See also: List of individual Iron isotopes (and general data sources).
General data
Name of the isotope:Iron-54m; Fe-54mSymbol:54mFe or 54m26FeMass number A:54 (= number of nucleons)Atomic number Z:26 (= number of protons)Neutrons N:28Nucleon pairing (Z - N):even - evenNuclear ratio (N/Z ratio):1.0769230769231 (= neutron-proton ratio)Neutron excess (N-Z):2Excitation energy:6527.1(11) keVIsotopic mass:53.9396082(4) u (atomic weight of Iron-54m)Nuclide mass:53.9253455 u (calculated nuclear mass without electrons)Mass excess:-56.2546 MeVMass defect:0.50646028 u (per nucleus)Nuclear binding energy:471.76471206 MeV (per nucleus) 8.73638356 MeV (average binding energy per nucleon)Half-life:364(7) nsDecay constant λ:1904250.4960438 s-1Specific activity α:2.126019248592 × 10+28 Bq g-1 5.745997969169 × 10+17 Ci g-1Spin and parity: (nuclear angular momentum)10+Magnetic dipole moment:μ(μN) = +7.281(10)Quadrupole moment Q:0.30(4) barn (100 fm2)Nuclear g-factor:gl = 0.7281Year of discovery:1983
The following table shows the atomic nuclei that are isotonic (same neutron number N = 28) and isobaric (same nucleon number A = 54) with Iron-54m. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
