Sulfur-28 is a radioisotope of the chemical element sulfur, which has 12 neutrons in its atomic nucleus in addition to the element-specific 16 protons; the sum of the number of these atomic nucleus building blocks results in a mass number of 28. The very short-lived, only artificially produced, unstable and thus radioactive nuclide has no practical significance; the study of 28S is exclusively for academic purposes.
The proton-rich isotope was first produced and identified by the pion-induced double charge exchange reaction 28Si(π+,π-)28S [1, (1982)].
See also: List of individual Sulfur isotopes (and general data sources).
Half-life T½ = 125(10) ms respectively 1.25 × 10-1 seconds s.
| Decay mode | Daughter | Probability | Decay energy | γ energy (intensity) |
|---|---|---|---|---|
| EC/β+ | 28P | 79.3 % | 11.221(160) MeV | |
| ε, p | 27Si | 20.7(19) % | 9.169 MeV |
| Z | Isotone N = 12 | Isobar A = 28 |
|---|---|---|
| 4 | 16Be | |
| 5 | 17B | |
| 6 | 18C | |
| 7 | 19N | |
| 8 | 20O | 28O |
| 9 | 21F | 28F |
| 10 | 22Ne | 28Ne |
| 11 | 23Na | 28Na |
| 12 | 24Mg | 28Mg |
| 13 | 25Al | 28Al |
| 14 | 26Si | 28Si |
| 15 | 27P | 28P |
| 16 | 28S | 28S |
| 17 | 29Cl | 28Cl |
| 18 | 30Ar | |
| 19 | 31K |
[1] - C. L. Morris et al.:
Target mass dependence of isotensor double charge exchange: Evidence for deltas in nuclei.
In: Physical Review C, 25, 3218(R), (1982), DOI 10.1103/PhysRevC.25.3218.
[2] - S. A. Gillespie et al.:
Proton decay spectroscopy of 28S and 30Cl.
In: Physical Review C, 105, 044321, (2022), DOI 10.1103/PhysRevC.105.044321.
Last update: 2025-12-30
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