Investigation of the dosimetric properties of potassium hydrogen tartrate using EPR

Use of electron paramagnetic resonance (EPR) in radiation dosimetry means more accurate and reliable evalu-ation of radiation doses. The search for new dosimeter material is continuing to overcome some drawbacks of available ones. In current work potassium hydrogen tartrate is presented as a new EPR dosimeter material where its radiation dose dependency, effects of the change in microwave power and modulation amplitude on the peak-to-peak intensity were studied. Response of potassium hydrogen tartrate to gamma radiation was studied in two ranges: the first starts at 1.4 Gy and ends at 84.2 Gy, and the second from 42.1 Gy to 2415.6 Gy. Calibration curves were obtained with associated combined uncertainties range from 0.5% and up to 27.4% for the first peak and from 0.5% up to 10.2%, for the second peak. Calibration curves were plotted and compared to alanine. Time dependence of the EPR spectra of the radiation-induced radicals was monitored over short term (10 h) and long-term (28 days) following irradiation.

Automated summary

The use of electron paramagnetic resonance (EPR) in radiation dosimetry allows for more accurate and reliable assessment of radiation doses. The search for new dosimeter materials continues to overcome limitations of current ones. This study presents potassium hydrogen tartrate as a new EPR dosimeter material and investigates its radiation dose dependency, the impact of changes in microwave power and modulation amplitude on peak-to-peak intensity. The response of potassium hydrogen tartrate to gamma radiation is examined in two ranges, with calibration curves plotted and compared to alanine. The time dependence of radiation-induced radicals' EPR spectra is monitored over short term (10 hours) and long-term (28 days) post-irradiation.