Indium-117
Properties and data of the isotope 117In.
See also: List of individual Indium isotopes (and general data sources).
General data
Name of the isotope:Indium-117; In-117Symbol:117In or 11749InMass number A:117 (= number of nucleons)Atomic number Z:49 (= number of protons)Neutrons N:68Nucleon pairing (Z - N):odd - evenNuclear ratio (N/Z ratio):1.3877551020408 (= neutron-proton ratio)Neutron excess (N-Z):19Isotopic mass:116.904516(5) u (atomic weight of Indium-117)Nuclide mass:116.8776371 u (calculated nuclear mass without electrons)Mass excess:-88.94277 MeVMass defect:1.068124856 u (per nucleus)Nuclear binding energy:994.95189461 MeV (per nucleus)
8.50386235 MeV (average binding energy per nucleon)Separation energy:SN = 8.765(5) MeV (first neutron)
SP = 7.520(5) MeV (first proton)Half-life:43.2(3) minDecay constant λ:0.00026741789373455 s-1Specific activity α:1.388300193566 × 10+18 Bq g-1
37521626.853146 Ci g-1Spin and parity:
(nuclear angular momentum)9/2+Magnetic dipole moment:μ(μN) = + 5.511(4)Quadrupole moment Q:+0.829(10) barn (100 fm2)Nuclear g-factor:gl = 1.2246666666667Charge radius:4.6292(32) femtometer fmYear of discovery:1937
Radioactive Decay
Half-life T½ = 43.2(3) min (minutes) respectively 2.592 × 103 seconds s.
Decay
mode | Daughter | Probability | Decay energy | γ energy
(intensity) |
|---|
| β- | 117Sn | 100 % | 1.1.455(5) MeV | |
Parent Nuclides
Direct parent isotope is: 117Cd.
Nuclear Isomers
Nuclear isomers or excited states with the activation energy in keV related to the ground state.
| Nuclear Isomer | Excitation Energy | Half-life | Spin |
|---|
| 117mIn | 315.303(11) keV | 116.2(3) min | 1/2- |
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 68) and isobaric (same nucleon number A = 117) with Indium-117. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
| Z | Isotone N = 68 | Isobar A = 117 |
|---|
| 38 | 106Sr | |
| 39 | 107Y | |
| 40 | 108Zr | |
| 41 | 109Nb | |
| 42 | 110Mo | 117Mo |
| 43 | 111Tc | 117Tc |
| 44 | 112Ru | 117Ru |
| 45 | 113Rh | 117Rh |
| 46 | 114Pd | 117Pd |
| 47 | 115Ag | 117Ag |
| 48 | 116Cd | 117Cd |
| 49 | 117In | 117In |
| 50 | 118Sn | 117Sn |
| 51 | 119Sb | 117Sb |
| 52 | 120Te | 117Te |
| 53 | 121I | 117I |
| 54 | 122Xe | 117Xe |
| 55 | 123Cs | 117Cs |
| 56 | 124Ba | 117Ba |
| 57 | 125La | 117La |
| 58 | 126Ce | |
| 59 | 127Pr | |
| 60 | 128Nd | |
| 61 | 129Pm | |
| 62 | 130Sm | |
| 63 | 131Eu | |
External data and identifiers
Last update: 2020-10-17
Perma link: https://www.chemlin.org/isotope/indium-117
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