Back Aluminium-26 Afrikaans Hliník-26 Czech Aluminium 26 French 알루미늄-26 Korean Aluminium-26 Dutch Алюминий-26 Russian Aluminium-26 SIMPLE Алюміній-26 Ukrainian
| General | |
|---|---|
| Symbol | 26Al |
| Names | aluminium-26, 26Al, Al-26 |
| Protons (Z) | 13 |
| Neutrons (N) | 13 |
| Nuclide data | |
| Natural abundance | trace (cosmogenic) |
| Half-life (t1/2) | 7.17×105 years |
| Spin | 5+ |
| Decay modes | |
| Decay mode | Decay energy (MeV) |
| β+ | 4.00414 |
| ε | 4.00414 |
| Isotopes of aluminium Complete table of nuclides | |
Aluminium-26 (26Al, Al-26) is a radioactive isotope of the chemical element aluminium, decaying by either positron emission or electron capture to stable magnesium-26. The half-life of 26Al is 717,000 years. This is far too short for the isotope to survive as a primordial nuclide, but a small amount of it is produced by collisions of atoms with cosmic ray protons.[1]
Decay of aluminium-26 also produces gamma rays and x-rays.[2] The x-rays and Auger electrons are emitted by the excited atomic shell of the daughter 26Mg after the electron capture which typically leaves a hole in one of the lower sub-shells.
Because it is radioactive, it is typically stored behind at least 5 centimetres (2 in) of lead. Contact with 26Al may result in radiological contamination. This necessitates special tools for transfer, use, and storage.[3]
- ^ Overholt, A.C.; Melott, A.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.
- ^ "Nuclide Safety Data Sheet Aluminum-26" (PDF). www.nchps.org.
- ^ "Nuclide Safety Data Sheet Aluminum-26" (PDF). National Health& Physics Society. Retrieved 2009-04-13.
© MMXXIII Rich X Search. We shall prevail. All rights reserved. Rich X Search