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Magnesium-23

Properties and data of the isotope 23Mg.


Content

See also: list of Magnesium isotopes.

 

General data

Name of the isotope:Magnesium-23; Mg-23Symbol:23Mg or 2312MgMass number A:23 (= number of nucleons)Atomic number Z:12 (= number of protons)Neutrons N:11Isotopic mass:22.99412394(17) u (atomic weight of Magnesium-23)Nuclide mass:22.987541 u (calculated nuclear mass without electrons)Mass excess:-5.47351 MeVMass defect:0.19509052 u (per nucleus)Nuclear binding energy:181.72564884 MeV (per nucleus)
7.90111517 MeV (average binding energy per nucleon)
Separation energy:SN = 13.1449(3) MeV (first neutron)
SP = 7.58097(23) MeV (first proton)
Half-life:11.317(11) sDecay constant λ:0.061248314973928 s-1Specific activity α:1.676572637303 × 10+21 Bq g-1
45312773981.176 Ci g-1
Spin and parity:
(nuclear angular momentum)
3/2+Magnetic dipole moment:μ(μN) = -0.5363(3)Nuclear g-factor:gl = -0.35753333333333Charge radius:0 femtometer fmMirror nucleus:Sodium-23Year of discovery:1939

 

Radioactive Decay

Half-life T½ = 11.317(11) s respectively 1.1317 × 101 seconds s.

Decay modeDaughterProbabilityDecay energyγ energy
(intensity)
EE β+23Na100 %4.05634(16) MeV

 

Parent Nuclides

Direct parent isotopes are: 24Si, 23Al.

 

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 11) and isobaric (same nucleon number A = 23) with Magnesium-23. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

 

OZIsotone N = 11Isobar A = 23
415Be
516B
617C
718N23N
819O23O
920F23F
1021Ne23Ne
1122Na23Na
1223Mg23Mg
1324Al23Al
1425Si23Si
1526P
1627S
1728Cl

 

External data and identifiers

Adopted Levels, Gammas:NuDat 23Mg

 


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Last update: 2023-10-04


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