Journal
RADIATION PHYSICS AND CHEMISTRY
Volume 179, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.radphyschem.2020.109272
Keywords
High energy radiation; Radiation-induced absorption; Absorption spectroscopy; Photoluminescence spectroscopy; Glass material
Funding
- Massey University Research Fund (MURF) [1000021467]
- Osaka University Institute of Laser Engineering (ILE) through the Collaborative Research Program [2019B1-RADUBAN]
- National Research Council of Thailand (NRCT)
- Thailand Science Research and Innovation [TSRI_64_4]
- Chiang Mai University
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The study found that non-doped lithium borosilicate glasses exhibit red shifting of the absorption peak and increased absorption during gamma ray irradiation, while the addition of cerium can improve the transparency of the glass, with different forms of cerium showing varied behavior after irradiation.
Gamma ray irradiation effects on non-doped lithium borate (LBO), lithium borosilicate (LBS), and cerium (Ce)-doped lithium borosilicate glasses (LBS) are investigated. All non-doped lithium borosilicate glasses exhibit gamma ray irradiation damage in the form of red shifting of the optical absorption edge, appearance of an absorption peak between 500 nm and 600 nm, and the overall increase of absorption in the visible wavelength region. The absorption peak underwent a red shift as the optical basicity of the glass samples increased. Further investigation of the behavior of Ce in the form of CeO2 and CeF3 in LBS glass before and after gamma ray irradiation reveal that the addition of Ce improved the overall transparency of LBS after irradiation, whereby the formerly observed absorption peak disappeared with an optimum Ce content between 1 mol% and 3 mol%. Photoluminescence (PL) spectroscopy shows an increase in the PL intensity of CeO2-LBS after gamma ray irradiation but a decrease for CeF3-LBS, alluding to the conversion of Ce3+ to Ce4+.
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