Crystal Growth and Scintillation Properties of Eu2+ doped Cs4CaI6 and Cs4SrI6

L. Stand, M. Zhuravleva, B. Chakoumakos, J. Johnson, M. Loyd, Y. Wu, M. Koschan, C. L. Melcher

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34 Scopus citations

Abstract

In this work we present the crystal growth and scintillation properties of two new ternarymetal halide scintillators activated with divalent europium, Cs4CaI6 and Cs4SrI6. Single crystals of each compound were grown in evacuated quartz ampoules via the vertical Bridgman technique using a two-zone transparent furnace. Single crystal X-ray diffraction experiments showed that both crystals have a trigonal (R-3c) structure, with a density of 3.99 g/cm3 and 4.03 g/cm3. The radioluminescence and photoluminescence measurements showed typical luminescence properties due to the 5d-4f radiative transitions in Eu2+. At this early stage of development Cs4SrI6:Eu and Cs4CaI6:Eu have shown very promising scintillation properties, with light yields and energy resolutions of 62,300 ph/MeV and 3.3%, and 51,800 photons/MeV and 3.6% at 662 keV, respectively.

Original languageEnglish
Pages (from-to)162-168
Number of pages7
JournalJournal of Crystal Growth
Volume486
DOIs
StatePublished - Mar 15 2018

Funding

This work was supported by the US Department of Homeland Security, Domestic Nuclear Detection Office , under grant # 2014-DN-077-ARI088-03 and grant # 2012-DN-077-ARI067-05 . This support does not constitute an express or implied endorsement on the part of the Government. Research at Oak Ridge National Laboratory was sponsored by the Scientific User Facilities Division, Office of Basic Energy Sciences, US Department of Energy. This support does not constitute an express or implied endorsement on the part of the Government.

Keywords

  • A2. Bridgman technique
  • A2. Single crystal growth
  • B1. Calcium compounds
  • B1. Halides
  • B2. Scintillator materials

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