Indium-115
Properties and data of the isotope 115In.
See also: list of Indium isotopes.
General data
Name of the isotope:Indium-115; In-115Symbol:115In or 11549InMass number A:115 (= number of nucleons)Atomic number Z:49 (= number of protons)Neutrons N:66Isotopic mass:114.903878773(12) u (atomic weight of Indium-115)Nuclide mass:114.8769999 u (calculated nuclear mass without electrons)Mass excess:-89.53635 MeVMass defect:1.051432251 u (per nucleus)Nuclear binding energy:979.40283321 MeV (per nucleus)
8.51654638 MeV (average binding energy per nucleon)Separation energy:SN = 9.0379(3) MeV (first neutron)
SP = 6.81038(28) MeV (first proton)Half-life:4.41(25) × 1014 aDecay constant λ:4.98402560310 × 10-23 s-1Specific activity α:0.26328512483705 Bq g-1
7.115814184785 × 10-12 Ci g-1Spin and parity:
(nuclear angular momentum)9/2+Magnetic dipole moment:μ(μN) = +5.5326(4)Charge radius:4.6156(26) femtometer fmYear of discovery:1924
Radioactive Decay
Half-life T½ = 4.41(25) × 1014 a respectively 1.3907376 × 1022 seconds s.
Decay
mode | Daughter | Probability | Decay energy | γ energy
(intensity) |
|---|
| β- | 115Sn | 100 % | 0.497489(10) MeV | |
Parent Nuclides
Direct parent isotope is: 115Cd.
Occurrence
Comparison of the natural Indium isotopes including isotopic abundance (mole fraction of the isotope mixture in percent):
| | Atomic Mass ma | Quantity | Half-life | Spin |
|---|
Indium
Isotopic mixture | 114.818 u | 100 % | | |
| Isotope 113In | 112.904062(6) u | 4.281(52) % | stable | 9/2+ |
| Isotope 115In | 114.903878773(12) u | 95.719(52) % | 4.41(25) × 1014 a | 9/2+ |
NMR data
Nuclear magnetic properties of the NMR active Nuclide 115In
Isotope:115In-NMRQuantity:95.719(52) %Spin:9/2+Nuclearmagnetic moment
μ/μN:+5.5326(4)Gyromagnetic ratio γ:5.8971 · 107 rad T-1 s-1Nuclear g-factor:gl = 1.2294666666667Quadrupole moment Q:+ 0.772(5) barn (100 fm2)Resonance frequency:v0 = 9.3856 at 1 TRelative Sensitivity:0.35348 (H0 = const.)
7.2745 (v0 = const.)
[related to 1H = 1.000]
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 |
|---|
| 115mIn | 336.244(17) keV | 4.486(4) h | 1/2- |
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 66) and isobaric (same nucleon number A = 115) with Indium-115. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
| Z | Isotone N = 66 | Isobar A = 115 |
|---|
| 37 | 103Rb | |
| 38 | 104Sr | |
| 39 | 105Y | |
| 40 | 106Zr | |
| 41 | 107Nb | 115Nb |
| 42 | 108Mo | 115Mo |
| 43 | 109Tc | 115Tc |
| 44 | 110Ru | 115Ru |
| 45 | 111Rh | 115Rh |
| 46 | 112Pd | 115Pd |
| 47 | 113Ag | 115Ag |
| 48 | 114Cd | 115Cd |
| 49 | 115In | 115In |
| 50 | 116Sn | 115Sn |
| 51 | 117Sb | 115Sb |
| 52 | 118Te | 115Te |
| 53 | 119I | 115I |
| 54 | 120Xe | 115Xe |
| 55 | 121Cs | 115Cs |
| 56 | 122Ba | 115Ba |
| 57 | 123La | |
| 58 | 124Ce | |
| 59 | 125Pr | |
| 60 | 126Nd | |
| 61 | 127Pm | |
| 62 | 128Sm | |
External data and identifiers
Last update: 2020-10-16
Perma link: https://www.chemlin.org/isotope/indium-115
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