Individual:
http://rdf.iit.demokritos.gr/2014/iaeaSafetyGlossary/id303
Annotations (3)
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nreo:canonicalLabel "half-life" (en)
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nreo:obviousAbbreviation "T½" ()
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skos:definition "1. For a radionuclide, the time required for the 'activity' to decrease, by a <br/>
'radioactive' decay 'process', by half.<br/>
Where it is necessary to distinguish this from other 'half-lives' (see (2)), the <br/>term 'radioactive half-life' should be used.<br/>The 'half-life' is related to the 'decay constant, 'λ, by the expression:<br/>
2<br/>
'T'<br/>
= ln<br/>
1/ 2<br/>
'l'<br/>
2. The time taken for the quantity of a specified material (e.g. a <br/>
radionuclide) in a specified place to decrease by half as a result of any specified <br/>'process' or 'processes' that follow similar exponential patterns to 'radioactive' decay.<br/>
<i><b>biological half-life.</b></i> The time taken for the quantity of a material in a <br/>specified tissue, organ or region of the body (or any other specified biota) <br/>to halve as a result of biological 'processes'.<br/>
<i><b>effective half-life, T .</b></i> The time taken for the 'activity' of a radionuclide in <br/>" (en)
Types (1)
Usage (6)