Optical properties and gamma-ray response of Czochralski grown Pr:Lu 3Al5O12 scintillating garnet crystals with different Pr content

Takayuki Yanagida, Mitsuhiro Sato, Kei Kamada, Yutaka Fujimoto, Yuui Yokota, Akira Yoshikawa, Valery Chani

研究成果: Article査読

41 被引用数 (Scopus)

抄録

Pr:LuAG single crystalline scintillators with different Pr3+ concentration, 0.1, 0.18, and 0.22 mol% were grown by the Czochralski method. The crystals were cut to dimensions of 2.2 × 2.2 × 15 mm3 and polished, simulating sensors for Positron Emission Tomography (PET). Their absorption coefficients were examined, and the absorption strength was found to be proportional to the Pr concentration. The α-ray induced emission spectra of the samples demonstrated two emission lines peaking at 310 and 370 nm. The emission intensities in the radio luminescence spectra were also proportional to the Pr content. The absolute light yields and intrinsic energy resolution under γ-ray irradiation were evaluated at +20, 0, and -20 °C using avalanche photodiode as a photodetector. Pr 0.22% doped crystal had strongest light output of 16 400 ph/MeV, and its intrinsic energy resolution was around few % at several hundred keV. When coupled with PMT, the decay time was around 25 ns, and it was almost independent on concentration.

本文言語English
ページ(範囲)413-418
ページ数6
ジャーナルOptical Materials
33
3
DOI
出版ステータスPublished - 2011 1月

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • コンピュータ サイエンス(全般)
  • 原子分子物理学および光学
  • 分光学
  • 物理化学および理論化学
  • 有機化学
  • 無機化学
  • 電子工学および電気工学

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