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Americium-243 is a radioactive isotope of americium having 95 electrons and protons and 148 neutrons and has a mass of 243.06138 g/mol. It has a half-life of 7370 years and is highly unstable, hence it is not found in nature. It either decays by spontaneous fission or by emitting an alpha particle (the decay energy is 5.44MeV) to turn into neptunium-239. Americium-243 is often found in household smoke detectors.

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This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Americium-243". A list of authors is available in Wikipedia.
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