Comparative study of nondoped and Eu-doped SrI2 scintillator

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Published
2016-11
Resource Type
journal article
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  • https://www.elsevier.com/tdm/userlicense/1.0/
  • https://www.elsevier.com/legal/tdmrep-license
  • http://www.elsevier.com/open-access/userlicense/1.0/
  • https://doi.org/10.15223/policy-017
  • https://doi.org/10.15223/policy-037
  • https://doi.org/10.15223/policy-012
  • https://doi.org/10.15223/policy-029
  • https://doi.org/10.15223/policy-004
DOI
  • 10.1016/j.optmat.2016.05.030
Publisher
Elsevier BV

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Abstract Optical and scintillation properties of nondoped and Eu 3% doped SrI 2 crystals grown by the Vertical Bridgman method were investigated. Eu-doped crystal showed an intense single band emission at 430 nm due to the Eu 2+ 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 137 Cs γ-ray irradiations, both crystals showed a clear photoabsorption peak. The scintillation light yields of the nondoped and Eu-doped SrI 2 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 SrI 2 was 8%.

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