Aluminium-26

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Aluminium-26 (26Al, Al-26) is a radioactive isotope of aluminium. It decays by either positron emission or electron capture to magnesium-26. The half-life of 26Al is 7.17×105 years. A small amount of aluminium-26 is made when atoms hit cosmic ray protons.[1]

When aluminium-26 decays it also produces gamma rays and x-rays. Because it is radioactive, it is usually kept behind at least 5 centimetres (2 in) of lead. We use special tools to transfer, use, and store aluminium-26.[2]

References[change | change source]

  1. Overholt, Andrew C.; Melott, Adrian L. (2013). "Cosmogenic nuclide enhancement via deposition from long-period comets as a test of the Younger Dryas impact hypothesis". Earth and Planetary Science Letters. 377–378: 55–61. arXiv:1307.6557. Bibcode:2013E&PSL.377...55O. doi:10.1016/j.epsl.2013.07.029. S2CID 119291750.
  2. Nuclide Safety Data Sheet Aluminum-26 (PDF). National Health& Physics Society.