Email this article Comparison of optical properties and radiation stability of Gd2O3 micro- and nanopowders
- Authors: Mikhailov M.M.1, Goronchko V.A.1, Fedosov D.S.1, Lapin A.N.1, Yuryev S.A.1
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Affiliations:
- Tomsk State University of Control Systems & Radioelectronics
- Issue: No 3 (2024)
- Pages: 44–50
- Section: Articles
- URL: https://journals.rcsi.science/1028-0960/article/view/259392
- DOI: https://doi.org/10.31857/S1028096024030079
- EDN: https://elibrary.ru/hfmkgx
- ID: 259392
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Abstract
The results of comparative studies of the phase composition, diffuse reflectance spectra, radiation-induced absorption spectra, and the integral absorption coefficient of solar radiation upon irradiation of micro- and nanopowders of gadolinium oxide are presented. To assess the radiation resistance of optical properties, the samples were placed in a chamber of an installation simulating space conditions, where diffuse reflection spectra were recorded in the range of 0.2–2.5 μm in a vacuum of 2×10–6 Torr before and after each period of electron irradiation (E = 30 keV, Φ = (1 – 3)×1016 cm–2). Micropowders of rare earth elements are used to increase the radiation stability of materials by absorbing free electrons formed in them during irradiation during their transitions from the d- to f-shell. Nanopowders of rare earth elements added to micropowders of various compounds provide an additional mechanism for increasing radiation stability due to the annihilation of primary defects formed during irradiation on nanoparticles. The work obtained a result opposite to these mechanisms - the radiation stability of micropowder is significantly (more than 4 times) higher compared to nanopowder, due to more intense absorption in the ultraviolet region for nanopowder, caused by its own defects. The paper gives an explanation of the results obtained.
About the authors
M. M. Mikhailov
Tomsk State University of Control Systems & Radioelectronics
Author for correspondence.
Email: membrana2010@mail.ru
Russian Federation, 634000, Tomsk
V. A. Goronchko
Tomsk State University of Control Systems & Radioelectronics
Email: W_Goronchko@mail.ru
Russian Federation, 634000, Tomsk
D. S. Fedosov
Tomsk State University of Control Systems & Radioelectronics
Email: Membrana2010@mail.ru
Russian Federation, 634000, Tomsk
A. N. Lapin
Tomsk State University of Control Systems & Radioelectronics
Email: Membrana2010@mail.ru
Russian Federation, 634000, Tomsk
S. A. Yuryev
Tomsk State University of Control Systems & Radioelectronics
Email: Membrana2010@mail.ru
Russian Federation, 634000, Tomsk
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