See also: List of individual Hafnium isotopes (and general data sources).
General data
Name of the isotope:Hafnium-182; Hf-182Symbol:182Hf or 18272HfMass number A:182 (= number of nucleons)Atomic number Z:72 (= number of protons)Neutrons N:110Nucleon pairing (Z - N):even - evenNuclear ratio (N/Z ratio):1.5277777777778 (= neutron-proton ratio)Neutron excess (N-Z):38Isotopic mass:181.950564(7) u (atomic weight of Hafnium-182)Nuclide mass:181.91107 u (calculated nuclear mass without electrons)Mass excess:-46.04934 MeVMass defect:1.565979064 u (per nucleus)Nuclear binding energy:1458.70010224 MeV (per nucleus) 8.01483573 MeV (average binding energy per nucleon)Separation energy:SN = 6.718(6) MeV (first neutron) SP = 8.54(13) MeV (first proton)Half-life:8.90(9) × 106 yearsDecay constant λ:2.469612686481 × 10-15 s-1Specific activity α:8173843.9792227 Bq g-1 0.00022091470214115 Ci g-1Spin and parity: (nuclear angular momentum)0+Charge radius:5.3516(36) femtometer fmYear of discovery:1961
Radioactive Decay
Half-life T½ = 8.90(9) × 106 years respectively 2.806704 × 1014 seconds s.
The following table shows the atomic nuclei that are isotonic (same neutron number N = 110) and isobaric (same nucleon number A = 182) with Hafnium-182. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
