Converting SrI 2 :Eu 2+ into a near infrared scintillator by Sm 2+ co-doping

R. H.P. Awater, M. S. Alekhin, D. A. Biner, K. W. Krämer, P. Dorenbos*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

16 Citations (Scopus)
29 Downloads (Pure)


The luminescence and scintillation properties of SrI 2 single crystals doped with 5% Eu 2+ and 0.05%, 0.2% and 0.5% Sm 2+ are evaluated. X-ray excited and photoluminescence measurements show energy transfer from excited Eu 2+ ions to Sm 2+ ions. At a concentration of 0.5% Sm 2+ , the luminescence consists almost entirely of 740 nm emission from Sm 2+ 5d-4f transitions. Co-doping SrI 2 :5% Eu 2+ with Sm 2+ provides a novel method to bypass the self-absorption problem encountered in large SrI 2 :Eu 2+ crystals and, at the same time, provides a unique near-infrared emitting scintillator with a light yield of approximately 40,000 photons/MeV.

Original languageEnglish
Pages (from-to)1-4
JournalJournal of Luminescence
Publication statusPublished - 2019

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