Simulation of Shielding Performance of Ta-10W Alloy and Lead in CT Lateral Scattered Radiation Fields
- 1China Southwest Architectural Design and Research Institute Corp. Ltd. General Contracting Engineering Co., Ltd., Chengdu 610000, China
Abstract
Shielding performances of Ta-10W alloy and Pb in CT lateral-scattered radiation fields were compared using NIST XCOM data and MCNP6 models of a tungsten-target source，a PMMA phantom，and flat shielding plates. The air-kerma ratio \begin{document}$B_k was used to characterize transmission. As the tube voltage increased from 80 to 140 kVp，the mean energy of the 90° scattered spectrum increased from 47.01 to 57.95 keV，and the air−kerma contribution from 67.4–88.0 keV increased from 2.40% to 19.14%. For the sameB_k $\end{document} as 2.5 mm Pb，the equivalent Ta-10W thicknesses were 2.01，1.50，1.37，and 1.33 mm at 80，100，120，and 140 kVp，respectively，corresponding to thickness reductions of 19.56%–46.98%. At 100–140 kVp，the areal density was reduced by 10.67%–21.08%. The mass attenuation coefficient of Ta-10W at 80 keV was about 3.15 times that of Pb. The advantage is attributed to enhanced attenuation above the Ta/W K edges and below the Pb K edge，providing a numerical reference for thin local shielding in CT rooms.
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BibTeX
@article{teng2026simulation,
title = {{Simulation of Shielding Performance of Ta-10W Alloy and Lead in CT Lateral Scattered Radiation Fields}},
author = {Na TENG},
journal = {Journal of Isotopes},
year = {2026},
month = oct,
doi = {10.7538/tws.2026.youxian.059},
url = {https://doi.org/10.7538/tws.2026.youxian.059},
note = {CC BY-NC-ND},
}
RIS
TY - JOUR
TI - Simulation of Shielding Performance of Ta-10W Alloy and Lead in CT Lateral Scattered Radiation Fields
AU - Na TENG
PY - 2026
DA - 2026/10/26
JO - Journal of Isotopes
DO - 10.7538/tws.2026.youxian.059
UR - https://doi.org/10.7538/tws.2026.youxian.059
AB - Shielding performances of Ta-10W alloy and Pb in CT lateral-scattered radiation fields were compared using NIST XCOM data and MCNP6 models of a tungsten-target source，a PMMA phantom，and flat shielding plates. The air-kerma ratio \begin{document}$B_k was used to characterize transmission. As the tube voltage increased from 80 to 140 kVp，the mean energy of the 90° scattered spectrum increased from 47.01 to 57.95 keV，and the air−kerma contribution from 67.4–88.0 keV increased from 2.40% to 19.14%. For the sameB_k $\end{document} as 2.5 mm Pb，the equivalent Ta-10W thicknesses were 2.01，1.50，1.37，and 1.33 mm at 80，100，120，and 140 kVp，respectively，corresponding to thickness reductions of 19.56%–46.98%. At 100–140 kVp，the areal density was reduced by 10.67%–21.08%. The mass attenuation coefficient of Ta-10W at 80 keV was about 3.15 times that of Pb. The advantage is attributed to enhanced attenuation above the Ta/W K edges and below the Pb K edge，providing a numerical reference for thin local shielding in CT rooms.
SN - 1000-7512
ER -