NUCLEAR TECHNIQUES, Volume. 47, Issue 12, 120201(2024)
Scheme design for neutron beam shaping assembly based on D-Be compact fast neutron source
Figures & Tables(15)
Fig. 1. Neutron energy spectrum before and after passing through the support-body and cooling-body (color online)
Fig. 3. Relationship between the variation of Φepi/Φfast with thickness under different combinations of slowing layers (color online)
Fig. 4. Relationship between the variation of Φepi with thickness under different combinations of slowing layers (color online)
Fig. 5. Relationship between the variation of Φfast/Φtotal with thickness under different combinations of slowing layers (color online)
Fig. 6. Energy spectrum of neutron beam after passing through a combination of two slowing layers (color online)
Fig. 7. Relationship between the variation of Φepi/Φfast with thickness under lead and bismuth (color online)
Fig. 8. Relationship between the variation of Φepi with thickness under lead and bismuth (color online)
Fig. 9. Relationship between the variation of Φepi/Φfast with thickness under different slowing layers (color online)
Fig. 10. Relationship between the variation of Φepi with thickness under different slowing layers (color online)
Fig. 11. Relationship between the variation of Φepi/Φth with thickness under different thermal neutron absorption layers (color online)
Table 1. Threshold energy associated to each of the accessible states of 10B
View tableView in ArticleTable 1. Threshold energy associated to each of the accessible states of 10B
能级
Energy
level
能级能量
Energy level energy / keV
阈值能量
Threshold energy / keV
基态Base — — 1 718.380 — 2 1 740.05 — 3 2 154.27 — 4 3 587.13 — 5 4 774.0 504.9 6 5 110.3 916.4 7 5 163.9 982.0 8 5 180.0 1 004.2
Table 2. Targeted values of therapeutic neutron beam recommended by IAEA
View tableView in ArticleTable 2. Targeted values of therapeutic neutron beam recommended by IAEA
BNCT端口参数
BNCT port parameters
建议值
Recommended values
Φepi / n·cm-2·s-1 ~109 / Φepi / Gy·cm2<2×10-13 /Φepi / Gy·cm2 <2×10-13 Φepi/Φfast >20 Φepi/Φth >20 J/Φ ~0.7 快中子能区 E / eV
Fast energy group
E>10 000 超热中子能区 E / eV
Epithermal energy group
0.5<E<10 000 热中子能区 E / eV
Thermal energy group
E<0.5
Table 3. Comparison between the values of neutron beam parameters at the final BSA outlet and other design schemes
View tableView in ArticleTable 3. Comparison between the values of neutron beam parameters at the final BSA outlet and other design schemes
BNCT端口参数
BNCT port parameters
Φepi
/ 109 n·cm-2·s-1
Φepi/Φfast Φepi/Φth /Φepi / 10-13 Gy·cm2
/Φepi / 10-13 Gy·cm2
J/Φ 建议值
Recommended value
~1 >20 >20 <2 <2 ~0.7 本文 This work 0.13 21.35 31.52 1.35 2.71×10-3 0.60 Cerullo et al[ 20 ]0.66 23.2 133.0 3.19 1.10 0.58 Montagnini et al[ 21 ]1.23 35.0 103.1 1.70 1.70 0.61 Fantidis et al[ 22 ]1.096 — 178.6 1.40 1.40 — ZHU Yinan et al[ 18 ]1.91 21.1 114.0 0.99 1.79 0.96
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Jia WANG, Zixiong ZHANG, Kaixuan LI, Yangxuan PAN, Qianglin WEI, Yibao LIU. Scheme design for neutron beam shaping assembly based on D-Be compact fast neutron source[J]. NUCLEAR TECHNIQUES, 2024, 47(12): 120201
Paper Information
Category: ACCELERATOR, RAY TECHNOLOGY AND APPLICATIONS
Received: Jun. 6, 2024
Accepted: --
Published Online: Jan. 15, 2025
The Author Email: LIU Yibao (LIUYibao)
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