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首页> 外文期刊>Journal of Nuclear Physics, Material Sciences, Radiation and Applications >How do Uncertainties in Atomic Parameters Influence Theoretical Predictions of X-Ray Production Cross Sections By Proton Impact?
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How do Uncertainties in Atomic Parameters Influence Theoretical Predictions of X-Ray Production Cross Sections By Proton Impact?

机译：原子参数的不确定性如何通过质子碰撞影响X射线产生截面的理论预测？

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摘要

The emission of characteristic X-rays induced by proton impact is a phenomenon known since the first half of the 20~(th) century. Its more widely known application is the analytical technique Particle Induced X-ray Emission (PIXE). Several models have been developed to calculate, first, ionization cross sections and then the subsequent X-ray production cross sections. However, to carry out the comparisons of these predictions with experimental data it is necessary to use atomic parameters databases (fluorescence yields, Coster-Kronig transition probabilities, emission rates) that also have experimental uncertainties. In this work it is demonstrated how these values do not allow to decide which model describes more accurately the cross sections, due to a final “theoretical uncertainty” obtained through the propagation of the original uncertainties.
机译：自20世纪上半叶以来，由质子撞击引起的特征X射线的发射是已知的现象。其更广为人知的应用是分析技术“粒子诱导X射线发射（PIXE）”。已经开发了几种模型来首先计算电离截面，然后计算随后的X射线产生截面。但是，为了将这些预测值与实验数据进行比较，必须使用同样具有实验不确定性的原子参数数据库（荧光产率，Coster-Kronig跃迁概率，发射率）。在这项工作中，由于通过最终不确定性的传播获得了最终的“理论不确定性”，这些值如何无法决定更精确地描述截面的模型。

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