- positive beta particle
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English-Arabic Medical Dictionary. 2013.
positive beta particle
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beta particle — Physics. an electron or positron emitted from an atomic nucleus in a certain type of radioactive decay. [1900 05] * * * ▪ physics electron (unit negative charge) or positron (unit positive charge) spontaneously emitted by certain unstable… … Universalium
beta decay — n. radioactive disintegration of a nucleus with the accompanying emission of a beta particle: the residual nucleus has one more unit of positive charge after electron emission and one less after positron emission … English World dictionary
beta decay — Physics. a radioactive process in which a beta particle is emitted from the nucleus of an atom, raising the atomic number of the atom by one if the particle is negatively charged, lowering it by one if positively charged. [1930 35] * * * Any of… … Universalium
particle accelerator — accelerator (def. 7). [1945 50] * * * Device that accelerates a beam of fast moving, electrically charged atoms (ions) or subatomic particles. Accelerators are used to study the structure of atomic nuclei (see atom) and the nature of subatomic… … Universalium
Particle in a one-dimensional lattice — In quantum mechanics, the particle in a one dimensional lattice is a problem that occurs in the model of a periodic crystal lattice. The potential is caused by ions in the periodic structure of the crystal creating an electromagnetic field so… … Wikipedia
Particle beam weapon — A particle beam weapon uses an ultra high energy beam of atoms or electrons (i.e., a particle beam) to damage a material target by hitting it, and thus disrupting its atomic and molecular structure. A particle beam weapon is a type of directed… … Wikipedia
particle — 1. A very small piece or portion of anything. 2. An elementary p. such as a proton or electron. [L. particula, dim. of pars, part] alpha p. (α) a p. consisting of two neutrons and two protons, with a positive charge (2e+); emitted energetically… … Medical dictionary
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… … The Collaborative International Dictionary of English
Alpha particle — Alpha particles (named after and denoted by the first letter in the Greek alphabet, α) consist of two protons and two neutrons bound together into a particle identical to a helium nucleus; hence, it can be written as He2+ or 42He2+. They are a… … Wikipedia
subatomic particle — or elementary particle Any of various self contained units of matter or energy. Discovery of the electron in 1897 and of the atomic nucleus in 1911 established that the atom is actually a composite of a cloud of electrons surrounding a tiny but… … Universalium
Liver X receptor beta — Nuclear receptor subfamily 1, group H, member 2 PDB rendering based on 1p8d … Wikipedia
