Energy loss correction on multiple Coulomb scattering of muons simulated by Geant4

Energy loss correction on multiple Coulomb scattering of muons simulated by Geant4
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Geant4模拟μ子多次库仑散射的能量损失校正

DOI:
10.1088/1402-4896/ac6f8c
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发表时间:
2022-05
期刊:
影响因子:
2.9
通讯作者:
Long Wei
Long Wei
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Chao Zhang;Xingzhong Cao;Chong Li;Jiajia Zhai;Peng Kuang;Shuoxue Jin;Baoyi Wang;Long Wei

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介子通过物体的散射角分布是加速器介子散射成像应用的重要参考数据。在这项研究中,使用蒙特卡罗工具包Geant4模拟了加速器能区内的介子散射角分布,并用Molière理论进行了计算。结果表明,用Molière理论计算加速器能区内的介子散射角分布时,会产生明显的偏差。我们证明了这种偏差是由能量损失引起的。因此,在Molière理论的基础上引入了能量损失修正,计算结果与Geant4模拟结果吻合较好。此外,对于不同能量的介子,利用莫里哀理论计算了不同能量损失下的相对误差,从而有助于阐明能量损失对加速器介子散射成像的重要性。
The scattering angle distribution of muons passing through an object is crucial reference data for the application of the accelerator muon scattering imaging. In this study, the scattering angle distribution of muons in the accelerator energy region was simulated using the Monte Carlo toolkit Geant4 and calculated using the Molière’s theory. The results show that a significant deviation occurs when Molière’s theory is used to calculate the scattering angle distribution of muons in the accelerator energy region. We demonstrated that the deviation is due to the energy loss. Therefore, an energy loss correction was introduced on Molière’s theory, after which the calculated results are in good agreement with the Geant4 simulation. Furthermore, the relative error caused by using Moliere’s theory with different energy losses was calculated for muons of different energies, which can help clarify the importance of energy loss for accelerator muon scattering imaging.
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影响因子: 10.6
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