Affiliation:
1. Radiation Application Research School , Nuclear Science & Technology Research Institute, PO Box 11365-3486, Tehran , Iran. E-mail:
Abstract
Abstract
Synthetic nano-structure hydroxyapatite samples were doped by carbon in furnace via exposing to CO2 circulating gas in different time of 30, 120, and 360 min under 100°C and 400°C of temperatures. FTIR, TEM and XRD analyses results confirmed the doping of carbonate group to the hydroxyapatite structure. The samples were irradiated in absorbed doses of 2, 5, 10, 20, 50, and 80 kGy using a 60Co γ-ray source and subjected to EPR measurement, subsequently. The EPR signal intensities were constructed as a function of radiation dose, were compared with the results of raw sample and were studied from dosimetric point of view. The obtained results show a considerable increment in EPR signal intensities of the samples which were treated at 400°C. At the doses less than 20 kGy the carbon doped samples show a better EPR respond. This is much better for doses below 5 kGy in comparison to the raw samples and the response is quite linear.
Subject
Safety, Risk, Reliability and Quality,General Materials Science,Nuclear Energy and Engineering,Nuclear and High Energy Physics,Radiation
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