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Magnesium-19

Properties and data of the isotope 19Mg.


Content

See also: list of Magnesium isotopes.

 

General data

Name of the isotope:Magnesium-19; Mg-19Symbol:19Mg or 1912MgMass number A:19 (= number of nucleons)Atomic number Z:12 (= number of protons)Neutrons N:7Isotopic mass:19.03417(5) u (atomic weight of Magnesium-19)Nuclide mass:19.0275871 u (calculated nuclear mass without electrons)Mass excess:31.82915 MeVMass defect:0.120384796 u (per nucleus)Nuclear binding energy:112.13771517 MeV (per nucleus)
5.90198501 MeV (average binding energy per nucleon)
Separation energy:
SP = 0.50(11) MeV (first proton)
Half-life:5(3) psDecay constant λ:138629436111.99 s-1Specific activity α:4.393926271578 × 10+33 Bq g-1
1.187547640967 × 10+23 Ci g-1
Spin and parity:
(nuclear angular momentum)
1/2-Mirror nucleus:Nitrogen-19Year of discovery:2007

 

Radioactive Decay

Half-life T½ = 5(3) ps respectively 5 × 10-12 seconds s.

Decay modeDaughterProbabilityDecay energyγ energy
(intensity)
2p17Neca. 100 %

 

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 7) and isobaric (same nucleon number A = 19) with Magnesium-19. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

 

OZIsotone N = 7Isobar A = 19
29He
310Li
411Be
512B19B
613C19C
714N19N
815O19O
916F19F
1017Ne19Ne
1118Na19Na
1219Mg19Mg

 

External data and identifiers

Adopted Levels, Gammas:NuDat 19Mg

 


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Last update: 2023-10-03


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