Types Of X Ray Interaction With Matter

Higher energy shorter the wavelenght.

Types of x ray interaction with matter. Coherent scatter compton scatter photoelectric effect pair production photodisintegration. The strength of these interactions depends on the energy of the x rays and the elemental composition of the material but not much on chemical properties since the x ray photon energy is much higher than chemical binding energies. In this interaction an incident x ray photon enters a tissue atom interacts with an orbital electron generally a middle or outer shell electron and removes it from its shell. X ray overview x ray photon are created by interaction of energetic electron with the matter at atomic level.

Since the gamma rays are in substance only a very high energy photons they are very penetrating matter and are thus biologically hazardous. In order to demonstrate the interaction of radiation with matter a laser beam is directed onto a white and a black surface onto a glass pane and onto a mirror. The first is the photoelectric effect where a photon uses up all of its energy to eject an electron from an atom. Low energy x ray tend to interact with whole atom.

X ray photons are created by the interaction of energetic electrons with matter at the atomic level. This includes the following interactions. Another name for coherent scatter. When radiation hits an object different phenomena show how the incident radiation can interact with matter.

Photons x ray and gamma end their lives by transferring their energy to electrons contained in matter. Nature of an interaction of a beta radiation with matter is different from the alpha radiation despite the fact that beta particles are also charged particles. Gamma rays also known as gamma radiation refers to electromagnetic radiation no rest mass no charge of a very high energies gamma rays are high energy photons with very short wavelengths and thus very high frequency. While the electron will move around and ionize.

The probability that a x ray will undergo a photoelectron interaction is a function of both the x ray energy and the of the atom with which it interacts atomic number a small variation in the atomic number or x ray energy results in a large change in the chance of photoelectric interaction. Moderate energy x ray with electron. In comparison with alpha particles beta particles have much lower mass and they reach mostly relativistic energies. Classical scatter thompson.

Although a large number of possible interactions are known there are three key interaction mechanisms with matter. Description of gamma radiation. Compton scattering occurs throughout the diagnostic range but generally involves moderate energy x ray photons e g 20 40 kev. Classical scatter compton scatter photoelectric.

X ray interactions are important in diagnostic examinations for many reasons. 5 types of x ray interactions with matter. X rays have very shortwavelenght no larger than 10 8 to 10 9 m.