Oxygen-25
Properties and data of the isotope 25O.
See also: list of Oxygen isotopes.
General data
Name of the isotope:Oxygen-25; O-25Symbol:25O or 258OMass number A:25 (= number of nucleons)Atomic number Z:8 (= number of protons)Neutrons N:17Isotopic mass:25.02934(18) u (atomic weight of Oxygen-25)Nuclide mass:25.0249514 u (calculated nuclear mass without electrons)Mass excess:27.33003 MeVMass defect:0.180563828 u (per nucleus)Nuclear binding energy:168.1941224 MeV (per nucleus)
6.7277649 MeV (average binding energy per nucleon)Half-life:5.18 × 10-21 sDecay constant λ:1.338121970192 × 10+20 s-1Specific activity α:3.223343596911 × 10+42 Bq g-1
8.711739451111 × 10+31 Ci g-1Spin and parity:
(nuclear angular momentum)3/2+
Radioactive Decay
Half-life T½ = 5.18 × 10-21 s respectively 5.18 × 10-21 seconds s.
| Decay mode | Daughter | Probability | Decay energy | γ energy
(intensity) |
|---|
| n | 24O | | | |
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 17) and isobaric (same nucleon number A = 25) with Oxygen-25. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
| OZ | 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 | |
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.
Last update: 2023-09-01
Perma link: https://www.chemlin.org/isotope/oxygen-25
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