Comparative study of nondoped and Eu-doped SrI2 scintillator

Takayuki Yanagida, Masanori Koshimizu, Go Okada, Takahiro Kojima, Junya Osada, Noriaki Kawaguchi

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

Optical and scintillation properties of nondoped and Eu 3% doped SrI2 crystals grown by the Vertical Bridgman method were investigated. Eu-doped crystal showed an intense single band emission at 430 nm due to the Eu2+ 5d-4f transitions in both photoluminescence and scintillation while the nondoped crystal had a complex spectral shape. The latter emission consists of mainly four bands: 360 nm, 540 nm, 410 nm and 430 nm. The origins of 360 nm and 540 nm were self-trapped exciton and unexpected impurity, respectively. The origins of 410 and 430 nm lines were ascribed to F center in different I sites. Under 137Cs γ-ray irradiations, both crystals showed a clear photoabsorption peak. The scintillation light yields of the nondoped and Eu-doped SrI2 resulted 33,000 ph/MeV and 82,000 ph/MeV, respectively. The energy resolution at 662 keV of Eu-doped was 4% while that of the non-doped SrI2 was 8%.

Original languageEnglish
Pages (from-to)119-124
Number of pages6
JournalOptical Materials
Volume61
DOIs
Publication statusPublished - 2016 Nov 1

Keywords

  • Eu
  • Scintillator
  • SrI
  • X-ray
  • γ-ray

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Computer Science(all)
  • Atomic and Molecular Physics, and Optics
  • Spectroscopy
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry
  • Electrical and Electronic Engineering

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