See also: List of individual Germanium isotopes (and general data sources).
General data
Name of the isotope:Germanium-66; Ge-66Symbol:66Ge or 6632GeMass number A:66 (= number of nucleons)Atomic number Z:32 (= number of protons)Neutrons N:34Nucleon pairing (Z - N):even - evenNuclear ratio (N/Z ratio):1.0625 (= neutron-proton ratio)Neutron excess (N-Z):2Isotopic mass:65.9338621(26) u (atomic weight of Germanium-66)Nuclide mass:65.9163081 u (calculated nuclear mass without electrons)Mass excess:-61.60706 MeVMass defect:0.61114606800001 u (per nucleus)Nuclear binding energy:569.27889547 MeV (per nucleus) 8.62543781 MeV (average binding energy per nucleon)Separation energy:SN = 13.200(3) MeV (first neutron) SP = 6.2385(25) MeV (first proton)Half-life:2.26(5) hDecay constant λ:8.519508118976 × 10-5 s-1Specific activity α:7.781385082619 × 10+17 Bq g-1 21030770.493565 Ci g-1Spin and parity: (nuclear angular momentum)0+Mirror nucleus:Selenium-66Year of discovery:1950
Radioactive Decay
Half-life T½ = 2.26(5) h (hours) respectively 8.136 × 103 seconds s.
The following table shows the atomic nuclei that are isotonic (same neutron number N = 34) and isobaric (same nucleon number A = 66) with Germanium-66. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
