We will probably use the terms interchangeably here as well. The ‘x-ray intensity is proportional to both the elemental concentration and the strength of the ionizing source. An incoming X-ray knocks out an electron from one of the orbitals surrounding the nucleus. © 2019 AMPTEK, Inc. All rights reserved. upon deceleration, changing direction or Watch the recordings here on Youtube! XRF measures the energy and intensity of secondary x-rays produced, as illustrated in Figure 2. XRF Poster Downloads - Quick Guide and Periodic Table XRF technique consists of irradiating a solid or a liquid sample with high energy X-rays which results in the secondary emission of X-rays (fluorescence). In the following we will be using the term photons or … An X-ray fluorescence (XRF) spectrometer is an x-ray instrument used for routine, relatively non-destructive chemical analyses of rocks, minerals, sediments and fluids.