Thermoluminescent dosimeters for low dose X-ray measurements

• Low dose X-ray doses for personal dosimetry were measured.
• Radiation dose (µGy ) for environmental dosimetry were determined.
• Scattering radiation dose were measured by TLDs.
• Linearity of pair TLD system was successful in the range of microgray.
• Pair TLDs composed by CaSO4:Dy and by LiF:Mg,Cu,P. is suggested for clinical dosimetry.

The response of TLD-100, CaSO4:Dy and LiF:Mg,Cu,P for a range of X-ray low dose was measured. For calibration, the TLDs were arranged at the center of the X-ray field. The dose output of the X-ray machine was determined using an ACCU-Gold. All dosimeters were exposed at the available air kerma values of 14.69 mGy within a field 10×10 cm2 at 80 cm of SSD. Results of LiF:Mg,Cu,P X-ray irradiated showed 4.8 times higher sensitivity than TLD-100. Meanwhile, TL response of CaSO4:Dy exposed at the same dose was 5.6 time higher than TLD-100. Experimental results show for low dose X-ray measurements a better linearity for LiF:Mg,Cu,P compared with that of TLD-100. CaSO4:Dy showed a linearity from 0.1 to 60 mGy