Aluminium-28 (Aluminum-28) is a radioisotope of the chemical element aluminium, which has 15 neutrons in the atomic nucleus in addition to the element-specific 13 protons, resulting 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 28Al serves exclusively academic purposes.
The discovery of the radioactive isotope was reported in 1934 by I. Curie and F. Joliot, who observed aluminium-28 during the irradiation of a Mg template with alpha particles [1].
Another method for producing the nuclide 28Al is the irradiation of silicon-29 with deuterons (hydrogen-2 nuclei) [2]:
29Si(d,3He)28Al.
See also: list of Aluminium isotopes.
Half-life T½ = 2.245(2) min (minutes) respectively 1.3470 × 102 seconds s.
Decay mode | Daughter | Probability | Decay energy | Details | γ energy (intensity) |
---|---|---|---|---|---|
β- | 28Si | 100 % | 4.64208(5) MeV | β-: 1.241.80 MeV 99.99(1) % | 1.778987(15) MeV 100 % |
Direct parent isotope is: 28Mg.
Z | Isotone N = 15 | Isobar A = 28 |
---|---|---|
5 | 20B | |
6 | 21C | |
7 | 22N | |
8 | 23O | 28O |
9 | 24F | 28F |
10 | 25Ne | 28Ne |
11 | 26Na | 28Na |
12 | 27Mg | 28Mg |
13 | 28Al | 28Al |
14 | 29Si | 28Si |
15 | 30P | 28P |
16 | 31S | 28S |
17 | 32Cl | 28Cl |
18 | 33Ar | |
19 | 34K | |
20 | 35Ca | |
21 | 36Sc |
[1] - Irène Curie, F. Joliot:
Production artificielle d'éléments radioactifs - II. Preuve chimique de la transmutation des éléments.
In: J. Phys. Radium, 5, 4, (1934), DOI 10.1051/jphysrad:0193400504015300.
[2] - J. Vernotte et al.:
29Si(d,3He)28Al reaction at 29 MeV.
In: Physical Review C, (1994), DOI 10.1103/PhysRevC.49.1559.
Last update: 2024-11-07
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