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Radionuclide Dosimetric Data Sheets
Bismuth-197
Summary data
General
Classification
Isotope: Bi-197
Atomic number (Z): 83
Mass number (A): 197
Neutron number (N): 114
Radioactive decay
Decay modes: β+, Electron capture
Half-life: 9.3 [m]
Decay constant: 1.2422e-03 [1/s]
Daughters: Pb-197 (56.1%), Pb-197m (43.9%)
Radioactive daughters: Pb-197, Pb-197m
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.28868 [MeV]
Mean photon energy: 1.6992 [MeV]
Air kerma rate constant, Γ10: 6.884e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 7.596e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 4.625e-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-:
4.625e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 2.722e-13
[Gy·kg/Bq·s]
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/Bi-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/Bi-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/Bi-197 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
2.66184e-05 |
1.654e+01 |
X-ray |
|
2.37948e-03 |
6.203e-02 |
X-ray |
|
9.21570e-03 |
1.053e-02 |
X-ray |
|
1.04453e-02 |
1.842e-02 |
X-ray |
|
1.05510e-02 |
1.621e-01 |
X-ray |
|
1.22977e-02 |
1.339e-02 |
X-ray |
|
1.26275e-02 |
3.120e-02 |
X-ray |
|
1.26563e-02 |
8.507e-02 |
X-ray |
|
1.27924e-02 |
1.462e-02 |
X-ray |
|
1.48158e-02 |
1.737e-02 |
X-ray |
|
7.30390e-02 |
1.964e-01 |
X-ray |
|
7.52501e-02 |
3.299e-01 |
X-ray |
|
8.47407e-02 |
3.675e-02 |
X-ray |
|
8.49000e-02 |
1.330e-01 |
Gamma |
|
8.52354e-02 |
7.118e-02 |
X-ray |
|
8.76558e-02 |
1.722e-02 |
X-ray |
|
2.92900e-01 |
2.282e-02 |
Gamma |
|
3.50800e-01 |
1.708e-02 |
Gamma |
|
5.11000e-01 |
3.675e-01 |
Annihilation photon |
|
5.72500e-01 |
3.794e-02 |
Gamma |
|
5.75100e-01 |
1.050e-02 |
Gamma |
|
6.19400e-01 |
1.148e-02 |
Gamma |
|
6.26000e-01 |
1.470e-02 |
Gamma |
|
7.55400e-01 |
1.694e-02 |
Gamma |
|
8.28200e-01 |
1.190e-01 |
Gamma |
|
8.54500e-01 |
1.400e-01 |
Gamma |
|
8.67200e-01 |
1.214e-01 |
Gamma |
|
8.91500e-01 |
1.512e-02 |
Gamma |
|
9.52100e-01 |
1.162e-02 |
Gamma |
|
9.69900e-01 |
1.064e-02 |
Gamma |
|
9.75700e-01 |
4.886e-02 |
Gamma |
|
9.88900e-01 |
3.626e-02 |
Gamma |
|
9.94500e-01 |
2.478e-02 |
Gamma |
|
1.00450e+00 |
6.860e-02 |
Gamma |
|
1.08000e+00 |
6.356e-02 |
Gamma |
|
1.08170e+00 |
2.422e-02 |
Gamma |
|
1.08940e+00 |
2.338e-02 |
Gamma |
|
1.11120e+00 |
2.310e-02 |
Gamma |
|
1.16670e+00 |
5.124e-02 |
Gamma |
|
1.25180e+00 |
3.430e-02 |
Gamma |
|
1.30510e+00 |
2.548e-02 |
Gamma |
|
1.31440e+00 |
2.478e-02 |
Gamma |
|
1.38800e+00 |
3.108e-02 |
Gamma |
|
1.43390e+00 |
1.526e-02 |
Gamma |
|
1.44020e+00 |
3.024e-02 |
Gamma |
|
1.49300e+00 |
1.246e-02 |
Gamma |
|
1.13448e+00 |
1.198e-02 |
Positron |
|
1.29100e+00 |
1.598e-02 |
Positron |
|
1.29418e+00 |
1.218e-02 |
Positron |
|
1.29498e+00 |
1.338e-02 |
Positron |
|
1.29922e+00 |
1.608e-02 |
Positron |
|
1.30276e+00 |
1.867e-02 |
Positron |
|
1.39039e+00 |
1.598e-02 |
Positron |
|
4.21637e-05 |
3.726e+00 |
Auger electron |
|
8.26225e-05 |
5.350e+00 |
Auger electron |
|
1.73944e-04 |
2.813e+00 |
Auger electron |
|
4.27302e-04 |
6.464e-01 |
Auger electron |
|
8.48417e-04 |
3.373e-01 |
Auger electron |
|
1.90907e-03 |
1.496e+00 |
Auger electron |
|
2.16913e-03 |
1.861e-01 |
Auger electron |
|
8.06484e-03 |
4.134e-01 |
Auger electron |
|
1.04460e-02 |
1.829e-01 |
Auger electron |
|
1.28597e-02 |
1.942e-02 |
Auger electron |
|
5.87487e-02 |
1.664e-02 |
Auger electron |
|
6.90530e-02 |
2.706e-01 |
Conversion electron |
|
6.96490e-02 |
2.658e-02 |
Conversion electron |
|
8.18454e-02 |
7.049e-02 |
Conversion electron |
|
8.49000e-02 |
2.267e-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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