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Thermoluminescence (TL) characteristics for LiF:Mg,Cu,P, and CaSO$_4$:Dyunder the homogeneous field of X-ray beams of diagnostic irradiation and itsverification using thermoluminescence dosimetry is presented. The irradiationwere performed utilizing a conventional X-ray equipment installed at theHospital Ju\'arez Norte of M\'exico. Different thermoluminescencecharacteristics of two material were studied, such as batch homogeneity, glowcurve, linearity, detection threshold, reproducibility, relative sensitivityand fading. Materials were calibrated in terms of absorbed dose to the standardcalibration distance and they were positioned in a generic phantom. The doseanalysis, verification and comparison with the measurements obtained by theTLD-100 were performed. Results indicate that the dosimetric peak appears at202$^o$C and 277.5$^o$C for LiF:Mg,Cu,P and CaSO$_4$:Dy, respectively. TLresponse as a function of X-ray dose showed a linearity behavior in the verylow dose range for all materials. However, the TLD-100 is not accurate formeasurements below $4mGy$. CaSO$_4$:Dy is 80\% more sensitive than TLD-100 andit show the lowest detection threshold, whereas LiF:Mg,Cu,P is 60\% moresensitive than TLD-100. All material showed very good repeatability. Fading fora period of one month at room temperature showed low fading LiF:Mg,Cu,P, mediumand high for TLD-100 and CaSO$_4$:Dy. The results suggest that CaSO$_4$:Dy andLiF:Mg,Cu,P are suitable for measurements at low doses used in radiodiagnostic.

Thermoluminescent characteristics of LiF:Mg,Cu,P and CaSO$_4$:Dy for low dose measurement