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Radionuclide Dosimetric Data Sheets
Thulium-170
Summary data
General
Classification
Isotope: Tm-170
Atomic number (Z): 69
Mass number (A): 170
Neutron number (N): 101
Radioactive decay
Decay modes: β-, Electron capture
Half-life: 128.6 [d]
Decay constant: 6.2384e-08 [1/s]
Daughters: Yb-170 (99.9%), Er-170 (0.131%)
Radioactive daughters: None
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.32799 [MeV]
Mean photon energy: 0.00414 [MeV]
Air kerma rate constant, Γ10: 1.497e-19 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 1.497e-19 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 5.255e-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-:
5.255e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 6.633e-16
[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-170 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-170 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-170 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-170 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
8.69105e-06 |
1.361e+00 |
X-ray |
|
1.35616e-05 |
1.257e-02 |
X-ray |
|
7.40528e-03 |
1.170e-02 |
X-ray |
|
8.41451e-03 |
1.123e-02 |
X-ray |
|
5.25072e-02 |
1.654e-02 |
X-ray |
|
8.42547e-02 |
2.471e-02 |
Gamma |
|
2.90391e-01 |
1.829e-01 |
Beta |
|
3.23057e-01 |
8.157e-01 |
Beta |
|
9.31835e-06 |
1.182e-01 |
Auger electron |
|
1.88608e-05 |
1.677e-01 |
Auger electron |
|
1.54792e-04 |
4.932e-01 |
Auger electron |
|
2.43224e-04 |
1.485e-02 |
Auger electron |
|
2.64577e-04 |
8.663e-02 |
Auger electron |
|
1.25895e-03 |
2.004e-01 |
Auger electron |
|
5.84899e-03 |
6.656e-02 |
Auger electron |
|
7.34024e-03 |
2.402e-02 |
Auger electron |
|
2.28137e-02 |
3.433e-02 |
Conversion electron |
|
7.42621e-02 |
4.547e-02 |
Conversion electron |
|
7.53209e-02 |
4.530e-02 |
Conversion electron |
|
8.23195e-02 |
2.332e-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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