Dose determination by ESR in an accident,using cotton fabric |
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| Authors: | R Venkataramani S K Mehta M R Iyer V Natarajan M D Sastry |
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| Institution: | (1) Radiation Safety Systems Division, Bhabha Atomic Research Centre, Trombay, 400 085 Bombay, India;(2) Radiochemistry Division, Bhabha Atomic Research Centre, Trombay, 400 085 Bombay, India |
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| Abstract: | Accidental exposure dose assessment by electron spin resonance (ESR) technique from the free radicals generated in a cotton handkerchief has been attempted in this investigation. The cotton handkerchief, a common material carried by individuals, was taken as the medium for free radical estimation. About 55 mg of the irradiated piece of cloth was loaded into a quartz tube and the dose dependence of the ESR signal at g=2.0026 was measured at room temperature, using a Bruker ESP-300 ESR spectrometer in X-band (9.74 GHz). The intensity of this signal was found to be proportional to the dose in the range of 1–1000 Gy. The stability of the free radicals with time of storage was followed. Dependence of dose rate as well as the presence of water on the yield of free radicals were also investigated. |
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