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Radionuclide Dosimetric Data Sheets
Terbium-151
Summary data
General
Classification
Isotope: Tb-151
Atomic number (Z): 65
Mass number (A): 151
Neutron number (N): 86
Radioactive decay
Decay modes: α, β+, Electron capture
Half-life: 17.61 [h]
Decay constant: 1.0934e-05 [1/s]
Daughters: Gd-151 (100.0%), Eu-147 (0.0095%)
Radioactive daughters: Gd-151, Eu-147
Dosimetric constants
Mean alpha energy: 0.0003 [MeV]
Mean electron energy: 0.07996 [MeV]
Mean photon energy: 0.99413 [MeV]
Air kerma rate constant, Γ10: 3.731e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 3.773e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 1.286e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for alphas, Δα: 4.807e-17
[Gy·kg/Bq·s]
Equilibrium dose constant for betas/electrons, Δβ-,β+,e-:
1.281e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 1.593e-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-151 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-151 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-151 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-151 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.94291e-05 |
1.408e+01 |
X-ray |
|
1.09469e-03 |
2.150e-02 |
X-ray |
|
6.01111e-03 |
1.113e-02 |
X-ray |
|
6.04290e-03 |
9.847e-02 |
X-ray |
|
6.71540e-03 |
6.541e-02 |
X-ray |
|
7.08640e-03 |
1.674e-02 |
X-ray |
|
7.78484e-03 |
1.149e-02 |
X-ray |
|
4.23559e-02 |
3.346e-01 |
X-ray |
|
4.30603e-02 |
6.015e-01 |
X-ray |
|
4.86161e-02 |
6.113e-02 |
X-ray |
|
4.87612e-02 |
1.182e-01 |
X-ray |
|
4.99916e-02 |
1.343e-02 |
X-ray |
|
5.00239e-02 |
2.608e-02 |
X-ray |
|
1.08088e-01 |
2.434e-01 |
Gamma |
|
1.80186e-01 |
1.152e-01 |
Gamma |
|
1.91960e-01 |
3.622e-02 |
Gamma |
|
2.51863e-01 |
2.632e-01 |
Gamma |
|
2.87357e-01 |
2.830e-01 |
Gamma |
|
3.80356e-01 |
4.811e-02 |
Gamma |
|
3.85156e-01 |
1.036e-02 |
Gamma |
|
3.95444e-01 |
1.075e-01 |
Gamma |
|
4.16390e-01 |
1.950e-02 |
Gamma |
|
4.26692e-01 |
4.330e-02 |
Gamma |
|
4.43879e-01 |
1.084e-01 |
Gamma |
|
4.76550e-01 |
1.356e-02 |
Gamma |
|
4.79357e-01 |
1.537e-01 |
Gamma |
|
5.11000e-01 |
2.154e-02 |
Annihilation photon |
|
5.87460e-01 |
1.565e-01 |
Gamma |
|
6.04761e-01 |
3.283e-02 |
Gamma |
|
6.16561e-01 |
1.041e-01 |
Gamma |
|
6.92060e-01 |
1.387e-02 |
Gamma |
|
7.03750e-01 |
3.792e-02 |
Gamma |
|
7.31227e-01 |
7.698e-02 |
Gamma |
|
1.68638e-05 |
9.456e-01 |
Auger electron |
|
1.13390e-04 |
6.333e+00 |
Auger electron |
|
1.23504e-04 |
5.213e-01 |
Auger electron |
|
1.82527e-04 |
9.880e-01 |
Auger electron |
|
5.69827e-04 |
1.942e-01 |
Auger electron |
|
8.97929e-04 |
2.137e+00 |
Auger electron |
|
1.07568e-03 |
1.451e-01 |
Auger electron |
|
4.77233e-03 |
7.848e-01 |
Auger electron |
|
5.92819e-03 |
2.752e-01 |
Auger electron |
|
7.11860e-03 |
2.391e-02 |
Auger electron |
|
3.47387e-02 |
5.219e-02 |
Auger electron |
|
4.11460e-02 |
2.584e-02 |
Auger electron |
|
5.77850e-02 |
2.929e-01 |
Conversion electron |
|
9.97382e-02 |
3.494e-02 |
Conversion electron |
|
1.00141e-01 |
3.590e-02 |
Conversion electron |
|
1.00845e-01 |
3.408e-02 |
Conversion electron |
|
1.06546e-01 |
2.420e-02 |
Conversion electron |
|
1.29883e-01 |
3.819e-02 |
Conversion electron |
|
1.41657e-01 |
1.005e-02 |
Conversion electron |
|
2.01560e-01 |
3.492e-02 |
Conversion electron |
|
2.37054e-01 |
2.594e-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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