Spectroscopic properties and luminescence behavior of γ-irradiated Sm3+ doped oxy-fluoride phosphate glasses

Hamdy, Y.M.; Bahammam, S.; All, Suzy Abd El; Ezz-Eldin, F.M.

doi:10.1016/j.rinp.2017.03.007

Cited by 11 publications

(1 citation statement)

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“…Thus, it is possible that the radiation treatment changes the local environment of the Yb 3+ and stabilizes the centers that quench the radiative de-excitation of Yb 3+ ions partly. Alternatively, photo-ionization of the RE has been observed in [56] for Sm 3+ in gamma-irradiated oxyfluorophosphate glass, for example, so, therefore, reduction of Yb 3+ to Yb 2+ must be considered. A decrease in the intensity of the Yb 3+ emission was reported in silica glass [4] and in germanate crystals [57] after radiation treatment, confirming that photo-darkening might also occur in the investigated phosphate, borosilicate, and germanate glasses.…”

Section: Radiation Type Particle Energy (Mev) Doses (Gy) Penetration ...mentioning

confidence: 99%

Response of Various Yb3+-Doped Oxide Glasses to Different Radiation Treatments

et al. 2022

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The radiation effects of electrons and protons on the spectroscopic and optical properties of oxide glasses doped with Yb3+ in various glass systems were investigated to understand the impact of the glass composition on the glass photo-response. Changes in the optical and emission properties were seen after the radiation treatment, and the magnitude of the changes depended on the irradiation source and dose. For all the investigated materials, the absorption coefficients in the 200–550 nm range increase post-irradiation, revealing the formation of defects in the glasses during the irradiation. While the spectroscopic properties of the tellurite glass remain unchanged, a small reduction in the Yb3+ emission intensity was seen after irradiating the phosphate, borosilicate, and germanate glasses, indicating that a reduction of Yb3+ to Yb2+ might occur in these glasses during the radiation treatment. The changes in the optical and spectroscopic properties after proton irradiation are small as they are localized at the surface of the glasses due to the shallow penetration depth of the proton in the glass. Even though the doses are small, the electron irradiation produces larger changes in the optical and spectroscopic properties since the electrons penetrate the entire volume of the glasses. All the changes in the optical and spectroscopic properties of the glasses were successfully reversed after a short heat treatment revealing the reversible nature of the photo-response of the investigated glasses.

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Section: Radiation Type Particle Energy (Mev) Doses (Gy) Penetration ...mentioning

confidence: 99%