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Radionuclide Dosimetric Data Sheets
Thulium-173
Summary data
General
Classification
Isotope: Tm-173
Atomic number (Z): 69
Mass number (A): 173
Neutron number (N): 104
Radioactive decay
Decay modes: β-
Half-life: 8.24 [h]
Decay constant: 2.3367e-05 [1/s]
Daughters: Yb-173 (100.0%)
Radioactive daughters: None
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.31026 [MeV]
Mean photon energy: 0.38848 [MeV]
Air kerma rate constant, Γ10: 1.468e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 1.468e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 4.971e-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-:
4.971e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 6.224e-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-173 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-173 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/Tm-173 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/Tm-173 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
8.65777e-06 |
1.535e+00 |
X-ray |
|
7.40529e-03 |
1.406e-02 |
X-ray |
|
8.41451e-03 |
1.026e-02 |
X-ray |
|
5.14483e-02 |
2.891e-02 |
X-ray |
|
5.25072e-02 |
5.095e-02 |
X-ray |
|
5.95058e-02 |
1.038e-02 |
X-ray |
|
3.98900e-01 |
8.790e-01 |
Gamma |
|
4.61400e-01 |
6.856e-02 |
Gamma |
|
2.72324e-01 |
2.200e-01 |
Beta |
|
2.96296e-01 |
7.600e-01 |
Beta |
|
4.55208e-01 |
2.000e-02 |
Beta |
|
9.38839e-06 |
1.337e-01 |
Auger electron |
|
1.88613e-05 |
1.897e-01 |
Auger electron |
|
1.54803e-04 |
5.553e-01 |
Auger electron |
|
2.45009e-04 |
1.673e-02 |
Auger electron |
|
2.61870e-04 |
9.673e-02 |
Auger electron |
|
8.64851e-04 |
1.353e-02 |
Auger electron |
|
1.15900e-03 |
8.089e-02 |
Conversion electron |
|
1.25712e-03 |
2.255e-01 |
Auger electron |
|
1.42958e-03 |
1.018e-02 |
Auger electron |
|
5.81693e-03 |
7.485e-02 |
Auger electron |
|
7.30829e-03 |
2.699e-02 |
Auger electron |
|
5.21460e-02 |
1.129e-02 |
Conversion electron |
|
5.26074e-02 |
1.577e-02 |
Conversion electron |
|
5.36662e-02 |
1.605e-02 |
Conversion electron |
|
6.06648e-02 |
1.040e-02 |
Conversion electron |
|
3.37459e-01 |
2.181e-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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