Isotopes of oxygen

Isotopes of oxygen (8O)
Main isotopes Decay
abun­dance half-life (t1/2) mode pro­duct
15O trace 122.266 s β+100% 15N
16O 99.8% stable
17O 0.0380% stable
18O 0.205% stable
Standard atomic weight Ar°(O)

There are three known stable isotopes of oxygen (8O): 16
O
, 17
O
, and 18
O
.

Radioactive isotopes ranging from 11
O
to 28
O
have also been characterized, all short-lived. The longest-lived radioisotope is 15
O
with a half-life of 122.266(43) s, while the shortest-lived isotope is the unbound 11
O
with a half-life of 198(12) yoctoseconds, though half-lives have not been measured for the unbound heavy isotopes 27
O
and 28
O
.[3]

  1. ^ "Standard Atomic Weights: Oxygen". CIAAW. 2009.
  2. ^ Prohaska, Thomas; Irrgeher, Johanna; Benefield, Jacqueline; Böhlke, John K.; Chesson, Lesley A.; Coplen, Tyler B.; Ding, Tiping; Dunn, Philip J. H.; Gröning, Manfred; Holden, Norman E.; Meijer, Harro A. J. (2022-05-04). "Standard atomic weights of the elements 2021 (IUPAC Technical Report)". Pure and Applied Chemistry. doi:10.1515/pac-2019-0603. ISSN 1365-3075.
  3. ^ Kondo, Y.; Achouri, N. L.; Falou, H. Al; et al. (2023-08-30). "First observation of 28O". Nature. 620 (7976). Springer Science and Business Media LLC: 965–970. Bibcode:2023Natur.620..965K. doi:10.1038/s41586-023-06352-6. ISSN 0028-0836. PMC 10630140. PMID 37648757.