Oxygen-26
Properties and data of the isotope 26O.
See also: list of Oxygen isotopes.
General data
Name of the isotope:Oxygen-26; O-26Symbol:26O or 268OMass number A:26 (= number of nucleons)Atomic number Z:8 (= number of protons)Neutrons N:18Isotopic mass:26.03721(18) u (atomic weight of Oxygen-26)Nuclide mass:26.0328214 u (calculated nuclear mass without electrons)Mass excess:34.66089 MeVMass defect:0.181358744 u (per nucleus)Nuclear binding energy:168.93458188 MeV (per nucleus)
6.49748392 MeV (average binding energy per nucleon)Separation energy:SN = 0.739(10) MeV (first neutron)
SP = 28.61(53) MeV (first proton)Half-life:4.5(+32-34) psDecay constant λ:154032706791.1 s-1Specific activity α:3.567717912820 × 10+33 Bq g-1
9.642480845460 × 10+22 Ci g-1Spin and parity:
(nuclear angular momentum)0+Year of discovery:2012
Radioactive Decay
Half-life T½ = 4.5(+32-34) ps respectively 4.5 × 10-12 seconds s.
Decay mode | Daughter | Probability | Decay energy | γ energy (intensity) |
---|
2n | 24O | 100 % | | |
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 18) and isobaric (same nucleon number A = 26) with Oxygen-26. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
OZ | Isotone N = 18 | Isobar A = 26 |
7 | 25N | |
8 | 26O | 26O |
9 | 27F | 26F |
10 | 28Ne | 26Ne |
11 | 29Na | 26Na |
12 | 30Mg | 26Mg |
13 | 31Al | 26Al |
14 | 32Si | 26Si |
15 | 33P | 26P |
16 | 34S | 26S |
17 | 35Cl | |
18 | 36Ar | |
19 | 37K | |
20 | 38Ca | |
21 | 39Sc | |
22 | 40Ti | |
23 | 41V | |
24 | 42Cr | |
25 | 43Mn | |
External data and identifiers
Literature and References
[1] - 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.
[2] - Sonja Storck-Dutine:
Measurement of the Neutron-Decay Lifetime of the 26O Ground State.
In: Dissertation TU Darmstadt, (2023), DOI 10.26083/tuprints-00023768.
Last update: 2023-09-01
Perma link: https://www.chemlin.org/isotope/oxygen-26
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