Aluminium-24m
Properties and data of the isotope 24Al.
See also: list of Aluminium isotopes.
General data
Name of the isotope:Aluminium-24m; Al-24mSymbol:24Al or 2413AlMass number A:24 (= number of nucleons)Atomic number Z:13 (= number of protons)Neutrons N:11Isotopic mass:23.99994754(25) u (atomic weight of Aluminium-24m)
Excitation energy: 425.8(1) keVNuclide mass:23.9928161 u (calculated nuclear mass without electrons)Mass excess:-0.04887 MeVMass defect:0.197091952 u (per nucleus)Nuclear binding energy:183.58997074 MeV (per nucleus)
7.64958211 MeV (average binding energy per nucleon)Half-life:130(3) msDecay constant λ:5.3319013889227 s-1Specific activity α:1.396063531103 × 10+23 Bq g-1
3773144678658.6 Ci g-1Spin and parity:
(nuclear angular momentum)1+Magnetic dipole moment:μ(μN) = 2.99(9)Nuclear g-factor:gl = 2.99
Radioactive Decay
Half-life T½ = 130(3) ms respectively 1.30 × 10-1 seconds s.
| Decay mode | Daughter | Probability | Decay energy | γ energy
(intensity) |
|---|
| EE/β+ | 24Mg | 17.5(30) % | 14.302 MeV | |
| ε, α | 20Ne | 0.028(6) % | 4.986 MeV | |
| Iso | 24Al | 82.5(30) % | 0,426 MeV | |
Nuclear Isomers
Nuclear isomers or excited states with the activation energy in keV related to the ground state.
| Nuclear Isomer | Excitation Energy | Half-life | Spin |
|---|
| 24Al | | 2.053(4) s | 4+ |
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 11) and isobaric (same nucleon number A = 24) with Aluminium-24m. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
| OZ | Isotone N = 11 | Isobar A = 24 |
|---|
| 4 | 15Be | |
| 5 | 16B | |
| 6 | 17C | |
| 7 | 18N | 24N |
| 8 | 19O | 24O |
| 9 | 20F | 24F |
| 10 | 21Ne | 24Ne |
| 11 | 22Na | 24Na |
| 12 | 23Mg | 24Mg |
| 13 | 24Al | 24Al |
| 14 | 25Si | 24Si |
| 15 | 26P | 24P |
| 16 | 27S | |
| 17 | 28Cl | |
External data and identifiers
Last update: 2020-10-12
Perma link: https://www.chemlin.org/isotope/aluminium-24m
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