See also: List of individual Ytterbium isotopes (and general data sources).
General data
Name of the isotope:Ytterbium-166; Yb-166Symbol:166Yb or 16670YbMass number A:166 (= number of nucleons)Atomic number Z:70 (= number of protons)Neutrons N:96Nucleon pairing (Z - N):even - evenNuclear ratio (N/Z ratio):1.3714285714286 (= neutron-proton ratio)Neutron excess (N-Z):26Isotopic mass:165.933874(8) u (atomic weight of Ytterbium-166)Nuclide mass:165.8954769 u (calculated nuclear mass without electrons)Mass excess:-61.59597 MeVMass defect:1.445710176 u (per nucleus)Nuclear binding energy:1346.67035468 MeV (per nucleus) 8.11247202 MeV (average binding energy per nucleon)Separation energy:SN = 9.372(27) MeV (first neutron) SP = 5.955(7) MeV (first proton)Half-life:56.7(1) hDecay constant λ:3.395782777581 × 10-6 s-1Specific activity α:1.232411525387 × 10+16 Bq g-1 333084.19605068 Ci g-1Spin and parity: (nuclear angular momentum)0+Charge radius:5.2525(57) femtometer fmYear of discovery:1954
Radioactive Decay
Half-life T½ = 56.7(1) h (hours) respectively 2.04120 × 105 seconds s.
The following table shows the atomic nuclei that are isotonic (same neutron number N = 96) and isobaric (same nucleon number A = 166) with Ytterbium-166. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
