See also: List of individual Iodine isotopes (and general data sources).
General data
Name of the isotope:Iodine-140; I-140Other names:Jod-140Symbol:140I or 14053IMass number A:140 (= number of nucleons)Atomic number Z:53 (= number of protons)Neutrons N:87Nucleon pairing (Z - N):odd - oddNuclear ratio (N/Z ratio):1.6415094339623 (= neutron-proton ratio)Neutron excess (N-Z):34Isotopic mass:139.931716(13) u (atomic weight of Iodine-140)Nuclide mass:139.9026431 u (calculated nuclear mass without electrons)Mass excess:-63.60614 MeVMass defect:1.236858388 u (per nucleus)Nuclear binding energy:1152.12616727 MeV (per nucleus) 8.22947262 MeV (average binding energy per nucleon)Separation energy:SN = 3.207(13) MeV (first neutron) SP = 10.690(13) MeV (first proton)Half-life:0.86(4) sDecay constant λ:0.80598509367436 s-1Specific activity α:3.468660160337 × 10+21 Bq g-1 93747571901.016 Ci g-1Spin and parity: (nuclear angular momentum)(4-)Year of discovery:1972
Radioactive Decay
Half-life T½ = 0.86(4) s respectively 8.6 × 10-1 seconds s.
The following table shows the atomic nuclei that are isotonic (same neutron number N = 87) and isobaric (same nucleon number A = 140) with Iodine-140. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
