• NUCLEAR TECHNIQUES
  • Vol. 47, Issue 9, 090205 (2024)
Zhen HU1, Lu ZHANG1, Yifu ZHOU1, Qingming HE2..., Long GU1 and Shixu ZHANG1,*|Show fewer author(s)
Author Affiliations
  • 1School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China
  • 2School of Nuclear Science and Technology, Xi'an Jiaotong University, Xi'an 710049, China
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    DOI: 10.11889/j.0253-3219.2024.hjs.47.090205 Cite this Article
    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 Copy Citation Text show less
    Structural diagram and dimensions of BSA and Snyder head phantom
    Fig. 1. Structural diagram and dimensions of BSA and Snyder head phantom
    Comparison of neutron spectra at BSA exit obtained by MCNP and MCX (a) rssa module, (b) sdef module
    Fig. 2. Comparison of neutron spectra at BSA exit obtained by MCNP and MCX (a) rssa module, (b) sdef module
    Comparison of neutron spectra at BSA exit using different neutron source modules (a) MCNPX software, (b) MCX software
    Fig. 3. Comparison of neutron spectra at BSA exit using different neutron source modules (a) MCNPX software, (b) MCX software
    Distributions of neutron flux with depth in head phantom for different databases(a) Thermal neutron, (b) Epithermal neutron
    Fig. 4. Distributions of neutron flux with depth in head phantom for different databases(a) Thermal neutron, (b) Epithermal neutron
    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. 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
    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
    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
    组织 Organ tissue密度 Density / g·cm-3元素质量分数 Elemental mass fraction / %
    头皮 Scalp1.09H, 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 Skull1.61H, 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 Brain1.04H, 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 1. Density and element composition of head phantom
    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 2. Recommended values of neutron source beam parameters
    中子束参数 Neutron beam parametersMCNPX rssaMCX rssaMCNPX sdefMCX sdef
    φepi / cm-2·s-11.170 3×1091.152 6×1091.154 8×1091.154 3×109
    Df /φepi / Gy·cm21.812 3×10-131.871 6×10-131.942 0×10-131.954 5×10-13
    Dγ /φepi / Gy·cm21.685 6×10-131.666 6×10-131.752 6×10-131.646 1×10-13
    φth /φepi0.047 70.047 90.048 20.048 4
    J/φ0.710 90.714 90.714 40.715 8
    Table 3. Comparison 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<0.1-1.30.1
    Df/φepi / Gy·cm23.30.77.24.4
    Dγ/φepi / Gy·cm2-1.1-6.14.0-1.2
    φth/φepi0.40.41.01.0
    J/φ0.60.20.50.1
    Table 4. Relative errors of calculated values of neutron beam parameters
    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
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