--- cited_by: [] definition: |- ALUMINUM-26, is a radioactive isotope of the chemical element aluminium, decaying by either of the modes beta-plus or electron capture, both resulting in the stable nuclide magnesium-26. The half-life of 26Al is 7.17×105years. This is far too short for the isotope to survive to the present, but a small amount of the nuclide is produced by collisions of argon atoms with cosmic ray protons. The analysis of AL26 is part of the process to determine exposure ages. href: https://data.globalchange.gov/gcmd_keyword/1efdd374-40a1-4118-a1da-61c647017ec9.yaml identifier: 1efdd374-40a1-4118-a1da-61c647017ec9 label: ALUMINUM-26 ANALYSIS parent_identifier: c9a5b3eb-7556-41a8-a2b8-c015db80e5b2 uri: /gcmd_keyword/1efdd374-40a1-4118-a1da-61c647017ec9