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Radioactive decay (9803 bytes)
1: ...i]] ([[nuclide]]s) emit [[subatomic particle]]s. Decay is said to occur in the ''parent nucleus'' and pr... 3: ...|150px|The ''trefoil'' symbol is used to indicate radioactive material. The [[Unicode]] encoding of this symbo... 5: ... of one Bq. Since any reasonably-sized sample of radioactive material contains very many atoms, a becquerel is... 12: Such a collapse (a ''decay event'') requires a certain [[activation energy]]... 14: ...ide particles. However, these are not considered decay.) Radioactive decay path (646 bytes) 1: ...not atomic particles leave. Each particle in the decay path will have its own characteristic [[half-life... 3: Some radioactive substances have mroe than one decay path. 5: == List of decay paths == Radioactive waste (11487 bytes) 2: ...ctive waste''' is [[waste]] material containing [[radioactive]] [[chemical element]]s which does not have a pra... 4: ...dioactivity. Eventually all waste decays into non-radioactive elements. 6: ...active [[decay product]] leading to [[decay chain|decay chains]]. 8: The main objective in managing and disposing of radioactive (or other) waste is to protect people and the env... 10: == Types of radioactive waste == Radioactive Man (2693 bytes) 1: '''Radioactive Man''', within the world of the [[animated]] [[te... 3: ... was said to be 73 years old in [[1995]]), played Radioactive Man and Buddy Hodges played Fallout Boy. Dirk Ric... 7: ...ast from local children. [[Bart Simpson]], a huge Radioactive Man fan, tried out for the part in the film, but ... 9: Radioactive Man has escaped from the fictional world of Bart ... 11: ...books, and the reader can follow the evolution of Radioactive Man from a [[1950s]] irradiated hero through the ... Radioactive tracer (307 bytes) 1: ...Radioactive tracer''' is a substance containing a radioactive [[isotope]] ([[radioisotope]]). Radioactive contamination (6466 bytes) 2: ...>uncontrolled</i> distribution of [[radioactivity|radioactive material]] in a given environment. 4: ...ere an atom of a given element will [[radioactive decay|transform]] into a different element, emitting [[... 6: ...tions. [[Nuclear fallout]] is the distribution of radioactive contamination by a [[nuclear explosion]]. 8: ...terial from radioactive contamination. Therefore, radioactive material in sealed and designated waste container... 12: Radioactive contamination may exist on surfaces or in volumes... Radioactive cloud (1420 bytes) 7: ...ud of heavier radiation. One of the problems with radioactive clouds is their ability to shift with wind patter... Self Decay (792 bytes) Decay chain (1623 bytes) 1: ...to a stable state, but rather undergo a series of decays until eventually a stable [[isotope]] is reached... 3: ...e [[radon]] it generates as the next stage in the decay chain. 5: ...es into four classes. The members of any possible decay chain must be drawn entirely from one of these cl... 7: Three main decay chains are observed in nature, commonly called th... Decay theory (564 bytes) 1: The ''' Decay theory ''' states that when something new is [[le... 3: Decay theory suggests that the passage of [[time]] alwa... 5: The decay theory along with the [[interference theory]] are... Proton decay (2730 bytes) 1: ... law of conservation of the baryon number, proton decay is actually the inevitable mechanism for bringing... 5: ...positron]] and a [[pion]] that itself immediately decays into [[photon]]s in the range of [[gamma radiati... 11: ...that period refer to this figure for the possible decay time for baryonic matter. 13: ...neutrino oscillation]]s also point towards proton decay being a real effect. 15: Although the phenomenon is referred to as "proton decay", the effect would also be seen in [[neutron]]s b... Beta decay (2382 bytes) 3: ...'''neutron decay''') is a type of [[radioactive]] decay in which a [[beta particle]] (an [[electron]] or ... 5: In β<sup>−</sup> decay, the [[weak nuclear force]] converts a [[neutron]... 8: In β<sup>+</sup> decay, a proton is converted into a neutron, a [[positr... 11: ... neutron are part of an [[atomic nucleus]], these decay processes [[transmutation|transmute]] one chemica... 16: ...rino]]. The energies of electrons emitted by beta decay were observed to be non-discrete (some being more... Alpha decay (1325 bytes) 3: ...cay''' is a form of [[radioactivity|radioactive]] decay in which an [[atomic nucleus]] ejects an [[alpha ... 13: ...ances when [[beta decay]] occurs along with alpha decay, atomic [[helium]] is formed. Orbital decay (595 bytes) 1: '''Orbital decay''' is the reduction in the height of an object's ... Divine Decay (691 bytes) 1: '''Divine Decay''' are a [[thrash metal]] band from [[Helsinki]],... 23: * [http://www.divinedecay.com Offical website] Weak decay (189 bytes) 1: In [[physics]], '''weak decay''' is the process of decomposing a larger particl... Decay product (1767 bytes) 1: ...is a [[nuclide]] resulting from the [[radioactive decay]] of a parent or precursor nuclide. 3: ...tanding radioactive decay and the management of [[radioactive waste]]. 5: ...lead. Lead is generally the stable point at which decay chains stop. 7: ...lightly radioactive when new, but become far more radioactive after only a few months of storage. 9: ...tance are extremely predictable. Because of this, decay products are important to scientists in many fiel... Decay energy (748 bytes) 1: ...cay energy''' is the energy released by a nuclear decay. 7: Types of decay energy include 9: * [[beta decay]] 10: * [[alpha decay]] 12: ...tp://www.science.uwaterloo.ca/~cchieh/cact/nuctek/decayenergy.html] Decay mode (1090 bytes) 2: ...cay mode''' describes a particular way a particle decays. 4: ...dioactive decay]] (the decay of [[nuclides]]) the decay modes are: 5: * [[alpha decay]] (emission of a Helium-4 nucleus). 6: * [[beta decay|β<sup>−</sup> decay]] (emission of an electron) 7: * [[beta decay|β<sup>+</sup> decay]] (emission of a positron) State of Decay (1448 bytes) 2: '''''State of Decay''''' (1980) is a four-part serial in the [[scienc... 8: ...al was novelised as ''Doctor Who and the State of Decay'' by Terrance Dicks in 1981. 11: .../www.bbc.co.uk/cult/doctorwho/episodeguide/stateofdecay/castcrew.shtml Cast and Crew list, on the BBC web...
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