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Cobalt-60

Properties and data of the isotope 60Co.


Content

See also: list of Cobalt isotopes.

 

General data

Name of the isotope:Cobalt-60; Co-60Symbol:60Co or 6027CoMass number A:60 (= number of nucleons)Atomic number Z:27 (= number of protons)Neutrons N:33Isotopic mass:59.9338157(5) u (atomic weight of Cobalt-60)Nuclide mass:59.9190044 u (calculated nuclear mass without electrons)Mass excess:-61.65028 MeVMass defect:0.563402392 u (per nucleus)Nuclear binding energy:524.80594773 MeV (per nucleus)
8.7467658 MeV (average binding energy per nucleon)
Separation energy:SN = 7.49192(7) MeV (first neutron)
SP = 8.2745(4) MeV (first proton)
Half-life:5.2713(8) aDecay constant λ:4.169664576716 × 10-9 s-1Specific activity α:42559843084194 Bq g-1
1150.2660293025 Ci g-1
Spin and parity:
(nuclear angular momentum)
5+Magnetic dipole moment:μ(μN) = + 3.799(8)Quadrupole moment Q:+0.44(5) barn (100 fm2)Nuclear g-factor:gl = 0.7598Year of discovery:1941

 

Radioactive Decay

Half-life T½ = 5.2713(8) a respectively 1.66235717 × 108 seconds s.

Decay modeDaughterProbabilityDecay energyγ energy
(intensity)
β-60Ni100 %2.82281(21) MeV

 

Parent Nuclides

Direct parent isotope is: 60Fe.

 

Nuclear Isomers

Nuclear isomers or excited states with the activation energy in keV related to the ground state.

Nuclear IsomerExcitation EnergyHalf-lifeSpin
60mCo58.59(1) keV10.467(6) min2+

 

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 33) and isobaric (same nucleon number A = 60) with Cobalt-60. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

 

OZIsotone N = 33Isobar A = 60
1649S
1750Cl
1851Ar
1952K
2053Ca
2154Sc60Sc
2255Ti60Ti
2356V60V
2457Cr60Cr
2558Mn60Mn
2659Fe60Fe
2760Co60Co
2861Ni60Ni
2962Cu60Cu
3063Zn60Zn
3164Ga60Ga
3265Ge60Ge
3366As
3467Se
3568Br
3669Kr

 

External data and identifiers

Adopted Levels, Gammas:NuDat 60Co

 


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Last update: 2023-10-04


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