What is produced by electron-positron annihilation?

Electron-positron annihilation is the process in which a positron collides with an electron resulting in the annihilation of both particles. Electrons (or β- particles) and positrons (or β+ particles) are of equal mass but opposite charge. Positrons are the antimatter equivalent of an electron, produced from B+ decay.

What happens when an electron and positron annihilate each other?

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 electron-positron pair production and pair annihilation?

The conversion of a photon into an electron-positron pair on its interaction with the strong electric field surrounding a nucleus is called pair production. The converse of pair production in which an electron and positron combine to produce two photons is known as annihilation of matter.

What is the product of annihilation?

The amount of energy (E) produced by annihilation is equal to the mass (m) that disappears multiplied by the square of the speed of light in a vacuum (c)—i.e., E = mc2.

How is a muon created?

Muons are generated in the Earth’s upper atmosphere by cosmic rays (high energy protons) colliding with atomic nuclei of molecules in the air.

What is annihilation and pair production?

The conversion of a photon into an electron-positron pair on its interaction with the strong electric field surrounding a nucleus is called pair production. The converse of pair production in which an electron and position combine to produce a photon is known as annihilation of matter.

What happens when electrons and positrons collide?

If it does not travel in vacuum, a positron quickly encounters one of these electrons. When they meet, the positron and the electron, which are Antiparticles of each other, destroy themselves mutually, they annihilate. Two annihilation gamma with equal energy are also emitted back to back.

What is pair annihilation example?

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 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.

Can we convert electrons into muons?

Electron to Muon Conversion in Electron-Nucleus Scattering as a Probe of Supersymmetry. We suggest that e\to \mu conversion in low-energy electron-nucleus scattering is a new and potentially observable indirect signal of supersymmetry and should be searched for in experiment.

Why are 2 photons produced in annihilation?

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).

When an electron and positron annihilate the energy released is approximately?

The total amount of energy released when a positron and an electron annihilate is 1.022 MeV, corresponding to the combined rest mass energies of the positron and electron. The energy is released in the form of photons.

What do positrons decay into?

Because positron emission decreases proton number relative to neutron number, positron decay happens typically in large “proton-rich” radionuclides. Positron decay results in nuclear transmutation, changing an atom of one chemical element into an atom of an element with an atomic number that is less by one unit.

When an electron and a positron meet and annihilate the mass-energy of the particles is carried away by?

gamma rays
When particle and antiparticle meet, they mutually annihilate. An electron and positron annihilate into two gamma ray photons (units of radiation), as shown in the diagram, and the gamma rays carry away the mass-energy of the particles according to E = mc2.

What happens when positrons and electrons collide?

Can an electron decay into a muon?

Because charge must be conserved, one of the products of muon decay is always an electron of the same charge as the muon (a positron if it is a positive muon). Thus all muons decay to at least an electron, and two neutrinos.

How are muon particles created?

The muons that hit the Earth result from particles in the Earth’s atmosphere colliding with cosmic rays—high-energy protons and atomic nuclei that move through space at just below the speed of light. Muons exist for only 2.2 microseconds before they decay into an electron and two kinds of neutrinos.

How is muon formed?

Why does annihilation produce two photons?