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Radionuclide Dosimetric Data Sheets
Lead-201
Summary data
General
Classification
Isotope: Pb-201
Atomic number (Z): 82
Mass number (A): 201
Neutron number (N): 119
Radioactive decay
Decay modes: β+, Electron capture
Half-life: 9.33 [h]
Decay constant: 2.0637e-05 [1/s]
Daughters: Tl-201 (100.0%)
Radioactive daughters: Tl-201
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.05938 [MeV]
Mean photon energy: 0.75624 [MeV]
Air kerma rate constant, Γ10: 4.330e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 4.332e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 9.514e-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-:
9.514e-15 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 1.212e-13
[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-201 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-201 Summary Spectrum.csv
Beta spectra (plot)
Spectra source: ICRP Publication 107: Nuclear Decay Data for Dosimetric Calculations. Ann. ICRP 2008, 38 (3).
Download tabulated beta spectra file here: www.mirdsoft.org/products/MIRDspecs/Pb-201 Beta 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-201 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
2.07370e-05 |
1.495e+01 |
X-ray |
|
2.30028e-03 |
5.256e-02 |
X-ray |
|
1.01663e-02 |
1.703e-02 |
X-ray |
|
1.02661e-02 |
1.500e-01 |
X-ray |
|
1.22523e-02 |
9.464e-02 |
X-ray |
|
1.22749e-02 |
2.857e-02 |
X-ray |
|
1.43396e-02 |
1.911e-02 |
X-ray |
|
7.10519e-02 |
2.582e-01 |
X-ray |
|
7.31380e-02 |
4.357e-01 |
X-ray |
|
8.23884e-02 |
4.834e-02 |
X-ray |
|
8.28534e-02 |
9.358e-02 |
X-ray |
|
8.50837e-02 |
1.146e-02 |
X-ray |
|
8.51979e-02 |
2.248e-02 |
X-ray |
|
3.31170e-01 |
7.910e-01 |
Gamma |
|
3.61270e-01 |
9.888e-02 |
Gamma |
|
4.06030e-01 |
2.009e-02 |
Gamma |
|
5.84550e-01 |
3.560e-02 |
Gamma |
|
6.92370e-01 |
4.271e-02 |
Gamma |
|
7.67280e-01 |
3.164e-02 |
Gamma |
|
8.03660e-01 |
1.511e-02 |
Gamma |
|
8.26210e-01 |
2.357e-02 |
Gamma |
|
9.07560e-01 |
5.695e-02 |
Gamma |
|
9.45960e-01 |
7.356e-02 |
Gamma |
|
1.06995e+00 |
1.139e-02 |
Gamma |
|
1.09851e+00 |
1.827e-02 |
Gamma |
|
1.23876e+00 |
1.179e-02 |
Gamma |
|
1.27713e+00 |
1.629e-02 |
Gamma |
|
4.30125e-05 |
3.283e+00 |
Auger electron |
|
7.57720e-05 |
4.898e+00 |
Auger electron |
|
1.74499e-04 |
2.567e+00 |
Auger electron |
|
4.17848e-04 |
5.609e-01 |
Auger electron |
|
8.86879e-04 |
1.837e-01 |
Auger electron |
|
1.85876e-03 |
1.352e+00 |
Auger electron |
|
2.10421e-03 |
1.591e-01 |
Auger electron |
|
7.84405e-03 |
4.006e-01 |
Auger electron |
|
1.01353e-02 |
1.743e-01 |
Auger electron |
|
1.24543e-02 |
1.822e-02 |
Auger electron |
|
5.72241e-02 |
2.238e-02 |
Auger electron |
|
6.88063e-02 |
1.218e-02 |
Auger electron |
|
2.45372e-01 |
8.623e-02 |
Conversion electron |
|
2.75472e-01 |
2.019e-02 |
Conversion electron |
|
3.15840e-01 |
1.293e-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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