See also: List of individual Manganese isotopes (and general data sources).
General data
Name of the isotope:Manganese-60m; Mn-60mSymbol:60mMn or 60m25MnMass number A:60 (= number of nucleons)Atomic number Z:25 (= number of protons)Neutrons N:35Nucleon pairing (Z - N):odd - oddNuclear ratio (N/Z ratio):1.4 (= neutron-proton ratio)Neutron excess (N-Z):10Excitation energy:271.8(1) keVIsotopic mass:59.9431366(25) u (atomic weight of Manganese-60m)Nuclide mass:59.9294224 u (calculated nuclear mass without electrons)Mass excess:-52.96792 MeVMass defect:0.55576126 u (per nucleus)Nuclear binding energy:517.68827912 MeV (per nucleus) 8.62813799 MeV (average binding energy per nucleon)Half-life:1.77(2) sDecay constant λ:0.39160857658754 s-1Specific activity α:3.934265213331 × 10+21 Bq g-1 106331492252.19 Ci g-1Spin and parity: (nuclear angular momentum)4+Magnetic dipole moment:μ(μN) = +3.400(2)Quadrupole moment Q:+0.33(10) barn (100 fm2)Nuclear g-factor:gl = 0.85Year of discovery:1978
Radioactive Decay
Half-life T½ = 1.77(2) s.
Decay mode
Daughter
Probability
Decay energy
γ energy (intensity)
β-
60Fe
88.5 %
Iso
60Mn
11.5 %
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 = 35) and isobaric (same nucleon number A = 60) with Manganese-60m. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
