Knowledge What is the Range of XRF Analysis? (1 nm to 50 µm)
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Tech Team · Kintek Solution

Updated 1 month ago

What is the Range of XRF Analysis? (1 nm to 50 µm)

XRF analysis, or X-ray fluorescence analysis, is a powerful technique used to measure the thickness of materials.

The range of XRF analysis spans from a minimum detection thickness of approximately 1 nm to a maximum of about 50 µm.

Below 1 nm, the characteristic X-rays are obscured by noise.

Above 50 µm, the thickness saturates, preventing additional X-rays from reaching the detector.

What is the Range of XRF Analysis? (1 nm to 50 µm)

What is the Range of XRF Analysis? (1 nm to 50 µm)

1. Minimum Detection Thickness (1 nm)

At thicknesses below 1 nm, the characteristic X-rays emitted by the material under analysis are not detectable.

This is because they are submerged in the noise signal.

This limitation is due to the fundamental sensitivity of the XRF technology and the background noise inherent in the detection process.

2. Maximum Detection Thickness (50 µm)

When the thickness of the material exceeds 50 µm, the X-rays emitted by the inner layers of the material cannot penetrate the outer layers to reach the detector.

This results in a saturation effect where increasing the thickness beyond this point does not yield additional detectable X-rays.

This is because the X-rays are absorbed or scattered by the overlying material, preventing them from reaching the detector.

Thus, no further changes in thickness can be measured.

These limits define the practical range of XRF analysis in terms of material thickness.

They ensure that the technology is effective within these boundaries for accurate and reliable measurements.

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