Oxygen-22 is a radioisotope of the chemical element oxygen, which has 14 neutrons in its atomic nucleus in addition to the element-specific 8 protons; the sum of the number of these atomic nucleus building blocks results in a mass number of 22. The very short-lived, only artificially produced, unstable and thus radioactive nuclide has no practical significance; the study of 22O is exclusively for academic purposes.
According to a report from 1969, the first observation and identification of the unstable nuclide was achieved in an transfer reaction by irradiating metallic thorium-232 with oxygen-18 atoms accelerated to 122 MeV [1].
See also: list of Oxygen isotopes.
Half-life T½ = 2.25(9) s.
Decay mode | Daughter | Probability | Decay energy | γ energy (intensity) |
---|---|---|---|---|
β- | 22F | > 78 % | 6.49(6) MeV | |
β-, n | 21F | < 22 % | 1.259(57) MeV |
Direct parent isotopes are: 22N, 23N.
Z | Isotone N = 14 | Isobar A = 22 |
---|---|---|
5 | 19B | |
6 | 20C | 22C |
7 | 21N | 22N |
8 | 22O | 22O |
9 | 23F | 22F |
10 | 24Ne | 22Ne |
11 | 25Na | 22Na |
12 | 26Mg | 22Mg |
13 | 27Al | 22Al |
14 | 28Si | 22Si |
15 | 29P | |
16 | 30S | |
17 | 31Cl | |
18 | 32Ar | |
19 | 33K | |
20 | 34Ca |
[1] - A. G. Artukh, G. F. Gridnev, V. L. Mikheev, V.V. Volkov:
New isotopes 22O, 20N and 18C produced in transfer reactions with heavy ions.
In: Nuclear Physics A, 137, 2, (1969), DOI 10.1016/0375-9474(69)90114-6.
Last update: 2024-10-09
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