论文标题
反射率光谱作为吸收 - 是正确的吗？
Reflectivity spectra as absorption ones -- is it correct ?
论文作者
论文摘要
X射线谐振和Mössbauer反射率的近似表达式是针对半芬酸镜的限制案例开发的，并在总易感性和超薄谐振层的情况下增加了较小的谐振。结果表明，在该区域中，反射率确实可以表明对共振敏感性的虚构部分的线性依赖性，因此在这些情况下，将反射率光谱（R-Spectra）作为吸收谐振光谱的考虑，可以证明是合理的。但是，我们已经选择了几种效果，即即使是很小的放牧角度，也会产生R-光谱形状的必要分散扭曲。已经表明，如果非共振吸收相对较大，则对R光谱形状的色散校正大多是必不可少的。模型计算表明，使用用于吸收光谱的软件从R-Spectra提取的定量光谱信息可能不准确。
Approximate expressions for X-ray resonant and Mössbauer reflectivity in the total external reflection region are developed for the limiting cases of a semiinfinite mirror with a small resonant addition to the total susceptibility and for the case of an ultrathin resonant layer. It is shown that in this region the reflectivity can really show the linear dependence on the imaginary part of resonant susceptibility, therefore in these cases the consideration of reflectivity spectra (R-spectra) as absorption resonant spectra, undertaken in several experimental works, can be justified. However, we have selected several effects producing essential dispersive distortions of the R-spectrum shape even for very small grazing angles. It has been shown that the dispersive corrections to the R-spectrum shape are mostly essential if the nonresonant absorption is relatively large. Model calculations demonstrate that the quantitative spectroscopic information extracted from R-spectra by using the software developed for absorption spectra can be inaccurate.
