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Radionuclide Dosimetric Data Sheets
Indium-111
Summary data
General
Classification
Isotope: In-111
Atomic number (Z): 49
Mass number (A): 111
Neutron number (N): 62
Radioactive decay
Decay modes: Electron capture
Half-life: 2.805 [d]
Decay constant: 2.8604e-06 [1/s]
Daughters: Cd-111m (0.005%), Cd-111 (100.0%)
Radioactive daughters: Cd-111m
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.03481 [MeV]
Mean photon energy: 0.40611 [MeV]
Air kerma rate constant, Γ10: 2.137e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 2.137e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 5.577e-15 [Gy·kg/Bq·s]
Equilibrium dose constant for alphas, Δα: 0.000e+00
[Gy·kg/Bq·s]
Equilibrium dose constant for betas/electrons, Δβ-,β+,e-:
5.577e-15 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 6.507e-14
[Gy·kg/Bq·s]
Dose point kernels (plot)
Dose point kernel source: Graves, et al. Medical Physics. 2019 Nov.; 46(11):5284-5293.
Note: Bins are spaced every 0.1 mm until a radius of 10 cm, and every 1 mm until a radius of 2 m.
Download tabulated dose point kernel file here: www.mirdsoft.org/products/MIRDspecs/In-111 DPK.csv
Summary spectra (plot)
Spectra source: ICRP Publication 107: Nuclear Decay Data for Dosimetric Calculations. Ann. ICRP 2008, 38 (3).
Download tabulated summary spectra file here: www.mirdsoft.org/products/MIRDspecs/In-111 Summary Spectrum.csv
Tabulated data
Summary spectra (table)
Spectra source: ICRP Publication 107: Nuclear Decay Data for Dosimetric Calculations. Ann. ICRP 2008, 38 (3).
Note: Radiations with yield < 0.01 are excluded from the table, but are available in the linked *.csv data.
Download tabulated summary spectra file here: www.mirdsoft.org/products/MIRDspecs/In-111 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.71473e-05 |
8.595e+00 |
X-ray |
|
3.12254e-03 |
3.306e-02 |
X-ray |
|
3.31083e-03 |
1.688e-02 |
X-ray |
|
2.29571e-02 |
2.396e-01 |
X-ray |
|
2.31527e-02 |
4.503e-01 |
X-ray |
|
2.60401e-02 |
3.973e-02 |
X-ray |
|
2.60753e-02 |
7.718e-02 |
X-ray |
|
2.66158e-02 |
1.569e-02 |
X-ray |
|
1.71280e-01 |
9.065e-01 |
Gamma |
|
2.45350e-01 |
9.409e-01 |
Gamma |
|
3.67731e-05 |
3.037e+00 |
Auger electron |
|
1.28035e-04 |
8.856e-01 |
Auger electron |
|
1.66171e-04 |
1.903e-01 |
Auger electron |
|
3.45374e-04 |
2.117e+00 |
Auger electron |
|
4.03240e-04 |
2.411e-02 |
Auger electron |
|
2.61076e-03 |
8.158e-01 |
Auger electron |
|
3.05389e-03 |
1.878e-01 |
Auger electron |
|
3.51504e-03 |
1.138e-02 |
Auger electron |
|
1.92752e-02 |
1.063e-01 |
Auger electron |
|
2.24238e-02 |
4.374e-02 |
Auger electron |
|
1.44592e-01 |
8.509e-02 |
Conversion electron |
|
2.18662e-01 |
5.041e-02 |
Conversion electron |
Useful Links
Isotope decay characteristics are periodically updated as better measurements can be made - changes that may not be reflected on this page. Please see useful links:
National Nuclear Data Center (NNDC): https://www.nndc.bnl.gov/nudat3/mird/
International Atomic Energy Agency (IAEA) Livechart: https://www-nds.iaea.org/relnsd/vcharthtml/VChartHTML.html
Reference Links
ICRP Report 107: https://www.icrp.org/publication.asp?id=ICRP%20Publication%20107
Graves et al. Dose Point Kernels: https://doi.org/10.1002/mp.13789
MIRD Decay Schemes 2nd Edition: https://sites.snmmi.org/SNMMI-MAIN/iCore/Store/StoreLayouts/Item_Detail.aspx?iProductCode=0-932004-80-6
MIRDsoft MIRDspecs version 20250101 (www.mirdsoft.org)
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