How are electron-positron pairs created?
How are electron-positron pairs created?
In the pair production process, an incident gamma ray of sufficiently high energy is annihilated in the Coulomb field of a nearby charged particle, resulting in the creation of an electron–positron pair.
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 happens when a positron and electron come together?
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 does pair production produce?
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 creation?
pair creation – the transformation of a gamma-ray photon into an electron and a positron when the photon passes close to an atomic nucleus. pair formation, pair production.
What is pair production equation?
Pair production can be represented by an equation which represents the conservation of total energy (or mass-energy): hf = 2(m0 c^2) + K(-e) + K(+e)
What is difference between pair creation and annihilation?
The conversion of a photon into an electron-positron pair on its interaction with the strong electric field surrounding a nucleus is known as pair production. Annihilation of matter is the converse of pair production in which an electron and positron combine to produce two photons.
What is produced when an electron and positron annihilate?
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 produced as a result of pair production quizlet?
Two particles are produced, positron and electron. A process that occurs after pair production. The positron that is created in pair production travels until it strikes an electron with which it interacts.
What is pair production and how does it differ from pair annihilation?
Hint: Pair production is the process in which the photons fall on a nucleus and there is the formation of electron and positron pair, where positron is the charge having a mass equal to that of the electron but possess positive charge, on the other hand, annihilation is the process in which the electron and positron …
What is pair production with example?
Pair production is the creation of an elementary particle antrparticle from a neutron boron. Examples include creating an electron and a proton, a muon and an anti muon or a proton or an anti proton. Pair production often refers specifically to a proton creating an electron proton pair near a nucleus.
What happens to positron after pair production?
The positron that is formed quickly disappears by reconversion into photons in the process of annihilation with another electron in matter.
How pair production differ from pair annihilation?
In the pair production process, the photons fall on a nucleus and electron and positron is formed γ → e−+e+, while in annihilation the reverse process of pair production takes place e−+e+→ γ.
What is coherent scattering?
Coherent scattering is also known as unmodified, Rayleigh, conventional, or elastic scattering, and is one of three configurations of photon interaction. Mostly, coherent scattering occurs when the energy of, for instance, an X-ray or gamma photon is smaller than the ionization energy of an atom.
At what energy does pair production occur?
Pair production can only occur if the incident photon energy is at least 1.022 MeV. As the photon interacts with the strong electric field around the nucleus it undergoes a change of state and is transformed into two particles (essentially creating matter from energy): one electron.
What is produced when an electron and a positron annihilate?