XRF Testing>>How Does XRF Instrument Work

XRF Testing

            XRF is possible by the behavior of atoms when they interact with X-rays in analysis of major and trace elements in geological materials by XRF. An XRF spectrometer works, because if a sample is illuminated by an intense X-ray beam X, known as the incident beam, a part of the energy is distributed, but it is also included in the sample in a manner dependent on the chemistry. The incident X-ray beam is usually made from an Rh target, while W, Mo, Cr and others may be used, depending on the application. This first X-ray beam illuminates the sample, he is reportedly excited. The sample excited in turn emits X-rays along a spectrum of wavelengths characteristic of the types of atoms present in the sample. How does this happen? The atoms in the sample absorb energy X-rays by the ejection of electrons from the lower layer (typically K and L) energy. The emitted electrons are replaced by electrons from an outer shell of higher energy. When this happens, energy is released due to the decrease of the binding energy of the orbital electrons of internal versus external cannula. This release of energy in the form of an X-ray emission property indicating the type of atom present. If a sample many elements are present, which is typical for most minerals and rocks, using a spectrometer dispersion wavelength as that contains an EPMA, the separation of a complex X-ray spectrum emitted in the wavelength characteristic of each element present . Different types of sensors (gas proportional and scintillation) are used to measure the intensity of the transmitted beam. The disadvantages are often used to power the wavelength (> 0.15 nm) measure X-ray spectra are typical for the K of elements lighter than Zn. The scintillation detector is widely used for the shorter wavelengths in the spectrum of X-ray analysis (K spectra of Nb element in I. The spectra of Th and U). X-ray spectra by wavelength K (produced from Zn and Zr L spectra of Ba and rare earth elements) are generally measured using two detectors in tandem. The intensity of the energy measured by these sensors is proportional to the abundance of the element in the sample. The exact value of this proportion for each component is obtained by comparison with the standards of minerals or rocks whose composition is known from previous analysis of other techniques.

XRF Testing