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xrf penetration - Overview of XRF


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. X-ray fluorescence (XRF) is the emission of characteristic "secondary" (or fluorescent) X-rays from a material that has been excited by being bombarded with high-energy X-rays or gamma rays.The phenomenon is widely used for elemental analysis and chemical analysis, particularly in the investigation of metals, glass, ceramics and building materials, and for research in geochemistry, forensic.

Using XRF on cladded and painted aluminum alloy parts or materials, is there a need to sand until the substrate, or is the depth of penetration enough for an accurate measurement? For painted or coated aluminum alloys, it is usually preferred or required to remove the . Penetration depth is calculated from the mass absorption coefficient and the "density". The density value ρ is expressed as a combination of the specific gravity of the material and the packing.

The depth of penetration can be calculated by the following equation: I/I 0 = e [-(μ/ρ)x] (1) where I is the quantity of photons returning from the sample, I 0 is the quantity of photons entering the sample, μ/ρ represents the mass attenuation coefficient of a given element for a particular matrix, and x represents the density of the object. in EDX the depth of the penetration (and therefore the region from which characteristic X-rays are generated = 'interaction volume') is related to the energy of the incident beam and the density.

Achieve rapid material characterization and analysis to ensure product chemistry specifications are met. X-Ray Fluorescence (XRF) technology is the gold-standard for accurate, nondestructive elemental analysis in a wide range of applications including cement, metals, mining, petroleum, chemicals, environmental and food. Thermo Scientific portable analytical instruments deliver instant, actionable data for quick decision making in critical situations. Combining sophisticated technologies including XRF, NIR, Raman, and FTIR, and an incredibly easy-to-use interface, our portable analyzers provide rapid, reliable chemical identification and material verification to increase throughput, raise quality and reduce.