See also: List of individual Chromium isotopes (and general data sources).
General data
Name of the isotope:Chromium-64; Cr-64Symbol:64Cr or 6424CrMass number A:64 (= number of nucleons)Atomic number Z:24 (= number of protons)Neutrons N:40Nucleon pairing (Z - N):even - evenNuclear ratio (N/Z ratio):1.6666666666667 (= neutron-proton ratio)Neutron excess (N-Z):16Isotopic mass:63.96406(47) u (atomic weight of Chromium-64)Nuclide mass:63.9508944 u (calculated nuclear mass without electrons)Mass excess:-33.47789 MeVMass defect:0.570337408 u (per nucleus)Nuclear binding energy:531.26587353 MeV (per nucleus) 8.30102927 MeV (average binding energy per nucleon)Separation energy:SN = 5.54(57) MeV (first neutron) SP = 18.88(59) MeV (first proton)Half-life:43(1) msDecay constant λ:16.119701873487 s-1Specific activity α:1.517650907265 × 10+23 Bq g-1 4101759208825.1 Ci g-1Spin and parity: (nuclear angular momentum)0+Year of discovery:1992
Radioactive Decay
Half-life T½ = 43(1) ms respectively 4.3 × 10-2 seconds s.
The following table shows the atomic nuclei that are isotonic (same neutron number N = 40) and isobaric (same nucleon number A = 64) with Chromium-64. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
