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Magnesium-25

Properties and data of the isotope 25Mg.


Content

See also: list of Magnesium isotopes.

 

General data

Name of the isotope:Magnesium-25; Mg-25Symbol:25Mg or 2512MgMass number A:25 (= number of nucleons)Atomic number Z:12 (= number of protons)Neutrons N:13Isotopic mass:24.9858370(3) u (atomic weight of Magnesium-25)Nuclide mass:24.9792541 u (calculated nuclear mass without electrons)Mass excess:-13.19275 MeVMass defect:0.220707292 u (per nucleus)Nuclear binding energy:205.58751825 MeV (per nucleus)
8.22350073 MeV (average binding energy per nucleon)
Separation energy:SN = 7.33053(5) MeV (first neutron)
SP = 12.06385(5) MeV (first proton)
Half-life:stableSpin and parity:
(nuclear angular momentum)
5/2+Magnetic dipole moment:μ(μN) = -0.85533(3)Charge radius:3.0284(22) femtometer fmMirror nucleus:Aluminium-25Year of discovery:1920

 

Parent Nuclides

Direct parent isotopes are: 25Al, 25Na.

 

Occurrence

Comparison of the natural Magnesium isotopes including isotopic abundance (mole fraction of the isotope mixture in percent):

 

Atomic Mass maQuantityHalf-lifeSpin
Magnesium
Isotopic mixture
24.305 u100 %
Isotope 24Mg23.98504170(9) u78.965 %
[78.88 - 79.05 %]
stable0+
Isotope 25Mg24.9858370(3) u10.011 %
[9.988 - 10.034 %]
stable5/2+
Isotope 26Mg25.9825930(2) u11.024 %
[10.96 - 11.09 %]
stable0+

 

NMR data

Nuclear magnetic properties of the NMR active Nuclide 25Mg

Isotope:25Mg-NMRQuantity:10.011 % [9.988 - 10.034 %]Spin:5/2+Nuclearmagnetic moment
μ/μN:
-0.85533(3)Gyromagnetic ratio γ:- 1.639 · 107 rad T-1 s-1Nuclear g-factor:gl = -0.342132Quadrupole moment Q:+ 0.1994(20) barn (100 fm2)Resonance frequency:v0 = 2.6083 at 1 TRelative Sensitivity:0.002698 (H0 = const.)
0.7147 (v0 = const.)
[related to 1H = 1.000]

 

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 13) and isobaric (same nucleon number A = 25) with Magnesium-25. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

 

OZIsotone N = 13Isobar A = 25
518B
619C
720N25N
821O25O
922F25F
1023Ne25Ne
1124Na25Na
1225Mg25Mg
1326Al25Al
1427Si25Si
1528P25P
1629S
1730Cl
1831Ar
1932K

 

External data and identifiers

Adopted Levels, Gammas:NuDat 25Mg

 


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Last update: 2023-10-04


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