Sensitivity of GAGG based scintillation neutron detector with SiPM readout

Fedorov, A.; Гуринович, В. И.; Guzov, V.; Dosovitskiy, G.; Korzhik, M.; Kozhemyakin, V. A.; Lopatik, A.; Koзлов, Д.; Mechinsky, V.; Retivov, V. M.

doi:10.1016/j.net.2020.03.012

Cited by 14 publications

(3 citation statements)

References 11 publications

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“…These active detection materials are LYSO 16,31 , BGO 16,28,30 , CdZnTe 19,20,26,37 and LaBr 3 18, 23, 25, 51 crystals. Ce:GAGG 22,24 has not been included in the study but its neutron sensitivity could be even higher due to the presence of Gd, featuring one of the largest known thermal cross sections 52 .…”

Section: Impact Of Neutron-induced Backgroundsmentioning

confidence: 99%

Towards machine learning aided real-time range imaging in proton therapy

Lerendegui-Marco¹,

Balibrea-Correa²,

Babiano-Súarez³

et al. 2022

Preprint

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Compton imaging represents a promising technique for range verification in proton therapy treatments. In this work, we report on the advantageous aspects of the i-TED detector for proton-range monitoring, based on the results of the first Monte Carlo study of its applicability to this field. i-TED is an array of Compton cameras, that have been specifically designed for neutron-capture nuclear physics experiments, which are characterized by γ-ray energies spanning up to 5-6 MeV, rather low γ-ray emission yields and very intense neutron induced γ-ray backgrounds. Our developments to cope with these three aspects are concomitant with those required in the field of hadron therapy, especially in terms of high efficiency for real-time monitoring, low sensitivity to neutron backgrounds and reliable performance at the high γ-ray energies. We find that signal-to-background ratios can be appreciably improved with i-TED thanks to its light-weight design and the low neutron-capture cross sections of its LaCl 3 crystals, when compared to other similar systems based on LYSO, CdZnTe or LaBr 3 . Its high time-resolution (CRT∼500 ps) represents an additional advantage for background suppression when operated in pulsed HT mode. Each i-TED Compton module features two detection planes of very large LaCl 3 monolithic crystals, thereby achieving a high efficiency in coincidence of 0.2% for a point-like 1 MeV γ-ray source at 5 cm distance. This leads to sufficient statistics for reliable image reconstruction with an array of four i-TED detectors assuming clinical intensities of 10 8 protons per treatment point. The use of a two-plane design instead of three-planes has been preferred owing to the higher attainable efficiency for double time-coincidences than for threefold events. The loss of full-energy events for high energy γ-rays is compensated by means of Machine-Learning based algorithms, which allow one to enhance the signal-to-total ratio up to a factor of 2.

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Section: Impact Of Neutron-induced Backgroundsmentioning

confidence: 99%

Towards machine learning aided real-time range imaging in proton therapy

Lerendegui-Marco¹,

Balibrea-Correa²,

Babiano-Súarez³

et al. 2022

Preprint

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“…These materials have been extensively applied in various domains, including high-energy physics experiments, medical diagnostics, radiation detection, and additional related fields. Conventionally, crystal and ceramic scintillators, such as CsI, BGO, (Lu,Y) 2 SiO 5 (LYSO), Gd 2 O 2 S, and Gd 3 (Al, Ga) 5 O 12 , have been widely employed. − However, the fabrication process for these traditional scintillation materials necessitates high crystallization temperatures and prolonged processing durations . Consequently, this results in a high cost for these materials.…”

Section: Introductionmentioning

confidence: 99%

Optimized Gd₂O₂S:Pr Scintillation Films for X-ray Flat Panel Imaging: Balancing Enhanced Efficiency with Flexibility

Du,

Sun,

Zhuang

et al. 2024

ACS Appl. Opt. Mater.

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Scintillation materials are pivotal in diverse applications, such as medical diagnostics and radiation detection. Traditional methods for producing solid scintillators typically require high crystallization temperatures and prolonged processing times, which lead to elevated costs. Additionally, their intrinsic structural rigidity limits the development of specialized structures and large-scale detectors. In this study, we synthesized a Gd 2 O 2 S:Pr phosphor using the hot water bath reduction method and enhanced its microstructural and luminescent properties by incorporating various fluxes. We then created a flexible organic− inorganic composite scintillation film composed of Gd 2 O 2 S:Pr phosphors and polydimethylsiloxane (PDMS). This Gd 2 O 2 S:Pr− PDMS composite scintillation film demonstrated remarkable flexibility and a significantly enhanced XEL integral intensity compared to the commercial Bi 4 Ge 3 O 12 (BGO) scintillation crystal. Remarkably, X-ray imaging with the Gd 2 O 2 S:Pr composite scintillation film as a detector enabled clear visualization of the chip's internal structure. These findings underscore the significant potential of the prepared Gd 2 O 2 S:Pr−PDMS composite scintillation film for large-scale X-ray flat panel imaging applications.

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“…The host material used in this study was gadolinium aluminum gallium garnet (GAGG), with the formula Gd 3 Al 2 Ga 3 O 12 . GAGG:Ce garnets exhibited the brightest light yields of 46,000 ph/MeV among other oxide crystalline scintillators [13,14]. Despite the fact that there is a wide variety of dopant ions used in scintillator production, GAGG is mostly doped just by Ce 3+ ions [15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Characterization of GAGG Doped with Extremely Low Levels of Chromium and Exhibiting Exceptional Intensity of Emission in NIR Region

et al. 2021

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Cerium and chromium co-doped gadolinium aluminum gallium garnets were prepared using sol-gel technique. These compounds potentially can be applied for NIR-LED construction, horticulture and theranostics. Additionally, magnesium and calcium ions were also incorporated into the structure. X-ray diffraction data analysis confirmed the all-cubic symmetry with an Ia-3d space group, which is appropriate for garnet-type materials. From the characterization of the luminescence properties, it was confirmed that both chromium and cerium emissions could be incorporated. Cerium luminescence was detected under 450 nm excitation, while for chromium emission, 270 nm excitation was used. The emission of chromium ions was exceptionally intense, although it was determined that these compounds are doped only by parts per million of Cr3+ ions. Typically, the emission maxima of chromium ions are located around 650–750 nm in garnet systems. However, in this case, the emission maximum for chromium is measured to be around 790 nm, caused by re-absorption of Cr3+ ions. The main observation of this study is that the switchable emission wavelength in a compound of single phase was obtained, despite the fact that doping with Cr ions was performed in ppm level, causing an intense emission in NIR region.

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Sensitivity of GAGG based scintillation neutron detector with SiPM readout

Cited by 14 publications

References 11 publications

Towards machine learning aided real-time range imaging in proton therapy

Towards machine learning aided real-time range imaging in proton therapy

Optimized Gd₂O₂S:Pr Scintillation Films for X-ray Flat Panel Imaging: Balancing Enhanced Efficiency with Flexibility

Characterization of GAGG Doped with Extremely Low Levels of Chromium and Exhibiting Exceptional Intensity of Emission in NIR Region

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Sensitivity of GAGG based scintillation neutron detector with SiPM readout

Cited by 14 publications

References 11 publications

Towards machine learning aided real-time range imaging in proton therapy

Towards machine learning aided real-time range imaging in proton therapy

Optimized Gd2O2S:Pr Scintillation Films for X-ray Flat Panel Imaging: Balancing Enhanced Efficiency with Flexibility

Characterization of GAGG Doped with Extremely Low Levels of Chromium and Exhibiting Exceptional Intensity of Emission in NIR Region

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Optimized Gd₂O₂S:Pr Scintillation Films for X-ray Flat Panel Imaging: Balancing Enhanced Efficiency with Flexibility