See also: List of individual Silver isotopes (and general data sources).
General data
Name of the isotope:Silver-108m; Ag-108mSymbol:108mAg or 108m47AgMass number A:108 (= number of nucleons)Atomic number Z:47 (= number of protons)Neutrons N:61Nucleon pairing (Z - N):odd - oddNuclear ratio (N/Z ratio):1.2978723404255 (= neutron-proton ratio)Neutron excess (N-Z):14Excitation energy:109.466(7) keVIsotopic mass:107.9059503(26) u (atomic weight of Silver-108m)Nuclide mass:107.8801684 u (calculated nuclear mass without electrons)Mass excess:-87.60673 MeVMass defect:0.99038608000001 u (per nucleus)Nuclear binding energy:922.5386912 MeV (per nucleus) 8.54202492 MeV (average binding energy per nucleon)Half-life:438(9) yearsDecay constant λ:5.019168577552 × 10-11 s-1Specific activity α:280115596852.19 Bq g-1 7.5706918068159 Ci g-1Spin and parity: (nuclear angular momentum)6+Magnetic dipole moment:μ(μN) = 3.58(2)Quadrupole moment Q:+1.32(7) barn (100 fm2)Nuclear g-factor:gl = 0.59666666666667
Radioactive Decay
Half-life T½ = 438(9) years respectively 1.381 × 1010 seconds s.
Decay mode
Daughter
Probability
Decay energy
γ energy (intensity)
EC/β+
108Pd
91.3(9) %
Iso
108Ag
8.7(9) %
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 = 61) and isobaric (same nucleon number A = 108) with Silver-108m. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
