Strontium iodide scintillators for high energy resolution gamma ray spectroscopy

Wilson, Cody M.; Loef, E.V.D. van; Głodo, J.; Cherepy, Nerine J.; Hull, G.; Payne, Stephen A.; Choong, Woon-Seng; Moses, W.W.; Shah, K.S.

doi:10.1117/12.806291

Cited by 35 publications

(27 citation statements)

References 6 publications

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“…3. The observed PL spectrum is consistent with published data [2,3,8]. The XRL spectrum has the same shape.…”

Section: Resultssupporting

confidence: 81%

“…These transitions were observed in the same spectral region in various hosts doped with Eu 2+ , see e.g. [2]. With decreasing wavelength down to 300 nm, the optical transmission decreases rapidly and becomes undetectable below 280 nm, Fig.…”

Section: Methodsmentioning

confidence: 68%

“…Some properties of the SrI 2 Eu 2+ scintillator that make it desirable for gamma-ray detection include: a high light yield of (9÷12)×10 4 photons/MeV, an excellent light yield proportionality, an energy resolution of <2.7% FWHM at 662 keV, Z = 50, a monoexponential decay kinetics with τ = 1.2 μs, an emission band of 410-450 nm (2.7-3.0 eV) that is well-matched to bialkali PMTs and no intrinsic radioactivity [2][3][4][5]. The orthorhombic crystal structure, space group Pbca, contains 24 atoms per unit cell with eight equivalent Sr atoms and two inequivalent sets of eight I atoms.…”

Section: Introductionmentioning

confidence: 99%

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A luminescence spectroscopy study of scintillation crystals SrI2 doped with Eu2+

et al. 2012

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We report experimental study of luminescent properties of modern scintillation material SrI 2 :Eu 2+ carried out over the temperature range from 9 to 450 K by the means of the ultraviolet and vacuum ultraviolet spectroscopy with a time resolution. Photoluminescence of the Eu 2+ ions at 2.85 eV was studied under both the intracenter and interband excitations, including an X-ray excitation. The bandgap of the SrI 2 crystal has been estimated on the basis of the obtained results. In the temperature range below 100 K the intrinsic luminescence at 3.4 eV was revealed and this emission band was assigned by its properties to the luminescence of selftrapped anionic excitons in SrI 2 . The pronounced manifestation of the effect of multiplication of electronic excitations was revealed in the energy range above 2E g .

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“…3. The observed PL spectrum is consistent with published data [2,3,8]. The XRL spectrum has the same shape.…”

Section: Resultssupporting

confidence: 81%

Section: Methodsmentioning

confidence: 68%

Section: Introductionmentioning

confidence: 99%

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A luminescence spectroscopy study of scintillation crystals SrI2 doped with Eu2+

et al. 2012

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“…Small crystals (<1 cm 3 ) of SrI 2 (Eu) have been found to provide an energy resolution at 662 keV of 2.5-2.8% [6][7][8][9]. Figure 1 shows a small crystal of SrI 2 (Eu) offering 662 keV energy resolution comparable to that of LaBr 3 (Ce).…”

Section: Resultsmentioning

confidence: 89%

“…Alkaline earth halides are a class of scintillators that appear promising with regards to materials cost, growth, and scintillation yields [1][2][3][4]. We have recently found that single crystal divalent Eu-doped Strontium Iodide yields >100,000 photons/MeV in the Eu 2+ luminescence band (435 nm central wavelength), with a decay time of ~1.2 µs, and excellent light yield proportionality (and hence intrinsic energy resolution) that is superior to that of Ce-doped lanthanum bromide [5][6][7][8][9]. An ongoing coordinated effort between Fisk University, Oak Ridge National Laboratory, Radiation Monitoring Devices, and Lawrence Livermore National Laboratory seeks to improve Strontium Iodide crystal growth and the performance of prototype detectors, with a device goal of 2% resolution at 662 keV and a crystal size of 3" in length by 3" in diameter.…”

Section: Introductionmentioning

confidence: 99%

Prospects for High Energy Resolution Gamma Ray Spectroscopy with Europium-Doped Strontium Iodide

et al. 2009

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Europium-doped strontium iodide scintillators offer a light yield exceeding 100,000 photons/MeV and excellent light yield proportionality, while at the same time, SrI 2 is readily grown in single crystal form. Thus far, our collaboration has demonstrated an energy resolution with strontium iodide of 2.6% at 662 keV and 7.6% at 60 keV, and we have grown single crystals surpassing 30 cm 3 in size (with lower resolution). Our analysis indicates that SrI 2 (Eu) has the potential to offer 2% energy resolution at 662 keV with optimized material, optics, and read-out. In particular, improvements in feedstock purity may result in crystal structural and chemical homogeneity, leading to improved light yield uniformity throughout the crystal volume, and consequently, better energy resolution. Uniform, efficient light collection and detection, is also required to achieve the best energy resolution with a SrI 2 (Eu) scintillator device.

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New Materials for Radiation Detectors

Kato¹,

Kawaguchi²,

Yanagida³

2022

Phosphors for Radiation Detectors

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Strontium iodide scintillators for high energy resolution gamma ray spectroscopy

Cited by 35 publications

References 6 publications

A luminescence spectroscopy study of scintillation crystals SrI2 doped with Eu2+

A luminescence spectroscopy study of scintillation crystals SrI2 doped with Eu2+

Prospects for High Energy Resolution Gamma Ray Spectroscopy with Europium-Doped Strontium Iodide

New Materials for Radiation Detectors

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