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Radionuclide Dosimetric Data Sheets
Lutetium-169m
Summary data
General
Classification
Isotope: Lu-169m
Atomic number (Z): 71
Mass number (A): 169
Neutron number (N): 98
Radioactive decay
Decay modes: Internal transition
Half-life: 160.0 [s]
Decay constant: 4.3322e-03 [1/s]
Daughters: Lu-169 (100.0%)
Radioactive daughters: Lu-169
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.02735 [MeV]
Mean photon energy: 0.00168 [MeV]
Air kerma rate constant, Γ10: 7.331e-19 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 7.331e-19 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 4.382e-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-:
4.382e-15 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 2.692e-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/Lu-169m 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-169m 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/Lu-169m Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.40373e-05 |
7.987e+00 |
X-ray |
|
1.57131e-03 |
2.205e-02 |
X-ray |
|
7.64542e-03 |
7.270e-02 |
X-ray |
|
8.72222e-03 |
6.827e-02 |
X-ray |
|
9.04387e-03 |
1.251e-02 |
X-ray |
|
1.01636e-02 |
1.229e-02 |
X-ray |
|
9.83246e-06 |
6.916e-01 |
Auger electron |
|
2.16348e-05 |
9.815e-01 |
Auger electron |
|
1.56569e-04 |
2.862e+00 |
Auger electron |
|
2.62355e-04 |
8.649e-02 |
Auger electron |
|
2.70655e-04 |
5.196e-01 |
Auger electron |
|
8.16901e-04 |
5.111e-02 |
Auger electron |
|
1.31355e-03 |
1.198e+00 |
Auger electron |
|
1.49098e-03 |
5.810e-02 |
Auger electron |
|
6.01340e-03 |
3.809e-01 |
Auger electron |
|
7.56667e-03 |
1.393e-01 |
Auger electron |
|
9.14931e-03 |
1.289e-02 |
Auger electron |
|
1.86270e-02 |
3.247e-01 |
Conversion electron |
|
1.97568e-02 |
3.876e-01 |
Conversion electron |
|
2.69839e-02 |
2.220e-01 |
Conversion electron |
|
2.90000e-02 |
6.019e-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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