NUCLEAR TECHNIQUES, Volume. 46, Issue 9, 090501(2023)
Determination of cross-sections of natPb(p,x)207Bi and natPb(p,x)194Hg by GeTHU
Figures & Tables(20)
Fig. 1. Full gamma-spectra of natPb400 sample at a height of 0 mm and 40 mm measured by GeTHU for 7 d and 14 d vs. background spectrum of GeTHU (color online)
Fig. 2. Full gamma-spectra of natPb100, natPb70 and natPb40 samples measured by GeTHU vs. background spectrum of GeTHU (color online)
Fig. 3. Full gamma-spectrum of natPb400 sample with identified nuclides marked
Fig. 6. Calculated cross-sections of natPb(p,x)207Bi reaction in this research (red) vs. the results of other authors (blue), the evaluated cross sections from TENDL-2019 (magenta) and TENDL-2021 (green), and simulated data by Geant4 (gray) (color online)
Fig. 7. Calculated cross-sections of natPb(p,x)194Hg reaction in this research (red) vs. the results of other authors (blue), the evaluated cross sections from TENDL-2019 (magenta) and TENDL-2021 (green), and simulated data by Geant4 (gray) (color online)
Table 1. Chemical impurity of irradiated samples
View tableView in ArticleTable 1. Chemical impurity of irradiated samples
化学杂质
Chemical
impurity
占比
Proportion
/ %
化学杂质
Chemical
impurity
占比
Proportion
/ %
Na <0.000 006 Ni 0.000 009 Mg 0.000 005 Cu <0.000 02 Al 0.000 02 Zn <0.000 006 Si 0.000 01 Ag <0.000 01 Ca 0.000 1 Sn <0.000 02 Cr 0.000 02 Sb <0.000 02 Mn <0.000 003 Bi <0.000 10 Fe 0.000 2
Table 2. Parameters of irradiated samples
View tableView in ArticleTable 2. Parameters of irradiated samples
名称
Name
质子能量
Energy of proton / MeV
质量
Mass / mg
辐照时间
Time of radiation / min
平均质子通量
Average flux of proton / 1010 p·(cm2·s)-1
natPb40 38.0±1.0 207.6 90 1.39±0.12 natPb70 68.9±0.8 194.1 75 0.84±0.06 natPb100 99.3±0.8 201.0 40 1.43±0.10 natPb400 400±2 243.5 25 6.78±0.50
Table 3. Peak energy of nuclides of interest in samples
View tableView in ArticleTable 3. Peak energy of nuclides of interest in samples
核Nuclide 半衰期
Half life / a
能量
Energy / keV
强度
Intensity / %
207Bi 31.55 569.7 97.74 1 063.66 74.5 1 770.24 6.87 194Hg(194Au) 447 293.54 10.4 328.45 61 1 468.91 6.4 2 043.67 3.6
Table 4. Detection efficiency at 0 mm height
View tableView in ArticleTable 4. Detection efficiency at 0 mm height
核
Nuclide
样品
Sample
γ射线能量
Energy of gamma-ray
/ keV
探测效率（单位衰变计数）
Detection efficiency
(counts per decay)
绝对不确定度
Absolute
uncertainty
相对不确定度
Relative uncertainty
/ %
207Bi natPb40 569.66 6.30×10-2 2.8×10-3 4.4 1 063.6 2.78×10-2 1.2×10-3 4.3 natPb70 569.66 6.32×10-2 2.8×10-3 4.4 1 063.6 2.78×10-2 1.2×10-3 4.3 natPb100 569.66 6.32×10-2 2.8×10-3 4.4 1 063.6 2.78×10-2 1.2×10-3 4.3 natPb400 569.66 6.28×10-2 2.8×10-3 4.5 1 063.6 2.76×10-2 1.2×10-3 4.3 194Hg(194Au) natPb400 293.61 7.63×10-3 1.8×10-4 2.3 328.52 5.58×10-2 2.5×10-3 4.5
Table 5. Detection efficiency at 40 mm height
View tableView in ArticleTable 5. Detection efficiency at 40 mm height
核
Nuclide
样品
Sample
γ射线能量
Energy of gamma-ray
/ keV
探测效率（单位衰变计数）
Detection efficiency
(counts per decay)
绝对不确定度
Absolute
uncertainty
相对不确定度
Relative uncertainty
/ %
207Bi natPb40 569.66 1.58×10-2 5.1×10-4 3.2 1 063.6 7.40×10-3 2.3×10-4 3.1 natPb70 569.66 1.58×10-2 4.7×10-4 3.0 1 063.6 7.38×10-3 2.4×10-4 3.3 natPb100 569.66 1.59×10-2 5.2×10-4 3.3 1 063.6 7.38×10-3 2.1×10-4 2.8 natPb400 569.66 1.59×10-2 5.0×10-4 3.1 1 063.6 7.36×10-3 1.7×10-4 2.3 194Hg(194Au) natPb400 293.61 2.76×10-3 1.0×10-4 3.6 328.52 1.51×10-2 4.7×10-4 3.1
Table 6. Activity of 207Bi nuclide
View tableView in ArticleTable 6. Activity of 207Bi nuclide
样品Sample 活度Activity / Bq 0 mm高度0 mm height 40 mm高度40 mm height 均值Average value natPb40 0.889 ± 0.028 0.864 ± 0.020 0.872 ± 0.016 natPb70 0.196 ± 0.006 0.193 ± 0.005 0.194 ± 0.004 natPb100 0.125 ± 0.004 0.123 ± 0.003 0.124 ± 0.003 natPb400 0.100 ± 0.003 0.096 ± 0.003 0.098 ± 0.002
Table 7. Cross-sections of natPb(p,x)207Bi
View tableView in ArticleTable 7. Cross-sections of natPb(p,x)207Bi
质子能量
Energy of
proton / MeV
(Φ±∆Φ)
/ 1010 cm-2· s-1
(R±∆R)
/ 10-16 s-1
(σ±∆σ)
/ mb
38.0 ± 1.0 1.39 ± 0.12 5.66 ± 0.11 40.70 ± 3.59 68.9 ± 0.8 0.84 ± 0.06 1.62 ± 0.03 19.31 ± 1.43 99.3 ± 0.8 1.43 ± 0.10 1.88 ± 0.04 13.15 ± 0.96 400 ± 2 6.78 ± 0.50 1.97 ± 0.04 2.90 ± 0.22
Table 8. 194Hg nuclide activity
View tableView in ArticleTable 8. 194Hg nuclide activity
样品 活度Activity / Bq Sample 0 mm高度
0 mm height
40 mm高度
40 mm height
均值
Average value
natPb400 0.200 ± 0.008 0.194 ± 0.006 0.196 ± 0.005
Table 9. Cross-sections of natPb(p,x)194Hg
View tableView in ArticleTable 9. Cross-sections of natPb(p,x)194Hg
质子能量Energy of proton / MeV (Φ ± ∆Φ) / 1010 cm-2· s-1 (R±∆R) / 10-16 s-1 (σ±∆σ) / mb 400 ± 2 6.78 ± 0.50 38.70 ± 4.47 57.07 ± 7.83
Table 10. Uncertainty composition of results for natPb(p,x)207Bi
View tableView in ArticleTable 10. Uncertainty composition of results for natPb(p,x)207Bi
质子能量
Energy of
proton / MeV
∆σA
/ mb
∆σT
/ mb
∆σΦ
/ mb
∆σsum
/ mb
38.0 ± 1.0 0.76 0.03 3.51 3.59 68.9 ± 0.8 0.40 0.01 1.38 1.43 99.3 ± 0.8 0.29 0.01 0.92 0.96 400 ± 2 0.06 0.002 0.21 0.22
Table 11. Uncertainty composition of results for natPb(p,x)194Hg
View tableView in ArticleTable 11. Uncertainty composition of results for natPb(p,x)194Hg
质子能量
Energy of
proton / MeV
∆σA
/ mb
∆σT
/ mb
∆σΦ
/ mb
∆σsum
/ mb
400 ± 2 1.39 6.45 4.21 7.83
Table 12. Uncertainty composition of activity for natPb(p,x)194Hg
View tableView in ArticleTable 12. Uncertainty composition of activity for natPb(p,x)194Hg
样品
Sample
测量距离
Distance of detection
/ mm
特征γ射线Characteristic γ-ray 293.55 keV 328.47 keV δN / % δε (stat.) / % δε (syst.) / % δN / % δε (stat.) / % δε (syst.) / % natPb400 0 6.0 1.5 1.8 1.3 1.3 4.3 40 6.1 1.6 3.0 1.8 1.3 2.8
Table 13. Uncertainty composition of activity for natPb(p,x)207Bi
View tableView in ArticleTable 13. Uncertainty composition of activity for natPb(p,x)207Bi
样品
Sample
测量距离
Distance of detection
/ mm
特征射线Characteristic γ-ray 569.70 keV 1 063.66 keV δN / % δε (stat.) / % δε (syst.) / % δN / % δε (stat.) / % δε (syst.) / % natPb40 0 0.5 0.2 4.4 0.8 0.5 4.3 40 0.8 0.4 3.2 1.2 0.7 3.0 natPb70 0 1.2 0.2 4.4 1.8 0.5 4.3 40 1.7 0.4 2.9 2.5 0.7 3.2 natPb100 0 1.5 0.2 4.4 2.2 0.5 4.3 40 2.0 0.4 3.3 3.1 0.7 2.7 natPb400 0 1.7 0.2 4.5 2.6 0.5 4.3 40 2.4 0.4 3.1 3.6 0.7 2.2
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Qize LIU, Ofoq Normahmedov, Mingkun JING, Wenhan DAI, Zhi ZENG, Tao XUE, Yang TIAN, Ming ZENG, Hao MA, E Titarenko Yu, K V Pavlov, A Yu Titarenko, V M Zhivun, A A Kovalishin, T V Kulevoy, R S Khalikov. Determination of cross-sections of natPb(p,x)207Bi and natPb(p,x)194Hg by GeTHU[J]. NUCLEAR TECHNIQUES, 2023, 46(9): 090501
Paper Information
Category: Research Articles
Received: Mar. 17, 2023
Accepted: --
Published Online: Oct. 8, 2023
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