RESUMO
Objective To evaluate the performance of energy discriminating dosimeter and compare the impact of the assessment results. Methods CTLD-J4000 energy discriminating dosimeter was irradiated with different energy photons, and the differences covered by the dosimeters were used. Density filtering materials have different filtering effects on photons, and the ratio curve of the readings to the photon energy was fitted to identify the photon energy. Results The coincidence between the non-filter/light filter of the CTLD-J4000 energy discrimination dosimeter and the manufacturer's reference value was better than that of the non-filter/re-filter. The latter had higher deviation values at 48 keV(12.8%)and 83 keV(15.5%), respectively. Using the average scale factor, the maximum energy response deviation was 23.5%. Conclusion Using a discriminating dosimeter can better identify the ray energy, thereby reducing the energy response error caused by using the average scale factor.