Scintillation properties of a 2-inch diameter KCa0.8Sr0.2I3:Eu2+ single crystal

Yuntao Wu, Adam C. Lindsey, Matthew Loyd, Luis Stand, Mariya Zhuravleva, Merry Koschan, Charles L. Melcher

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Inch-sized scintillating crystals are required for practical radiation detectors such as hand-held radio-isotope identification devices. In this work, a transparent and colorless 2-inch diameter KCa0.8Sr0.2I3:0.5mo%Eu2+ single crystal was grown by the vertical Bridgman method, and the scintillation properties of a ∅50mm×45mm long sample were evaluated. The Eu2+5d1-4f emission under X-ray excitation is centered at 472 nm. Its scintillation decay time under 137Cs source irradiation is 2.37μs, and the absolute light output is 51,000 ± 3000 photons/MeV. The energy resolution at 662 keV was evaluated for different orientations of the crystals with respect to the PMT, and the effect of 40K background subtraction on energy resolution was evaluated. The performance of the packaged crystal was also investigated.

Original languageEnglish
Pages (from-to)13-17
Number of pages5
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume866
DOIs
StatePublished - Sep 11 2017
Externally publishedYes

Funding

This work has been supported by the US Department of Homeland Security, Domestic Nuclear Detection Office, under competitively awarded grant # 2012-DN-077-ARI067-06. This support does not constitute an express or implied endorsement on the part of the Government.

Keywords

  • Energy resolution
  • Halides
  • Scintillator
  • Single crystals

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