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Radionuclide Dosimetric Data Sheets

Lead-198

Isotope:  Pb-198
Atomic number (Z):  82
Mass number (A):  198
Neutron number (N):  116

Decay modes:  Electron capture
Half-life:  2.4 [h]
Decay constant:  8.0225e-05 [1/s]
Daughters:  Tl-198 (100.0%)
Radioactive daughters:  Tl-198

Mean alpha energy:  0.0 [MeV]
Mean electron energy:  0.07813 [MeV]
Mean photon energy:  0.43848 [MeV]
Air kerma rate constant, Γ₁₀:  3.484e-17 [Gy·m²/Bq·s]
Air kerma coefficient, K_air:  3.484e-17 [Gy·m²/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or electrons), Δ_wp:  1.252e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for alphas, Δ_α:  0.000e+00 [Gy·kg/Bq·s]
Equilibrium dose constant for betas/electrons, Δ_β-,β+,e-:  1.252e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δ_p:  7.025e-14 [Gy·kg/Bq·s]

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-198 DPK.csv

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-198 Summary Spectrum.csv

 

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-198 Summary Spectrum.csv

 

Energy [MeV]	Yield [#/nt] if > 0.01	Radiation type
2.07376e-05	1.792e+01	X-ray
2.30075e-03	6.294e-02	X-ray
8.98130e-03	1.147e-02	X-ray
1.01663e-02	2.005e-02	X-ray
1.02661e-02	1.766e-01	X-ray
1.22523e-02	1.168e-01	X-ray
1.22749e-02	3.364e-02	X-ray
1.43396e-02	2.359e-02	X-ray
7.10519e-02	2.874e-01	X-ray
7.31380e-02	4.849e-01	X-ray
8.23884e-02	5.380e-02	X-ray
8.28534e-02	1.041e-01	X-ray
8.50837e-02	1.275e-02	X-ray
8.51979e-02	2.502e-02	X-ray
1.16900e-01	1.170e-02	Gamma
1.73400e-01	1.800e-01	Gamma
2.59500e-01	5.760e-02	Gamma
2.90300e-01	3.600e-01	Gamma
3.65400e-01	1.926e-01	Gamma
3.82000e-01	5.580e-02	Gamma
3.97700e-01	2.880e-02	Gamma
5.75000e-01	3.060e-02	Gamma
6.49000e-01	1.800e-02	Gamma
7.43000e-01	1.458e-02	Gamma
8.65300e-01	5.940e-02	Gamma
4.30175e-05	3.937e+00	Auger electron
7.58078e-05	5.872e+00	Auger electron
1.74567e-04	3.079e+00	Auger electron
4.18928e-04	6.745e-01	Auger electron
8.89617e-04	2.235e-01	Auger electron
1.85937e-03	1.618e+00	Auger electron
2.10511e-03	1.905e-01	Auger electron
7.86069e-03	4.780e-01	Auger electron
1.01531e-02	2.080e-01	Auger electron
1.24739e-02	2.176e-02	Auger electron
1.54700e-02	2.752e-02	Conversion electron
3.11020e-02	5.546e-02	Conversion electron
5.72241e-02	2.491e-02	Auger electron
6.88063e-02	1.355e-02	Auger electron
8.76020e-02	4.231e-02	Conversion electron
1.58654e-01	3.330e-02	Conversion electron
1.60740e-01	2.165e-02	Conversion electron
1.70455e-01	1.588e-02	Conversion electron
1.73702e-01	2.913e-02	Conversion electron
2.04502e-01	4.365e-02	Conversion electron
2.79602e-01	3.840e-02	Conversion electron

 

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

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

 

 

 

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