Aluminosilicate glasses structure under electron irradiation: An EPR study

Gac, A. Le; Boizot, Bruno; Jégou, Christophe; Peuget, S.

doi:10.1016/j.nimb.2017.06.025

Cited by 14 publications

(7 citation statements)

References 41 publications

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“…A second process is associated with changes in the local environments (creation of non-bridging O and of 3coordinated O, creation of 5-coordinated Al, conversions between charge compensators and network modifiers) which act as brakes on the swelling. Depending on the relative dominance of these two processes, the glass may swell or contract.Recently, damage caused by irradiation with 2.5MeV electrons was studied for a series of glasses composed of SiO2, Al2O3, Na2O, and CaO in varying quantities [11]. Different types of electronic defects were brought to light using EPR (defects like OHC, Al, E' centres), with maximum concentrations for an irradiation dose of 1GGy.…”

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confidence: 99%

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Investigation of alumino-silicate glasses by coupling experiments and simulations: Part II - radiation effects

Delaye

Gac

Macaluso

et al. 2021

Journal of Non-Crystalline Solids

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confidence: 99%

“…Recently, damage caused by irradiation with 2.5MeV electrons was studied for a series of glasses composed of SiO2, Al2O3, Na2O, and CaO in varying quantities [11]. Different types of electronic defects were brought to light using EPR (defects like OHC, Al, E' centres), with maximum concentrations for an irradiation dose of 1GGy.…”

mentioning

confidence: 99%

Investigation of alumino-silicate glasses by coupling experiments and simulations: Part II - radiation effects

Delaye

Gac

Macaluso

et al. 2021

Journal of Non-Crystalline Solids

Self Cite

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“…The observed results from the figure suggest that the order of decrease in the EPR signal relative to the TL signal. The subsequent comparison will be used to calculate the thermal activation energy of the SOHC center within the network, which is the leading cause for these radicals in the TL mechanism [39,40]. In this process, the Si 4+ ions are replaced with two Cr 3+ ions, which leads to weaker Si-O linkages within the network.…”

Section: Correlation -Electron Paramagnetic Resonance and Thermoluminiscencementioning

confidence: 99%

Electron Paramagnetic Resonance, and Thermoluminiscence Mechanism In Radiation Shielding Cr2O3 - Ba(La)2SiO6 Glasses

Guntu¹

2021

Preprint

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The research on Cr2O3 doped SiO2 glasses is well known for advanced dielectrics. However, there are many other valuable properties associated with Cr2O3 inclusive various glasses. In this view, the current research aimed to develop the radiation shielding, elastically rich, and the EPR based Cr2O3 doped Ba(La)2SiO6 glass resource. Electron paramagnetic resonance, radiation shielding, and elastic studies have been employed to investigate the advanced characteristics. Structural characterization suggests glassy behavior with the Cr2O3 undoped glass. Whereas the other involved with Cr2O3 mol% shown with the ceramic behavior. The glass transition phenomena and forming abilities are studied with the help of differential thermal analysis techniques. Elastic studies have been done with the limit on the glasses, which suggests the glasses are flexible for elastic use. The electron paramagnetic resonance reports suggest high order of dipole-dipole super-exchange interaction and rhombohedral distortion within the glasses. Furthermore, we have tested the glasses for radiation shielding properties. The values of mass attenuation coefficient, radiation protection efficiency, mean free path, and energy absorption build-up factor of the glasses are measured and compared with values obtained with the help of standard photon shielding and dosimetry software. The studies indicate that the glasses developed are capable of radiation shielding. Upon 50 kGy, γ - irradiation, the thermoluminescence properties of the glasses are reported. The results found to be interesting, and reveal the resource developed are thermoluminescent at low activation energies. Furthermore, we have tested, the glasses for radiation shielding properties. Moreover, to introduce the detailed correlation between electron paramagnetic resonance, and thermoluminescence phenomenon, we have annealed the glasses under 0 to 300 oC temperature and upon the 0 to 50 kGy, γ - irradiation dose level. The electron paramagnetic resonance and thermoluminescence properties obtained for the glasses are highly correlative.

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“…Boizot found that quartz containing Zr 2 O 3 Zr 3+ defects was formed by irradiation [ 9 ]. MoO 2 in glass-ceramics formed Mo 5+ defects [ 10 ]. Ollier et al [ 11 ] studied TiO 2 -containing borate glass exposed to different layers.…”

Section: Introductionmentioning

confidence: 99%

Optical Properties of Thomson Scattering Diagnostics Lower Window Glass under Laser Irradiation

et al. 2021

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Tokamak diagnostic window glass is an indispensable optical medium in fusion research. The transmittance of the device affects the optical performance and accuracy of the diagnostic system. Especially, the window glass serves as the entrance of the light source while performing the sealing function for the active diagnosis method represented by Thomson scattering diagnostics. In this work, we studied the influence of the laser irradiation and tokamak discharge on the EAST (Experimental Advanced Superconducting Tokamak) Thomson scattering diagnostic borosilicate glass window. Using X-ray photoelectron spectroscopy (XPS) and Raman scattering, we found that carbon-based impurities in the device aggravated the film damage due to laser irradiation, reducing the performance of the coating of the glass. Besides, the laser and the various rays of tokamak discharge generated many point defects in the glass, increasing the light absorption of the glass. These two factors caused the glass transmittance to drop significantly (from 99.99% to 77.62%). In addition, the long-term laser irradiation primarily reduced the transmittance, while environmental rays had a minor impact on the same. This work provides valuable insights into the selection and effective use of glass in optics-based diagnostics.

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Aluminosilicate glasses structure under electron irradiation: An EPR study

Cited by 14 publications

References 41 publications

Investigation of alumino-silicate glasses by coupling experiments and simulations: Part II - radiation effects

Investigation of alumino-silicate glasses by coupling experiments and simulations: Part II - radiation effects

Electron Paramagnetic Resonance, and Thermoluminiscence Mechanism In Radiation Shielding Cr2O3 - Ba(La)2SiO6 Glasses

Optical Properties of Thomson Scattering Diagnostics Lower Window Glass under Laser Irradiation

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