Post-annealing effects on EPR response of irradiated nano-structure hydroxyapatite

作者：Dowlatshah F; Ziaie F^*; Hajiloo N; Amraie R; Fathollahi H

来源：Radiation Effects and Defects in Solids-Incorporating Plasma Science and Plasma Technology, 2012, 167(12): 937-946.

DOI：10.1080/10420150.2012.696645

• EPR spectroscopy
• hydrolysis method
• hydroxyapatite
• gamma ray
• annealing

In this work, the nano-structure hydroxyapatite was synthesized via the hydrolysis method. The produced powders were thermally treatment at different temperatures from 400 to 1200 degrees C. The morphological and chemical analyses were carried out using the Fourier transmission infrared spectroscopy, transmission electron microscopy, and X-ray diffraction system. Then, the samples were irradiated at different absorbed doses from 1 to 80 kGy using Co-60 gamma-ray. Electron paramagnetic resonance (EPR) responses of the samples were measured at room temperature in air. Subsequently, the variations of EPR signal intensities were constructed as the peak-to-peak signal amplitude and results were compared with those of non-annealed samples. The results show that the EPR responses of non-annealed samples are higher rather than other samples and also are saturated at higher doses in comparison with the others.

• 出版日期2012