Basic Study for Quantitative Evaluation of Concreate Samples Containing Cesium on the Beam Spot Position
Basic Study for Quantitative Evaluation of Concreate Samples Containing Cesium on the Beam Spot Position
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束斑位置上含铯混凝土样品定量评价的基础研究
DOI：
10.1109/nss/mic44845.2022.10399141
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发表时间：
2022
期刊：
影响因子：
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通讯作者：
N. Hagura
中科院分区：
文献类型：
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作者：
Ryoga Kamata;J. Kawarabayashi;N. Hagura
粒子诱导X射线发射（PIXE）是一种元素分析方法，其中将加速器加速的MeV离子束照射到目标上，并通过检测器检测所产生的特征X射线。 PIXE因其高灵敏度和同时分析多种元素的能力而被称为可用于各个领域的元素分析的方法。我们采用全球广泛使用的光谱分析软件GUPIX作为PIXE分析方法的定量方法。此外，利用核反应的共振峰来校准串联加速器的质子能量。这种分析技术被称为粒子诱导伽马射线发射（PIGE），它利用 27Al(p,p'γ)27Al 反应的共振峰来确认详细的质子能量。实验结果表明，实际质子能量比GVM（发电电压表）装置读取的能量高出约3.4 - 3.6%。使用岩石标准样品 JLk-1 检查质子能量的不确定性是否影响定量值。对于含Cs的标准化混凝土样品，检查质子束的束斑并调整样品位置，获得样品同一截面上的浓度分布，以评估样品同一截面上的Cs浓度分布。因此，我们获得了通过正确识别束斑来获得同一截面上 Cs 浓度分布的前景。
The particle induced X-ray emission (PIXE) is a method of elemental analysis in which an accelerator-accelerated MeV ion beam is irradiated to a target and the characteristic X-rays generated are detected by a detector. PIXE is known as a method that can be used for elemental analysis in various fields because of its high sensitivity and ability to analyze multiple elements simultaneously. We employed GUPIX, a spectral analysis software widely used worldwide, as a method of quantification from the PIXE analysis method. In addition, the resonance peak of the nuclear reaction was used to calibrate the proton energy of the tandem accelerator. This analytical technique is known as particle induced Gamma-ray emission (PIGE), which uses the resonance peak of the 27Al(p,p'γ)27Al reaction to confirm the detailed proton energy. The experimental results show that the actual proton energy is about 3.4 - 3.6 % higher than the energy read by the GVM (Generating Voltmeter) device. Rock standard sample JLk-1 was used to examine whether uncertainty in proton energy affects the quantitative values. For the standardized concrete sample containing Cs, the beam spot of the proton beam was checked and the sample position was adjusted to obtain the concentration distribution on the same cross section of the sample in order to evaluate the Cs concentration distribution on the same cross section of the sample. As a result, we obtained a prospect to obtain the concentration distribution of Cs on the same crosssection by properly identifying the beam spot.
冈田实验室-RCAST，东京大学
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