See also: List of individual Iodine isotopes (and general data sources).
General data
Name of the isotope:Iodine-133m1; I-133m1Other names:Jod-133m1Symbol:133m1I or 133m153IMass number A:133 (= number of nucleons)Atomic number Z:53 (= number of protons)Neutrons N:80Nucleon pairing (Z - N):odd - evenNuclear ratio (N/Z ratio):1.5094339622642 (= neutron-proton ratio)Neutron excess (N-Z):27Excitation energy:1634.148(10) keVIsotopic mass:132.907827(7) u (atomic weight of Iodine-133m1)Nuclide mass:132.8787541 u (calculated nuclear mass without electrons)Mass excess:-85.8586 MeVMass defect:1.200092976 u (per nucleus)Nuclear binding energy:1117.87940659 MeV (per nucleus) 8.40510832 MeV (average binding energy per nucleon)Half-life:9(2) sDecay constant λ:0.077016353395549 s-1Specific activity α:3.489661455151 × 10+20 Bq g-1 9431517446.3565 Ci g-1Spin and parity: (nuclear angular momentum)(19/2-)
Radioactive Decay
Half-life T½ = 9(2) s.
Decay mode
Daughter
Probability
Decay energy
γ energy (intensity)
Iso
133I
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 = 80) and isobaric (same nucleon number A = 133) with Iodine-133m1. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
