THE INFLUENCE OF NEUTRON IRRADIATION ON ACTIVATOR GLOW IN A Lu 2 SiO 5 :Ce CRYSTAL
Downloads
A study was carried out of the optical absorption spectra of a cerium-doped scintillation crystal Lu 2 SiO 5 :Ce before and after
irradiation with fast neutrons in the fluence range of 10 15 –5∙10 17 cm −2 in a reactor, as well as during irradiation with gamma
rays of a 60 Co source with a dose of 5∙10 7 Gy. Neutron irradiation showed that induced defects are more intensely generated
at neutron fluences >10 15 cm-2 than when irradiated with γ-quanta with a dose of 5·10 7 Gy. With an increase in neutron
fluence, a decrease in the intensity of the photoexcitation bands at 4.7 and 4.2 eV of Ce 3+ ions is accompanied by an increase
in the absorption coefficient of the bands at 5.2 eV, 4.75 eV, and 4.25 eV.
1. J. Zhu, M. Gu, L. Jia, G. Song, Structural properties of Lu 2 SiO 5 doped with rare-earth elements.Materials Letters 256
(2019) 126410.
2. K.A. McDonald, M.R. McDonald, M.N. Bailey and G.K. Schweitzer, Parametric study on the production of the GAGG: Ce
and LSO:Ce multicomponent oxide scintillator materials through use of a planetary ball mill. Dalton Trans. 47 (2018)
13190–13203
3. C.L. Melcher, M. Schmand, M. Eriksson, L. Eriksson, M. Casey, R. Nutt, J.L. Lefaucheur, B. Chai, Scintillation properties
of LSO:Ce boules IEEE Trans. Nucl. Sci. 47 (2000) 965-968.
4. E. Auffray, A. Barysevich, A. Fedorov, M. Korjik, M. Koschan, M. Lucchini, V. Mechinski, C.L. Melcher, A. Voitovich,
Radiation damage of LSO crystals under γ- and 24 GeV protons irradiation. Nucl. Instrum. Methods. Phys. Res. A 721
(2013) 76-82
5. L. Qin, Yu. Pei, Lu. Sheng, H. Li, Z. Yin, G. A. Ren, Nuclear Instruments and Methods in Physics Research. A545 (2005)
273-278.
6. A.Kh. Islamov, E.M. Ibragimova, Kh.N. Kudratov, and R.R. Vildanov. Effects of Gamma-Induced Defects on the
Activator Glow in the Lu 2 SiO 5 :Ce Scintillator Crystals. Physics of the Solid State. 64 (2022) 11 1746-1755.
7. A.Kh. Islamov, E.M. Ibragimova, I.A. Khayitov, R.R. Vildanov, Kh.N. Kudratov Effect of gamma-quanta and fast
neutrons on color and emission centers in LuAG and LuAG:Pr crystals. Optical Materials 96 (2019) 109344.
Copyright (c) 2026 «ACTA NUUz»
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
.jpg)
1.png)
