Oxygen-11 is a radioisotope of the chemical element oxygen, which has 3 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 11. The very short-lived, only artificially produced, unstable and thus radioactive nuclide has no practical significance; the study of 11O is exclusively for academic purposes.
The discovery of the extremely proton-rich isotope 11O was first reported in 2019. It was produced by a 2-neutron knockout reaction with oxygen-13 (13O) [1].
See also: list of Oxygen isotopes.
Half-life T½ = 198(12) ys respectively 198 × 10-24 seconds s.
Decay mode | Daughter | Probability | Decay energy | γ energy (intensity) |
---|---|---|---|---|
2p | 9C | 100 % |
Z | Isotone N = 3 | Isobar A = 11 |
---|---|---|
1 | 4H | |
2 | 5He | |
3 | 6Li | 11Li |
4 | 7Be | 11Be |
5 | 8B | 11B |
6 | 9C | 11C |
7 | 10N | 11N |
8 | 11O | 11O |
[1] - T. B. Webb et al.:
First Observation of Unbound 11O, the Mirror of the Halo Nucleus 11Li.
In: Physical Review Letters, (2019), DOI 10.1103/PhysRevLett.122.122501.
Last update: 2024-10-03
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