See also: List of individual Cadmium isotopes (and general data sources).
General data
Name of the isotope:Cadmium-111m; Cd-111mSymbol:111mCd or 111m48CdMass number A:111 (= number of nucleons)Atomic number Z:48 (= number of protons)Neutrons N:63Nucleon pairing (Z - N):even - oddNuclear ratio (N/Z ratio):1.3125 (= neutron-proton ratio)Neutron excess (N-Z):15Excitation energy:396.214(21) keVIsotopic mass:110.904183(4) u (atomic weight of Cadmium-111m)Nuclide mass:110.8778526 u (calculated nuclear mass without electrons)Mass excess:-89.25296 MeVMass defect:1.017308244 u (per nucleus)Nuclear binding energy:947.61652544 MeV (per nucleus) 8.53708581 MeV (average binding energy per nucleon)Half-life:48.50(9) minDecay constant λ:0.00023819490740892 s-1Specific activity α:1.293407716399 × 10+18 Bq g-1 34956965.308092 Ci g-1Spin and parity: (nuclear angular momentum)11/2-Magnetic dipole moment:μ(μN) = -1.1051(4)Quadrupole moment Q:-0.75(3) barn (100 fm2)Nuclear g-factor:gl = -0.20092727272727
Radioactive Decay
Half-life T½ = 48.50(9) min (minutes) respectively 2.910 × 103 seconds s.
Decay mode
Daughter
Probability
Decay energy
γ energy (intensity)
Iso
111Cd
100 %
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 = 63) and isobaric (same nucleon number A = 111) with Cadmium-111m. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
