About   |   More   |   Search
ChemLin Logo

Magnesium-40

Properties and data of the isotope 40Mg.


Content

See also: list of Magnesium isotopes.

 

General data

Name of the isotope:Magnesium-40; Mg-40Symbol:40Mg or 4012MgMass number A:40 (= number of nucleons)Atomic number Z:12 (= number of protons)Neutrons N:28Isotopic mass:40.05191(54) u (atomic weight of Magnesium-40)Nuclide mass:40.0453271 u (calculated nuclear mass without electrons)Mass excess:48.35385 MeVMass defect:0.284608032 u (per nucleus)Nuclear binding energy:265.11067416 MeV (per nucleus)
6.62776685 MeV (average binding energy per nucleon)
Separation energy:SN = 2.00(72) MeV (first neutron)Half-life:170 nsDecay constant λ:4077336.356235 s-1Specific activity α:6.138573467647 × 10+28 Bq g-1
1.659073910174 × 10+18 Ci g-1
Spin and parity:
(nuclear angular momentum)
0+Year of discovery:2007

 

Radioactive Decay

Half-life T½ = 170 ns respectively 1.70 × 10-7 seconds s.

Decay modeDaughterProbabilityDecay energyγ energy
(intensity)
β- ?40Al100 %20.76(64) MeV
β-, n39Al?19.63(64) MeV
β-, 2n38Al?

 

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 28) and isobaric (same nucleon number A = 40) with Magnesium-40. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

 

OZIsotone N = 28Isobar A = 40
1139Na
1240Mg40Mg
1341Al40Al
1442Si40Si
1543P40P
1644S40S
1745Cl40Cl
1846Ar40Ar
1947K40K
2048Ca40Ca
2149Sc40Sc
2250Ti40Ti
2351V40V
2452Cr
2553Mn
2654Fe
2755Co
2856Ni
2957Cu
3058Zn
3159Ga
3260Ge

 

External data and identifiers

Adopted Levels, Gammas:NuDat 40Mg

 


More Chemistry

isotopes

 

 

 

 

Social Media

Facebook

LinkedIn

Twitter

 

 


Last update: 2020-10-12


© 1996 - 2024 ChemLin