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Radionuclide Dosimetric Data Sheets
Thulium-174
Summary data
General
Classification
Isotope: Tm-174
Atomic number (Z): 69
Mass number (A): 174
Neutron number (N): 105
Radioactive decay
Decay modes: β-
Half-life: 5.4 [m]
Decay constant: 2.1393e-03 [1/s]
Daughters: Yb-174 (100.0%)
Radioactive daughters: None
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.51285 [MeV]
Mean photon energy: 1.77868 [MeV]
Air kerma rate constant, Γ10: 6.412e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 6.412e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 8.217e-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-:
8.217e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 2.850e-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/Tm-174 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-174 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-174 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-174 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
8.68458e-06 |
1.094e+01 |
X-ray |
|
1.50229e-03 |
2.723e-02 |
X-ray |
|
7.35569e-03 |
1.078e-02 |
X-ray |
|
7.40529e-03 |
9.514e-02 |
X-ray |
|
8.41451e-03 |
8.716e-02 |
X-ray |
|
8.74936e-03 |
1.624e-02 |
X-ray |
|
9.79888e-03 |
1.553e-02 |
X-ray |
|
5.14483e-02 |
1.048e-01 |
X-ray |
|
5.25072e-02 |
1.846e-01 |
X-ray |
|
5.92804e-02 |
1.946e-02 |
X-ray |
|
5.95058e-02 |
3.760e-02 |
X-ray |
|
7.64500e-02 |
9.135e-02 |
Gamma |
|
1.76520e-01 |
6.621e-01 |
Gamma |
|
2.72730e-01 |
8.578e-01 |
Gamma |
|
2.88000e-01 |
1.540e-02 |
Gamma |
|
3.63700e-01 |
2.697e-02 |
Gamma |
|
3.66400e-01 |
9.222e-01 |
Gamma |
|
4.43630e-01 |
1.087e-02 |
Gamma |
|
4.94120e-01 |
1.140e-01 |
Gamma |
|
6.28300e-01 |
2.697e-02 |
Gamma |
|
8.60750e-01 |
1.618e-02 |
Gamma |
|
9.91840e-01 |
8.700e-01 |
Gamma |
|
1.24210e+00 |
1.723e-02 |
Gamma |
|
1.26518e+00 |
2.192e-02 |
Gamma |
|
2.21777e-01 |
1.423e-01 |
Beta |
|
3.47507e-01 |
1.393e-02 |
Beta |
|
4.13761e-01 |
8.259e-01 |
Beta |
|
9.33150e-06 |
9.506e-01 |
Auger electron |
|
1.88609e-05 |
1.349e+00 |
Auger electron |
|
1.54794e-04 |
3.963e+00 |
Auger electron |
|
2.43572e-04 |
1.194e-01 |
Auger electron |
|
2.64084e-04 |
6.949e-01 |
Auger electron |
|
8.28903e-04 |
8.245e-02 |
Auger electron |
|
1.25860e-03 |
1.610e+00 |
Auger electron |
|
1.43194e-03 |
7.283e-02 |
Auger electron |
|
5.84349e-03 |
5.348e-01 |
Auger electron |
|
7.33481e-03 |
1.930e-01 |
Auger electron |
|
8.85617e-03 |
1.769e-02 |
Auger electron |
|
1.50090e-02 |
1.434e-01 |
Conversion electron |
|
4.19611e-02 |
1.264e-02 |
Auger electron |
|
6.59960e-02 |
1.538e-02 |
Conversion electron |
|
6.64574e-02 |
2.651e-01 |
Conversion electron |
|
6.75162e-02 |
2.709e-01 |
Conversion electron |
|
7.45148e-02 |
1.366e-01 |
Conversion electron |
|
7.64500e-02 |
3.603e-02 |
Conversion electron |
|
1.15079e-01 |
1.553e-01 |
Conversion electron |
|
1.66066e-01 |
1.657e-02 |
Conversion electron |
|
1.66527e-01 |
4.160e-02 |
Conversion electron |
|
1.67586e-01 |
3.215e-02 |
Conversion electron |
|
1.74585e-01 |
2.203e-02 |
Conversion electron |
|
2.11289e-01 |
5.913e-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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