Usability of tartaric acid in dose measurements: An ESR study

Unirradiated tartaric acid samples do not exhibit any ESR signal. However, the ESR spectra of irradiated samples contain many resonance signals. The dose-responce curves of the resonance signals, denoted as I₁, I ₂, I₃ and I₄ in the present study, were found to increase linearly with the applied radiation dose in the range of 0.04-25kGy. Adjusting the microvawe power and modulation amplitudes of 1.0mW and 1.0mT, respectively, was found to increase the sensitivity of tartaric acid. From the dose-response curves and room temperature decay data, it was concluded that the I₃ resonance signal of tartaric acid can be used for dose measurements at intermediate (0.04-0.4kGy) and high dose (0.5-25kGy) levels.