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Radionuclide Dosimetric Data Sheets
Terbium-158
Summary data
General
Classification
Isotope: Tb-158
Atomic number (Z): 65
Mass number (A): 158
Neutron number (N): 93
Radioactive decay
Decay modes: β-, Electron capture
Half-life: 180.0 [y]
Decay constant: 1.2203e-10 [1/s]
Daughters: Gd-158 (83.4%), Dy-158 (16.6%)
Radioactive daughters: None
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.11165 [MeV]
Mean photon energy: 0.80481 [MeV]
Air kerma rate constant, Γ10: 3.001e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 3.001e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 1.789e-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-:
1.789e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 1.289e-13
[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/Tb-158 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/Tb-158 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/Tb-158 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/Tb-158 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.36933e-05 |
1.005e+00 |
X-ray |
|
1.94331e-05 |
1.378e+01 |
X-ray |
|
1.09539e-03 |
2.094e-02 |
X-ray |
|
6.01111e-03 |
1.035e-02 |
X-ray |
|
6.04290e-03 |
9.157e-02 |
X-ray |
|
6.71540e-03 |
6.734e-02 |
X-ray |
|
7.08639e-03 |
1.557e-02 |
X-ray |
|
7.78484e-03 |
1.183e-02 |
X-ray |
|
4.23559e-02 |
2.296e-01 |
X-ray |
|
4.30603e-02 |
4.129e-01 |
X-ray |
|
4.52703e-02 |
1.354e-02 |
X-ray |
|
4.60801e-02 |
2.420e-02 |
X-ray |
|
4.86161e-02 |
4.196e-02 |
X-ray |
|
4.87612e-02 |
8.115e-02 |
X-ray |
|
5.00239e-02 |
1.790e-02 |
X-ray |
|
7.95130e-02 |
1.163e-01 |
Gamma |
|
9.89180e-02 |
4.295e-02 |
Gamma |
|
1.81944e-01 |
9.914e-02 |
Gamma |
|
7.80183e-01 |
9.563e-02 |
Gamma |
|
9.44189e-01 |
4.387e-01 |
Gamma |
|
9.62126e-01 |
2.027e-01 |
Gamma |
|
1.10763e+00 |
2.145e-02 |
Gamma |
|
1.18714e+00 |
1.685e-02 |
Gamma |
|
1.93196e-01 |
1.100e-02 |
Beta |
|
2.74601e-01 |
1.550e-01 |
Beta |
|
1.68638e-05 |
9.267e-01 |
Auger electron |
|
1.81686e-05 |
5.495e-02 |
Auger electron |
|
1.13381e-04 |
6.201e+00 |
Auger electron |
|
1.23753e-04 |
5.132e-01 |
Auger electron |
|
1.28595e-04 |
4.586e-01 |
Auger electron |
|
1.52865e-04 |
2.260e-02 |
Auger electron |
|
1.83495e-04 |
9.819e-01 |
Auger electron |
|
2.11335e-04 |
7.293e-02 |
Auger electron |
|
5.69329e-04 |
1.981e-01 |
Auger electron |
|
6.22635e-04 |
1.014e-02 |
Auger electron |
|
8.98630e-04 |
2.079e+00 |
Auger electron |
|
1.01685e-03 |
1.626e-01 |
Auger electron |
|
1.07712e-03 |
1.413e-01 |
Auger electron |
|
4.78706e-03 |
7.564e-01 |
Auger electron |
|
5.12315e-03 |
5.737e-02 |
Auger electron |
|
5.94388e-03 |
2.655e-01 |
Auger electron |
|
6.38313e-03 |
2.018e-02 |
Auger electron |
|
7.13576e-03 |
2.308e-02 |
Auger electron |
|
2.92100e-02 |
2.324e-01 |
Conversion electron |
|
3.47387e-02 |
3.582e-02 |
Auger electron |
|
4.11460e-02 |
1.774e-02 |
Auger electron |
|
4.50570e-02 |
4.899e-02 |
Conversion electron |
|
7.11632e-02 |
2.088e-02 |
Conversion electron |
|
7.15660e-02 |
1.618e-01 |
Conversion electron |
|
7.22703e-02 |
1.756e-01 |
Conversion electron |
|
7.79712e-02 |
8.478e-02 |
Conversion electron |
|
7.95130e-02 |
2.239e-02 |
Conversion electron |
|
9.03273e-02 |
2.589e-02 |
Conversion electron |
|
9.11370e-02 |
2.583e-02 |
Conversion electron |
|
9.72559e-02 |
1.349e-02 |
Conversion electron |
|
1.31641e-01 |
2.042e-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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