See also: List of individual Iodine isotopes (and general data sources).
General data
Name of the isotope:Iodine-132m; I-132mOther names:Jod-132mSymbol:132mI or 132m53IMass number A:132 (= number of nucleons)Atomic number Z:53 (= number of protons)Neutrons N:79Nucleon pairing (Z - N):odd - oddNuclear ratio (N/Z ratio):1.4905660377358 (= neutron-proton ratio)Neutron excess (N-Z):26Excitation energy:120(20) keVIsotopic mass:131.907994(4) u (atomic weight of Iodine-132m)Nuclide mass:131.8789211 u (calculated nuclear mass without electrons)Mass excess:-85.70304 MeVMass defect:1.19126106 u (per nucleus)Nuclear binding energy:1109.65252982 MeV (per nucleus) 8.40645856 MeV (average binding energy per nucleon)Half-life:1.387(15) hDecay constant λ:0.0001388182289033 s-1Specific activity α:6.337621315881 × 10+17 Bq g-1 17128706.259139 Ci g-1Spin and parity: (nuclear angular momentum)(8-)
Radioactive Decay
Half-life T½ = 1.387(15) h (hours) respectively 4.9932 × 103 seconds s.
Decay mode
Daughter
Probability
Decay energy
γ energy (intensity)
β-
132Xe
14(2) %
Iso
132I
86(2) %
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 = 79) and isobaric (same nucleon number A = 132) with Iodine-132m. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
