neutron

neutron
An electrically neutral particle in the nuclei of all atoms (except hydrogen-1) with a mass slightly larger than that of a proton; in isolation, it has a half-life of about 10.3 minutes. [L. neuter, neither]
- epithermal n. a n. having an energy in the range immediately above the thermal range, i.e., having an energy between a few hundredths and approximately 100 ev.

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neu·tron 'n(y)ü-.trän n an uncharged elementary particle that has a mass nearly equal to that of the proton and is present in all known atomic nuclei except the hydrogen nucleus

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neu·tron (nooґtron) [neutr- + -on] an electrically neutral or uncharged particle of matter existing along with protons in the atoms of all elements except the mass 1 isotope of hydrogen. Symbol n.

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  • NEUTRON — En 1932, James Chadwick montra que le rayonnement émis par des atomes de béryllium bombardés par des particules 見 est constitué d’objets qui sont dépourvus de charge électrique et dont leur masse est proche de celle du proton. Ces objets furent… …   Encyclopédie Universelle

  • Neutron — Représentation schématique de la composition en quarks d un neutron, avec deux quarks d et un quark u. L interaction forte est transmise par des gluons (représentés ici par un tracé sinusoïdal). La couleur des quarks fait référence aux trois… …   Wikipédia en Français

  • Neutron — (n) Klassifikation Fermion Hadron Baryon Nukleon Eigenschaften Ladung neutral Masse …   Deutsch Wikipedia

  • Neutrón — Grupo Hadrón Interacción Gravedad, Débil, Nuclear fuerte …   Wikipedia Español

  • neutron — NEUTRÓN, neutroni, s.m. (fiz.) Particulă elementară neutră din nucleul atomului lipsită de sarcină electrică, cu masa puţin mai mare decât cea a protonului. [pr.: ne u ] – Din fr. neutron. Trimis de GabiAlex, 15.06.2004. Sursa: DEX 98  neutrón s …   Dicționar Român

  • Neutron — Sn Elementarteilchen ohne elektrische Ladung per. Wortschatz fach. (20. Jh.) Neoklassische Bildung. Von dem englischen Physiker Chadwick gebildet aus l. neutrum keines von beiden und dem Wortausgang von Elektron1.    Ebenso nndl. neutron, ne.… …   Etymologisches Wörterbuch der deutschen sprache

  • neutrón — (De neutro y ón2). m. Fís. Partícula masiva sin carga eléctrica. Neutrones y protones forman los núcleos atómicos. neutrón lento. m. neutrón con velocidad del mismo orden que la agitación molecular a temperatura normal. neutrón rápido. m. El de… …   Diccionario de la lengua española

  • neutron — (n.) electrically neuter particle of the atom, 1921, coined by U.S. chemist William D. Harkins (1873 1951) from NEUTRAL (Cf. neutral) (adj.) + ON (Cf. on). First record of neutron bomb is from 1960. Neutron star attested from 1934, originally… …   Etymology dictionary

  • neutron — neùtrōn m <G neutróna> DEFINICIJA fiz. elementarna čestica, barion, bez električnog naboja i spina 1/2 (fermion), mase približno jednake protonu, sastavni dio atomske jezgre SINTAGMA slobodni neutron neutron koji se nalazi izvan jezgre,… …   Hrvatski jezični portal

  • neutron — néutron, néutroun m. neutron …   Diccionari Personau e Evolutiu

  • neutron — [no͞o′trän΄, nyo͞o′trän] n. [ NEUTR(AL) + ON] Particle Physics an uncharged nucleon having a mass of c. 1.675×10 27 kg ( c. 939.5729 MeV/c2, c. 1,839 times the mass of an electron): a free neutron, as in nuclear fission, has a half life of c.… …   English World dictionary

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