High-energy X-ray detection capabilities of Hf-loaded plastic scintillators synthesized by sol–gel method

Kei Kagami, Masanori Koshimizu, Yutaka Fujimoto, Syunji Kishimoto, Rie Haruki, Fumihiko Nishikido, Keisuke Asai

研究成果: Article査読

5 被引用数 (Scopus)

抄録

The high-energy X-ray detection capabilities of hafnium oxide-doped organosilica plastic scintillators were analysed. Plastic scintillators with different concentrations of Hf were synthesized via the sol–gel method. In the photoluminescence emission spectra and X-ray-excited radioluminescence spectra, all of the plastic samples showed broad emission bands peaking between 350 and 500 nm derived from the fluorescence of the organic phosphor b-PBD. The maximum detection efficiency for a thickness of 1 mm towards 67.41 keV high-energy X-ray was estimated to be 6.3% (Hf 10 wt%) which is 3.7 times larger than that of the undoped sample and 1.9 times larger than that of the commercialized Pb 5 wt%-doped plastic scintillator EJ-256. The full width at half maximum time resolutions were estimated to be approximately 0.4 to 0.6 ns, which is almost independent of the Hf concentration of Hf. Therefore, the detection efficiency towards high-energy X-rays was successfully improved while maintaining the original high time resolution of plastic scintillators by adding Hf to the plastic scintillator at high concentrations.

本文言語English
ページ(範囲)896-902
ページ数7
ジャーナルJournal of Materials Science: Materials in Electronics
31
2
DOI
出版ステータスPublished - 2020 1 1

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 原子分子物理学および光学
  • 凝縮系物理学
  • 電子工学および電気工学

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