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Radionuclide Dosimetric Data Sheets
Lead-199
Summary data
General
Classification
Isotope: Pb-199
Atomic number (Z): 82
Mass number (A): 199
Neutron number (N): 117
Radioactive decay
Decay modes: β+, Electron capture
Half-life: 90.0 [m]
Decay constant: 1.2836e-04 [1/s]
Daughters: Tl-199 (100.0%)
Radioactive daughters: Tl-199
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.0584 [MeV]
Mean photon energy: 1.03938 [MeV]
Air kerma rate constant, Γ10: 4.911e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 5.014e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 9.357e-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-:
9.357e-15 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 1.665e-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-199 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-199 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-199 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-199 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
2.07372e-05 |
1.338e+01 |
X-ray |
|
2.30022e-03 |
4.706e-02 |
X-ray |
|
1.01663e-02 |
1.533e-02 |
X-ray |
|
1.02661e-02 |
1.350e-01 |
X-ray |
|
1.22523e-02 |
8.553e-02 |
X-ray |
|
1.22749e-02 |
2.572e-02 |
X-ray |
|
1.43396e-02 |
1.727e-02 |
X-ray |
|
7.10519e-02 |
2.366e-01 |
X-ray |
|
7.31380e-02 |
3.992e-01 |
X-ray |
|
8.23883e-02 |
4.429e-02 |
X-ray |
|
8.28534e-02 |
8.573e-02 |
X-ray |
|
8.50837e-02 |
1.050e-02 |
X-ray |
|
8.51979e-02 |
2.060e-02 |
X-ray |
|
3.53390e-01 |
9.464e-02 |
Gamma |
|
3.66900e-01 |
4.424e-01 |
Gamma |
|
4.00540e-01 |
1.288e-02 |
Gamma |
|
5.11000e-01 |
5.303e-02 |
Annihilation photon |
|
7.20240e-01 |
6.496e-02 |
Gamma |
|
7.53920e-01 |
1.590e-02 |
Gamma |
|
7.61980e-01 |
2.240e-02 |
Gamma |
|
7.81480e-01 |
1.859e-02 |
Gamma |
|
8.74770e-01 |
1.635e-02 |
Gamma |
|
9.37890e-01 |
2.111e-02 |
Gamma |
|
1.00513e+00 |
1.344e-02 |
Gamma |
|
1.02921e+00 |
1.618e-02 |
Gamma |
|
1.12100e+00 |
1.501e-02 |
Gamma |
|
1.13504e+00 |
7.840e-02 |
Gamma |
|
1.23912e+00 |
2.117e-02 |
Gamma |
|
1.38271e+00 |
2.856e-02 |
Gamma |
|
1.40194e+00 |
1.008e-02 |
Gamma |
|
1.50204e+00 |
2.145e-02 |
Gamma |
|
1.65843e+00 |
5.600e-02 |
Gamma |
|
1.74970e+00 |
2.318e-02 |
Gamma |
|
8.17286e-01 |
2.001e-02 |
Positron |
|
4.30125e-05 |
2.937e+00 |
Auger electron |
|
7.57486e-05 |
4.384e+00 |
Auger electron |
|
1.74485e-04 |
2.298e+00 |
Auger electron |
|
4.17468e-04 |
5.008e-01 |
Auger electron |
|
8.95415e-04 |
1.588e-01 |
Auger electron |
|
1.85874e-03 |
1.211e+00 |
Auger electron |
|
2.10415e-03 |
1.425e-01 |
Auger electron |
|
7.84149e-03 |
3.601e-01 |
Auger electron |
|
1.01323e-02 |
1.566e-01 |
Auger electron |
|
1.24507e-02 |
1.638e-02 |
Auger electron |
|
5.72241e-02 |
2.051e-02 |
Auger electron |
|
6.88063e-02 |
1.116e-02 |
Auger electron |
|
2.67592e-01 |
1.628e-02 |
Conversion electron |
|
2.81102e-01 |
3.731e-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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