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Magnesium-37

Properties and data of the isotope 37Mg.


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Magnesium-37 isotope

Magnesium-37 is a radioisotope of the chemical element Magnesium, which, in addition to the element-specific 12 protons, has 25 neutrons in the atomic nucleus, resulting in the mass number 37. The very short-lived, unstable and therefore radioactive nuclide, which can only be produced artificially, has no practical significance; The study of 37Mg is for academic purposes only.

It is assumed that the nuclide has an exotic nuclear structure and forms halo nuclei with one neutron (one-neutron halo).

See also: list of Magnesium isotopes.

 

General data

Name of the isotope:Magnesium-37; Mg-37Symbol:37Mg or 3712MgMass number A:37 (= number of nucleons)Atomic number Z:12 (= number of protons)Neutrons N:25Isotopic mass:37.03029(75) u (atomic weight of Magnesium-37)Nuclide mass:37.0237071 u (calculated nuclear mass without electrons)Mass excess:28.21495 MeVMass defect:0.280233284 u (per nucleus)Nuclear binding energy:261.03562265 MeV (per nucleus)
7.05501683 MeV (average binding energy per nucleon)
Separation energy:SN = 0.24(11) MeV (first neutron)
SP = 24.98(98) MeV (first proton)
Half-life:8(4) msDecay constant λ:86.643397569993 s-1Specific activity α:1.410212823648 × 10+24 Bq g-1
38113860098611 Ci g-1
Spin and parity:
(nuclear angular momentum)
(7/2-)Year of discovery:1996

 

Radioactive Decay

Half-life T½ = 8(4) ms respectively 8 × 10-3 seconds s.

Decay modeDaughterProbabilityDecay energyγ energy
(intensity)
β-37Al?18.40(72) MeV
β-, n36Al?14.19(71) MeV
β-, 2n35Al?

 

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 25) and isobaric (same nucleon number A = 37) with Magnesium-37. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

 

OZIsotone N = 25Isobar A = 37
1136Na37Na
1237Mg37Mg
1338Al37Al
1439Si37Si
1540P37P
1641S37S
1742Cl37Cl
1843Ar37Ar
1944K37K
2045Ca37Ca
2146Sc37Sc
2247Ti
2348V
2449Cr
2550Mn
2651Fe
2752Co
2853Ni
2954Cu
3055Zn

 

External data and identifiers

Adopted Levels, Gammas:NuDat 37Mg

 

Literature and References

[1] - N. Kobayashi et al.:
Observation of a p-Wave One-Neutron Halo Configuration in 37Mg.
In: Physical Review Letters, 112, 242501, (2014), DOI 10.1103/PhysRevLett.112.242501.

[2] - K.Y. Zhang et al.:
Missed prediction of the neutron halo in 37Mg.
In: Physics Letters B, 844, 138112, (2023), DOI 10.1016/j.physletb.2023.138112.

 


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Last update: 2023-10-17


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