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Radionuclide Dosimetric Data Sheets
Indium-115m
Summary data
General
Classification
Isotope: In-115m
Atomic number (Z): 49
Mass number (A): 115
Neutron number (N): 66
Radioactive decay
Decay modes: β-, Internal transition
Half-life: 4.486 [h]
Decay constant: 4.2920e-05 [1/s]
Daughters: In-115 (95.0%), Sn-115 (5.0%)
Radioactive daughters: In-115
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.17484 [MeV]
Mean photon energy: 0.16272 [MeV]
Air kerma rate constant, Γ10: 8.729e-18 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 8.729e-18 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 2.801e-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-:
2.801e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 2.607e-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-115m 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-115m 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-115m 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-115m Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
8.12539e-06 |
7.046e+00 |
X-ray |
|
3.27540e-03 |
1.418e-02 |
X-ray |
|
2.39785e-02 |
9.774e-02 |
X-ray |
|
2.41926e-02 |
1.834e-01 |
X-ray |
|
2.72214e-02 |
1.636e-02 |
X-ray |
|
2.72603e-02 |
3.177e-02 |
X-ray |
|
3.36241e-01 |
4.579e-01 |
Gamma |
|
2.79276e-01 |
4.953e-02 |
Beta |
|
8.85906e-06 |
3.494e+00 |
Auger electron |
|
3.35253e-05 |
1.229e+00 |
Auger electron |
|
1.25689e-04 |
3.832e-01 |
Auger electron |
|
2.63951e-04 |
6.831e-02 |
Auger electron |
|
3.70891e-04 |
8.638e-01 |
Auger electron |
|
4.37093e-04 |
1.421e-02 |
Auger electron |
|
2.73514e-03 |
3.420e-01 |
Auger electron |
|
3.21558e-03 |
8.363e-02 |
Auger electron |
|
2.00957e-02 |
3.994e-02 |
Auger electron |
|
2.34091e-02 |
1.672e-02 |
Auger electron |
|
3.08320e-01 |
3.978e-01 |
Conversion electron |
|
3.32027e-01 |
5.928e-02 |
Conversion electron |
|
3.32299e-01 |
1.020e-02 |
Conversion electron |
|
3.32513e-01 |
1.565e-02 |
Conversion electron |
|
3.35580e-01 |
1.750e-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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