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Ziaie, F.
- Comparison of the Performance of Synthesized Nano-structure Hydroxyapatite with Bovine Bones and Alanine Samples for EPR Dosimetry
Abstract Views :377 |
PDF Views:130
Authors
Affiliations
1 Agricultural, Medical and Industrial Research School, Nuclear Science & Tech. Research Institute, Karaj
2 Azerbaijan National Academy of Science, Institute of Physics, Baku, Azerbaijan
3 Biomaterials Lab., Ceramic Dept. of Materials and Energy Research Center (MERC), Tehran, IR
1 Agricultural, Medical and Industrial Research School, Nuclear Science & Tech. Research Institute, Karaj
2 Azerbaijan National Academy of Science, Institute of Physics, Baku, Azerbaijan
3 Biomaterials Lab., Ceramic Dept. of Materials and Energy Research Center (MERC), Tehran, IR
Source
Indian Journal of Science and Technology, Vol 4, No 6 (2011), Pagination: 608-612Abstract
Radiation dosimetry was done by measuring free radicals induced in synthetic nano-structure hydroxyapatite (HAP) using EPR method. The HAP samples were synthesized via fluid body simulated method and were irradiated at different dose intervals and subsequently subjected to the EPR measurement. The effects of some EPR parameters were investigated as well. Variations of EPR signal intensities were constructed as peak-to-peak signal amplitude and were compared with alanine and bovine bone samples for two different dose ranges of Gy and kGy from dosimetric point of view. The results were shown that the HAP samples were more practical for doses in Gy range. At kGy range doses the bone sample and alanine dosimeter shows a better EPR responses.Keywords
Radiation Dosimetry, Nanostructure, Hydroxyapatite, EPRFull Text
References
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- Ziaie F, Hajiloo N, Fathollahi H and Mehtieva SI (2009) Bone powder as EPR dosimetry system for electron and gamma radiation. Nukleonika. 54 (4), 267-270.
- Investigation upon Recycling of High Energy Electron Beam Irradiated Alanine Dosimeter
Abstract Views :340 |
PDF Views:91
Authors
Affiliations
1 Department of Physics, Taft Branch, Islamic Azad University, Taft, Iran
2 Agricultural, Medical and Industrial Research School, Nuclear Science & Technology Research Institute, Karaj, Iran
1 Department of Physics, Taft Branch, Islamic Azad University, Taft, Iran
2 Agricultural, Medical and Industrial Research School, Nuclear Science & Technology Research Institute, Karaj, Iran
Source
Indian Journal of Science and Technology, Vol 4, No 12 (2011), Pagination: 1657-1660Abstract
This paper presents the recycling possibility of irradiated alanine dosimeter via annealing methods. The alanine samples were irradiated under 10 MeV electron beam with the doses of 10, 30, and 60 kGy. The samples were stored in an oven with the different temperature and time. The fading effects of the EPR signal of the alanine samples were investigated, and the optimum time and temperature were found. Furthermore, the calibration curves have been drawn for the annealed samples. The stability of annealed alanine has also been examined. The results show that the optimum annealing time and temperature are 30 min and 200 °C, respectively. On the other hand, it was obvious that the obtained results were independent of the radiation dose.Keywords
EPR Dosimetry, Alanine, Recycling, AnnealingFull Text
References
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- Dolo JM and Moignau F (2005) Use of the entire spectrum of irradiated alanine for dosimetry. Appl. Radiat. Isot. 62, 281-285.
- Maltar-Strmecki N and Rakvin B (2005)Thermal stability of radiation-induced free radicals in gammairradiated L-alanine single crystals. Appl. Radiat. Isot.63, 375-380.
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- Synthesis and Characterization of Sodium-carbon Apatite Nano-crystals by Chemical Sedimentation Method
Abstract Views :430 |
PDF Views:119
Authors
Affiliations
1 Department of physics, Karaj Branch, Islamic Azad University, Karaj, IR
2 Agricultural, Medical and Industrial Research School, Nuclear Science & Technology Research Institute, P. O. Box 31485-498, Karaj,, IR
3 Agricultural, Medical and Industrial Research School, Nuclear Science & Technology Research Institute, P. O. Box 31485-498, Karaj, IR
4 Putra University Malaysian, MY
1 Department of physics, Karaj Branch, Islamic Azad University, Karaj, IR
2 Agricultural, Medical and Industrial Research School, Nuclear Science & Technology Research Institute, P. O. Box 31485-498, Karaj,, IR
3 Agricultural, Medical and Industrial Research School, Nuclear Science & Technology Research Institute, P. O. Box 31485-498, Karaj, IR
4 Putra University Malaysian, MY
Source
Indian Journal of Science and Technology, Vol 5, No S3 (2012), Pagination: 2464-2467Abstract
In this paper, attempts have been made to prepare the nano-crystalline hydroxyapatite similar to the natural one. First, the pure hydroxyapatite solution was prepared via chemical sedimentation method. The pure hydroxyapatite was made in an aqueous media by adding calcium chloride (CaCl2) to phosphoric acid (H3PO4) with a molar ratio of Ca/P=1.66 in the presence of 2M acetic acid (CH3COOH). Then by inserting carbonate agent (CO3 -2) into the initial hydroxyapatite structure the carbon apatite was formed. This was done by adding different amounts of sodium carbonate (Na2CO3), and considering different molar rations CO3 -2/PO4 -3. Sodium-carbonated apatite was precipitated in an alkaline solution. FTIR and XRD systems were utilized to evaluate the present of the agent groups and the desired phases. The morphology and microstructure of the samples were studied using a TEM apparatus. The results confirm the formation of sodium-carbon apatite nano-crystal. These were also pointed out that the increasing the carbon in hydroxyapatite structure causes the reduction of the crystallinity degree, increases the solubility rate and changes the morphology of nano-crystalsKeywords
Hydroxyapatite (HA), Sodium-carbonated Apatite, Crystal StructureFull Text
References
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- Ziaie F, Stachowicz W and Al-Osaimi S (1999) Using bone powder for dosimetric system EPR response under the action of gamma irradiation. J. Nukleonika, 44, 603-608.