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Radionuclide Dosimetric Data Sheets
Lutetium-174m
Summary data
General
Classification
Isotope: Lu-174m
Atomic number (Z): 71
Mass number (A): 174
Neutron number (N): 103
Radioactive decay
Decay modes: Electron capture, Internal transition
Half-life: 142.0 [d]
Decay constant: 5.6497e-08 [1/s]
Daughters: Lu-174 (99.4%), Yb-174 (0.62%)
Radioactive daughters: Lu-174
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.1188 [MeV]
Mean photon energy: 0.0626 [MeV]
Air kerma rate constant, Γ10: 4.329e-18 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 4.329e-18 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 1.903e-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-:
1.903e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 1.003e-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/Lu-174m 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-174m 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-174m Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
8.56644e-06 |
1.370e-01 |
X-ray |
|
1.39731e-05 |
2.577e+01 |
X-ray |
|
1.56979e-03 |
6.941e-02 |
X-ray |
|
6.77270e-03 |
1.736e-02 |
X-ray |
|
7.59238e-03 |
2.823e-02 |
X-ray |
|
7.64541e-03 |
2.493e-01 |
X-ray |
|
8.58698e-03 |
2.177e-02 |
X-ray |
|
8.72221e-03 |
9.396e-02 |
X-ray |
|
8.82888e-03 |
2.846e-02 |
X-ray |
|
9.04388e-03 |
4.290e-02 |
X-ray |
|
1.01636e-02 |
1.691e-02 |
X-ray |
|
4.46830e-02 |
1.243e-01 |
Gamma |
|
5.30692e-02 |
2.018e-01 |
X-ray |
|
5.41988e-02 |
3.543e-01 |
X-ray |
|
6.11839e-02 |
3.755e-02 |
X-ray |
|
6.14258e-02 |
7.254e-02 |
X-ray |
|
6.30870e-02 |
1.623e-02 |
X-ray |
|
6.70580e-02 |
7.249e-02 |
Gamma |
|
9.52165e-06 |
1.235e-02 |
Auger electron |
|
1.00912e-05 |
2.269e+00 |
Auger electron |
|
1.88631e-05 |
1.732e-02 |
Auger electron |
|
2.16371e-05 |
3.202e+00 |
Auger electron |
|
1.54497e-04 |
4.955e-02 |
Auger electron |
|
1.56371e-04 |
9.184e+00 |
Auger electron |
|
2.67699e-04 |
1.696e+00 |
Auger electron |
|
2.69165e-04 |
2.826e-01 |
Auger electron |
|
4.94356e-04 |
7.254e-01 |
Auger electron |
|
1.26222e-03 |
1.887e-02 |
Auger electron |
|
1.30887e-03 |
3.790e+00 |
Auger electron |
|
1.48570e-03 |
1.826e-01 |
Auger electron |
|
1.69254e-03 |
1.184e-02 |
Auger electron |
|
3.61601e-03 |
7.324e-01 |
Conversion electron |
|
5.96369e-03 |
1.157e+00 |
Auger electron |
|
7.52293e-03 |
4.227e-01 |
Auger electron |
|
9.11463e-03 |
3.921e-02 |
Auger electron |
|
3.38380e-02 |
5.834e-01 |
Conversion electron |
|
3.43100e-02 |
6.606e-02 |
Conversion electron |
|
3.54398e-02 |
2.201e-02 |
Conversion electron |
|
4.26669e-02 |
1.519e-01 |
Conversion electron |
|
4.32341e-02 |
2.333e-02 |
Auger electron |
|
4.46830e-02 |
4.345e-02 |
Conversion electron |
|
4.82350e-02 |
2.153e-01 |
Conversion electron |
|
4.87070e-02 |
2.755e-02 |
Conversion electron |
|
4.98368e-02 |
4.638e-01 |
Conversion electron |
|
5.15128e-02 |
1.200e-02 |
Auger electron |
|
5.62130e-02 |
1.027e-01 |
Conversion electron |
|
5.66850e-02 |
1.272e-02 |
Conversion electron |
|
5.70639e-02 |
2.034e-01 |
Conversion electron |
|
5.90800e-02 |
5.709e-02 |
Conversion electron |
|
6.50419e-02 |
2.736e-02 |
Conversion electron |
|
1.15827e-01 |
1.694e-02 |
Conversion electron |
|
1.16957e-01 |
1.181e-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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