beta rays
Electron E*lec"tron, n. [NL., fr. Gr. 'h`lektron. See {Electric}.] 1. Amber; also, the alloy of gold and silver, called {electrum}. [archaic] [1913 Webster]

2. (Physics & Chem.) one of the fundamental subatomic particles, having a negative charge and about one thousandth the mass of a hydrogen atom. The electron carries (or is) a natural unit of negative electricity, equal to 3.4 x 10^{-10} electrostatic units, and is classed by physicists as a {lepton}. Its mass is practically constant at the lesser speeds, but increases due to relativistic effects as the velocity approaches that of light. Electrons are all of one kind, so far as is known. Thus far, no structure has been detected within an electron, and it is probably one of the ultimate composite constituents of all matter. An atom or group of atoms from which an electron has been detached has a positive charge and is called a {cation}. Electrons are projected from the cathode of vacuum tubes (including television picture tubes) as {cathode rays} and from radioactive substances as the {beta rays}. Previously also referred to as {corpuscle}, an obsolete term. The motion of electrons through metallic conductors is observed as an electric current. A particle identical to the electron in mass and most other respects, but having a positive instead of a negative charge, is called a {positron}, or {antielectron} [Webster 1913 Suppl. +PJC]


The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • beta rays — plural noun Streams of beta particles or electrons or positrons, given off by some radioactive substances • • • Main Entry: ↑beta * * * beta rays or beta radiation, a stream of beta particles …   Useful english dictionary

  • beta rays — beta spinduliuotė statusas T sritis fizika atitikmenys: angl. beta radiation; beta rays; beta particle radiation vok. Beta Strahlen, m; Beta Strahlung, f rus. бета излучение, n; бета лучи, m pranc. radiation bêta, f; rayonnement bêta, m; rayons… …   Fizikos terminų žodynas

  • Beta rays — Be ta rays (Physics) a form of ionizing radiation emitted by radioactive substances (such as radium), more penetrating than alpha rays, and consisting of negatively charged electrons. The electrons are the same kind of particle as those of… …   The Collaborative International Dictionary of English

  • beta rays — beta spinduliai statusas T sritis chemija apibrėžtis Labai siauras beta dalelių pluoštas. atitikmenys: angl. beta rays rus. бета лучи …   Chemijos terminų aiškinamasis žodynas

  • beta rays — beta rays. См. бетa излучение. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • Beta particle — Beta particles are high energy, high speed electrons or positrons emitted by certain types of radioactive nuclei such as potassium 40. The beta particles emitted are a form of ionizing radiation also known as beta rays. The production of beta… …   Wikipedia

  • Beta-Strahlen — beta spinduliuotė statusas T sritis fizika atitikmenys: angl. beta radiation; beta rays; beta particle radiation vok. Beta Strahlen, m; Beta Strahlung, f rus. бета излучение, n; бета лучи, m pranc. radiation bêta, f; rayonnement bêta, m; rayons… …   Fizikos terminų žodynas

  • Beta-Strahlung — beta spinduliuotė statusas T sritis fizika atitikmenys: angl. beta radiation; beta rays; beta particle radiation vok. Beta Strahlen, m; Beta Strahlung, f rus. бета излучение, n; бета лучи, m pranc. radiation bêta, f; rayonnement bêta, m; rayons… …   Fizikos terminų žodynas

  • beta radiation — beta spinduliuotė statusas T sritis fizika atitikmenys: angl. beta radiation; beta rays; beta particle radiation vok. Beta Strahlen, m; Beta Strahlung, f rus. бета излучение, n; бета лучи, m pranc. radiation bêta, f; rayonnement bêta, m; rayons… …   Fizikos terminų žodynas

  • beta spinduliuotė — statusas T sritis fizika atitikmenys: angl. beta radiation; beta rays; beta particle radiation vok. Beta Strahlen, m; Beta Strahlung, f rus. бета излучение, n; бета лучи, m pranc. radiation bêta, f; rayonnement bêta, m; rayons bêta, m …   Fizikos terminų žodynas

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