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Radionuclide Dosimetric Data Sheets
Bismuth-201
Summary data
General
Classification
Isotope: Bi-201
Atomic number (Z): 83
Mass number (A): 201
Neutron number (N): 118
Radioactive decay
Decay modes: β+, Electron capture
Half-life: 108.0 [m]
Decay constant: 1.0697e-04 [1/s]
Daughters: Pb-201 (54.8%), Pb-201m (45.2%)
Radioactive daughters: Pb-201, Pb-201m
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.06117 [MeV]
Mean photon energy: 1.73041 [MeV]
Air kerma rate constant, Γ10: 7.371e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 7.461e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 9.801e-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-:
9.801e-15 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 2.772e-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/Bi-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/Bi-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/Bi-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/Bi-201 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
2.66216e-05 |
1.470e+01 |
X-ray |
|
2.38021e-03 |
5.533e-02 |
X-ray |
|
1.04453e-02 |
1.741e-02 |
X-ray |
|
1.05510e-02 |
1.532e-01 |
X-ray |
|
1.26275e-02 |
2.949e-02 |
X-ray |
|
1.26563e-02 |
1.046e-01 |
X-ray |
|
1.48158e-02 |
2.135e-02 |
X-ray |
|
7.30390e-02 |
2.416e-01 |
X-ray |
|
7.52501e-02 |
4.058e-01 |
X-ray |
|
8.47407e-02 |
4.520e-02 |
X-ray |
|
8.52354e-02 |
8.755e-02 |
X-ray |
|
8.75343e-02 |
1.078e-02 |
X-ray |
|
8.76558e-02 |
2.118e-02 |
X-ray |
|
8.86000e-02 |
1.056e-02 |
Gamma |
|
1.71700e-01 |
2.496e-02 |
Gamma |
|
4.14600e-01 |
1.320e-02 |
Gamma |
|
5.11000e-01 |
4.678e-02 |
Annihilation photon |
|
7.36400e-01 |
1.272e-02 |
Gamma |
|
7.46800e-01 |
1.128e-02 |
Gamma |
|
7.86400e-01 |
9.528e-02 |
Gamma |
|
8.18900e-01 |
7.344e-02 |
Gamma |
|
8.47700e-01 |
1.776e-02 |
Gamma |
|
8.55800e-01 |
1.368e-02 |
Gamma |
|
8.67000e-01 |
2.016e-02 |
Gamma |
|
8.79600e-01 |
1.680e-02 |
Gamma |
|
9.02000e-01 |
8.352e-02 |
Gamma |
|
9.11000e-01 |
1.896e-02 |
Gamma |
|
9.36200e-01 |
1.130e-01 |
Gamma |
|
9.90600e-01 |
3.240e-02 |
Gamma |
|
1.01410e+00 |
1.070e-01 |
Gamma |
|
1.10810e+00 |
3.936e-02 |
Gamma |
|
1.21450e+00 |
2.424e-02 |
Gamma |
|
1.23470e+00 |
1.752e-02 |
Gamma |
|
1.24140e+00 |
1.440e-02 |
Gamma |
|
1.28890e+00 |
1.896e-02 |
Gamma |
|
1.32520e+00 |
6.096e-02 |
Gamma |
|
1.41790e+00 |
1.152e-02 |
Gamma |
|
1.50300e+00 |
1.032e-02 |
Gamma |
|
1.52330e+00 |
1.320e-02 |
Gamma |
|
1.53840e+00 |
2.736e-02 |
Gamma |
|
1.55860e+00 |
1.344e-02 |
Gamma |
|
1.57080e+00 |
2.400e-02 |
Gamma |
|
1.60380e+00 |
1.176e-02 |
Gamma |
|
1.63490e+00 |
1.920e-02 |
Gamma |
|
1.65090e+00 |
5.808e-02 |
Gamma |
|
4.21820e-05 |
3.303e+00 |
Auger electron |
|
8.23182e-05 |
4.759e+00 |
Auger electron |
|
1.73887e-04 |
2.512e+00 |
Auger electron |
|
4.23126e-04 |
5.595e-01 |
Auger electron |
|
9.78504e-04 |
1.701e-01 |
Auger electron |
|
1.91124e-03 |
1.336e+00 |
Auger electron |
|
2.17197e-03 |
1.666e-01 |
Auger electron |
|
8.06014e-03 |
3.941e-01 |
Auger electron |
|
1.04364e-02 |
1.743e-01 |
Auger electron |
|
1.28403e-02 |
1.848e-02 |
Auger electron |
|
5.87487e-02 |
2.046e-02 |
Auger electron |
|
7.07077e-02 |
1.119e-02 |
Auger electron |
|
7.33490e-02 |
4.996e-02 |
Conversion electron |
|
7.55600e-02 |
4.159e-02 |
Conversion electron |
|
8.34100e-02 |
4.331e-02 |
Conversion electron |
|
8.55454e-02 |
2.474e-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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