Converting SrI2:Eu2+ into a near infrared scintillator by Sm2+ co-doping

Awater, R.H.P.; Alekhin, M.S.; Biner, Daniel; Krämer, Karl; Dorenbos, P. (2019). Converting SrI2:Eu2+ into a near infrared scintillator by Sm2+ co-doping. Journal of luminescence, 212, pp. 1-4. Elsevier 10.1016/j.jlumin.2019.04.002

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The luminescence and scintillation properties of SrI2 single crystals doped with 5% Eu2+ and 0.05%, 0.2% and 0.5% Sm2+ are evaluated. X-ray excited and photoluminescence measurements show energy transfer from excited Eu2+ ions to Sm2+ ions. At a concentration of 0.5% Sm2+, the luminescence consists almost entirely of 740 nm emission from Sm2+ 5d-4f transitions. Co-doping SrI2:5% Eu2+ with Sm2+ provides a novel method to bypass the self-absorption problem encountered in large SrI2:Eu2+ crystals and, at the same time, provides a unique near-infrared emitting scintillator with a light yield of approximately 40,000 photons/MeV.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Departement of Chemistry and Biochemistry

UniBE Contributor:

Biner, Daniel and Krämer, Karl

Subjects:

500 Science > 530 Physics
500 Science > 540 Chemistry

ISSN:

0022-2313

Publisher:

Elsevier

Language:

English

Submitter:

Karl Krämer

Date Deposited:

02 Sep 2019 09:30

Last Modified:

26 Oct 2019 13:24

Publisher DOI:

10.1016/j.jlumin.2019.04.002

BORIS DOI:

10.7892/boris.132838

URI:

https://boris.unibe.ch/id/eprint/132838

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