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Radionuclide Dosimetric Data Sheets
Lutetium-169
Summary data
General
Classification
Isotope: Lu-169
Atomic number (Z): 71
Mass number (A): 169
Neutron number (N): 98
Radioactive decay
Decay modes: β+, Electron capture
Half-life: 34.06 [h]
Decay constant: 5.6530e-06 [1/s]
Daughters: Yb-169 (100.0%)
Radioactive daughters: Yb-169
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.04769 [MeV]
Mean photon energy: 1.31663 [MeV]
Air kerma rate constant, Γ10: 4.580e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 4.585e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 7.641e-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-:
7.641e-15 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 2.109e-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/Lu-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/Lu-169 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/Lu-169 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/Lu-169 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
8.63738e-06 |
1.670e+01 |
X-ray |
|
1.50160e-03 |
4.120e-02 |
X-ray |
|
6.56570e-03 |
1.080e-02 |
X-ray |
|
7.35570e-03 |
1.724e-02 |
X-ray |
|
7.40530e-03 |
1.522e-01 |
X-ray |
|
8.41451e-03 |
1.011e-01 |
X-ray |
|
8.74937e-03 |
2.598e-02 |
X-ray |
|
9.79888e-03 |
1.801e-02 |
X-ray |
|
5.14483e-02 |
3.382e-01 |
X-ray |
|
5.25072e-02 |
5.960e-01 |
X-ray |
|
5.92804e-02 |
6.281e-02 |
X-ray |
|
5.95058e-02 |
1.214e-01 |
X-ray |
|
6.10550e-02 |
1.397e-02 |
X-ray |
|
6.11060e-02 |
2.702e-02 |
X-ray |
|
7.08814e-02 |
1.701e-02 |
Gamma |
|
8.73836e-02 |
2.457e-02 |
Gamma |
|
1.10929e-01 |
1.750e-02 |
Gamma |
|
1.56898e-01 |
1.406e-02 |
Gamma |
|
1.65013e-01 |
1.968e-02 |
Gamma |
|
1.91214e-01 |
2.059e-01 |
Gamma |
|
3.78624e-01 |
2.108e-02 |
Gamma |
|
8.89753e-01 |
5.359e-02 |
Gamma |
|
9.60622e-01 |
2.340e-01 |
Gamma |
|
1.00747e+00 |
1.804e-02 |
Gamma |
|
1.06028e+00 |
1.909e-02 |
Gamma |
|
1.07379e+00 |
1.123e-02 |
Gamma |
|
1.07828e+00 |
1.072e-02 |
Gamma |
|
1.18488e+00 |
2.223e-02 |
Gamma |
|
1.28328e+00 |
2.106e-02 |
Gamma |
|
1.29059e+00 |
1.144e-02 |
Gamma |
|
1.33882e+00 |
1.622e-02 |
Gamma |
|
1.37904e+00 |
2.106e-02 |
Gamma |
|
1.37904e+00 |
1.076e-02 |
Gamma |
|
1.39227e+00 |
1.196e-02 |
Gamma |
|
1.44974e+00 |
9.922e-02 |
Gamma |
|
1.46339e+00 |
1.509e-02 |
Gamma |
|
1.46684e+00 |
3.323e-02 |
Gamma |
|
9.41883e-06 |
1.459e+00 |
Auger electron |
|
1.88616e-05 |
2.069e+00 |
Auger electron |
|
1.54781e-04 |
6.041e+00 |
Auger electron |
|
2.46438e-04 |
1.829e-01 |
Auger electron |
|
2.61685e-04 |
1.057e+00 |
Auger electron |
|
8.83334e-04 |
1.670e-01 |
Auger electron |
|
1.25679e-03 |
2.441e+00 |
Auger electron |
|
1.27800e-03 |
5.723e-02 |
Conversion electron |
|
1.42956e-03 |
1.102e-01 |
Auger electron |
|
1.85600e-03 |
3.582e-02 |
Conversion electron |
|
5.81444e-03 |
8.015e-01 |
Auger electron |
|
7.30687e-03 |
2.890e-01 |
Auger electron |
|
8.82988e-03 |
2.651e-02 |
Auger electron |
|
9.44040e-03 |
1.255e-01 |
Conversion electron |
|
1.03748e-02 |
1.041e-02 |
Conversion electron |
|
1.42074e-02 |
4.504e-02 |
Conversion electron |
|
1.52662e-02 |
5.663e-02 |
Conversion electron |
|
2.22648e-02 |
3.254e-02 |
Conversion electron |
|
2.59426e-02 |
1.022e-01 |
Conversion electron |
|
2.93282e-02 |
2.065e-02 |
Conversion electron |
|
3.05327e-02 |
2.193e-02 |
Conversion electron |
|
4.19611e-02 |
4.082e-02 |
Auger electron |
|
4.28545e-02 |
1.054e-02 |
Conversion electron |
|
4.94881e-02 |
3.743e-02 |
Conversion electron |
|
4.99512e-02 |
2.086e-02 |
Auger electron |
|
5.27264e-02 |
1.346e-02 |
Conversion electron |
|
5.37852e-02 |
1.382e-02 |
Conversion electron |
|
6.04274e-02 |
1.747e-02 |
Conversion electron |
|
7.69296e-02 |
1.421e-02 |
Conversion electron |
|
1.29773e-01 |
1.237e-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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