<= Return to MIRDspec isotope database
Radionuclide Dosimetric Data Sheets
Lutetium-171m
Summary data
General
Classification
Isotope: Lu-171m
Atomic number (Z): 71
Mass number (A): 171
Neutron number (N): 100
Radioactive decay
Decay modes: Internal transition
Half-life: 79.0 [s]
Decay constant: 8.7740e-03 [1/s]
Daughters: Lu-171 (100.0%)
Radioactive daughters: Lu-171
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.06905 [MeV]
Mean photon energy: 0.00208 [MeV]
Air kerma rate constant, Γ10: 8.685e-19 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 8.685e-19 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 1.106e-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-:
1.106e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 3.333e-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-171m 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-171m 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-171m Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.40369e-05 |
8.104e+00 |
X-ray |
|
1.57202e-03 |
2.231e-02 |
X-ray |
|
7.64542e-03 |
6.894e-02 |
X-ray |
|
8.72221e-03 |
7.975e-02 |
X-ray |
|
9.04387e-03 |
1.186e-02 |
X-ray |
|
1.01636e-02 |
1.435e-02 |
X-ray |
|
9.80734e-06 |
7.037e-01 |
Auger electron |
|
2.16348e-05 |
9.962e-01 |
Auger electron |
|
1.56591e-04 |
2.904e+00 |
Auger electron |
|
2.62973e-04 |
8.858e-02 |
Auger electron |
|
2.73281e-04 |
5.311e-01 |
Auger electron |
|
8.16381e-04 |
5.979e-02 |
Auger electron |
|
1.31464e-03 |
1.211e+00 |
Auger electron |
|
1.49298e-03 |
5.871e-02 |
Auger electron |
|
6.06143e-03 |
3.918e-01 |
Auger electron |
|
7.61738e-03 |
1.435e-01 |
Auger electron |
|
9.20379e-03 |
1.329e-02 |
Auger electron |
|
6.07270e-02 |
3.783e-01 |
Conversion electron |
|
6.18568e-02 |
3.547e-01 |
Conversion electron |
|
6.90839e-02 |
2.009e-01 |
Conversion electron |
|
7.11000e-02 |
5.430e-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)
<= Return to MIRDspec isotope database
