In the process of irradiating a material, the radiation it emits, in the form of photons, has the potential to interact with tightly bound electrons, those in close proximity to the atomic nucleus. This interaction can result in the displacement of an electron, endowing it with kinetic energy, which is referred to as the photoelectric effect. The electron that is emitted as a consequence of this effect is known as a photoelectron. This particular form of interaction holds significance, particularly in the realm of diagnostics.