Printer Friendly
Dictionary, Encyclopedia and Thesaurus - The Free Dictionary
1,784,160,338 visitors served.
forum mailing list For webmasters
?
New: Language forums
Dictionary/
thesaurus
Medical
dictionary
Legal
dictionary
Financial
dictionary
Acronyms
 
Idioms
Encyclopedia
Wikipedia
encyclopedia
?

positron
(redirected from antiparticle)

    Also found in: Dictionary/thesaurus, Encyclopedia, Wikipedia, Hutchinson 0.01 sec.
positron /pos·i·tron/ (poz´ĭ-tron) the antiparticle of an electron; a positively charged electron.
pos·i·tron (pz-trn)
n.
A positively charged particle of the same mass and magnitude of charge as an electron. Also called antielectron, positive electron.
Positron
One of the small particles that make up an atom. A positron has the same mass and amount of charge as an electron, but the positron has a positive charge.
Mentioned in: Positron Emission Tomography (PET)
positron
[pos′itron]
a positively charged particle emitted from neutron-deficient radioactive nuclei; the antiparticle of an electron.
positron
the antiparticle of the electron. When a positron is emitted by a radionuclide it combines with an electron and both undergo annihilation, producing two 511 keV gamma rays traveling in opposite directions. This effect is used in positron emission tomography (PET).


How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content.
?Page tools
Printer friendly
Cite / link
Email
Feedback
Add definition
? Mentioned in ? References in periodicals archive
 
[When] protons and neutrons cease to exist, they may in turn decay into electrons and their antiparticle partners, positrons.
The cosmos as memento mori: the ultimate significance of modern ... by Christensen, Bryce / Modern Age
Researchers explain matter's dominance as a consequence of differences in the way a fundamental force of nature, called the weak force, affects subatomic particles and their antiparticles.
Antimatter loses again by Science News
When a particle and its antiparticle meet, they completely annihilate each other in a flash of pure energy.
Physicists Observe First Events At Asymmetric B Factory by Business Wire
More results
 
Medical browser? ? Full browser
 
 
Medical Dictionary
?

Disclaimer | Privacy policy | Feedback | Copyright © 2009 Farlex, Inc.
All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only. This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional. Terms of Use.