Thermoluminescence (TL) properties of Al2O3: C,Mg exposed to cobalt-60 gamma radiation doses |
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| Institution: | 1. National Center for Radiation Research and Technology (NCRRT), Atomic Energy Authority, Cairo, Egypt;2. Chemistry Department, Faculty of Education, Ain Shams University, Cairo, Egypt;3. Chemistry Department, Faculty of Science, Cairo University, Cairo, Egypt;1. Department of Radiology, Fujita Health University Hospital, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, Japan;2. Brain & Mind Research Center, Nagoya University, 1-1-20 Daiko-Minami, Higashi-ku, Nagoya, Aichi, Japan;3. Nagoya University, 1-1-20 Daiko-Minami, Higashi-ku, Nagoya, Aichi, Japan;4. Faculty of Radiological Technology, Fujita Health University, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, Japan;5. Central Block of Radiology, Nagoya University Hospital, 65 Tsurumai-cho, Shouwa-ku, Nagoya, Aichi, Japan;1. Radiological Physics and Advisory Division, Bhabha Atomic Research Centre (BARC), Mumbai, India;2. Technical Physics Division, Bhabha Atomic Research Centre (BARC), Mumbai, India;1. College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, China;2. College of Materials Science and Engineering, China Jiliang University, Hangzhou 310018, China;1. Department of Physics, Soongsil University, Seoul, 06978, South Korea;2. Department of Physics and Research Institute of Physics and Chemistry, Chonbuk National University, Jeonju, 54896, South Korea;1. Physics Department, Oklahoma State University, 145 Physical Sciences II, Stillwater, OK 74078, USA;2. Landauer, Inc., Stillwater Crystal Growth Division, 723 1/2 Eastgate, Stillwater, OK 74074, USA |
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| Abstract: | TL characteristics of powder form of Al2O3 doped with 0.1 mol% carbon and co-doped with different magnesium concentrations of 0.1 mol% and 0.2 mol% exposed to Cobalt-60 gamma ray at doses ranging from 5 Gy to 70 Gy were investigated. The recorded glow curves consist a dominant peak at 180 °C for a heating rate of 1 °C s−1. The TL sample with 0.2 mol% Mg concentration have higher response compared to the sample with 0.1 mol% Mg concentration for a delivered dose of 5 Gy. The TL response has linear relationship with delivered dose for both samples. The TL sensitivity was found as 277.9 nC mg−1 Gy−1 for the sample with Mg concentration 0.2 mol% and 128.2 nC mg−1 Gy−1 for 0.1 mol% Mg. However, the sample with 0.1 mol% Mg concentration has better fading properties compared to the sample with 0.2 mol% Mg concentration. Both samples show good reproducibility with value less than 13%. The experimental value of effective atomic number, Zeff is 9.21 and 9.44 for the sample with Mg concentration 0.1% mol and 0.2% mol, respectively, which are near to Zeff of bone with a value of about 11.6. |
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| Keywords: | Thermoluminescence Dosimetry Cobalt-60 gamma ray Aluminium oxide doped carbon Co-doped magnesium |
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