Basic study of single crystal fibers of Pr:Lu3Al 5O12 scintillator for gamma-ray imaging applications

Takayuki Yanagida, Kei Kamada, Noriaki Kawaguchi, Yutaka Fujimoto, Kentaro Fukuda, Yui Yokota, Valery Chani, Akira Yoshikawa

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

Single-crystalline fibers were grown from 0.25, 0.70, and 1.50 mol% Pr-doped Lu3Al5O12 (LuAG) melts by the micro-pulling down (μ-PD) method with a diameter of 0.30.5 mm and a length of about 200 mm. They were cut to 10 mm long specimens, and their scintillation properties, including light yield and decay time profile, were examined. These results were compared with corresponding properties of the specimens (0.8×0.8×10 mm3) cut from the bulk crystals produced by conventional Czochralski (CZ) growth. The μ-PD-grown fibers demonstrated relatively low light yield and had the same decay time constant when compared with those of the samples cut from the CZ-grown crystals. The fiber crystals were used to assemble scintillating arrays with dimensions of Ø 0.5×10 mm2×20 pixels and Ø 0.3×10 mm 2×30 pixels coated by a BaSO4 reflector. After optical coupling with a position sensitive photomultiplier tube, the fiber-based arrays demonstrated acceptable imaging capability with a spatial resolution of about 0.5 mm.

Original languageEnglish
Pages (from-to)256-259
Number of pages4
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume652
Issue number1
DOIs
Publication statusPublished - 2011 Oct 1

Keywords

  • Fiber
  • Gamma-rays
  • LuAG
  • LuAlO
  • Pr
  • Scintillator

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation

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