|
This article is cited in 1 scientific paper (total in 1 paper)
Spectroscopy of condensed matter
Charge transfer between neutron-induced and activator centers in LuAG:Pr single crystal
A. Kh. Islamova, E. M. Ibragimovaa, I. A. Khayitovab, R. R. Vil'danovb a Institute of Nuclear Physics, Academy of Sciences of Uzbekistan, Tashkent
b National University of Uzbekistan named after M. Ulugbek, Tashkent
Abstract:
The spectra of absorption and gamma luminescence and integral thermoluminescence curves (300–605 K) of nominally pure LuAG crystals and praseodymium-doped LuAG:Pr crystals have been analyzed before and after irradiation with fast ($>$ 0.1 MeV) neutrons in the range of fluences of 10$^{15}$–10$^{17}$ cm$^{-2}$. The optical spectra of LuAG:Pr, irradiated with neutrons with a fluence of 10$^{17}$ cm$^{-2}$, after thermal bleaching to 605 K and subsequent $\gamma$ irradiation and illumination in the induced band of 573 nm, indicate the electron transfer from the induced $V_{О}(C_{\operatorname{imp}})$ center to the hole Pr$^{4+}$ center with radiation in Pr$^{3+}$. In the case of high-dose (for the LHC supercollider (HL–LHC)) neutron irradiation at $>$ 300 K, localization of electrons on the induced F$^+$ and $V_{О}(C_{\operatorname{imp}})$ defects and localization of holes on the activator Pr$^{4+}$ centers decrease the intensity of high-speed (20 ns) activator luminescence and induces the occurrence of the long-term component in the recombination process.
Keywords:
lutetium aluminum garnet, neutron induced defects, color centers, $\gamma$-luminescence, thermal glow and luminescence.
Received: 21.01.2021 Revised: 12.03.2021 Accepted: 08.04.2021
Citation:
A. Kh. Islamov, E. M. Ibragimova, I. A. Khayitov, R. R. Vil'danov, “Charge transfer between neutron-induced and activator centers in LuAG:Pr single crystal”, Optics and Spectroscopy, 129:10 (2021), 1249–1256; Optics and Spectroscopy, 130:3 (2022), 180–187
Linking options:
https://www.mathnet.ru/eng/os41 https://www.mathnet.ru/eng/os/v129/i10/p1249
|
Statistics & downloads: |
Abstract page: | 43 | Full-text PDF : | 6 |
|