FTIR and UV–VIS optical absorption spectra of gamma-irradiated MoO3-doped lead borate glasses

Structure and optical properties of MoO3-doped lead borate glasses which contain high PbO content (60, 70 and 80%) have been studied using Fourier transform infrared (FTIR) and ultraviolet–visible (UV–VIS) spectroscopic tools. FTIR spectra reveal absorption bands which are characteristic for various...

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Bibliographic Details
Published in:Journal of non-crystalline solids 2012-01, Vol.358 (2), p.406-413
Main Author: Abo-Naf, Sherief M.
Format: Article
Language:English
Subjects:
Absorption spectra
Borates
Charge transfer
Condensed matter: structure, mechanical and thermal properties
Disordered solids
Exact sciences and technology
FTIR
Gamma irradiation
Gamma rays
Glass
Glasses
Lead borate glass
Molybdenum
MoO3-doping
Networks
Physical radiation effects, radiation damage
Physics
Structure of solids and liquids
crystallography
UV–VIS
γ ray effects
γ-Irradiation
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Summary:Structure and optical properties of MoO3-doped lead borate glasses which contain high PbO content (60, 70 and 80%) have been studied using Fourier transform infrared (FTIR) and ultraviolet–visible (UV–VIS) spectroscopic tools. FTIR spectra reveal absorption bands which are characteristic for various structural units of borate network, mainly BO3 triangles and BO4 tetrahedra, in addition to the PbOn (where n=3 and/or 4) structural units. UV–VIS optical absorption spectra reveal broad intense charge transfer UV bands due to Pb2+ ions in the range 320–385nm. Within this range, molybdenum ions, preferably Mo3+ and Mo5+, can interfere at about 360–385nm. Additionally, molybdenum ions give a weak visible band at about 850–860nm. The optical absorption spectra of the studied glasses show marked resistance to successive gamma irradiation up to 5Mrad. This shielding behavior can be related to the present high content of the high atomic mass Pb2+ ions. Changes in the atomic structure before and after gamma irradiation are described and explained. ► FTIR and UV–VIS optical absorption spectra of MoO3-doped lead borate glasses containing 60–80wt.% PbO have been studied. ► Optical absorption spectra of the studied glasses show marked resistance to successive gamma irradiation up to 5Mrad. ► This shielding behavior can be related to the present high content of the high atomic mass Pb2+ ions. ► Changes in the atomic structure before and after gamma irradiation are described and explained.
ISSN:0022-3093
1873-4812
DOI:10.1016/j.jnoncrysol.2011.10.013