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本文提出合理使用滤波片以提高峰背比的问题.选靶时,除了考虑样品对入射X光的K_α射线吸收尽可能小外,还应使滤波片对样品的K系荧光吸收尽可能大,并使波片放置要适宜.当一个滤波片同时具有滤掉原射线束中的K_β成份和消除样品的K系荧光的双重作用时,峰背比可跟相同条件下衍射光程中安置石墨单色器的效果相比似.文中讨论了变更滤波片位置对背底的影响和在某些情况下使用单色器时衍射花样背底仍然很高的原因.
In this paper, we propose a reasonable use of the filter to improve the peak back-to-back ratio.Selecting the target, in addition to taking into account the sample of incident X-ray K_α ray absorption as small as possible, the filter should make the sample K-type fluorescence absorption as large as possible, And the wave plate placement should be appropriate.When a filter at the same time with the original beam to filter out the K_β component and K-ray fluorescence of the sample to eliminate the dual role, the peak back than with the same conditions can be placed under the diffraction of graphite single The effect of the shader is similar.The paper discusses the effect of changing the position of the filter on the background and the reason why the diffractive pattern back is still very high in some cases when using a monochromator.