Iodine-113
Properties and data of the isotope 113I.
Iodine-113 is a radioisotope of the chemical element iodine, which has 60 neutrons in its atomic nucleus in addition to the element-specific 53 protons; the sum of the number of these atomic nucleus building blocks results in a mass number of 113. The very short-lived, only artificially produced, unstable and thus radioactive nuclide has no practical significance; the study of 113I is exclusively for academic purposes.
See also: List of individual Iodine isotopes (and general data sources).
General data
Name of the isotope:Iodine-113; I-113Other names:Jod-113Symbol:113I or 11353IMass number A:113 (= number of nucleons)Atomic number Z:53 (= number of protons)Neutrons N:60Nucleon pairing (Z - N):odd - evenNuclear ratio (N/Z ratio):1.1320754716981 (= neutron-proton ratio)Neutron excess (N-Z):7Isotopic mass:112.923650(9) u (atomic weight of Iodine-113)Nuclide mass:112.8945771 u (calculated nuclear mass without electrons)Mass excess:-71.11957 MeVMass defect:1.010971656 u (per nucleus)Nuclear binding energy:941.71403173 MeV (per nucleus)
8.33375249 MeV (average binding energy per nucleon)Separation energy:SN = 12.127(13) MeV (first neutron)
SP = 0.841(12) MeV (first proton)Half-life:6.6(2) sDecay constant λ:0.10502230008484 s-1Specific activity α:5.64695611201 × 10+20 Bq g-1
15262043545.981 Ci g-1Spin and parity:
(nuclear angular momentum)5/2+Year of discovery:1977
Radioactive Decay
Half-life T½ = 6.6(2) s.
Decay
mode | Daughter | Probability | Decay energy | γ energy
(intensity) |
|---|
| α | 109Sb | rare | 2.707(10) MeV | |
| EC/β+ | 113Te | ~100 % | 7.228(29) MeV | |
Parent Nuclides
Direct parent isotope is: 114Cs.
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 60) and isobaric (same nucleon number A = 113) with Iodine-113. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
| Z | Isotone N = 60 | Isobar A = 113 |
|---|
| 34 | 94Se | |
| 35 | 95Br | |
| 36 | 96Kr | |
| 37 | 97Rb | |
| 38 | 98Sr | |
| 39 | 99Y | |
| 40 | 100Zr | |
| 41 | 101Nb | 113Nb |
| 42 | 102Mo | 113Mo |
| 43 | 103Tc | 113Tc |
| 44 | 104Ru | 113Ru |
| 45 | 105Rh | 113Rh |
| 46 | 106Pd | 113Pd |
| 47 | 107Ag | 113Ag |
| 48 | 108Cd | 113Cd |
| 49 | 109In | 113In |
| 50 | 110Sn | 113Sn |
| 51 | 111Sb | 113Sb |
| 52 | 112Te | 113Te |
| 53 | 113I | 113I |
| 54 | 114Xe | 113Xe |
| 55 | 115Cs | 113Cs |
| 56 | 116Ba | |
| 57 | 117La | |
External data and identifiers
Last update: 2024-09-04
Perma link: https://www.chemlin.org/isotope/iodine-113
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