Get it on Google Play
New! Download Unionpedia on your Android™ device!
Faster access than browser!
New! Save your pages! » Create account

The positron or antielectron is the antiparticle or the antimatter counterpart of the electron. [1]

78 relations: Alpha Magnetic Spectrometer, American Astronomical Society, Annihilation, Antimatter, Antiparticle, Atomic mass unit, Baryon asymmetry, Becquerel, Beta decay, Beta particle, California Institute of Technology, Carl David Anderson, Chung-Yao Chao, Cloud chamber, Cosmic ray, Cosmos (magazine), CP violation, Dark matter, Dirac equation, Dirac sea, Dmitri Skobeltsyn, Electric charge, Electromagnetism, Electron, Electron–positron annihilation, Electronvolt, Elementary charge, Elementary particle, Ernst Stueckelberg, Fermion, Flux, Frédéric Joliot-Curie, Gamma ray, Gravity, International Space Station, Irène Joliot-Curie, J. Robert Oppenheimer, John Archibald Wheeler, Lawrence Livermore National Laboratory, Lepton, List of particles, Mass-to-charge ratio, MSNBC, NASA, National Geographic Society, National Institute of Standards and Technology, Neutrino, Nuclear medicine, One-electron universe, Oxford University Press, ..., Pair production, Particle accelerator, Paul Dirac, Photon, Physical Review, Positron annihilation spectroscopy, Positron emission, Positron emission tomography, Positronic brain, Positronium, Potassium-40, Primordial nuclide, Proton, Radioactive decay, Radionuclide, Reviews of Modern Physics, Richard Feynman, Special relativity, Speed of light, Spin (physics), St. Olaf College, STS-91, Thunderstorm, Van Allen radiation belt, Weak interaction, World line, Yoichiro Nambu, Zeeman effect. Expand index (28 more) »

Alpha Magnetic Spectrometer

The Alpha Magnetic Spectrometer, also designated AMS-02, is a particle physics experiment module that is mounted on the International Space Station.

New!!: Positron and Alpha Magnetic Spectrometer · See more »

American Astronomical Society

The American Astronomical Society (AAS, sometimes spoken as "double-A-S") is an American society of professional astronomers and other interested individuals, headquartered in Washington, DC.

New!!: Positron and American Astronomical Society · See more »


Annihilation is defined as "total destruction" or "complete obliteration" of an object; having its root in the Latin nihil (nothing).

New!!: Positron and Annihilation · See more »


In particle physics, antimatter is material composed of antiparticles, which have the same mass as particles of ordinary matter but opposite charges, as well as other particle properties such as lepton and baryon numbers and quantum spin.

New!!: Positron and Antimatter · See more »


Corresponding to most kinds of particles, there is an associated antimatter antiparticle with the same mass and opposite charge (including electric charge).

New!!: Positron and Antiparticle · See more »

Atomic mass unit

The unified atomic mass unit (symbol: u) or dalton (symbol: Da) is the standard unit that is used for indicating mass on an atomic or molecular scale (atomic mass).

New!!: Positron and Atomic mass unit · See more »

Baryon asymmetry

The baryon asymmetry problem in physics refers to the fact that there is an imbalance in baryonic matter and antibaryonic matter in the observable universe.

New!!: Positron and Baryon asymmetry · See more »


The becquerel (symbol Bq) (pronounced) is the SI derived unit of radioactivity.

New!!: Positron and Becquerel · See more »

Beta decay

In nuclear physics, beta decay (β-decay) is a type of radioactive decay in which a proton is transformed into a neutron, or vice versa, inside an atomic nucleus.

New!!: Positron and Beta decay · See more »

Beta particle

Beta particles are high-energy, high-speed electrons or positrons emitted by certain types of radioactive nuclei, such as potassium-40.

New!!: Positron and Beta particle · See more »

California Institute of Technology

The California Institute of Technology or CaltechThe university itself only spells its short form as "Caltech"; other spellings such as.

New!!: Positron and California Institute of Technology · See more »

Carl David Anderson

Carl David Anderson (September 3, 1905 – January 11, 1991) was an American physicist.

New!!: Positron and Carl David Anderson · See more »

Chung-Yao Chao

Chung-Yao Chao (27 June 1902 – 28 May 1998) was a Chinese physicist.

New!!: Positron and Chung-Yao Chao · See more »

Cloud chamber

The cloud chamber, also known as the Wilson chamber, is a particle detector used for detecting ionizing radiation.

New!!: Positron and Cloud chamber · See more »

Cosmic ray

Cosmic rays are immensely high-energy radiation, mainly originating outside the Solar System.

New!!: Positron and Cosmic ray · See more »

Cosmos (magazine)

COSMOS is a science magazine produced in Australia with a global outlook and literary ambitions.

New!!: Positron and Cosmos (magazine) · See more »

CP violation

In particle physics, CP violation (CP standing for charge parity) is a violation of the postulated CP-symmetry (or charge conjugation parity symmetry): the combination of C-symmetry (charge conjugation symmetry) and P-symmetry (parity symmetry).

New!!: Positron and CP violation · See more »

Dark matter

Dark matter is a hypothetical kind of matter that cannot be seen with telescopes but would account for most of the matter in the universe.

New!!: Positron and Dark matter · See more »

Dirac equation

In particle physics, the Dirac equation is a relativistic wave equation derived by British physicist Paul Dirac in 1928.

New!!: Positron and Dirac equation · See more »

Dirac sea

The Dirac sea is a theoretical model of the vacuum as an infinite sea of particles with negative energy.

New!!: Positron and Dirac sea · See more »

Dmitri Skobeltsyn

Dmitri Vladimirovich Skobeltsyn (Дмитрий Владимирович Скобельцын) (born November 24, 1892, Saint Petersburg – November 16, 1990) was a Soviet physicist, academician of the Soviet Academy of Sciences (1946), Hero of Socialist Labor (1969).

New!!: Positron and Dmitri Skobeltsyn · See more »

Electric charge

Electric charge is the physical property of matter that causes it to experience a force when placed in an electromagnetic field.

New!!: Positron and Electric charge · See more »


Electromagnetism is a branch of physics which involves the study of the electromagnetic force, a type of physical interaction that occurs between electrically charged particles.

New!!: Positron and Electromagnetism · See more »


The electron is a subatomic particle, symbol or, with a negative elementary electric charge.

New!!: Positron and Electron · See more »

Electron–positron annihilation

Electron–positron annihilation occurs when an electron and a positron (the electron's antiparticle) collide.

New!!: Positron and Electron–positron annihilation · See more »


In physics, the electronvolt (symbol eV; also written electron volt) is a unit of energy equal to approximately 160 zeptojoules (symbol zJ) or joules (symbol J).

New!!: Positron and Electronvolt · See more »

Elementary charge

The elementary charge, usually denoted as or sometimes, is the electric charge carried by a single proton, or equivalently, the negation (opposite) of the electric charge carried by a single electron.

New!!: Positron and Elementary charge · See more »

Elementary particle

In particle physics, an elementary particle or fundamental particle is a particle whose substructure is unknown, thus it is unknown whether it is composed of other particles.

New!!: Positron and Elementary particle · See more »

Ernst Stueckelberg

Ernst Carl Gerlach Stueckelberg (February 1, 1905 – September 4, 1984) was a Swiss mathematician and physicist, regarded as one of the most eminent physicists of the 20th century.

New!!: Positron and Ernst Stueckelberg · See more »


In particle physics, a fermion (a name coined by Paul Dirac from the surname of Enrico Fermi) is any particle characterized by Fermi–Dirac statistics.

New!!: Positron and Fermion · See more »


In the various subfields of physics, there exist two common usages of the term flux, each with rigorous mathematical frameworks.

New!!: Positron and Flux · See more »

Frédéric Joliot-Curie

Jean Frédéric Joliot-Curie (19 March 1900 – 14 August 1958), born Jean Frédéric Joliot, was a French physicist, husband of Irène Joliot-Curie and Nobel laureate.

New!!: Positron and Frédéric Joliot-Curie · See more »

Gamma ray

Gamma radiation, also known as gamma rays, and denoted by the Greek letter γ, refers to electromagnetic radiation of an extremely high frequency and therefore consists of high-energy photons.

New!!: Positron and Gamma ray · See more »


Gravity or gravitation is a natural phenomenon by which all things with mass are brought towards (or 'gravitate' towards) one another including stars, planets, galaxies and even light and sub-atomic particles.

New!!: Positron and Gravity · See more »

International Space Station

The International Space Station (ISS) is a space station, or a habitable artificial satellite, in low Earth orbit.

New!!: Positron and International Space Station · See more »

Irène Joliot-Curie

Irène Joliot-Curie (12 September 1897 – 17 March 1956) was a French scientist, the daughter of Marie Skłodowska-Curie and Pierre Curie and the wife of Frédéric Joliot-Curie.

New!!: Positron and Irène Joliot-Curie · See more »

J. Robert Oppenheimer

Julius Robert Oppenheimer (April 22, 1904 – February 18, 1967) was an American theoretical physicist and professor of physics at the University of California, Berkeley.

New!!: Positron and J. Robert Oppenheimer · See more »

John Archibald Wheeler

John Archibald Wheeler (July 9, 1911 – April 13, 2008) was an American theoretical physicist.

New!!: Positron and John Archibald Wheeler · See more »

Lawrence Livermore National Laboratory

Lawrence Livermore National Laboratory (LLNL) is a federal research facility in Livermore, California, founded by the University of California in 1952.

New!!: Positron and Lawrence Livermore National Laboratory · See more »


A lepton is an elementary, half-integer spin (spin) particle that does not undergo strong interactions, but is subject to the Pauli exclusion principle.

New!!: Positron and Lepton · See more »

List of particles

This is a list of the different types of particles found or believed to exist in the whole of the universe.

New!!: Positron and List of particles · See more »

Mass-to-charge ratio

The mass-to-charge ratio (m/Q) is a physical quantity that is most widely used in the electrodynamics of charged particles, e.g. in electron optics and ion optics.

New!!: Positron and Mass-to-charge ratio · See more »


MSNBC is an American basic cable and satellite television network that provides news coverage and political opinion on current events.

New!!: Positron and MSNBC · See more »


The National Aeronautics and Space Administration (NASA) is the United States government agency responsible for the civilian space program as well as aeronautics and aerospace research.

New!!: Positron and NASA · See more »

National Geographic Society

The National Geographic Society (NGS), headquartered in Washington, D.C. in the United States of America, is one of the largest nonprofit scientific and educational institutions in the world.

New!!: Positron and National Geographic Society · See more »

National Institute of Standards and Technology

The National Institute of Standards and Technology (NIST), known between 1901 and 1988 as the National Bureau of Standards (NBS), is a measurement standards laboratory, also known as a National Metrological Institute (NMI), which is a non-regulatory agency of the United States Department of Commerce.

New!!: Positron and National Institute of Standards and Technology · See more »


A neutrino (or, in Italian) is an electrically neutral elementary particle with half-integer spin.

New!!: Positron and Neutrino · See more »

Nuclear medicine

Nuclear medicine is a medical specialty involving the application of radioactive substances in the diagnosis and treatment of disease.

New!!: Positron and Nuclear medicine · See more »

One-electron universe

The one-electron universe postulate, proposed by John Wheeler in a telephone call to Richard Feynman in the spring of 1940, states that all electrons and positrons are actually manifestations of a single entity moving backwards and forwards in time.

New!!: Positron and One-electron universe · See more »

Oxford University Press

Oxford University Press (OUP) is the largest university press in the world, and the second-oldest, after Cambridge University Press.

New!!: Positron and Oxford University Press · See more »

Pair production

Pair production is the creation of an elementary particle and its antiparticle, for example creating an electron and positron, a muon and antimuon, or a proton and antiproton.

New!!: Positron and Pair production · See more »

Particle accelerator

A particle accelerator is a device that uses electromagnetic fields to propel charged particles to high speeds and to contain them in well-defined beams.

New!!: Positron and Particle accelerator · See more »

Paul Dirac

Paul Adrien Maurice Dirac (8 August 1902 – 20 October 1984) was an English theoretical physicist who made fundamental contributions to the early development of both quantum mechanics and quantum electrodynamics.

New!!: Positron and Paul Dirac · See more »


No description.

New!!: Positron and Photon · See more »

Physical Review

Physical Review is an American peer-reviewed scientific journal established in 1893 by Edward Nichols.

New!!: Positron and Physical Review · See more »

Positron annihilation spectroscopy

Positron annihilation spectroscopy (PAS) or sometimes specifically referred to as Positron annihilation lifetime spectroscopy (PALS) is a non-destructive spectroscopy technique to study voids and defects in solids.

New!!: Positron and Positron annihilation spectroscopy · See more »

Positron emission

Positron emission or beta plus decay (β+ decay) is a particular type of radioactive decay and a subtype of beta decay, in which a proton inside a radionuclide nucleus is converted into a neutron while releasing a positron and an electron neutrino (νe).

New!!: Positron and Positron emission · See more »

Positron emission tomography

Positron emission tomography (PET) is a nuclear medicine, functional imaging technique that produces a three-dimensional image of functional processes in the body.

New!!: Positron and Positron emission tomography · See more »

Positronic brain

A positronic brain is a fictional technological device, originally conceived by science fiction writer Isaac Asimov (1920–1992).

New!!: Positron and Positronic brain · See more »


Positronium (Ps) is a system consisting of an electron and its anti-particle, a positron, bound together into an exotic atom, specifically an onium.

New!!: Positron and Positronium · See more »


Potassium-40 (40K) is a radioactive isotope of potassium which has a very long half-life of 1.251 years.

New!!: Positron and Potassium-40 · See more »

Primordial nuclide

In geochemistry and geonuclear physics, primordial nuclides, also known as primordial isotopes, are nuclides found on the Earth that have existed in their current form since before Earth was formed.

New!!: Positron and Primordial nuclide · See more »


| magnetic_moment.

New!!: Positron and Proton · See more »

Radioactive decay

Radioactive decay, also known as nuclear decay or radioactivity, is the process by which a nucleus of an unstable atom loses energy by emitting radiation.

New!!: Positron and Radioactive decay · See more »


A radionuclide (radioactive nuclide, radioisotope or radioactive isotope) is an atom that has excess nuclear energy, making it unstable.

New!!: Positron and Radionuclide · See more »

Reviews of Modern Physics

Reviews of Modern Physics is a quarterly peer-reviewed scientific journal published by the American Physical Society.

New!!: Positron and Reviews of Modern Physics · See more »

Richard Feynman

Richard Phillips Feynman, (May 11, 1918 – February 15, 1988) was an American theoretical physicist known for his work in the path integral formulation of quantum mechanics, the theory of quantum electrodynamics, and the physics of the superfluidity of supercooled liquid helium, as well as in particle physics for which he proposed the parton model.

New!!: Positron and Richard Feynman · See more »

Special relativity

In physics, special relativity (SR, also known as the special theory of relativity or STR) is the generally accepted physical theory regarding the relationship between space and time.

New!!: Positron and Special relativity · See more »

Speed of light

The speed of light in vacuum, commonly denoted, is a universal physical constant important in many areas of physics.

New!!: Positron and Speed of light · See more »

Spin (physics)

In quantum mechanics and particle physics, spin is an intrinsic form of angular momentum carried by elementary particles, composite particles (hadrons), and atomic nuclei.

New!!: Positron and Spin (physics) · See more »

St. Olaf College


New!!: Positron and St. Olaf College · See more »


STS-91 was the final Space Shuttle mission to the Mir space station.

New!!: Positron and STS-91 · See more »


A thunderstorm, also known as an electrical storm, a lightning storm, or a thundershower, is a type of storm characterized by the presence of lightning and its acoustic effect on the Earth's atmosphere known as thunder.

New!!: Positron and Thunderstorm · See more »

Van Allen radiation belt

A radiation belt is a layer of energetic charged particles that is held in place around a magnetized planet, such as the Earth, by the planet's magnetic field.

New!!: Positron and Van Allen radiation belt · See more »

Weak interaction

In particle physics, the weak interaction is the mechanism responsible for the weak force or weak nuclear force, one of the four known fundamental interactions of nature, alongside the strong interaction, electromagnetism, and gravitation.

New!!: Positron and Weak interaction · See more »

World line

In physics, the world line of an object is the path of that object in 4-dimensional spacetime, tracing the history of its location in space at each instant in time.

New!!: Positron and World line · See more »

Yoichiro Nambu

was a Japanese-born American physicist, a professor at the University of Chicago.

New!!: Positron and Yoichiro Nambu · See more »

Zeeman effect

The Zeeman effect, named after the Dutch physicist Pieter Zeeman, is the effect of splitting a spectral line into several components in the presence of a static magnetic field.

New!!: Positron and Zeeman effect · See more »

Redirects here:

Antielectron, Beta plus particle, Positive electron, Positrons.


[1] https://en.wikipedia.org/wiki/Positron

Hey! We are on Facebook now! »