Crystal growth of high-purity NaI(Tl)

DOI
  • Fushimi K.
    Graduate School of Technology, Industrial and Social Sciences, Tokushima University
  • Chernyak D.
    Department of Physics and Astronomy, University of Alabama
  • Ejiri H.
    Research Center for Nuclear Physics, Osaka University
  • Hata K.
    Research Center for Neutrino Science, Tohoku University
  • Hazama R.
    Department of Environmental Science and Technology, Osaka Sangyo University
  • Iida T.
    Faculty of Pure and Applied Sciences, University of Tsukuba
  • Ikeda H.
    Research Center for Neutrino Science, Tohoku University
  • Imagawa K.
    I. S. C. Lab.
  • Inoue K.
    Research Center for Neutrino Science, Tohoku University Kavli Institute for the Physics and Mathematics of the Universe (WPI)
  • Ito H.
    Department of Physics, Faculty of Science and Technology, Tokyo University of Science
  • Kisimoto T.
    Department of Physics, Osaka University
  • Koga M.
    Research Center for Neutrino Science, Tohoku University Kavli Institute for the Physics and Mathematics of the Universe (WPI)
  • Kotera K.
    Graduate School of Advanced Technology and Science, Tokushima University
  • Kozlov A.
    National Research Nuclear University “MEPhI” (Moscow Engineering Physics Institute)
  • Nakamura K.
    Kavli Institute for the Physics and Mathematics of the Universe (WPI) Butsuryo College of Osaka
  • Orito R.
    Graduate School of Technology, Industrial and Social Sciences, Tokushima University
  • Shima T.
    Research Center for Nuclear Physics, Osaka University
  • Takemoto Y.
    Kavli Institute for the Physics and Mathematics of the Universe (WPI) Institute for Cosmic Ray Research, The University of Tokyo
  • Umehara S.
    Research Center for Nuclear Physics, Osaka University
  • Urano Y.
    Graduate School of Advanced Technology and Science, Tokushima University
  • Yamamoto Y.
    Graduate School of Technology, Industrial and Social Sciences, Tokushima University
  • Yasuda K.
    I. S. C. Lab.
  • Yoshida S.
    Department of Physics, Osaka University

Bibliographic Information

Other Title
  • 高純度ヨウ化ナトリウムの結晶育成

Description

<p>  Highly radiopure NaI(Tl) crystal has been developed to investigate cosmic dark matter. The dark matter problem is one of the essential subjects in particle physics and cosmology. Despite the many null results in the dark matter search, one group (DAMA/LIBRA) reported a significant annual modulation in the energy spectrum, which can be interpreted as the dark matter signal. This unknown signal must be a purer NaI(Tl) crystal. The PICOLON project has developed a highly radiopure NaI(Tl) crystal. They purified the NaI(Tl) crystal with combined methods; re-crystallization and resin. The 40K were effectively removed from the NaI by the re-crystallization method. On the other hand, they successfully removed 210Pb by selecting the appropriate resin. The concentration of radioactive impurities in their NaI(Tl) crystal reached below their goals.</p>

Journal

Details 詳細情報について

  • CRID
    1390294949467369984
  • DOI
    10.19009/jjacg.49-4-03
  • ISSN
    21878366
    03856275
  • Text Lang
    ja
  • Data Source
    • JaLC
  • Abstract License Flag
    Disallowed

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