NUCLEAR TECHNIQUES, Volume. 47, Issue 9, 090205(2024)
NECP-MCX software simulation of AB-BNCT neutron transport process
Figures & Tables(10)
Fig. 1. Structural diagram and dimensions of BSA and Snyder head phantom
Fig. 2. Comparison of neutron spectra at BSA exit obtained by MCNP and MCX (a) rssa module, (b) sdef module
Fig. 3. Comparison of neutron spectra at BSA exit using different neutron source modules (a) MCNPX software, (b) MCX software
Fig. 4. Distributions of neutron flux with depth in head phantom for different databases(a) Thermal neutron, (b) Epithermal neutron
Fig. 5. Dose rate distributions of each component with depth in head phantom for different databases(a) Boron dose rate, (b) Nitrogen dose rate, (c) γ dose rate, (d) Total dose rates
Fig. 6. Distributions of total doses with depth in normal tissue and tumor for different databases in head phantom(a) ENDF/B-VII.0 database, (b) ENDF/B-VIII.0 database, (c) JEFF-3.3 database, (d) JENDL-5 database
Table 1. Density and element composition of head phantom
View tableView in ArticleTable 1. Density and element composition of head phantom
组织 Organ tissue 密度 Density / g·cm-3 元素质量分数 Elemental mass fraction / % 头皮 Scalp 1.09 H, 10; C, 20.4; N, 4.2; O, 64.5; Na, 0.2; P, 0.1; S, 0.2; Cl, 0.3; K, 0.1 颅骨 Skull 1.61 H, 5; C, 21.2; N,4; O, 43.5; Na, 0.1; Mg, 0.2; P, 8.1; S, 0.3; Ca, 17.6 脑 Brain 1.04 H, 10.7; C, 14.5; N, 2.2; O, 71.2; Na, 0.2; P, 0.4; S, 0.2; Cl, 0.3; K, 0.3
Table 2. Recommended values of neutron source beam parameters
View tableView in ArticleTable 2. Recommended values of neutron source beam parameters
中子束参数 Neutron beam parameters 建议值 Recommended values 超热中子注量率 Epithermal neutron flux rate φepi >1.0×109 cm-2·s-1 快中子成分 Fast neutron component Df/φepi <2.0×10-13 Gy·cm2 γ成分 Gamma component Dγ/φepi <2.0×10-13 Gy·cm2 热中子比例 Thermal neutron ratio φth/φepi <0.05 流量通量比 Flux-to-flux ratio J/φ >0.7
Table 3. Comparison of calculated values of neutron beam parameters
View tableView in ArticleTable 3. Comparison of calculated values of neutron beam parameters
中子束参数 Neutron beam parameters MCNPX rssa MCX rssa MCNPX sdef MCX sdef φepi / cm-2·s-1 1.170 3×109 1.152 6×109 1.154 8×109 1.154 3×109 Df /φepi / Gy·cm2 1.812 3×10-13 1.871 6×10-13 1.942 0×10-13 1.954 5×10-13 Dγ /φepi / Gy·cm2 1.685 6×10-13 1.666 6×10-13 1.752 6×10-13 1.646 1×10-13 φth /φepi 0.047 7 0.047 9 0.048 2 0.048 4 J/φ 0.710 9 0.714 9 0.714 4 0.715 8
Table 4. Relative errors of calculated values of neutron beam parameters
View tableView in ArticleTable 4. Relative errors of calculated values of neutron beam parameters
中子束参数
Neutron beam parameters
相对误差a Relative error a / % 相对误差b Relative error b / % 相对误差c Relative error c / % 相对误差d Relative error d / % φepi / cm-2·s-1 -1.5 <0.1 -1.3 0.1 Df/φepi / Gy·cm2 3.3 0.7 7.2 4.4 Dγ/φepi / Gy·cm2 -1.1 -6.1 4.0 -1.2 φth/φepi 0.4 0.4 1.0 1.0 J/φ 0.6 0.2 0.5 0.1
Tools
Get Citation
Copy Citation Text
Zhen HU, Lu ZHANG, Yifu ZHOU, Qingming HE, Long GU, Shixu ZHANG. NECP-MCX software simulation of AB-BNCT neutron transport process[J]. NUCLEAR TECHNIQUES, 2024, 47(9): 090205
Paper Information
Category: ACCELERATOR, RAY TECHNOLOGY AND APPLICATIONS
Received: Nov. 15, 2023
Accepted: --
Published Online: Nov. 13, 2024
The Author Email:
© Copyright 2018-2021 | Chinese Laser Press.
All Rights Reserved 沪ICP备15018463号-20