What is pair annihilation process?

Pair production and annihilation There exists an inverse process to pair production called pair annihilation, in which a particle and its antiparticle collide and annihilate each other, the total energy of the two particles appearing as electromagnetic radiation.

What is pair production and annihilation of matter?

Annihilation is a process in which the electron and positron combine to form a photon, it can also be called as the reverse process of pair production, as in pair production the photons split into electron and positron, and in the annihilation of matter, the electron and positron combine to form photons.

What is particle creation and annihilation?

A particle and its corresponding anti particle are created through pair production and destroyed through annihilation. This theory comes from Einstein’s ‘Special theory of Relativity’ through which mass can turn into energy and energy into mass.

How annihilation is produced?

In particle physics, annihilation is the process that occurs when a subatomic particle collides with its respective antiparticle to produce other particles, such as an electron colliding with a positron to produce two photons.

What is pair production in radiology?

Pair production is a process in which a gamma ray of sufficient energy is converted into an electron and a positron. A fundamental law of mechanics, given by Newton, is that in any process total linear (as well as angular) momentum remains unchanged.

What is meant by pair production and pair annihilation write balanced equations for the same?

The inverse process of pair annihilation is called pair production. Pair annihilation is the principle behind positron emission tomography. Balanced equation: e−+e+=2γ and other examples include proton-antiproton annihilation and Higgs production.

Why does annihilation produce two photons?

Annihilation occurs when a particle and a corresponding antiparticle meet and their mass is converted into radiation energy. Two photons are produced in the process (as a single photon only would take away momentum which isn’t allowed, as no outside forces act).

What is pair production in xray?

Why are two photons produced in pair annihilation?

What is pair production example?

Pair production is the creation of a subatomic particle and its antiparticle from a neutral boson. Examples include creating an electron and a positron, a muon and an antimuon, or a proton and an antiproton. Pair production often refers specifically to a photon creating an electron–positron pair near a nucleus.

What is pair production explain it with the help of an equation?

Solution : Pair production : When an energetic y-ray photon falls on a heavy substance, it is absorbed by some nucleus of the substance, and its energy give rise to the production of an electron and a positron. This phenomenon is called pair production. <

What is annihilation in gamma rays?

Annihilation radiation is a term used in Gamma spectroscopy for the photon radiation produced when a particle and its antiparticle collide and annihilate. Most commonly, this refers to 511-keV photons produced by an electron interacting with a positron.

Why two photons are created in pair annihilation?

(The reason TWO photons are produced may seem a bit complicated, but two are needed to conserve both momentum and energy. Briefly, since the electron and the positron were at rest, the total system had no momentum.