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Structural and Optical Modifications in the BaO-ZnO-LiF-B2O3-Yb2O3 Glass System after γ-Irradiation

Prabhu NS 1 , Somashekarappa HM 2 , Sayyed MI 3 , Osman H 4 , Alamri S 4 , Khandaker MU 5 Show all authors , Kamath SD 1

Affiliations 

  • 1 Department of Physics, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal 576104, India
  • 2 Centre for Application of Radioisotopes and Radiation Technology (CARRT), Mangalore University, Mangalagangothri 574199, India
  • 3 Department of Physics, Faculty of Science, Isra University, Amman 11622, Jordan
  • 4 Department of Radiological Sciences, College of Applied Medical Sciences, Taif University, Taif 21944, Saudi Arabia
  • 5 Center for Applied Physics and Radiation Technologies, School of Engineering and Technology, Sunway University, Subang Jaya 47500, Malaysia
Materials (Basel), 2021 Nov 17;14(22).
PMID: 34832355 DOI: 10.3390/ma14226955

Abstract

A Yb3+-doped borate glass system was examined for the structural and optical modifications after γ-irradiation. Among the studied 10BaO-20ZnO-20LiF-(50-x)B2O3-xYb2O3 (x = 0.1, 0.5, 0.7, and 1.0 mol%) glasses, the 10BaO-20ZnO-20LiF-49.9B2O3-0.1Yb2O3 glass showed the highest thermoluminescence intensity, trap density, and trap depth. The glass was irradiated with the optimum γ-dose of 1 kGy towards the analysis of radiation-induced defects. The amorphous nature was preserved before and after irradiation. The glass density slightly increased after irradiation. The structural rearrangement was evident from the Fourier transform infrared spectroscopy by the appearance and disappearance of some bonds after γ-irradiation. The transformation of [BO4] units into [BO3] units and non-bridging oxygens was deduced. The color of the glass darkened after irradiation and the optical absorption intensity enhanced between 250 and 700 nm. The optical bandgap reduced and Urbach energy increased upon γ-dose exposure. The electron spin resonance of the irradiated glass exhibited two signals at g = 2.0167 and g = 1.9938, corresponding to the non-bridging oxygen hole center and Boron E'-center, respectively.

* Title and MeSH Headings from MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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