/an"tee proh'ton, an"tuy-/, n. Physics.
an elementary particle having negative charge equal in magnitude to that of the electron and having the same mass and spin as a proton; the antiparticle of the proton.
[1935-40; ANTI- + PROTON]

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      subatomic particle of the same mass as a proton but having a negative electric charge and oppositely directed magnetic moment. It is the proton's antiparticle. Antiprotons were first produced and identified in 1955 by Emilio Segrè (Segrè, Emilio), Owen Chamberlain (Chamberlain, Owen) (for which they received the Nobel Prize for Physics in 1959), and coworkers by bombarding a copper target with high-energy protons from the proton synchrotron at the University of California at Berkeley. Antiprotons were predicted in the early 1930s, but their discovery had to wait for the technology of high-energy particle accelerators to reach the 6 billion electron-volt range. A collision of an antiproton with a proton results in mutual annihilation, but a near miss may produce by charge exchange an antineutron–neutron pair.

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Universalium. 2010.

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Look at other dictionaries:

  • Antiproton — (p ) Klassifikation Fermion Hadron Baryon Nukleon Eigenschaften Ladung −1 e 1,602176462 · 10 19 C …   Deutsch Wikipedia

  • antiproton — ANTIPROTÓN, antiprotoni, s.m. (fiz.) Antiparticulă a protonului. – Din fr. antiproton. Trimis de ana zecheru, 13.09.2007. Sursa: DEX 98  antiprotón s. m. → proton Trimis de siveco, 13.09.2007. Sursa: Dicţionar ortografic  ANTIPROTÓN antiprotoni …   Dicționar Român

  • antiproton — [ ɑ̃tiprɔtɔ̃ ] n. m. • 1956; de 1. anti et proton ♦ Phys. Antiparticule du proton. ● antiproton nom masculin Antiparticule du proton. antiproton n. m. PHYS NUCL Antiparticule du proton. V. antimatière …   Encyclopédie Universelle

  • antipróton — s. m. Antipartícula próton, mas com carga elétrica negativa. • [Brasil] Plural: antiprótones ou antiprótons.   ♦ Grafia em Portugal: antiprotão …   Dicionário da Língua Portuguesa

  • antiproton — antipròtōn m <G antiprotóna> DEFINICIJA fiz. antičestica protonu od kojega se razlikuje suprotnim predznakom naboja ETIMOLOGIJA anti + v. proton …   Hrvatski jezični portal

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  • antiproton — [an΄tī prō′tän΄; an΄tēprō′tän΄, an΄tiprō′tän΄] n. the antiparticle of the proton, with the same mass as the proton but a negative charge …   English World dictionary

  • Antiproton — Negaton redirects here. For the negatively charged particle in an atom that was once called a negaton, see Electron. Antiproton The quark structure of the antiproton. Classification Antibaryon Composition …   Wikipedia

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  • antiproton — antiprotonas statusas T sritis fizika atitikmenys: angl. antiproton vok. Antiproton, n rus. антипротон, m pranc. antiproton, m …   Fizikos terminų žodynas

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