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Magnesium-33

Properties and data of the isotope 33Mg.


Content

See also: list of Magnesium isotopes.

 

General data

Name of the isotope:Magnesium-33; Mg-33Symbol:33Mg or 3312MgMass number A:33 (= number of nucleons)Atomic number Z:12 (= number of protons)Neutrons N:21Isotopic mass:33.005327(3) u (atomic weight of Magnesium-33)Nuclide mass:32.9987441 u (calculated nuclear mass without electrons)Mass excess:4.96207 MeVMass defect:0.27053662 u (per nucleus)Nuclear binding energy:252.00323831 MeV (per nucleus)
7.63646177 MeV (average binding energy per nucleon)
Separation energy:SN = 2.280(4) MeV (first neutron)
SP = 20.97(4) MeV (first proton)
Half-life:90.5(16) msDecay constant λ:7.6590848680657 s-1Specific activity α:1.397699634354 × 10+23 Bq g-1
3777566579336.8 Ci g-1
Spin and parity:
(nuclear angular momentum)
3/2-Magnetic dipole moment:μ(μN) = - 0.7455(5)Nuclear g-factor:gl = -0.497Year of discovery:1979

 

Radioactive Decay

Half-life T½ = 90.5(16) ms respectively 9.05 × 10-2 seconds s.

Decay modeDaughterProbabilityDecay energyγ energy
(intensity)
β-33Al86(2) %13.38438 MeV
β-, n32Al14(2) %7.93781 MeV

 

Parent Nuclides

Direct parent isotopes are: 33Na, 34Na.

 

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 21) and isobaric (same nucleon number A = 33) with Magnesium-33. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

 

OZIsotone N = 21Isobar A = 33
930F
1031Ne33Ne
1132Na33Na
1233Mg33Mg
1334Al33Al
1435Si33Si
1536P33P
1637S33S
1738Cl33Cl
1839Ar33Ar
1940K33K
2041Ca
2142Sc
2243Ti
2344V
2445Cr
2546Mn
2647Fe
2748Co
2849Ni

 

External data and identifiers

Adopted Levels, Gammas:NuDat 33Mg

 


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Last update: 2020-10-12


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