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Band Gap Determination from Diffuse Reflectance Measurements of Irradiated Lead Borate Glass System Doped with TiO<sub>2</sub> by Using Diffuse Reflectance Technique
National Center for Radiation Research and Technology, Atomic Energy Authority, Cairo, Egypt
National Center for Radiation Research and Technology, Atomic Energy Authority, Cairo, Egypt
- 1 National Center for Radiation Research and Technology, Atomic Energy Authority, Cairo, Egypt
- 2 National Center for Radiation Research and Technology, Atomic Energy Authority, Cairo, Egypt
Materials Sciences and Applications·Volume 04 (2013)·Pages 324–329·Published 21 May 2013·DOI10.4236/msa.2013.45042
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Abstract
Ultraviolet - visible UV - Vis diffuse reflectance measurements of irradiated lithium tetra - borate glass have b een acquired using . Evolution 600 Spectrophotometer equipped with praying Mantis Diffuse Reflectance Accessory DRA base upon the onset of the diffuse reflectance spectra of the powdered or bulk materials. Also the absorption edge and band gap energies of the prepared glass were determined. The optical energy gap is calculated and found to be (3.0 - 3.5) eV. Which is in close agreement to the one calculated for r = 1/2 , i.e . the transition mechanism , is accordingly direct allowed transition. The density increase s from 3 . 1 to 3 . 9 gm / cm 3 f or the undoped and doped glass.
KeywordsDiffuse Reflectance AccessoryOptical GapBorate-Lead-Titanium-Glasses Gamma Radiation
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