Gamma ray interactions with MoO3-doped lead phosphate glasses

The UV-Visible, Fourier transform infrared (FTIR) and Raman and electron spin resonance (ESR) spectra of undoped lead phosphate and MoO 3 -doped glassy samples have been investigated. The UV-VIS absorption spectra were re-measured after successive gamma irradiation. Before irradiation, undoped sampl...

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Bibliographic Details
Published in:Philosophical magazine (Abingdon, England) England), 2011-01, Vol.91 (3), p.341-356
Main Authors: El Batal, F.H., Abo-Naf, S.M., Marzouk, S.Y.
Format: Article
Language:English
Subjects:
Absorption spectra
Bands
Cross-disciplinary physics: materials science
rheology
ESR
Exact sciences and technology
FTIR
Gamma irradiation
Gamma rays
Glasses (including metallic glasses)
Glassy
Irradiation
lead phosphate glass
Materials science
MoO
Phosphate glass
Physics
Radiation treatments
Raman
Specific materials
Spectra
Treatment of materials and its effects on microstructure and properties
UV-VIS
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Summary:The UV-Visible, Fourier transform infrared (FTIR) and Raman and electron spin resonance (ESR) spectra of undoped lead phosphate and MoO 3 -doped glassy samples have been investigated. The UV-VIS absorption spectra were re-measured after successive gamma irradiation. Before irradiation, undoped sample exhibited strong ultraviolet absorption, which was attributed to co-absorption due to trace iron impurities (mainly Fe 3+ ions) and lead Pb 2+ ions. With the introduction of MoO 3 in progressive amounts, extra visible bands were recorded at about 400-440, 540, 750 and 870 nm. These bands are most likely correlated with the presence of Mo 3+ , Mo 4+ and Mo 5+ ions in the host glass. In the undoped specimen, gamma irradiation produced UV absorption bands that increased slightly with irradiation but no visible bands were recorded. Samples containing high MoO 3 content showed some resistance to irradiation with no bands in the visible region being observed. FTIR absorption spectra of the undoped and MoO 3 -doped samples revealed the formation of metaphosphate and pyrophosphate structural units. Highly MoO 3 -doped samples exhibited additional bands due to molybdate groups. Raman and ESR spectra were in agreement with UV-VIS and IR data, indicating the presence of molybdenum ions in lead phosphate glass, as Mo 3+ , Mo 4+ and Mo 6+ with different ratios. However, such glassy systems favor the trivalent species.
ISSN:1478-6435
1478-6443
DOI:10.1080/14786435.2010.521491