NUCLEAR TECHNIQUES, Volume. 46, Issue 12, 120401(2023)
Dual-energy targeted gamma radiation sampling technique based on cerium bromide scintillation detector
Figures & Tables(13)
Fig. 1. Schematic diagram of the structure of the dual-energy targeted γ radiation sampling probe with a cerium bromide scintillation detector
Fig. 2. Diagram of Monte Carlo numerical simulation geometric model for dual energy γ radiation sampling probe
Fig. 3. MC simulated deposition energy spectra for 6 mm lead shield of dual-energy targeted γ radiation sampler with cerium bromide scintillation detector
Fig. 4. MC simulation geometry model with interfering radiation source target(a) The outer perimeter of the target is wrapped with a 10 cm thick uranium layer, which is an interference source with twice the radiation of the target body; (b) The outer perimeter of the target is wrapped with two 10 cm thick uranium layers, which is an interference source with twice the radiation of the target body; (c) The outer circumference of the target is partially wrapped, and the uranium content is twice that of the target body, which is an interference source with twice the radiation of the target body; (d) The outer perimeter of the target is wrapped with two partial layers, and the 10 cm thick uranium layer is an interference source with twice the radiation of the target body
Fig. 5. Arrangement of dual-energy targeted gamma radiation sampling probe and two radium sources
Fig. 6. Measured gamma spectrum of dual-energy targeted gamma radiation sampling instrument with cerium bromide scintillation detector and a 6 mm lead shielding layer
Fig. 7. Arrangement of dual-energy targeted gamma radiation sampling probe and uranium standard model
Table 1. Monte Carlo numerical simulation results for directional scale coefficients of lead shielding layers with different thicknesses
View tableView in ArticleTable 1. Monte Carlo numerical simulation results for directional scale coefficients of lead shielding layers with different thicknesses
屏蔽层厚度Shielding thickness / mm N2,In N1,In 定向比例系数Directional roportional coefficient a N2,Out N1,Out 定向比例系数Directional proportional coefficient A 3 957 257 0.268 920 276 0.300 4 957 257 0.268 687 240 0.349 5 957 257 0.268 526 208 0.396 6 957 257 0.268 392 177 0.451 7 957 257 0.268 294 156 0.529
Table 2. Comparison of N2,In MC analog values and calculated values for different interference radiation source targets
View tableView in ArticleTable 2. Comparison of N2,In MC analog values and calculated values for different interference radiation source targets
屏蔽层厚度Shielding thickness / mm N2,Sum N1,Sum N2,In模拟值Analog value N2,In计算值Calculated value 相对误差
Relative error / %
干扰辐射源为(a)The interference radiation source is (a) 3 2 337 673 957 904 -5.59 4 2 022 626 957 989 3.33 5 1 789 584 957 973 1.60 6 1 602 544 957 976 1.98 7 1 458 515 957 985 2.87 干扰辐射源为(b)The interference radiation source is (b) 3 2 772 802 957 940 -1.80 4 2 379 757 957 914 -4.50 5 2 077 700 957 954 -0.40 6 1 843 658 957 949 -0.91 7 1 662 616 957 1008 5.32 干扰辐射源为(c)The interference radiation source is (c) 3 2 107 603 957 931 -2.80 4 1 833 561 957 973 1.66 5 1 636 524 957 965 0.80 6 1 476 489 957 967 0.99 7 1 355 464 957 971 1.43 干扰辐射源为(d)The interference radiation source is (d) 3 2 324 667 957 949 -0.90 4 2 012 627 957 936 -2.25 5 1 780 583 957 955 -0.20 6 1 596 546 957 953 -0.45 7 1 457 514 957 983 2.66
Table 3. Measurement results for dual-energy targeted gamma radiation sampling instrument with a 6 mm lead shielding layer and two radium sources
View tableView in ArticleTable 3. Measurement results for dual-energy targeted gamma radiation sampling instrument with a 6 mm lead shielding layer and two radium sources
正面距离Frontal distance / m 侧面距离Side distance 0.6 m 正面距离Frontal distance 0.9 m 侧面距离Side distance 1.2 m N1,Sum N2,Sum N1,Sum N2,Sum N1,Sum N2,Sum 0.6 40 816 126 263 40 106 124 055 40 940 126 650 0.9 16 821 51 613 16 821 51 616 17 618 54 095 1.2 11 085 33 770 10 732 32 673 10 630 32 354
Table 4. Comparison of the total net peak area of 0.609 MeV gamma rays measured in the lead shield angle under a positive and lateral arrangement of two radium sources and the calculated value
View tableView in ArticleTable 4. Comparison of the total net peak area of 0.609 MeV gamma rays measured in the lead shield angle under a positive and lateral arrangement of two radium sources and the calculated value
正面距离Frontal distance / m 侧面距离Side distance 0.6 m 侧面距离Side distance 0.9 m 侧面距离Side distance 1.2 m N2,In实验值Experimental value N2,In计算值Calculated value 相对误差Relative error / % N2,In实验值Experimental value N2,In计算值Calculated value 相对误差Relative error / % N2,In实验值Experimental value N2,In计算值Calculated value 相对误差
Relative error / %
0.6 90 748 89 316 -1.58 88 714 87 750 -1.09 88 650 89 590 1.06 0.9 36 870 36 368 -1.36 37 394 36 370 -2.74 37 308 38 128 2.20 1.2 23 314 23 712 1.71 22 694 22 934 1.06 23 296 22 708 -2.52
Table 5. Measurement results
View tableView in ArticleTable 5. Measurement results
编号Number CU / g∙t-1 N1,Sum N2,Sum N2,In UY-0.02-Ⅱ 195.32 678 1 859 880 ThY-0.04-Ⅱ 9.23 412 935 50 KY-6-Ⅱ 4.54 198 447 22
Table 6. Experimental model measurement results
View tableView in ArticleTable 6. Experimental model measurement results
编号Number CU推荐值Recommended value / g∙t-1 CU计算值Calculated value / g∙t-1 N1,Sum N2,Sum N2,In 相对误差Relative error / % UThKY-0.007-0.021-3-Ⅱ 63.9 60.9 1 208 494 278 -4.69 UHGL-5 140.31 135.34 1 299 474 612 -3.54 ThHGL-4 8.55 8.90 821 362 45 4.06 KHGL-7 3.01 2.88 402 178 18 -4.45
Tools
Get Citation
Copy Citation Text
Hongwu LIU, Liangquan GE, Jitong WU, Xiaofeng YANG, Zhipeng DENG, Chuanfeng TANG, Maolin XIONG. Dual-energy targeted gamma radiation sampling technique based on cerium bromide scintillation detector[J]. NUCLEAR TECHNIQUES, 2023, 46(12): 120401
Paper Information
Category: Research Articles
Received: Jun. 28, 2023
Accepted: --
Published Online: Mar. 7, 2024
The Author Email: GE Liangquan (葛良全)
© Copyright 2018-2021 | Chinese Laser Press.
All Rights Reserved 沪ICP备15018463号-20