Oxygen-22
Properties and data of the isotope 22O.
See also: list of Oxygen isotopes.
General data
Name of the isotope:Oxygen-22; O-22Symbol:22O or 228OMass number A:22 (= number of nucleons)Atomic number Z:8 (= number of protons)Neutrons N:14Isotopic mass:22.00997(6) u (atomic weight of Oxygen-22)Nuclide mass:22.0055814 u (calculated nuclear mass without electrons)Mass excess:9.287 MeVMass defect:0.17393908 u (per nucleus)Nuclear binding energy:162.02320939 MeV (per nucleus)
7.36469134 MeV (average binding energy per nucleon)Separation energy:SN = 6.85(6) MeV (first neutron)
SP = 23.24(15) MeV (first proton)Half-life:2.25(9) sDecay constant λ:0.3080654135822 s-1Specific activity α:8.432787793939 × 10+21 Bq g-1
227913183619.98 Ci g-1Spin and parity:
(nuclear angular momentum)0+Mirror nucleus:Silicon-22Year of discovery:1969
Radioactive Decay
Half-life T½ = 2.25(9) s.
Decay mode | Daughter | Probability | Decay energy | γ energy (intensity) |
---|
β- | 22F | > 88 % | 6.4882 MeV | |
β-, n | 21F | < 22 % | 1.2579 MeV | |
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 14) and isobaric (same nucleon number A = 22) with Oxygen-22. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
OZ | 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 | |
External data and identifiers
Last update: 2023-10-03
Perma link: https://www.chemlin.org/isotope/oxygen-22
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