and Sciences The University of Tokushima
  • Koori N.
    Faculty of Integrated Arts and Sciences The University of Tokushima
  • Nomachi M.
    Department of Physics, Osaka University
  • Ichihara K.
    Department of Physics, Osaka University
  • Hazama R.
    Department of Physics, Osaka University
  • Yoshida S.
    Department of Physics, Osaka University
  • Umehara S.
    Department of Physics, Osaka University
  • Imagawa K.
    Horiba Ltd.
  • Ito H.
    Horiba Ltd.

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  • Performance of Thin NaI Tl Scintillator Plate for Dark Matter Search

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Abstract

A thin (0.05 cm) and wide area (5×5 cm2) NaI(Tl) scintillator was developed. The performance of the thin NaI(Tl) plate, energy resolution, single photoelectron energy and position sensitivity were tested. An excellent energy resolution of 20% (FWHM) at 60 keV was obtained. The single photoelectron energy was calculated to be approximately 0.42±0.02 keV. Position information in the 5×5 cm2 area of the detector was also obtained by analyzing the ratio of the number of photons collected at opposite ends of the detector. The position resolution was obtained to be 1 cm (FWHM) in the 5×5 cm2 area.

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