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[[File:Glossary Icon-2.png|100px|frameless|right|link=ICRP Glossary]]
In the context of exposure to Radon and Radon progeny, the historical unit for potential alpha energy concentration, defined as any combination of the short-lived progeny of <sup>222</sup>Rn or <sup>220</sup>Rn in air that will result in the emission of exactly 1.30 × 108 MeV m<sup>–3</sup> of potential alpha energy, which is approximately equal to 2.08 × 10<sup>–5</sup> J m<sup>–3</sup>.
(Adapted from [[ICRP Publication 126]], 2014)
'''Return to [[ICRP Glossary|Glossary]]'''
== Previous glossary entries ==
=== from [[ICRP Publication 126]], 2014 ===
The historical unit for potential alpha energy concentration defined as any combination of the short-lived progeny of radon in 1 m<sup>3</sup> of air that will result in the emission of 1.30 × 10<sup>8</sup> MeV m<sup>-3</sup> of potential alpha energy which is approximately equal to 2.08 × 10<sup>-5</sup> J m<sup>-3</sup>.
=== from [[ICRP Publication 115]], 2010 ===
Any combination of the short-lived progeny of radon in one litre of air that will result in the emission of 1.3 × 10<sup>^5</sup> MeV of potential alpha energy. 1 WL = 2.08 × 10<sup>^-5</sup> J/m<sup>3</sup>
In the context of exposure to Radon and Radon progeny, the historical unit for potential alpha energy concentration, defined as any combination of the short-lived progeny of <sup>222</sup>Rn or <sup>220</sup>Rn in air that will result in the emission of exactly 1.30 × 108 MeV m<sup>–3</sup> of potential alpha energy, which is approximately equal to 2.08 × 10<sup>–5</sup> J m<sup>–3</sup>.
(Adapted from [[ICRP Publication 126]], 2014)
'''Return to [[ICRP Glossary|Glossary]]'''
== Previous glossary entries ==
=== from [[ICRP Publication 126]], 2014 ===
The historical unit for potential alpha energy concentration defined as any combination of the short-lived progeny of radon in 1 m<sup>3</sup> of air that will result in the emission of 1.30 × 10<sup>8</sup> MeV m<sup>-3</sup> of potential alpha energy which is approximately equal to 2.08 × 10<sup>-5</sup> J m<sup>-3</sup>.
=== from [[ICRP Publication 115]], 2010 ===
Any combination of the short-lived progeny of radon in one litre of air that will result in the emission of 1.3 × 10<sup>^5</sup> MeV of potential alpha energy. 1 WL = 2.08 × 10<sup>^-5</sup> J/m<sup>3</sup>