![]() ![]() The characteristic x-rays are labelled K, L, M or N to denote the shell they originated from. This is ideally suited for testing metal wire, small components of jewellery or thin seams of solder.Ī detector measures the energy distribution of the x-ray fluorescence radiation emitted by the sample, which is depicted as a signal spectrum. A filter made of nickel or aluminium is used to optimise the energy distribution of the primary x-radiation for the particular measurement application.Ī collimator (aperture) is used to restrict the size of the x-ray beam, which can create a measurement spot as small as 0.3mm. These electrons strike the anode material of the tube (typically made of tungsten) which then creates the x-radiation. In an energy dispersive XRF instrument, primary x-rays are generated within the x-ray tube, in which a cathode is heated until it emits electrons which are then accelerated by applying a high voltage. This process is known as X-ray Fluorescence (XRF). Electrons from a higher shell then drop into the inner shell of the atom to fill the gap, and as a result they give off secondary x-rays with energies characteristic of the elements excited. When an incident x-ray hits an inner shell electron within the atoms of a material, the electron may be ejected. Rontgen in 1895, X-rays are a high energy form of electromagnetic radiation, with wavelengths ranging from 0.01 to 10 nanometres. What is XRF?ĭiscovered accidentally by German physicist Wilhelm K. This article outlines the basic principles of ED-XRF (Energy Dispersive X-Ray Fluorescence), and how we can use it to give fast and accurate results to our customers across a wide range of industries. We can now offer accurate analysis within an hour, and with no damage to the test item. ![]() Our experience in assaying precious metals has been expanded to now include other metals and alloys. The Sheffield Assay Office has been analysing precious metals for over 240 years, but in the last 15 years this process has been revolutionised by the use of XRF. Explaining XRF and how it has revolutionised precious metal analysis ![]()
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