TY - JOUR
T1 - Neutron dosimetry with a pair of TLDs for the Elekta Precise medical linac and the evaluation of optimum moderator thickness for the conversion of fast to thermal neutrons
AU - Behmadi, Marziyeh
AU - Mohammadi, Sara
AU - Ravari, Mohammad Ehsan
AU - Mohammadi, Aghil
AU - Loushab, Mahdy Ebrahimi
AU - Bahreyni Toossi, Mohammad Taghi
AU - Ghergherehchi, Mitra
N1 - Publisher Copyright:
© 2023 Korean Nuclear Society
PY - 2024/2
Y1 - 2024/2
N2 - Introduction: In this study, TLD 600 and TLD 700 pairs were used to measure the neutron dose of Elekta Precise medical linac. To this end, the optimum moderate thickness for the conversion of fast to thermal neutrons were evaluated. Materials and methods: 241Am-Be and 252Cf sources were simulated to calculate the optimum thicknesses of the moderator for the conversion of maximum fast neutrons (FN) into thermal neutrons (TN). Pair TLDs were used to measure F&TN doses for three different field sizes at four depths of the medical linac. Results: The maximum thickness of the moderator was optimized at 6 cm. The measurement results demonstrated that the TN dose increased with the expansion of field size and depth. The FN dose, which was converted TN, exhibits behaviors comparable to the TN due to its nature. Conclusion: This study presents the optimum thickness for the moderator to convert FN into TN and measure F&TN using TLDs.
AB - Introduction: In this study, TLD 600 and TLD 700 pairs were used to measure the neutron dose of Elekta Precise medical linac. To this end, the optimum moderate thickness for the conversion of fast to thermal neutrons were evaluated. Materials and methods: 241Am-Be and 252Cf sources were simulated to calculate the optimum thicknesses of the moderator for the conversion of maximum fast neutrons (FN) into thermal neutrons (TN). Pair TLDs were used to measure F&TN doses for three different field sizes at four depths of the medical linac. Results: The maximum thickness of the moderator was optimized at 6 cm. The measurement results demonstrated that the TN dose increased with the expansion of field size and depth. The FN dose, which was converted TN, exhibits behaviors comparable to the TN due to its nature. Conclusion: This study presents the optimum thickness for the moderator to convert FN into TN and measure F&TN using TLDs.
KW - Am-Be and Cf sources
KW - Monte Carlo simulation
KW - Neutron contamination
KW - Optimum moderate thickness
KW - Radiotherapy
KW - TLD
UR - https://www.scopus.com/pages/publications/85179037088
U2 - 10.1016/j.net.2023.11.014
DO - 10.1016/j.net.2023.11.014
M3 - Article
AN - SCOPUS:85179037088
SN - 1738-5733
VL - 56
SP - 753
EP - 761
JO - Nuclear Engineering and Technology
JF - Nuclear Engineering and Technology
IS - 2
ER -