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Magnesium-29

Properties and data of the isotope 29Mg.


Content

See also: list of Magnesium isotopes.

 

General data

Name of the isotope:Magnesium-29; Mg-29Symbol:29Mg or 2912MgMass number A:29 (= number of nucleons)Atomic number Z:12 (= number of protons)Neutrons N:17Isotopic mass:28.988617(12) u (atomic weight of Magnesium-29)Nuclide mass:28.9820341 u (calculated nuclear mass without electrons)Mass excess:-10.6032 MeVMass defect:0.252586956 u (per nucleus)Nuclear binding energy:235.28323399 MeV (per nucleus)
8.11321497 MeV (average binding energy per nucleon)
Separation energy:SN = 3.655(12) MeV (first neutron)
SP = 16.903(15) MeV (first proton)
Half-life:1.30(12) sDecay constant λ:0.53319013889227 s-1Specific activity α:1.14676647197 × 10+22 Bq g-1
309936884318.38 Ci g-1
Spin and parity:
(nuclear angular momentum)
3/2+Magnetic dipole moment:μ(μN) = +0.9779(6)Nuclear g-factor:gl = 0.65193333333333Mirror nucleus:Chlorine-29Year of discovery:1971

 

Radioactive Decay

Half-life T½ = 1.30(12) s.

Decay modeDaughterProbabilityDecay energyγ energy
(intensity)
β-29Al100 %7.61254 MeV

 

Parent Nuclides

Direct parent isotopes are: 29Na, 30Na, 31Na.

 

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 17) and isobaric (same nucleon number A = 29) with Magnesium-29. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

 

OZIsotone N = 17Isobar A = 29
724N
825O
926F29F
1027Ne29Ne
1128Na29Na
1229Mg29Mg
1330Al29Al
1431Si29Si
1532P29P
1633S29S
1734Cl29Cl
1835Ar
1936K
2037Ca
2138Sc
2239Ti
2340V
2441Cr
2542Mn

 

External data and identifiers

Adopted Levels, Gammas:NuDat 29Mg

 


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Last update: 2023-10-04


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