Definition of Radioactive decay

Babylon English
radioactive decay
gradual reduction in the number of radioactive atoms in material

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Radioactive decay definition was found in categories: Government(1)  Language, Idioms & Slang(2)  Science & Technology(3)  Society & Culture(2)  Entertainment & Music(1)  Medicine(1)  Encyclopedia(1)  

Radioactive decay Definition from Government Dictionaries & Glossaries

DOD Dictionary of Military Terms
radioactive decay
(*) The decrease in the radiation intensity of any radioactive material with respect to time.
  


Radioactive decay Definition from Language, Idioms & Slang Dictionaries & Glossaries

WordNet 2.0
radioactive decay

Noun
1. the spontaneous disintegration of a radioactive substance along with the emission of ionizing radiation
(synonym) decay, disintegration
(hypernym) nuclear reaction
(hyponym) alpha decay

hEnglish - advanced version
radioactive decay

radioactive decay
n : the spontaneous disintegration of a radioactive substance along with the emission of ionizing radiation [syn: decay, disintegration]





Radioactive decay Definition from Science & Technology Dictionaries & Glossaries

NRC Nuclear Energy Glossary
Radioactive decay
Large unstable atoms can become more stable by emitting radiation. This process is called radioactive decay. This radiation can be emitted in the form of a positively charged alpha particle, a negatively charged beta particle, or gamma rays or x-rays.

Radioactive Decay of an Atom

ASTRONOMY UNBOUND
Radioactive decay

The spontaneous disintegration of certain atomic nuclei by emission of either 2 protons bound with 2 neutrons (a helium nucleus), known as alpha decay , or of an electron, known as beta decay . If the emitted beta particle is the antimatter positive electron the disintegration process is termed positron emission. Radioactive decay is sometimes accompanied by the emission of gamma rays and is always accompanied by the transmutation of the atomic nucleus into another element which is more stable. The rate of decay, known as the halflife , together with the energy of the emitted particle, is unique to the radionuclide (the species of unstable nucleus).

Physical Geography Terms and Meanings
Radioactive Decay
Natural decay of the nucleus of an atom where alpha or beta particle and/or gamma rays are released at a fixed rate.


Radioactive decay Definition from Society & Culture Dictionaries & Glossaries

EPA Terms of Environment
Radioactive Decay
Spontaneous change in an atom by emission of of charged particles and/or gamma rays; also known as radioactive disintegration and radioactivity.

Environmental Engineering (English ver.)
Radioactive Decay
Spontaneous change in an atom by emission of of charged particles and/or gamma rays; also known as radioactive disintegration and radioactivity.


Radioactive decay Definition from Entertainment & Music Dictionaries & Glossaries

English to Federation-Standard Golic Vulcan
Radioactive decay
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Radioactive decay Definition from Medicine Dictionaries & Glossaries

CDC Radiological Terms
Radioactive decay
the spontaneous disintegration of the nucleus of an atom.
  

Decay, radioactive
disintegration of the nucleus of an unstable atom by the release of radiation.
  


Radioactive decay Definition from Encyclopedia Dictionaries & Glossaries

Wikipedia English - The Free Encyclopedia
Radioactive decay
"Radioactive" and "Radioactivity" redirect here. For other uses see Radioactive (disambiguation).
For decay rate in a more general context see Particle decay.
Radioactive decay is the process in which an unstable  atomic nucleus  loses energy by emitting radiation in the form of particles or electromagnetic waves. This decay, or loss of energy, results in an atom of one type, called the parent nuclide transforming to an atom of a different type, called the daughter nuclide. For example: a carbon-14 atom (the "parent") emits radiation and transforms to a nitrogen-14 atom (the "daughter.") This is a random process on the atomic level, in that it is impossible to predict when a particular atom will decay, but given a large number of similar atoms, the decay rate, on average, is predictable.

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