Investigation of gamma-ray induced optical property changes in non-doped and Ce-doped lithium-rich oxide glass

https://doi.org/10.1016/j.radphyschem.2020.109272Get rights and content

Highlights

  • Optical basicity of non-doped lithium-rich glass increased after gamma irradiation.

  • Gamma-ray induced absorption peak was red shifted due to increased basicity.

  • Adding 1–3 mol% Ce suppresses the gamma-ray induced absorption peak.

  • Photoluminescence spectroscopy shows conversion of Ce3+ to Ce4+ after irradiation.

  • CeO2-LBS is radiation-hard but CeF3-LBS is more suitable as a scintillator.

Abstract

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+.

Section snippets

Author statement

Youwei Lai: investigation, formal analysis, writing – original draft. Haoze Yu: investigation. Takuya Ishimoto: investigation, formal analysis. Marilou Cadatal-Raduban: Writing – review and editing, supervision, validation. Suchart Kothan: resources. Pruittipol Limkitjaroenporn: resources. Toshihiko Shimizu: Supervision. Nobuhiko Sarukura: supervision. Jakrapong Kaewkhao: resources, conceptualization. Kohei Yamanoi: conceptualization, methodology, supervision, project administration, funding

Declaration of competing interest

The authors declare that they have no known competing financial interestsor personal relationships that could have appeared to influence the work reported in this paper.

Acknowledgements

M. Cadatal-Raduban acknowledges the Massey University Research Fund (MURF) [grant number 1000021467], and the Osaka University Institute of Laser Engineering (ILE) through the Collaborative Research Program [grant number 2019B1-RADUBAN] for the financial support. J. Kaewkhao and P. Limkitjaroenporn thank the National Research Council of Thailand (NRCT) and Thailand Science Research and Innovation (Grant number: TSRI_64_4) for supporting this research. This research was partially supported by

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