The characterization of Eu2-doped mixed alkaline-earth iodide scintillator crystals

John S. Neal; Lynn A. Boatner; Joanne O. Ramey; Dariusz Wisniewski; James A. Kolopus; Nerine J. Cherepy; Stephen A. Payne

doi:10.1016/j.nima.2011.04.010

The characterization of Eu²-doped mixed alkaline-earth iodide scintillator crystals

John S. Neal, Lynn A. Boatner, Joanne O. Ramey, Dariusz Wisniewski, James A. Kolopus, Nerine J. Cherepy, Stephen A. Payne

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

Abstract

The high-performance inorganic scintillator, SrI₂:Eu ², when activated with divalent europium in the concentration range of 36%, has shown great promise for use in applications that require high-energy-resolution gamma-ray detection. We have recently grown and tested crystals in which other alkaline-earth ions have been partially substituted for strontium ions. Specifically, europium-doped single crystals have been grown in which up to 30 at% of the strontium ions have been substituted for by barium, magnesium, or calcium ions. In the case of the strontium iodide scintillator host, a material that is characterized by an orthorhombic crystal structure, three other column IIA elements are obvious choices for investigations intended to realize potential improvements in the performance of SrI₂:Eu ²-based scintillators via the replacement of strontium ions with Mg², Ca², or Ba². Light yields up to 81,400 photons/MeV with an associated energy resolution of 3.7% (fwhm for 662 keV gamma rays) have been observed in the case of partial substitution of Ba² for Sr². The measured decay times ranged from 1.1 to 2.0 μs, while the peak emission wavelengths ranged from 432 to 438 nm.

Original language	English
Pages (from-to)	75-78
Number of pages	4
Journal	Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume	643
Issue number	1
DOIs	https://doi.org/10.1016/j.nima.2011.04.010
State	Published - Jul 1 2011

Funding

This research was carried out in the Center for Radiation Detection Materials and Systems at ORNL and was supported in part by the Division of Materials Sciences and Engineering, Office of Basic Energy Sciences, US Department of Energy and the Domestic Nuclear Detection Office in the Department of Homeland Security.

Keywords

Crystals
Detection
Gamma-ray
Radiation
Scintillator

Access to Document

10.1016/j.nima.2011.04.010

Cite this

Neal, J. S., Boatner, L. A., Ramey, J. O., Wisniewski, D., Kolopus, J. A., Cherepy, N. J., & Payne, S. A. (2011). The characterization of Eu²-doped mixed alkaline-earth iodide scintillator crystals. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 643(1), 75-78. https://doi.org/10.1016/j.nima.2011.04.010

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Neal, JS, Boatner, LA, Ramey, JO, Wisniewski, D, Kolopus, JA, Cherepy, NJ & Payne, SA 2011, 'The characterization of Eu²-doped mixed alkaline-earth iodide scintillator crystals', Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, vol. 643, no. 1, pp. 75-78. https://doi.org/10.1016/j.nima.2011.04.010

The characterization of Eu²-doped mixed alkaline-earth iodide scintillator crystals. / Neal, John S.; Boatner, Lynn A.; Ramey, Joanne O. et al.
In: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 643, No. 1, 01.07.2011, p. 75-78.

Research output: Contribution to journal › Article › peer-review

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