TY - JOUR
T1 - Thermoluminescent characteristics of LiF
T2 - MG, Cu, P and CaSO4: Dy for low dose measurement
AU - Del Sol Fernández, S.
AU - García-Salcedo, R.
AU - Mendoza, J. Guzmán
AU - Sánchez-Guzmán, D.
AU - Rodríguez, G. Ramírez
AU - Gaona, E.
AU - Montalvo, T. Rivera
N1 - Publisher Copyright:
© 2016 Elsevier Ltd.
PY - 2016/5/1
Y1 - 2016/5/1
N2 - Thermoluminescence (TL) characteristics for LiF:Mg, Cu, P, and CaSO4:Dy under the homogeneous field of X-ray beams of diagnostic irradiation and its verification using thermoluminescence dosimetry are presented. The irradiation were performed utilizing a conventional X-ray equipment installed at the Hospital Juárez Norte of México. Different thermoluminescence characteristics of two material were studied, such as batch homogeneity, glow curve, linearity, detection threshold, reproducibility, relative sensitivity and fading. Materials were calibrated in terms of absorbed dose to the standard calibration distance and they were positioned in a generic phantom. The dose analysis, verification and comparison with the measurements obtained by the TLD-100 were performed. Results indicate that the dosimetric peak appears at 202 °C and 277.5 °C for LiF:Mg, Cu, P and CaSO4:Dy, respectively. TL response as a function of X-ray dose showed a linearity behavior in the very low dose range for all materials. However, the TLD-100 is not accurate for measurements below 4 mGy. CaSO4:Dy is 80% more sensitive than TLD-100 and it show the lowest detection threshold, whereas LiF:Mg, Cu, P is 60% more sensitive than TLD-100. All materials showed very good repeatability. Fading for a period of one month at room temperature showed low fading LiF:Mg, Cu, P, medium and high for TLD-100 and CaSO4:Dy. The results suggest that CaSO4:Dy and LiF:Mg, Cu, P are suitable for measurements at low doses used in radiodiagnostic.
AB - Thermoluminescence (TL) characteristics for LiF:Mg, Cu, P, and CaSO4:Dy under the homogeneous field of X-ray beams of diagnostic irradiation and its verification using thermoluminescence dosimetry are presented. The irradiation were performed utilizing a conventional X-ray equipment installed at the Hospital Juárez Norte of México. Different thermoluminescence characteristics of two material were studied, such as batch homogeneity, glow curve, linearity, detection threshold, reproducibility, relative sensitivity and fading. Materials were calibrated in terms of absorbed dose to the standard calibration distance and they were positioned in a generic phantom. The dose analysis, verification and comparison with the measurements obtained by the TLD-100 were performed. Results indicate that the dosimetric peak appears at 202 °C and 277.5 °C for LiF:Mg, Cu, P and CaSO4:Dy, respectively. TL response as a function of X-ray dose showed a linearity behavior in the very low dose range for all materials. However, the TLD-100 is not accurate for measurements below 4 mGy. CaSO4:Dy is 80% more sensitive than TLD-100 and it show the lowest detection threshold, whereas LiF:Mg, Cu, P is 60% more sensitive than TLD-100. All materials showed very good repeatability. Fading for a period of one month at room temperature showed low fading LiF:Mg, Cu, P, medium and high for TLD-100 and CaSO4:Dy. The results suggest that CaSO4:Dy and LiF:Mg, Cu, P are suitable for measurements at low doses used in radiodiagnostic.
KW - Dosimetry
KW - Low dose X-ray
KW - Radiodiagnostic
KW - Thermoluminescent materials
UR - http://www.scopus.com/inward/record.url?scp=84958982495&partnerID=8YFLogxK
U2 - 10.1016/j.apradiso.2016.02.011
DO - 10.1016/j.apradiso.2016.02.011
M3 - Artículo
C2 - 26922395
SN - 0969-8043
VL - 111
SP - 50
EP - 55
JO - Applied Radiation and Isotopes
JF - Applied Radiation and Isotopes
ER -