The ESR dosimetric features of strontium sulfate and temperature effects on radiation-induced signals

• The radiation-induced ESR signal B has great dosimeter potential below 100 Gy.
• Two radical species are responsible from ESR signal B.
• These radicals have activation energies of 42.8±3.6 and 88.2±5.8 kJ/mol.

In the present work, the ESR dosimetric potential of strontium sulfate has been investigated in the radiation dose range of 1–100 Gy. It does not exhibit any ESR signal before irradiation. However, irradiation produced three intensive resonance signals (A, B and C) which increase linearly in the studied dose range. Variable temperature study showed that all ESR signals were found to decrease significantly at temperatures higher than 340 K. Kinetic studies performed at high temperatures showed that at least two distinct radical species with the activation energy values of 42.8±3.6 and 88.2±5.8 kJ/mol, respectively, contributed to the ESR signal B.