Characterizing thermoluminescence properties of calcium halophosphate fluorescent coating powder for radiation dosimetry.
The thermoluminescence (TL) and other properties of calcium halophosphate fluorescent coating powder were studied in detail with the sole aim of ascertaining its suitability for use as a dosimetric material. The shape of the glow curve (peaks at about 125 degrees C and 350 degrees C) as well as its fairly linear dose response even at very high doses are indicative of its suitability. Optical properties of the material were studied using Infrared spectroscopy (IR) and UV-Visible spectrophotometry. The IR spectrum shows a prominent peak at 3425.9 cm(-1) indicating the presence of OH and N-H bonds. The material absorbs sharply at wavelength between 196 nm and 220 nm. The material exhibits high transmittance at various peaks with corresponding wavelengths from 300 to 831 nm. This material can also find application in radiation therapy associated with very high accident dosimetry as well as in material testing.
Department of Physics, Adeyemi College of Education Ondo, Ondo State, Nigeria.
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Inyang
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Taleatu
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Oketayo
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Mokobia
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Adenodi
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Balogun
D002130:Calcium Phosphates / Q000737:chemistry*; D005453:Fluorescence; D006219:Halogens / Q000737:chemistry*; D006358:Hot Temperature; D049449:Luminescence; D011208:Powders; D011874:Radiometry; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet
D002130:Calcium Phosphates; D006219:Halogens; D011208:Powders; C020243:calcium phosphate