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Radionuclide Dosimetric Data Sheets

Lead-197

Summary data

General

Classification

Isotope:  Pb-197
Atomic number (Z):  82
Mass number (A):  197
Neutron number (N):  115

Radioactive decay

Decay modes:  β+, Electron capture
Half-life:  8.0 [m]
Decay constant:  1.4441e-03 [1/s]
Daughters:  Tl-197 (100.0%)
Radioactive daughters:  Tl-197

Dosimetric constants

Mean alpha energy:  0.0 [MeV]
Mean electron energy:  0.08176 [MeV]
Mean photon energy:  1.53192 [MeV]
Air kerma rate constant, Γ10:  6.516e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair:  6.669e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or electrons), Δwp:  1.310e-14 [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-:  1.310e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp:  2.454e-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-197 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-197 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-197 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-197 Summary Spectrum.csv

 

Energy [MeV]

Yield [#/nt] if > 0.01

Radiation type

2.07372e-05

1.330e+01

X-ray

2.30020e-03

4.682e-02

X-ray

1.01663e-02

1.528e-02

X-ray

1.02661e-02

1.346e-01

X-ray

1.22523e-02

8.536e-02

X-ray

1.22749e-02

2.563e-02

X-ray

1.43396e-02

1.724e-02

X-ray

7.10519e-02

2.370e-01

X-ray

7.31380e-02

3.998e-01

X-ray

8.23884e-02

4.435e-02

X-ray

8.28534e-02

8.586e-02

X-ray

8.50837e-02

1.051e-02

X-ray

8.51979e-02

2.063e-02

X-ray

3.75480e-01

1.278e-01

Gamma

3.85850e-01

5.040e-01

Gamma

3.94740e-01

2.070e-02

Gamma

5.11000e-01

7.930e-02

Annihilation photon

5.20700e-01

1.413e-02

Gamma

7.61140e-01

1.332e-01

Gamma

7.69840e-01

2.520e-02

Gamma

8.15280e-01

1.071e-02

Gamma

8.44180e-01

2.610e-02

Gamma

8.71610e-01

6.120e-02

Gamma

8.96090e-01

5.040e-02

Gamma

9.01680e-01

3.150e-02

Gamma

9.13450e-01

2.160e-02

Gamma

1.00383e+00

1.620e-02

Gamma

1.08816e+00

2.088e-02

Gamma

1.09282e+00

3.330e-02

Gamma

1.14006e+00

1.890e-02

Gamma

1.15609e+00

3.780e-02

Gamma

1.20899e+00

2.034e-02

Gamma

1.21921e+00

1.674e-02

Gamma

1.26123e+00

8.280e-02

Gamma

1.27727e+00

1.476e-02

Gamma

1.28886e+00

4.860e-02

Gamma

1.58449e+00

1.890e-02

Gamma

1.64714e+00

2.340e-02

Gamma

1.67462e+00

2.970e-02

Gamma

1.85404e+00

6.120e-02

Gamma

1.97575e+00

1.206e-02

Gamma

2.04377e+00

1.674e-02

Gamma

2.11273e+00

1.089e-02

Gamma

2.34545e+00

4.410e-02

Gamma

1.15936e+00

1.788e-02

Positron

4.30125e-05

2.922e+00

Auger electron

7.57404e-05

4.360e+00

Auger electron

1.74481e-04

2.285e+00

Auger electron

4.17348e-04

4.977e-01

Auger electron

8.98218e-04

1.562e-01

Auger electron

1.85873e-03

1.204e+00

Auger electron

2.10412e-03

1.417e-01

Auger electron

7.84082e-03

3.588e-01

Auger electron

1.01316e-02

1.560e-01

Auger electron

1.24498e-02

1.632e-02

Auger electron

5.72241e-02

2.054e-02

Auger electron

6.88063e-02

1.118e-02

Auger electron

2.89682e-01

2.369e-02

Conversion electron

3.00052e-01

3.577e-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

 

 

 

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