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Radionuclide Dosimetric Data Sheets
Indium-112
Summary data
General
Classification
Isotope: In-112
Atomic number (Z): 49
Mass number (A): 112
Neutron number (N): 63
Radioactive decay
Decay modes: β-, β+, Electron capture
Half-life: 14.97 [m]
Decay constant: 7.7171e-04 [1/s]
Daughters: Cd-112 (56.0%), Sn-112 (44.0%)
Radioactive daughters: None
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.24517 [MeV]
Mean photon energy: 0.26749 [MeV]
Air kerma rate constant, Γ10: 3.991e-18 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 1.231e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 3.928e-14 [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-:
3.928e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 4.286e-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-112 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-112 Summary Spectrum.csv
Beta spectra (plot)
Spectra source: ICRP Publication 107: Nuclear Decay Data for Dosimetric Calculations. Ann. ICRP 2008, 38 (3).
Download tabulated beta spectra file here: www.mirdsoft.org/products/MIRDspecs/In-112 Beta 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-112 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.71475e-05 |
2.562e+00 |
X-ray |
|
2.29571e-02 |
7.233e-02 |
X-ray |
|
2.31527e-02 |
1.360e-01 |
X-ray |
|
2.60401e-02 |
1.200e-02 |
X-ray |
|
2.60753e-02 |
2.330e-02 |
X-ray |
|
5.11000e-01 |
4.298e-01 |
Annihilation photon |
|
6.06400e-01 |
1.111e-02 |
Gamma |
|
6.17100e-01 |
4.648e-02 |
Gamma |
|
2.13998e-01 |
4.400e-01 |
Beta |
|
6.97354e-01 |
2.111e-01 |
Positron |
|
3.67762e-05 |
9.051e-01 |
Auger electron |
|
1.28083e-04 |
2.639e-01 |
Auger electron |
|
1.65966e-04 |
5.568e-02 |
Auger electron |
|
3.45346e-04 |
6.317e-01 |
Auger electron |
|
2.61028e-03 |
2.437e-01 |
Auger electron |
|
3.05330e-03 |
5.610e-02 |
Auger electron |
|
1.92752e-02 |
3.210e-02 |
Auger electron |
|
2.24238e-02 |
1.321e-02 |
Auger 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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