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Radionuclide Dosimetric Data Sheets
Terbium-147
Summary data
General
Classification
Isotope: Tb-147
Atomic number (Z): 65
Mass number (A): 147
Neutron number (N): 82
Radioactive decay
Decay modes: β+, Electron capture
Half-life: 1.64 [h]
Decay constant: 1.1740e-04 [1/s]
Daughters: Gd-147 (100.0%)
Radioactive daughters: Gd-147
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.28101 [MeV]
Mean photon energy: 2.18449 [MeV]
Air kerma rate constant, Γ10: 6.629e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 7.690e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 4.502e-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-:
4.502e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 3.500e-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-147 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-147 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-147 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-147 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.94293e-05 |
7.585e+00 |
X-ray |
|
1.09475e-03 |
1.156e-02 |
X-ray |
|
6.04290e-03 |
5.329e-02 |
X-ray |
|
6.71540e-03 |
3.436e-02 |
X-ray |
|
4.23559e-02 |
1.899e-01 |
X-ray |
|
4.30603e-02 |
3.415e-01 |
X-ray |
|
4.86161e-02 |
3.470e-02 |
X-ray |
|
4.87612e-02 |
6.711e-02 |
X-ray |
|
5.00239e-02 |
1.480e-02 |
X-ray |
|
1.19700e-01 |
6.100e-02 |
Gamma |
|
1.39800e-01 |
2.746e-01 |
Gamma |
|
3.47400e-01 |
2.400e-02 |
Gamma |
|
4.07000e-01 |
1.900e-02 |
Gamma |
|
4.34800e-01 |
1.000e-02 |
Gamma |
|
5.11000e-01 |
5.483e-01 |
Annihilation photon |
|
5.47200e-01 |
2.800e-02 |
Gamma |
|
5.54700e-01 |
5.100e-02 |
Gamma |
|
6.94400e-01 |
4.300e-01 |
Gamma |
|
1.15220e+00 |
1.000e+00 |
Gamma |
|
1.62790e+00 |
3.700e-02 |
Gamma |
|
1.62810e+00 |
3.700e-02 |
Gamma |
|
1.94830e+00 |
1.900e-02 |
Gamma |
|
2.56190e+00 |
2.300e-02 |
Gamma |
|
2.68140e+00 |
3.600e-02 |
Gamma |
|
7.86025e-01 |
9.784e-02 |
Positron |
|
8.52145e-01 |
1.098e-02 |
Positron |
|
9.81809e-01 |
3.395e-02 |
Positron |
|
1.03606e+00 |
3.594e-02 |
Positron |
|
1.09960e+00 |
8.986e-02 |
Positron |
|
1.68638e-05 |
5.097e-01 |
Auger electron |
|
1.13381e-04 |
3.412e+00 |
Auger electron |
|
1.23637e-04 |
2.806e-01 |
Auger electron |
|
1.82282e-04 |
5.328e-01 |
Auger electron |
|
5.72388e-04 |
1.072e-01 |
Auger electron |
|
8.97929e-04 |
1.150e+00 |
Auger electron |
|
1.07577e-03 |
7.806e-02 |
Auger electron |
|
4.77150e-03 |
4.228e-01 |
Auger electron |
|
5.92752e-03 |
1.483e-01 |
Auger electron |
|
7.11820e-03 |
1.288e-02 |
Auger electron |
|
3.47387e-02 |
2.962e-02 |
Auger electron |
|
4.11460e-02 |
1.467e-02 |
Auger electron |
|
6.93970e-02 |
6.389e-02 |
Conversion electron |
|
8.94970e-02 |
2.756e-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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