Light‐yield improvement trends in mixed scintillation crystals

Sidletskiy, O.; Gektin, A.; Belsky, A.

doi:10.1002/pssa.201431137

Cited by 35 publications

(15 citation statements)

References 23 publications

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“…The data obtained with the extended amount of mixed crystals (Figure ) confirm the trends noted in the prior study . The tendency to increase of LY with ( R a /R b ) 3 in the range of 1–1.5 (corresponding to the ionic radii ratio 1–1.15) is superseded by the inverse tendency at ( R a /R b ) 3 > 1.5.…”

Section: Phenomenological Approach To Ly Predictionsupporting

confidence: 86%

“…Following the found correlation between LY enhancement and relation of volumes occupied by the substituted atoms, this work extends the phenomenological analysis of LY in scintillators based on solid solutions (mixed crystals). Recently, the essential progress has been achieved in performance of mixed scintillators based on Eu 2+ ‐doped alkali‐earth halogenides, as well as Ce 3+ ‐doped complex oxides.…”

Section: Introductionmentioning

confidence: 53%

“…The deviation of LY dependence from the empirical Vegard's law can be quantified by the L ex /L veg parameter (the details of the procedure are described in ref. ), where L ex is a curve following the experimental points, and L veg is LY in accordance with the Vegard's law. The L ex /L veg parameter equals 1, if LY of intermediate compositions in the solid solution follows the Vegard's law, while L ex /L veg > 1 or <1 at higher or lower LY, correspondingly.…”

Section: Phenomenological Approach To Ly Predictionmentioning

confidence: 99%

“…Another task is to find relationships making it possible to point out to trends that can be exploited in the optimization of LYs of mixed scintillators basing on physical properties of their constituents. Following the correlation between the ratio of volumes occupied by substitutional atoms in mixed crystals and LY enhancement in them, the present work addresses larger amount of experimental data and discusses the correlations between LY and other parameters of mixed scintillators (difference between the band gaps of the components, ratio of the atomic weights of the substitutional atoms).…”

Section: Introductionmentioning

confidence: 99%

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Trends in Search for Bright Mixed Scintillators

Sidletskiy

2018

Physica Status Solidi (a)

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The paper addresses the recent progress in study of light yield behavior in scintillators based on solid solutions (mixed crystals), which are among the brightest known scintillators. Following the prior work [O. Sidletskiy et al., Phys. Status Solidi A 2014, 211, 2384, the extended phenomenological analysis of the correlations between light yield behavior and physical properties of mixed crystals (band gaps of the components, ionic radii, and atomic weights of the substitutional atoms) is carried out. The trend to light yield enhancement is notable in systems with the substitution of atoms in two non-equivalent crystallographic sites in the lattice leading to formation of planes and columns enriched with one of the substitutional atoms. This evidences an important role of nanoscale spatial inhomogeneity (domains or clusters) in scintillation process in mixed scintillators. A roadmap of search for new bright scintillators is proposed basing on the established trends.

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Section: Phenomenological Approach To Ly Predictionsupporting

confidence: 86%

Section: Introductionmentioning

confidence: 53%

Section: Phenomenological Approach To Ly Predictionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Trends in Search for Bright Mixed Scintillators

Sidletskiy

2018

Physica Status Solidi (a)

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“…This ability is enabled by the change in the strength of the crystal field acting on the activator ions and, consequently, by shifting the energy levels of Ce 3+ relative to the bottom of the conduction band. Moreover, optimization of garnet composition serves also for the enhancement of the light yield of these scintillators [14]. The most impressive results have recently been achieved in GAGG:Ce, where the scintillation yield of up to 58000 ph/MeV was demonstrated both in single crystals and transparent ceramics [13,15].…”

Section: Introductionmentioning

confidence: 99%

Free carrier absorption in self-activated PbWO4 and Ce-doped Y3(Al0.25Ga0.75)3O12 and Gd3Al2Ga3O12 garnet scintillators

et al. 2016

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Highlights: Free electrons are generated by short pulse in subpicoseconds in PWO and YAGG:Ce  The relaxation of holes from Gd to valence band in GAGG:Ce takes 5-10 ps  Hole trapping at Gd deteriorates response speed in mixed garnet scintillators Keywords: Scintillators, free carrier absorption, lead tungstate, cerium-doped garnets. AbstractNonequilibrium carrier dynamics in the scintillators prospective for fast timing in high energy physics and medical imaging applications was studied. The time-resolved free carrier absorption investigation was carried out to study the dynamics of nonequilibrium carriers in wide-band-gap scintillation materials: self-activated led tungstate (PbWO4, PWO) ant two garnet crystals, GAGG:Ce and YAGG:Ce. It was shown that free electrons appear in the conduction band of PWO and YAGG:Ce crystals within a sub-picosecond time scale, while the free holes in GAGG:Ce appear due to delocalization from Gd 3+ ground states to the valence band within a few picoseconds after short-pulse excitation. The influence of Gd ions on the nonequilibrium carrier dynamics is discussed on the base of comparison the results of the free carrier absorption in GAGG:Ce containing gadolinium and in YAGG without Gd in the host lattice.

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Transparent Glass Composite Scintillator with High Crystallinity for Efficient Thermal Neutron Detection

Wang,

Zhang,

Chen

et al. 2024

Adv Funct Materials

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The sensitive and rapid detection of thermal neutrons holds significant importance in various fields such as energy utilization, medical treatment, and national defense. However, the available thermal neutron scintillator is difficult to reach this target, mainly limited by the optical and scintillating performance. Herein, the in situ crystallization strategy of glass to construct scintillation glass composites for efficient thermal neutron detection is proposed. The congruent crystallization of the hybridized alkali earth silicate glass system may not only achieve high crystallinity, but also will keep the refractive indexing matching between the precipitated crystal and precursor glass phases. The prepared glass composites feature high luminescence efficiency, optical transmission and excellent neutron response properties. These factors collectively contribute to the robust neutron scintillation performance with a light output of ≈36 000 photons/neutron, which represents the highest value among glass‐based scintillators. Moreover, the composite configuration brings about the additional function of thermal neutron and γ‐ray discrimination. By using this composite scintillator, the neutron detector is constructed and demonstrates its application for detecting thermal neutron and distinguishing it from γ‐ray in an online way. The studies prove that glass composites with high crystallinity are expected to be promising candidates for a new generation of multifunctional neutron detectors.

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Light‐yield improvement trends in mixed scintillation crystals

Cited by 35 publications

References 23 publications

Trends in Search for Bright Mixed Scintillators

Trends in Search for Bright Mixed Scintillators

Free carrier absorption in self-activated PbWO4 and Ce-doped Y3(Al0.25Ga0.75)3O12 and Gd3Al2Ga3O12 garnet scintillators

Transparent Glass Composite Scintillator with High Crystallinity for Efficient Thermal Neutron Detection

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