Browsing by ORCID "0000-0002-6783-7345"

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    The study of dosimetric properties of sulfanilic acid in low radiation dose range using the ESR technique
    (Taylor&Francis, 2024-01-26) Tepe Çam, Semra
    The development of new dosimeters with good dosimetric proper-ties is important for quality control in radiation applications. In thisstudy, the potential of sulfanilic acid (C6H7NO3S) powder form, as adosimeter in low-dose ionizing radiation (<30 Gy), was analyzed byan Electron Spin Resonance spectrometer (Bruker EMX-131 X-band).Gamma irradiations were performed at room temperature (290 K)using a60Co gamma cell supplying a dose rate of 32 Gy/h and Xphoton irradiations at 6 and 18 MV energies were performed usinga variant DHX model clinical linear accelerator (Linac) at a dose rateof 3 Gy/min. While unirradiated (control) sulfanilic acid exhibited noESR signal, the irradiated sample showed a single-line ESR spectrumspread over a magnetic field range of 100 G, as shown in Figure2.Variations of the peak heights with the sample mass irradiated at2 Gy gamma dose were studied in the range of 130–330 mg. The ESRsignal intensity observed at g-factor=2.0053 of this compound isdependent on sample mass, so∼250 mg was chosen at each step ofthe study. The paramagnetic center formed in the gamma-irradiatedsulfanilic acid was followed over 50 days. The dose-response curveswere given in the dose range from 0.05 to 10 Gy for the sampleexposed to gamma radiation and for the sample exposed in therange of 0.05 Gy–30 Gy at 6 and 18 MV X-ray energies. The fittingvalues of the function that best describes dose-response curves arecalculated. In the g value region, where the ESR signal was observedin the irradiated sample, the lowest dose value at which the sig-nal could be read was 50 mGy, significantly different from the noise.With all these investigations, sulfanilic acid can be used to esti-mate gamma radiation dose within boundary conditions in medicalapplications.