Properties of the ammonium tartrate/EPR dosimeter |
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| Institution: | 1. State Key Laboratory Base of Eco-chemical Engineering, Laboratory of Inorganic Synthesis and Applied Chemistry, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, PR China;2. State Key Laboratory Base of Eco-chemical Engineering, College of Sino-German Science and Technology, Qingdao University of Science and Technology, Qingdao 266042, PR China;3. School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, China |
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| Abstract: | The EPR response of γ-irradiated ammonium tartrate on the absorbed dose of γ-rays up to 22 kGy as well as the changes in the shape of the EPR spectrum upon applied modulation amplitude and microwave power are reported. Also the possibility to use ammonium tartrate together with Mn2+ magnetically diluted in MgO as an internal reference material is evaluated. The influence of the microwave power and the modulation amplitude on their dose response is investigated. The results show that the radiation-induced EPR spectrum of ammonium tartrate, obtained at a low microwave power is complex consisting several patterns and is more easily saturated than the Mn2+ EPR spectrum. In this case the following settings of the EPR parameters are recommended: Hmod⩽0.05 mT and 10⩽PMW⩽13 mW. Using these parameters the dosimeters can be considered for use in intercomparisons. |
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