VARIATION IN RESPONSE AND PHYSICAL PROPERTIES OF SOME COMMERCIAL THERMOLUMINESCENT DOSIMETERS LiF (TLD-100), CaF2: Dy (TLD-200) and CaSO4: Dy (TLD-900) AFTER GAMMA IRRADIATION
El-Sayed, M., Kamal, S. (2006). VARIATION IN RESPONSE AND PHYSICAL PROPERTIES OF SOME COMMERCIAL THERMOLUMINESCENT DOSIMETERS LiF (TLD-100), CaF2: Dy (TLD-200) and CaSO4: Dy (TLD-900) AFTER GAMMA IRRADIATION. EKB Journal Management System, 3(International Conference on Engineering Mathematics and Physics (ICMEP-3)), 1-11. doi: 10.21608/icmep.2006.29922
Mohamed A. El-Sayed; Salah M. Kamal. "VARIATION IN RESPONSE AND PHYSICAL PROPERTIES OF SOME COMMERCIAL THERMOLUMINESCENT DOSIMETERS LiF (TLD-100), CaF2: Dy (TLD-200) and CaSO4: Dy (TLD-900) AFTER GAMMA IRRADIATION". EKB Journal Management System, 3, International Conference on Engineering Mathematics and Physics (ICMEP-3), 2006, 1-11. doi: 10.21608/icmep.2006.29922
El-Sayed, M., Kamal, S. (2006). 'VARIATION IN RESPONSE AND PHYSICAL PROPERTIES OF SOME COMMERCIAL THERMOLUMINESCENT DOSIMETERS LiF (TLD-100), CaF2: Dy (TLD-200) and CaSO4: Dy (TLD-900) AFTER GAMMA IRRADIATION', EKB Journal Management System, 3(International Conference on Engineering Mathematics and Physics (ICMEP-3)), pp. 1-11. doi: 10.21608/icmep.2006.29922
El-Sayed, M., Kamal, S. VARIATION IN RESPONSE AND PHYSICAL PROPERTIES OF SOME COMMERCIAL THERMOLUMINESCENT DOSIMETERS LiF (TLD-100), CaF2: Dy (TLD-200) and CaSO4: Dy (TLD-900) AFTER GAMMA IRRADIATION. EKB Journal Management System, 2006; 3(International Conference on Engineering Mathematics and Physics (ICMEP-3)): 1-11. doi: 10.21608/icmep.2006.29922

VARIATION IN RESPONSE AND PHYSICAL PROPERTIES OF SOME COMMERCIAL THERMOLUMINESCENT DOSIMETERS LiF (TLD-100), CaF2: Dy (TLD-200) and CaSO4: Dy (TLD-900) AFTER GAMMA IRRADIATION

The International Conference on Mathematics and Engineering Physics
Article 15, Volume 3, International Conference on Engineering Mathematics and Physics (ICMEP-3), May 2006, Page 1-11  XML PDF (401.71 K)
Document Type: Original Article
DOI: 10.21608/icmep.2006.29922
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Authors
Mohamed A. El-Sayed1; Salah M. Kamal2
1Egyptian Armed Forces, Cairo, Egypt.
2Radiation Protection Dept., Nuclear Research Center, AEA.
Abstract
ABSTRACT
For routine dosimetry, several TLD materials have been used, each having its
own definite properties. In this paper, the physical TL properties of the three used
commercial thermoluminescent (TL) materials, [ LiF (TLD-100), CaF2:Dy (TLD-200)
and CaSO4:Dy (TLD-900) ], have been studied in order to identify the efficiency of the
optimum material for gamma radiation measurements. The main investigated
dosimetric properties are glow curve structure, sensitivity, dose response, fading,
memory effects and sensitization.
The experimental results show that the glow curve structure of the , TLD-100
includes 4 glow peaks at 135, 182, 210 & 230 oC , TLD-200 includes 2 peaks at 179
& 240 oC and TLD-900 includes 3 peaks at 123, 220 & 338 oC. The sensitivity of
TLD-200 was found to be 9-20 times greater than the standard one (TLD-100), but
for TLD-900, it was found 8-13 times greater than the standard one. It was found that
the TL response of the three phosphors fit to a straight line in the logarithmic scale
from, 50 μGy – 5 Gy , 50 μGy – 10 Gy and 5 μGy – 10 Gy, respectively. The fading
values were found to be ≈ 7.5 & 20.1 %, 14 & 32% and 10.4 & 12 % for the three
phosphors, respectively, after the storage for 3 months at 25 & 50 oC, respectively.
From the results which previously mentioned, calcium Sulphate doped by dysprosium
has been selected for local preparation.
Keywords
Thermoluminescent Dosimeters; TL-Sensitivity; memory effects; LiF (TLD-100); CaF2:Dy (TLD-200); CaSO4:Dy (TLD-900)
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