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Radionuclide Dosimetric Data Sheets
Lead-205
Summary data
General
Classification
Isotope: Pb-205
Atomic number (Z): 82
Mass number (A): 205
Neutron number (N): 123
Radioactive decay
Decay modes: Electron capture
Half-life: 15300000.0 [y]
Decay constant: 1.4356e-15 [1/s]
Daughters: Tl-205 (100.0%)
Radioactive daughters: None
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.00621 [MeV]
Mean photon energy: 0.00252 [MeV]
Air kerma rate constant, Γ10: 1.071e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 1.071e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 9.950e-16 [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-:
9.950e-16 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 4.037e-16
[Gy·kg/Bq·s]
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/Pb-205 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/Pb-205 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
2.07163e-05 |
1.085e+01 |
X-ray |
|
2.29157e-03 |
3.746e-02 |
X-ray |
|
1.01663e-02 |
1.625e-02 |
X-ray |
|
1.02661e-02 |
1.431e-01 |
X-ray |
|
1.22749e-02 |
2.727e-02 |
X-ray |
|
4.28409e-05 |
2.397e+00 |
Auger electron |
|
7.47417e-05 |
3.540e+00 |
Auger electron |
|
1.72451e-04 |
1.866e+00 |
Auger electron |
|
3.82150e-04 |
4.358e-01 |
Auger electron |
|
7.22315e-04 |
2.119e-02 |
Auger electron |
|
1.85164e-03 |
9.807e-01 |
Auger electron |
|
2.09830e-03 |
1.164e-01 |
Auger electron |
|
7.33757e-03 |
2.729e-01 |
Auger electron |
|
9.58671e-03 |
1.176e-01 |
Auger electron |
|
1.18417e-02 |
1.215e-02 |
Auger 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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