See also: List of individual Osmium isotopes (and general data sources).
General data
Name of the isotope:Osmium-183; Os-183Symbol:183Os or 18376OsMass number A:183 (= number of nucleons)Atomic number Z:76 (= number of protons)Neutrons N:107Nucleon pairing (Z - N):even - oddNuclear ratio (N/Z ratio):1.4078947368421 (= neutron-proton ratio)Neutron excess (N-Z):31Isotopic mass:182.95312(5) u (atomic weight of Osmium-183)Nuclide mass:182.9114322 u (calculated nuclear mass without electrons)Mass excess:-43.66844 MeVMass defect:1.568728444 u (per nucleus)Nuclear binding energy:1461.26113322 MeV (per nucleus) 7.98503351 MeV (average binding energy per nucleon)Separation energy:SN = 7.13(5) MeV (first neutron) SP = 5.51(11) MeV (first proton)Half-life:13.0(5) hDecay constant λ:1.481083719145 × 10-5 s-1Specific activity α:4.875180392680 × 10+16 Bq g-1 1317616.322346 Ci g-1Spin and parity: (nuclear angular momentum)9/2+Magnetic dipole moment:μ(μN) = -0.794(14)Quadrupole moment Q:+3.12(27) barn (100 fm2)Nuclear g-factor:gl = -0.17644444444444Year of discovery:1950
Radioactive Decay
Half-life T½ = 13.0(5) h (hours) respectively 4.6800 × 104 seconds s.
The following table shows the atomic nuclei that are isotonic (same neutron number N = 107) and isobaric (same nucleon number A = 183) with Osmium-183. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
