See also: List of individual Silver isotopes (and general data sources).
General data
Name of the isotope:Silver-111m; Ag-111mSymbol:111mAg or 111m47AgMass number A:111 (= number of nucleons)Atomic number Z:47 (= number of protons)Neutrons N:64Nucleon pairing (Z - N):odd - evenNuclear ratio (N/Z ratio):1.3617021276596 (= neutron-proton ratio)Neutron excess (N-Z):17Excitation energy:59.82(4) keVIsotopic mass:110.9052968(16) u (atomic weight of Silver-111m)Nuclide mass:110.8795149 u (calculated nuclear mass without electrons)Mass excess:-88.21546 MeVMass defect:1.017034328 u (per nucleus)Nuclear binding energy:947.36137433 MeV (per nucleus) 8.53478716 MeV (average binding energy per nucleon)Half-life:64.8(8) sDecay constant λ:0.010696715749382 s-1Specific activity α:5.808300394223 × 10+19 Bq g-1 1569810917.3576 Ci g-1Spin and parity: (nuclear angular momentum)7/2+
Radioactive Decay
Half-life T½ = 64.8(8) s respectively 6.48 × 101 seconds s.
Decay mode
Daughter
Probability
Decay energy
γ energy (intensity)
β-
111Cd
0.7(2) %
Iso
111Ag
99.3(2) %
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 = 64) and isobaric (same nucleon number A = 111) with Silver-111m. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
