Oxygen-14 is a radioisotope of the chemical element oxygen, which has 6 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 14. In the form of isotope beams, the radioactive isotope is of interest in the study of matter - particularly for the structural elucidation of proton-rich atomic nuclei; however, there is no practical technical application for 14O.
Oxygen-14 was first observed (1949) in experiments in which nitrogen gas was irradiated with 17 MeV protons in a cyclotron [1]:
14N(p,n)14O.
Other nuclear reactions in which O-14 is produced are now known; these include:
12C(3He,n)14O,
12C(α,2n)14O [2].
See also: list of Oxygen isotopes.
Half-life T½ = 70.621(11) s respectively 7.0621 × 101 seconds s.
Decay mode | Daughter | Probability | Decay energy | Details | γ energy (intensity) |
---|---|---|---|---|---|
EC,β+ | 14N | 100 % | 5.144364(25) MeV | β+: 0.770(55) MeV [99.249(10) %] | 2m312593(11) MeV [99.388(11) %] |
Z | Isotone N = 6 | Isobar A = 14 |
---|---|---|
1 | 7H | |
2 | 8He | |
3 | 9Li | |
4 | 10Be | 14Be |
5 | 11B | 14B |
6 | 12C | 14C |
7 | 13N | 14N |
8 | 14O | 14O |
9 | 15F | 14F |
10 | 16Ne | |
11 | 17Na | |
12 | 18Mg |
[1] - R. Sherr, H. R. Muether, M. G. White:
Radioactivity of C10 and O14.
In: Physical Review, 75, 282, (1949), DOI 10.1103/PhysRev.75.282.
[2] - T. Nozaki, M. Iwamoto:
Yield of 14O for the Reactions 14N(p,n)14O, 12C(3He,n)14O and 12C(α,2n)14O.
In: Radiochimica Acta, 29, (1981), DOI 10.1524/ract.1981.29.23.57.
[3] - S. Giraud et al.:
β+ Gamow-Teller Strengths from Unstable 14O via the (d,2He) Reaction in Inverse Kinematics.
In: Physical Review Letters,130, 232301, (2023), DOI 10.1103/PhysRevLett.130.232301.
Last update: 2024-10-03
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