钆L X射线发射光谱的线能量、线宽和相对跃迁几率的实验测定
Experimental determination of line energies, line widths and relative transition probabilities of the Gadolinium L X-ray emission spectrum
摘要：
本文利用单色化同步辐射研究了钆的完整L-发射光谱的能量、自然线宽和相对跃迁几率。这些测量是在BESSY II的PTB实验室中通过内部建造的von Hamos光谱仪实现的，该光谱仪基于多达两个全圆柱HAPG镶嵌晶体。冯哈莫斯光谱仪校准的弹性散射光子从所采用的同步辐射光束线，导致一个明确的能量尺度和实验确定的光谱仪响应。进行钆L子壳层的选择性激发以确保不同L子壳层的相邻发射线的鲁棒解卷积。实验结果进行了讨论的背景下，现有的数据从共同的数据库和公布的值，因为显着的偏差，特别是L $γ_2$和L $γ_3$发射线，观察。我们进一步证实和讨论了两个卫星线在低能侧的L $β_{2,15}$和L $γ_1$发射线所产生的N $_{4,5}$次壳层。
英文摘要：
In this work the complete L-emission spectrum of gadolinium with respect to line energies, natural line widths, and relative transition probabilities was investigated using monochromatized synchrotron radiation. The measurements were realized in the PTB laboratory at BESSY II by means of an in-house built von Hamos spectrometer based on up to two full-cylinder HAPG mosaic crystal. The von Hamos spectrometer is calibrated by means of elastically scattered photons from the employed synchrotron radiation beamline leading to a well-defined energy scale and an experimentally determined spectrometer response. A selective excitation of the gadolinium L subshells was carried out to ensure a robust deconvolution of neighboring emission lines of different L subshells. The experimental results are discussed in the context of existing data from common databases and published values since significant deviations, especially for the L$γ_2$ and L$γ_3$ emission lines, are observed. We further substantiate and discuss two satellite lines at the low-energy side of the L$β_{2,15}$ and L$γ_1$ emission lines arising from the N$_{4,5}$ subshell.
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