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Radionuclide Dosimetric Data Sheets
Lead-203
Summary data
General
Classification
Isotope: Pb-203
Atomic number (Z): 82
Mass number (A): 203
Neutron number (N): 121
Radioactive decay
Decay modes: Electron capture
Half-life: 51.87 [h]
Decay constant: 3.7118e-06 [1/s]
Daughters: Tl-203 (100.0%)
Radioactive daughters: None
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.05296 [MeV]
Mean photon energy: 0.31427 [MeV]
Air kerma rate constant, Γ10: 2.735e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 2.735e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 8.485e-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-:
8.485e-15 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 5.035e-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/Pb-203 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/Pb-203 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-203 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
2.07370e-05 |
1.515e+01 |
X-ray |
|
2.30038e-03 |
5.324e-02 |
X-ray |
|
1.01663e-02 |
1.718e-02 |
X-ray |
|
1.02661e-02 |
1.513e-01 |
X-ray |
|
1.22523e-02 |
9.588e-02 |
X-ray |
|
1.22749e-02 |
2.883e-02 |
X-ray |
|
1.43396e-02 |
1.936e-02 |
X-ray |
|
7.10519e-02 |
2.576e-01 |
X-ray |
|
7.31380e-02 |
4.345e-01 |
X-ray |
|
8.23883e-02 |
4.821e-02 |
X-ray |
|
8.28534e-02 |
9.333e-02 |
X-ray |
|
8.50837e-02 |
1.143e-02 |
X-ray |
|
8.51979e-02 |
2.242e-02 |
X-ray |
|
2.79197e-01 |
8.080e-01 |
Gamma |
|
4.01325e-01 |
3.345e-02 |
Gamma |
|
4.30131e-05 |
3.327e+00 |
Auger electron |
|
7.57887e-05 |
4.963e+00 |
Auger electron |
|
1.74514e-04 |
2.602e+00 |
Auger electron |
|
4.18146e-04 |
5.695e-01 |
Auger electron |
|
8.84471e-04 |
1.886e-01 |
Auger electron |
|
1.85886e-03 |
1.369e+00 |
Auger electron |
|
2.10438e-03 |
1.611e-01 |
Auger electron |
|
7.84682e-03 |
4.050e-01 |
Auger electron |
|
1.01383e-02 |
1.762e-01 |
Auger electron |
|
1.24578e-02 |
1.843e-02 |
Auger electron |
|
5.72241e-02 |
2.232e-02 |
Auger electron |
|
6.88063e-02 |
1.215e-02 |
Auger electron |
|
1.93399e-01 |
1.361e-01 |
Conversion electron |
|
2.63867e-01 |
2.042e-02 |
Conversion electron |
|
2.64451e-01 |
1.078e-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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