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Radionuclide Dosimetric Data Sheets
Indium-114m
Summary data
General
Classification
Isotope: In-114m
Atomic number (Z): 49
Mass number (A): 114
Neutron number (N): 65
Radioactive decay
Decay modes: Electron capture, Internal transition
Half-life: 49.51 [d]
Decay constant: 1.6204e-07 [1/s]
Daughters: In-114 (96.8%), Cd-114 (3.25%)
Radioactive daughters: In-114
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.145 [MeV]
Mean photon energy: 0.08041 [MeV]
Air kerma rate constant, Γ10: 5.787e-18 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 5.787e-18 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 2.323e-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-:
2.323e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 1.288e-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-114m 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-114m 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-114m Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
8.13203e-06 |
1.060e+01 |
X-ray |
|
1.71471e-05 |
2.431e-01 |
X-ray |
|
3.27540e-03 |
2.037e-02 |
X-ray |
|
3.48147e-03 |
1.587e-02 |
X-ray |
|
2.31527e-02 |
1.266e-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 |
|
1.90270e-01 |
1.556e-01 |
Gamma |
|
5.58430e-01 |
3.242e-02 |
Gamma |
|
7.25240e-01 |
3.242e-02 |
Gamma |
|
8.84501e-06 |
5.260e+00 |
Auger electron |
|
3.36377e-05 |
1.831e+00 |
Auger electron |
|
3.67688e-05 |
8.595e-02 |
Auger electron |
|
1.27610e-04 |
5.712e-01 |
Auger electron |
|
1.27964e-04 |
2.507e-02 |
Auger electron |
|
2.22445e-04 |
8.132e-02 |
Auger electron |
|
3.45409e-04 |
5.984e-02 |
Auger electron |
|
3.70307e-04 |
1.321e+00 |
Auger electron |
|
4.33774e-04 |
2.153e-02 |
Auger electron |
|
2.61115e-03 |
2.303e-02 |
Auger electron |
|
2.73402e-03 |
5.193e-01 |
Auger electron |
|
3.21253e-03 |
1.268e-01 |
Auger electron |
|
2.00957e-02 |
3.994e-02 |
Auger electron |
|
2.34091e-02 |
1.672e-02 |
Auger electron |
|
1.62349e-01 |
3.978e-01 |
Conversion electron |
|
1.86056e-01 |
3.724e-02 |
Conversion electron |
|
1.86328e-01 |
1.605e-01 |
Conversion electron |
|
1.86542e-01 |
1.277e-01 |
Conversion electron |
|
1.89609e-01 |
6.924e-02 |
Conversion electron |
|
1.90270e-01 |
1.318e-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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