An ultrafast X-ray scintillating detector made of ZnO(Ga)

Zhang, Qingmin; Yan, Jun; Deng, Bangjie; Zhang, Jingwen; Lv, Jiayi; Wen, Xie; Gao, Kaixiong

doi:10.1088/1748-0221/12/12/p12033

Cited by 13 publications

(9 citation statements)

References 31 publications

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“…The first (SAO d ) has an average bond distance of 1.43 Å with a double bond character of 1.74, the second (SAO c ) has a 1.50 Å distance and the third (SAO b ) 1.52 Å. These values are in good agreement with the monodentate CIP calculations at the HF/6-31G* and B3LYP/6-31G* levels performed by Zhang et al, [57] with values of 1.43, 1.49, and 1.53 Å, respectively.…”

Section: Quantum Chemistry Calculationssupporting

confidence: 87%

“…Theoretical QC works using DFT approaches with similar values for the first hydration shell at 2.1 Å. [52,57] The RDF of the · OH (see Figure 3B) shows that although it is dispersed into the water region, it prefers to be located as close as 4.5 Å from Mg. This distance is similar to that of the second coordination sphere of water (see Figure 3A).…”

Section: Molecular Dynamics Calculationsmentioning

confidence: 98%

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Magnesium sulfate against oxidative damage of membrane lipids: A theoretical model

et al. 2017

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The role of magnesium sulfate as an inhibitor of lipid peroxidation has been poorly understood, although this salt has been intensively used in a wide range of diseases related to lipid peroxidation, for example, preeclampsia. Classical molecular dynamics (MD) simulations of a lipid bilayer in the presence of •OH radicals and MgSO4 were performed to study their effects on membrane properties. Additionally, quantum chemistry (QC) calculations for MgSO4, •OH, MgSO4•OH, [MgSO4(H2O)4], and [MgSO4(H2O)4•OH] were performed to analyze the interactions between •OH…Mg. The MD results showed that the Mg salt is hydrated, forming a contact ion pair (CIP) that is adsorbed on the membrane surface close to phosphate groups. Comparisons of MD calculations for MgO distances indicate good agreement with theoretical QC and experimental studies. MD results also reveal that MgSO4 increases the thickness and the compressibility modulus of the membrane, indicating that it is less compressible. In contrast, DFT calculations show important •OH…MgSO4 interactions in hydrated systems that inhibit the radical action by resonance in the SO4= group (smearing the spin density). These results, together with the reported experimental findings of •OH high mobility in water and fast water exchange in Mg+2, may explain the MgSO4 protective effect against lipid peroxidation on cellular membranes.

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Section: Quantum Chemistry Calculationssupporting

confidence: 87%

Section: Molecular Dynamics Calculationsmentioning

confidence: 98%

Magnesium sulfate against oxidative damage of membrane lipids: A theoretical model

et al. 2017

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“…The fluorescence spectrum with wavelength ranging from 380 nm to 410 nm and a center wavelength of 392 nm was measured, its FWHM and rising time were 153.51 ps and 104.93 ps, respectively, which means that a femtosecond ultraviolet laser system should be used for their measurement [132]. In addition, Ma, OuYang, and Zhang et al [133][134][135][136][137] conducted much research on the application of ZnO:Ga scintillation crystals prepared by magnetron sputtering in pulsed radiation detection, as shown in Table 7. Table 7.…”

Section: The Application Research Status Of Zno:ga In Nuclear Detectionmentioning

confidence: 99%

Magnetron Sputtering for ZnO:Ga Scintillation Film Production and Its Application Research Status in Nuclear Detection

2019

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As a wide band-gap and direct transition semiconductor material, ZnO has good scintillation performance and strong radiation resistance, but it also has a serious self-absorption phenomenon that affects its light output. After being doped with Ga, it can be used for the scintillator of ultra-fast scintillating detectors to detect X-ray, gamma, neutron, and charged particles with extremely fast response and high light output. Firstly, the basic properties, defects, and scintillation mechanism of ZnO crystals are introduced. Thereafter, magnetron sputtering, one of the most attractive production methods for producing ZnO:Ga film, is introduced including the principle of magnetron sputtering and its technical parameters’ influence on the performance of ZnO:Ga. Finally, ZnO:Ga film’s application research status is presented as a scintillation material in the field of radiation detection, and it is concluded that some problems need to be urgently solved for its wider application.

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“…Due to a wide range of different morphologies, a multitude of synthesis methods was suggested, such as a microwave-assisted method [14], hydrothermal method [15], solvothermal method [16], etc. Most of the further research was directed toward the effective quenching of GL [17,18]. Along with that, fast NBE luminescence still plays the main role.…”

Section: Introductionmentioning

confidence: 99%

Ultraviolet Luminescence of ZnO Whiskers, Nanowalls, Multipods, and Ceramics as Potential Materials for Fast Scintillators

et al. 2021

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The presented work is dedicated to the study and comparison of scintillating properties of zinc oxide samples prepared in different morphologies: whiskers, nanowalls, multipods, and ceramics. It was shown that total transmittance, photo- and radioluminescence spectra, and radioluminescence kinetics can vary significantly depending on sample structure and preparation conditions. The highest total transmittance was registered for ZnO ceramics (>50% at 0.5 mm thickness). Differences in the transmittance of whiskers, nanowalls, and multipods can be attributed to their shape and thickness which affects the amount of light refraction and scattering. The study of radioluminescence demonstrated that all samples, except undoped ceramics and air annealed whiskers, have predominantly fast luminescence with a decay time <1 ns. High transmittance of ceramics opens the way for their use in the registration of high energy X-ray and gamma radiation, where a large volume of scintillators is required. In cases, where large scintillator thickness is not a necessity, one may prefer to use other ZnO structures, such as ensembles of whiskers and nanowalls. Studies of near-band-edge luminescence components at low temperatures showed that the structure is quite similar in all samples except Ga doped ceramics.

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An ultrafast X-ray scintillating detector made of ZnO(Ga)

Cited by 13 publications

References 31 publications

Magnesium sulfate against oxidative damage of membrane lipids: A theoretical model

Magnesium sulfate against oxidative damage of membrane lipids: A theoretical model

Magnetron Sputtering for ZnO:Ga Scintillation Film Production and Its Application Research Status in Nuclear Detection

Ultraviolet Luminescence of ZnO Whiskers, Nanowalls, Multipods, and Ceramics as Potential Materials for Fast Scintillators

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