See also: List of individual Cobalt isotopes (and general data sources).
General data
Name of the isotope:Cobalt-64; Co-64Symbol:64Co or 6427CoMass number A:64 (= number of nucleons)Atomic number Z:27 (= number of protons)Neutrons N:37Nucleon pairing (Z - N):odd - oddNuclear ratio (N/Z ratio):1.3703703703704 (= neutron-proton ratio)Neutron excess (N-Z):10Isotopic mass:63.935810(21) u (atomic weight of Cobalt-64)Nuclide mass:63.9209987 u (calculated nuclear mass without electrons)Mass excess:-59.7926 MeVMass defect:0.596067756 u (per nucleus)Nuclear binding energy:555.23353831 MeV (per nucleus) 8.67552404 MeV (average binding energy per nucleon)Separation energy:SN = 6.012(27) MeV (first neutron) SP = 11.446(20) MeV (first proton)Half-life:0.30(3) sDecay constant λ:2.3104906018665 s-1Specific activity α:2.176260788609 × 10+22 Bq g-1 588178591516 Ci g-1Spin and parity: (nuclear angular momentum)1+Year of discovery:1969
Radioactive Decay
Half-life T½ = 0.30(3) s respectively 3.0 × 10-1 seconds s.
The following table shows the atomic nuclei that are isotonic (same neutron number N = 37) and isobaric (same nucleon number A = 64) with Cobalt-64. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
