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Radionuclide Dosimetric Data Sheets
Ytterbium-169
Summary data
General
Classification
Isotope: Yb-169
Atomic number (Z): 70
Mass number (A): 169
Neutron number (N): 99
Radioactive decay
Decay modes: Electron capture
Half-life: 32.03 [d]
Decay constant: 2.5050e-07 [1/s]
Daughters: Tm-169 (100.0%)
Radioactive daughters: None
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.14713 [MeV]
Mean photon energy: 0.33015 [MeV]
Air kerma rate constant, Γ10: 1.275e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 1.275e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 2.357e-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-:
2.357e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 5.290e-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/Yb-169 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/Yb-169 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/Yb-169 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.34758e-05 |
3.038e+01 |
X-ray |
|
1.44232e-03 |
7.757e-02 |
X-ray |
|
6.36071e-03 |
1.808e-02 |
X-ray |
|
7.12210e-03 |
2.827e-02 |
X-ray |
|
7.16830e-03 |
2.497e-01 |
X-ray |
|
8.00581e-03 |
1.256e-02 |
X-ray |
|
8.11340e-03 |
1.749e-01 |
X-ray |
|
8.21590e-03 |
1.686e-02 |
X-ray |
|
8.45978e-03 |
4.253e-02 |
X-ray |
|
9.44243e-03 |
3.107e-02 |
X-ray |
|
4.98586e-02 |
5.954e-01 |
X-ray |
|
5.08500e-02 |
1.052e+00 |
X-ray |
|
5.74128e-02 |
1.103e-01 |
X-ray |
|
5.76229e-02 |
2.132e-01 |
X-ray |
|
5.91167e-02 |
2.448e-02 |
X-ray |
|
5.91642e-02 |
4.735e-02 |
X-ray |
|
5.94584e-02 |
1.136e-02 |
X-ray |
|
6.30120e-02 |
2.148e-02 |
Gamma |
|
6.31208e-02 |
4.421e-01 |
Gamma |
|
9.36151e-02 |
2.606e-02 |
Gamma |
|
1.09780e-01 |
1.747e-01 |
Gamma |
|
1.18190e-01 |
1.869e-02 |
Gamma |
|
1.30524e-01 |
1.131e-01 |
Gamma |
|
1.77214e-01 |
2.216e-01 |
Gamma |
|
1.97958e-01 |
3.580e-01 |
Gamma |
|
2.61079e-01 |
1.715e-02 |
Gamma |
|
3.07738e-01 |
1.005e-01 |
Gamma |
|
2.06752e-05 |
1.450e+00 |
Auger electron |
|
4.71999e-05 |
1.097e-02 |
Auger electron |
|
1.47722e-04 |
1.359e+01 |
Auger electron |
|
2.31193e-04 |
4.524e-01 |
Auger electron |
|
2.54481e-04 |
2.810e+00 |
Auger electron |
|
8.38226e-04 |
3.466e-01 |
Auger electron |
|
1.20298e-03 |
4.946e+00 |
Auger electron |
|
1.39157e-03 |
2.424e-01 |
Auger electron |
|
1.58491e-03 |
1.497e-02 |
Auger electron |
|
3.52401e-03 |
2.190e-01 |
Conversion electron |
|
3.63278e-03 |
3.977e-01 |
Conversion electron |
|
5.65299e-03 |
1.446e+00 |
Auger electron |
|
6.54521e-03 |
7.424e-01 |
Conversion electron |
|
7.08778e-03 |
5.188e-01 |
Auger electron |
|
8.41031e-03 |
2.029e-01 |
Conversion electron |
|
8.55433e-03 |
4.717e-02 |
Auger electron |
|
1.06710e-02 |
7.116e-02 |
Conversion electron |
|
1.88869e-02 |
1.890e-02 |
Conversion electron |
|
3.26790e-02 |
1.108e-02 |
Conversion electron |
|
3.41271e-02 |
8.316e-02 |
Conversion electron |
|
4.07026e-02 |
7.504e-02 |
Auger electron |
|
4.07740e-02 |
1.424e-02 |
Conversion electron |
|
4.09806e-02 |
1.008e-01 |
Conversion electron |
|
4.19719e-02 |
1.149e-01 |
Conversion electron |
|
4.84128e-02 |
3.816e-02 |
Auger electron |
|
4.87449e-02 |
5.324e-02 |
Conversion electron |
|
5.02919e-02 |
3.528e-01 |
Conversion electron |
|
5.06100e-02 |
1.395e-02 |
Conversion electron |
|
5.29310e-02 |
3.035e-02 |
Conversion electron |
|
5.30398e-02 |
3.933e-02 |
Conversion electron |
|
5.34914e-02 |
1.453e-02 |
Conversion electron |
|
5.44827e-02 |
1.824e-02 |
Conversion electron |
|
5.87022e-02 |
1.302e-02 |
Conversion electron |
|
6.12557e-02 |
1.617e-02 |
Conversion electron |
|
7.10357e-02 |
6.081e-02 |
Conversion electron |
|
8.35341e-02 |
1.143e-02 |
Conversion electron |
|
9.96989e-02 |
4.864e-02 |
Conversion electron |
|
1.07915e-01 |
1.298e-02 |
Conversion electron |
|
1.17726e-01 |
1.071e-01 |
Conversion electron |
|
1.20894e-01 |
2.507e-02 |
Conversion electron |
|
1.21886e-01 |
2.208e-02 |
Conversion electron |
|
1.28659e-01 |
1.296e-02 |
Conversion electron |
|
1.38470e-01 |
1.315e-01 |
Conversion electron |
|
1.67133e-01 |
1.448e-02 |
Conversion electron |
|
1.87877e-01 |
1.787e-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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