Radiation-induced radicals in the crystals of strontium sulfate (SS) as rod dosimeters were studied using an electron paramagnetic resonance (EPR) spectrometer. Dosimetric studies were performed in the dose range of 0.5 to 25 Gy for the dosimeters to investigate their potential applications in radiotherapy (⁶⁰Co γ-rays and high megavoltage X-ray with 6 and 15 MV). Additionally, the response of these dosimeters was compared to the response of alanine pellet dosimeters at the three-beam qualities. Irradiation of SS dosimeters produces five EPR signals, and their intensity increases linearly with increasing absorbed doses from 0.5 to 25 Gy. A peak of a splitting g-factor (g) = 2.01039 was selected for the present evaluations as it has a higher intensity. The change in response of SS rod dosimeters after irradiation does not exceed ±2% over six months, exhibiting good stability. The response of SS dosimeters increases with increasing the incident beam energy from ⁶⁰Co gamma rays to 16 MV X-ray beam. For alanine dosimeters, a non-significant change is observed under these beam qualities. The response of SS dosimeter at 6 and 15 MV relative to a⁶⁰Co beam quality increases by about 3.8% and 14.1%, respectively.

Moreover, the response of the SS dosimeters increases 2.24% with increasing the dose rate from 100 to 400 cGy/min, while for the alanine dosimeters, the increase in response is less than 0.49%. Environmental factors (relative humidity levels of 0–76% and temperature degrees of 15–30 °C) have a slight impact on the response of SS rods during irradiation. The overall uncertainty of dose monitoring was reported to be ±4.02% (2σ, 95% confidence levels).

使用电子顺磁共振 (EPR) 光谱仪研究了作为棒剂量计的硫酸锶 (SS) 晶体中的辐射诱导自由基。剂量计在 0.5 到 25 Gy 的剂量范围内进行了剂量学研究，以研究它们在放射治疗中的潜在应用（⁶⁰Co γ 射线和 6 和 15 MV 的高兆电压 X 射线）。此外，这些剂量计的响应与丙氨酸颗粒剂量计在三光束质量下的响应进行了比较。SS 剂量计的辐照会产生五个 EPR 信号，它们的强度随着吸收剂量从 0.5 Gy 增加到 25 Gy 呈线性增加。选择分裂 g 因子 (g) = 2.01039 的峰值用于当前评估，因为它具有更高的强度。SS棒剂量计在辐照后的响应变化在六个月内不超过±2%，表现出良好的稳定性。SS 剂量计的响应随着入射光束能量从⁶⁰增加而增加Co 伽马射线到 16 MV X 射线束。对于丙氨酸剂量计，在这些光束质量下观察到非显着变化。相对于⁶⁰ Co 光束质量，SS 剂量计在 6 和 15 MV 处的响应分别增加了约 3.8% 和 14.1%。

此外，随着剂量率从 100 增加到 400 cGy/min，SS 剂量计的响应增加了 2.24%，而丙氨酸剂量计的响应增加小于 0.49%。环境因素（0-76% 的相对湿度和 15-30 °C 的温度）对 SS 棒在辐照过程中的响应有轻微影响。据报道，剂量监测的总体不确定性为 ±4.02%（2σ，95% 置信水平）。