See also: List of individual Cadmium isotopes (and general data sources).
General data
Name of the isotope:Cadmium-115m ; Cd-115mSymbol:115mCd or 115m48CdMass number A:115 (= number of nucleons)Atomic number Z:48 (= number of protons)Neutrons N:67Nucleon pairing (Z - N):even - oddNuclear ratio (N/Z ratio):1.3958333333333 (= neutron-proton ratio)Neutron excess (N-Z):19Excitation energy:181.0(5) keVIsotopic mass:114.9054374(7) u (atomic weight of Cadmium-115m )Nuclide mass:114.879107 u (calculated nuclear mass without electrons)Mass excess:-88.08449 MeVMass defect:1.050713508 u (per nucleus)Nuclear binding energy:978.73332842 MeV (per nucleus) 8.51072459 MeV (average binding energy per nucleon)Half-life:44.56(24) dDecay constant λ:1.80038976930 × 10-7 s-1Specific activity α:9.435759402658 × 10+14 Bq g-1 25502.052439618 Ci g-1Spin and parity: (nuclear angular momentum)(11/2)-Magnetic dipole moment:μ(μN) = -1.0394(6)Quadrupole moment Q:-0.54(5) barn (100 fm2)Nuclear g-factor:gl = -0.18898181818182
Radioactive Decay
Half-life T½ = 44.56(24) d respectively 3.849984 × 106 seconds s.
Decay mode
Daughter
Probability
Decay energy
γ energy (intensity)
β-
115In
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 = 67) and isobaric (same nucleon number A = 115) with Cadmium-115m . Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
