Characterization of CsI(Tl) and LYSO(Ce) scintillator detectors by measurements and Monte Carlo simulations

Mouhti, I.; Elanique, A.; Messous, Y.; Benahmed, A.; McFee, John E.; Elgoub, Y.; Griffith, P.

doi:10.1016/j.apradiso.2019.108878

Cited by 24 publications

(9 citation statements)

References 16 publications

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“…4,5 Conventional activator-doped scintillators, such as thallium-activated CsI (CsI: Tl) and ceriumactivated YAlO3 (YAlO3: Ce) suffered from long radioluminescence afterglow. 6,7 Metal halide perovskite nanocrystals (PNC), which have emerged as a suitable choice for high-performance optoelectronics application, could be a promising candidate for high-efficiency X-ray scintillator. 4,8,9 The heavy metal elements of PNC rendered them a large X-ray absorption cross section, conducive to the attenuation of the incoming X-ray.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Perovskite nanocrystal doped all-inorganic glass for X-ray scintillators

Zhao

Xia

et al. 2021

J. Mater. Chem. C

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Section: Accepted Manuscriptmentioning

confidence: 99%

Perovskite nanocrystal doped all-inorganic glass for X-ray scintillators

Zhao

Xia

et al. 2021

J. Mater. Chem. C

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“…Scintillators have broad applications in space exploration, security inspection, and medical radiography. − Most applied X-ray detectors to date are based on an indirect scintillating process. , Exemplary scintillators include thallium-doped cesium iodide (CsI:Tl) − and cerium-doped lutetium yttrium orthosilicate (Lu 1.8 Y 0.2 SiO 5 -Ce, LYSO). − Besides the toxicity of Tl and the high cost of Lu, the preparation of CsI:Tl films requires a time-consuming vacuum process, and LYSO crystals require high-temperature processing (>1000 °C), causing a manufacturing inconvenience and cost. − Therefore, there is an endeavor for the development of new materials prepared at relatively low temperatures.…”

mentioning

confidence: 99%

All-Inorganic Copper Halide as a Stable and Self-Absorption-Free X-ray Scintillator

Zhao

Niu

Zhu

et al. 2020

J. Phys. Chem. Lett.

153

159

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Lead halide perovskites have recently shown great potential as X-ray scintillators; however, the toxicity of the lead element seriously restricts their applications. Herein we report a new lead-free and self-absorption-free scintillator based on Rb 2 CuCl 3 metal halide. The Rb 2 CuCl 3 exhibits a near-unity photoluminescence quantum yield (99.4%) as well as a long photoluminescence lifetime (11.3 μs). Furthermore, Rb 2 CuCl 3 demonstrates an appreciable light yield of 16 600 photons per megaelectronvolt and a large scintillation response with a linear range from 48.6 nGy air s −1 to 15.7 μGy air s −1 . Notably, the detection limit is as low as 88.5 nGy air s −1 , enabling a reduced radiation dose to the human body when a medical and security check is conducted. In addition, Rb 2 CuCl 3 exhibits good stability against the atmosphere, continuous ultraviolet light, as well as X-ray irradiation. The combination of the decent scintillation performance, low toxicity and good stability suggests the Rb 2 CuCl 3 could be a possible promising X-ray scintillator.

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“…Generally, scintillator materials can be classified as intrinsic (luminescence centers are created by inherent defects in structural units or hosts) or extrinsic (doping appropriate ions to provide luminescence centers) systems, and the emission mechanisms is shown in Figure 1b. [ 64 ] Especially for the latter, when ions that allow radiation transition (such as Ce 3+ , Pr 3+ or Nd 3+ ) are used, [ 65–68 ] high‐quality scintillators can be produced, and efficient and rapid energy transfer from the host material can be achieved. Therefore, the material has a great influence on the performance of the scintillator.…”

Section: Scintillator Materialsmentioning

confidence: 99%

Halide Perovskite, a Potential Scintillator for X‐Ray Detection

et al. 2020

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the coincidence efficiency. This indicates that the solid angle controlled by the PET system and the efficiency of the intrinsic detector are greater. [11,12] More significantly, the Compton events in the pulse height spectrum are mainly caused by scattering in the scintillator. Therefore, these deficiencies can be avoided by lowering the threshold. However, the signal provided by Compton scattering quanta in adjacent crystals may be higher than the threshold, and thus may affect the position resolution and make it worse. In X-ray computed tomography (CT), the body is mainly irradiated continuously from multiple directions by fan-shaped X-rays, while attenuation profiles are recorded, and finally reconstructed from the cross-sectional view of the body. [13] This technology mainly uses complex scanning methods in the field of clinical practice. At present, the realized way of X-rays detector can be roughly divided into two types, direct and indirect. The former one directly absorbs incident X-rays, generates electronic signals through semiconductors or engenders chemical signals through thin films. [14-17] This method can directly convert X-rays into visible light without going through other processes. Therefore, an X-ray detector with a wide linear response range, fast pulse rise time, high-energy resolution, and spatial resolution can be obtained, which makes it copiously applied in X-ray detection. [18-21] However, X-ray detectors based on semiconductors face the challenges of high cost and low efficiency. In addition, although the film is cheap, it is difficult to apply in digital form, which may limit its further development. The latter one refers to the conversion of X-rays (in the highenergy radiation, in addition to X-rays, α, β, and γ rays are also included) into ultraviolet visible (UV) light through scintillators which can be further captured by optical devices. [22-24] It consists of a scintillator and an array photodiode (PD). In contrast, since the scintillator that converts X-rays indirectly is cheap, it is easier to implement in the industry than direct detectors, and has the characteristics of low cost and abundant options, stability, and flexible conversion rate. [25,26] At present, indirect X-ray detectors are widely used in ordinary flat panel X-ray detectors. Moreover, it can be flexibly combined with commercially mature sensor arrays (e.g., amorphous silicon PDs, thin film transistor arrays, photomultiplier tubes, complementary metal oxide semiconductors, silicon avalanche PDs, and X-ray imaging charge-coupled devices [CCD]), therefore, they have attracted more attention. Scintillator is a unique class of luminescent materials, which is extensively used in many fields such as nondestructive testing, medical imaging, space probes, etc. Compared with the disadvantages of traditional scintillator materials which have high cost, are fragile, have long response time and low spatial resolution disadvantages, metal halide perovskites are considered to be the most potential scintillator materials in ...

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Characterization of CsI(Tl) and LYSO(Ce) scintillator detectors by measurements and Monte Carlo simulations

Cited by 24 publications

References 16 publications

Perovskite nanocrystal doped all-inorganic glass for X-ray scintillators

Perovskite nanocrystal doped all-inorganic glass for X-ray scintillators

All-Inorganic Copper Halide as a Stable and Self-Absorption-Free X-ray Scintillator

Halide Perovskite, a Potential Scintillator for X‐Ray Detection

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