Edxrf critical penetration depth
It is known that X-Rays will penetrate some way into a material. For XRF analysis, the important question is from what depth within the sample does the spectrum.
X-Ray Fluorescence Analysis
Penetration Depths
Penetration Depth – how deep the primary X-ray radiation into the sample? Escape Depth (Analysis Layer) – how deep the fluorescence (secondary) radiation can be detected from? The more dense the sample, the less thickness it takes to achieve the x-ray fluorescence definition of.
Description:For XRF analysis, the important question is from what depth within the sample does the spectrum arise. Unfortunately this is not a simple question, as there are many factors involved. The two main points to consider are a the depth of penetration of the primary X-Ray beam into the sample, and b the escape depth from which fluorescent X-Rays can be detected. Both of these are directly linked to the energy of the X-Rays - the higher the X-Ray energy the deeper the X-Ray penetrates.
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