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Cobalt-69

Properties and data of the isotope 69Co.


Content

See also: list of Cobalt isotopes.

 

General data

Name of the isotope:Cobalt-69; Co-69Symbol:69Co or 6927CoMass number A:69 (= number of nucleons)Atomic number Z:27 (= number of protons)Neutrons N:42Isotopic mass:68.94602(15) u (atomic weight of Cobalt-69)Nuclide mass:68.9312087 u (calculated nuclear mass without electrons)Mass excess:-50.28205 MeVMass defect:0.629182336 u (per nucleus)Nuclear binding energy:586.07957089 MeV (per nucleus)
8.49390682 MeV (average binding energy per nucleon)
Separation energy:SN = 6.42(24) MeV (first neutron)
SP = 14.08(39) MeV (first proton)
Half-life:227(11) msDecay constant λ:3.0535118086341 s-1Specific activity α:2.704217386628 × 10+22 Bq g-1
730869563953.7 Ci g-1
Spin and parity:
(nuclear angular momentum)
(7/2-)Year of discovery:1985

 

Radioactive Decay

Half-life T½ = 227(11) ms respectively 2.27 × 10-1 seconds s.

Decay modeDaughterProbabilityDecay energyγ energy
(intensity)
β-69Ni100 %9.70(14) MeV

 

Parent Nuclides

Direct parent isotope is: 69Fe.

 

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 42) and isobaric (same nucleon number A = 69) with Cobalt-69. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

 

OZIsotone N = 42Isobar A = 69
2365V
2466Cr
2567Mn69Mn
2668Fe69Fe
2769Co69Co
2870Ni69Ni
2971Cu69Cu
3072Zn69Zn
3173Ga69Ga
3274Ge69Ge
3375As69As
3476Se69Se
3577Br69Br
3678Kr69Kr
3779Rb
3880Sr
3981Y
4082Zr
4183Nb
4284Mo
4385Tc
4486Ru

 

External data and identifiers

Adopted Levels, Gammas:NuDat 69Co

 


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Last update: 2020-10-14


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