Radiation Protection Dosimetry Vol. 111, No. 1 © Oxford University Press 2004; all rights reserved
Thermoluminescence dosimetry of a thermal neutron field and comparison with Monte Carlo calculations
1 Instituto Tecnológico e Nuclear, Estrada Nacional 10, P-2686-953 Sacavém, Portugal
2 Centro de Física Nuclear da Universidade de Lisboa, Av. Prof. Gama Pinto, no. 2, P-1649-003 Lisboa, Portugal
3 Institute of Isotope and Surface Chemistry, Budapest P.O. Box 77, H-1525, Hungary
* Corresponding author: anafer{at}itn.mces.pt
The characteristics of thermoluminescence dosemeters (TLDs) regarding the determination of photon and neutron absorbed doses were investigated in a thermal neutron beam. Harshaw TLD-100 (LiF:Mg,Ti) and TLD-700 (7LiF:Mg,Ti) were compared with similar materials from Solid Dosimetric Detector and Method Laboratory (People's Republic of China). Harshaw TLD-700H (7LiF:Mg,Cu,P) and aluminium oxide (Al2O3:Mg,Y) from Hungary were also considered for photon dose measurement. The neutron sensitivity of the investigated materials was measured and found to be consistent with values reported by other authors. A comparison was made between the TL dose measurements and results obtained via conventional methods. An agreement within 20% was obtained, which demonstrates the ability of TLD for measuring neutron and photon doses in a mixed field, using careful calibration procedures and determining the neutron sensitivity for the usage conditions.
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