Aluminium-29
Properties and data of the isotope 29Al.
See also: list of Aluminium isotopes.
General data
Name of the isotope:Aluminium-29; Al-29Symbol:29Al or 2913AlMass number A:29 (= number of nucleons)Atomic number Z:13 (= number of protons)Neutrons N:16Isotopic mass:28.9804532(4) u (atomic weight of Aluminium-29)Nuclide mass:28.9733217 u (calculated nuclear mass without electrons)Mass excess:-18.20773 MeVMass defect:0.259910872 u (per nucleus)Nuclear binding energy:242.1054178 MeV (per nucleus)
8.34846268 MeV (average binding energy per nucleon)Separation energy:SN = 9.4284(3) MeV (first neutron)
SP = 10.4779(20) MeV (first proton)Half-life:6.56(6) minDecay constant λ:0.0017610446660568 s-1Specific activity α:3.787592514155 × 10+19 Bq g-1
1023673652.4744 Ci g-1Spin and parity:
(nuclear angular momentum)5/2+Mirror nucleus:Sulfur-29Year of discovery:1939
Radioactive Decay
Half-life T½ = 6.56(6) min (minutes) respectively 3.936 × 102 seconds s.
Decay mode | Daughter | Probability | Decay energy | γ energy (intensity) |
---|
β- | 29Si | 100 % | 3.687(3) MeV | |
Parent Nuclides
Direct parent isotope is: 29Mg.
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 16) and isobaric (same nucleon number A = 29) with Aluminium-29. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
OZ | Isotone N = 16 | Isobar A = 29 |
5 | 21B | |
6 | 22C | |
7 | 23N | |
8 | 24O | |
9 | 25F | 29F |
10 | 26Ne | 29Ne |
11 | 27Na | 29Na |
12 | 28Mg | 29Mg |
13 | 29Al | 29Al |
14 | 30Si | 29Si |
15 | 31P | 29P |
16 | 32S | 29S |
17 | 33Cl | 29Cl |
18 | 34Ar | |
19 | 35K | |
20 | 36Ca | |
21 | 37Sc | |
22 | 38Ti | |
External data and identifiers
Last update: 2023-10-04
Perma link: https://www.chemlin.org/isotope/aluminium-29
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