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Radionuclide Dosimetric Data Sheets
Thulium-167
Summary data
General
Classification
Isotope: Tm-167
Atomic number (Z): 69
Mass number (A): 167
Neutron number (N): 98
Radioactive decay
Decay modes: Electron capture
Half-life: 9.25 [d]
Decay constant: 8.6730e-07 [1/s]
Daughters: Er-167 (100.0%)
Radioactive daughters: None
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.13317 [MeV]
Mean photon energy: 0.14823 [MeV]
Air kerma rate constant, Γ10: 5.886e-18 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 5.886e-18 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 2.134e-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-:
2.134e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 2.375e-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/Tm-167 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/Tm-167 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/Tm-167 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.35608e-05 |
1.449e+01 |
X-ray |
|
1.36850e-03 |
3.436e-02 |
X-ray |
|
6.89239e-03 |
1.408e-02 |
X-ray |
|
6.93540e-03 |
1.244e-01 |
X-ray |
|
7.81980e-03 |
1.058e-01 |
X-ray |
|
7.91999e-03 |
1.053e-02 |
X-ray |
|
8.17513e-03 |
2.116e-02 |
X-ray |
|
9.09455e-03 |
1.870e-02 |
X-ray |
|
4.82993e-02 |
2.728e-01 |
X-ray |
|
4.92265e-02 |
4.841e-01 |
X-ray |
|
5.55822e-02 |
5.043e-02 |
X-ray |
|
5.57777e-02 |
9.747e-02 |
X-ray |
|
5.70723e-02 |
4.669e-02 |
Gamma |
|
5.72170e-02 |
1.116e-02 |
X-ray |
|
5.72611e-02 |
2.160e-02 |
X-ray |
|
2.07801e-01 |
4.154e-01 |
Gamma |
|
5.31540e-01 |
1.610e-02 |
Gamma |
|
1.98170e-05 |
7.080e-01 |
Auger electron |
|
1.41470e-04 |
6.529e+00 |
Auger electron |
|
2.01739e-04 |
2.341e-01 |
Auger electron |
|
2.36853e-04 |
1.130e+00 |
Auger electron |
|
7.47280e-04 |
2.403e-01 |
Auger electron |
|
1.13541e-03 |
2.394e+00 |
Auger electron |
|
1.31280e-03 |
1.193e-01 |
Auger electron |
|
5.51378e-03 |
8.298e-01 |
Auger electron |
|
6.89262e-03 |
2.963e-01 |
Auger electron |
|
8.30492e-03 |
2.674e-02 |
Auger electron |
|
3.94671e-02 |
3.598e-02 |
Auger electron |
|
4.69039e-02 |
1.820e-02 |
Auger electron |
|
4.73561e-02 |
7.266e-02 |
Conversion electron |
|
4.77975e-02 |
5.825e-02 |
Conversion electron |
|
4.87249e-02 |
5.926e-02 |
Conversion electron |
|
5.52761e-02 |
4.474e-02 |
Conversion electron |
|
5.70723e-02 |
1.210e-02 |
Conversion electron |
|
1.50227e-01 |
1.975e-01 |
Conversion electron |
|
1.98085e-01 |
2.443e-02 |
Conversion electron |
|
1.98526e-01 |
1.663e-01 |
Conversion electron |
|
1.99454e-01 |
1.022e-01 |
Conversion electron |
|
2.06005e-01 |
7.334e-02 |
Conversion electron |
|
2.07801e-01 |
1.959e-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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