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Radionuclide Dosimetric Data Sheets
Ytterbium-166
Summary data
General
Classification
Isotope: Yb-166
Atomic number (Z): 70
Mass number (A): 166
Neutron number (N): 96
Radioactive decay
Decay modes: Electron capture
Half-life: 56.7 [h]
Decay constant: 3.3958e-06 [1/s]
Daughters: Tm-166 (100.0%)
Radioactive daughters: Tm-166
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.04173 [MeV]
Mean photon energy: 0.08676 [MeV]
Air kerma rate constant, Γ10: 3.904e-18 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 3.904e-18 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 6.686e-15 [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-:
6.686e-15 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 1.390e-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-166 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-166 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-166 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.33916e-05 |
1.461e+01 |
X-ray |
|
1.43539e-03 |
3.877e-02 |
X-ray |
|
6.36071e-03 |
1.062e-02 |
X-ray |
|
7.12210e-03 |
1.661e-02 |
X-ray |
|
7.16830e-03 |
1.467e-01 |
X-ray |
|
8.11340e-03 |
9.664e-02 |
X-ray |
|
8.21590e-03 |
1.154e-02 |
X-ray |
|
8.45978e-03 |
2.499e-02 |
X-ray |
|
9.44242e-03 |
1.716e-02 |
X-ray |
|
4.98586e-02 |
3.958e-01 |
X-ray |
|
5.08500e-02 |
6.998e-01 |
X-ray |
|
5.74128e-02 |
7.333e-02 |
X-ray |
|
5.76228e-02 |
1.417e-01 |
X-ray |
|
5.91167e-02 |
1.628e-02 |
X-ray |
|
5.91642e-02 |
3.148e-02 |
X-ray |
|
8.22900e-02 |
1.508e-01 |
Gamma |
|
2.06752e-05 |
6.773e-01 |
Auger electron |
|
1.48015e-04 |
6.498e+00 |
Auger electron |
|
2.25690e-04 |
2.097e-01 |
Auger electron |
|
2.48178e-04 |
1.133e+00 |
Auger electron |
|
8.46852e-04 |
2.190e-01 |
Auger electron |
|
1.19490e-03 |
2.489e+00 |
Auger electron |
|
1.37042e-03 |
1.181e-01 |
Auger electron |
|
5.65276e-03 |
8.450e-01 |
Auger electron |
|
7.08834e-03 |
3.032e-01 |
Auger electron |
|
8.55593e-03 |
2.757e-02 |
Auger electron |
|
2.28020e-02 |
7.101e-01 |
Conversion electron |
|
4.07026e-02 |
4.989e-02 |
Auger electron |
|
4.84128e-02 |
2.538e-02 |
Auger electron |
|
7.22090e-02 |
9.824e-02 |
Conversion electron |
|
8.04249e-02 |
2.420e-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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