See also: List of individual Osmium isotopes (and general data sources).
General data
Name of the isotope:Osmium-192m; Os-192mSymbol:192mOs or 192m76OsMass number A:192 (= number of nucleons)Atomic number Z:76 (= number of protons)Neutrons N:116Nucleon pairing (Z - N):even - evenNuclear ratio (N/Z ratio):1.5263157894737 (= neutron-proton ratio)Neutron excess (N-Z):40Excitation energy:2015.40(11) keVIsotopic mass:191.96148(2) u (atomic weight of Osmium-192m)Nuclide mass:191.9197922 u (calculated nuclear mass without electrons)Mass excess:-35.88115 MeVMass defect:1.638352688 u (per nucleus)Nuclear binding energy:1526.11569876 MeV (per nucleus) 7.94851926 MeV (average binding energy per nucleon)Half-life:5.9(1) sDecay constant λ:0.11748257297626 s-1Specific activity α:3.68561750675 × 10+20 Bq g-1 9961128396.627 Ci g-1Spin and parity: (nuclear angular momentum)(10-)
Radioactive Decay
Half-life T½ = 5.9(1) s.
Decay mode
Daughter
Probability
Decay energy
γ energy (intensity)
β-
192Ir
< 13 %
Iso
192Os
> 87 %
Nuclear Isomers
Nuclear isomers or excited states with the activation energy in keV related to the ground state.
The following table shows the atomic nuclei that are isotonic (same neutron number N = 116) and isobaric (same nucleon number A = 192) with Osmium-192m. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
