Oxygen-25 is a radioisotope of the chemical element oxygen, which has 17 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 25. The very short-lived, only artificially produced, unstable and thus radioactive nuclide has no practical significance; the study of 25O is exclusively for academic purposes.
The neutron-free ground state of oxygen-25 was first reported in 2008; the neutron-rich nuclide was produced by a 1-proton knockout reaction during irradiation of beryllium with fluorine-26 (85 MeV/u) [1].
See also: list of Oxygen isotopes.
Half-life T½ = 5.18 zs respectively 5.18 × 10-21 seconds s.
Decay mode | Daughter | Probability | Decay energy | γ energy (intensity) |
---|---|---|---|---|
n | 24O | 100 % |
Z | Isotone N = 17 | Isobar A = 25 |
---|---|---|
7 | 24N | 25N |
8 | 25O | 25O |
9 | 26F | 25F |
10 | 27Ne | 25Ne |
11 | 28Na | 25Na |
12 | 29Mg | 25Mg |
13 | 30Al | 25Al |
14 | 31Si | 25Si |
15 | 32P | 25P |
16 | 33S | |
17 | 34Cl | |
18 | 35Ar | |
19 | 36K | |
20 | 37Ca | |
21 | 38Sc | |
22 | 39Ti | |
23 | 40V | |
24 | 41Cr | |
25 | 42Mn |
[1] - C. R. Hoffman, T. Baumann, D. Bazin et al.:
Determination of the N=16 Shell Closure at the Oxygen Drip Line.
In: Physical Review Letters, 100, 152502, (2008), DOI 10.1103/PhysRevLett.100.152502.
[2] - C. Caesar et al.:
Beyond the neutron drip line: The unbound oxygen isotopes 25O and 26O.
In: Physical Review C, (2013), DOI 10.1103/PhysRevC.88.034313.
Last update: 2024-10-10
Perma link: https://www.chemlin.org/isotope/oxygen-25
© 1996 - 2025 ChemLin