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Radionuclide Dosimetric Data Sheets
Bismuth-205
Summary data
General
Classification
Isotope: Bi-205
Atomic number (Z): 83
Mass number (A): 205
Neutron number (N): 122
Radioactive decay
Decay modes: β+, Electron capture
Half-life: 15.31 [d]
Decay constant: 5.2401e-07 [1/s]
Daughters: Pb-205 (100.0%)
Radioactive daughters: Pb-205
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.03459 [MeV]
Mean photon energy: 1.6913 [MeV]
Air kerma rate constant, Γ10: 7.222e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 7.228e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 5.542e-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-:
5.542e-15 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 2.710e-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-205 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-205 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-205 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-205 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
2.66177e-05 |
1.563e+01 |
X-ray |
|
2.37917e-03 |
5.794e-02 |
X-ray |
|
9.21570e-03 |
1.039e-02 |
X-ray |
|
1.04453e-02 |
1.818e-02 |
X-ray |
|
1.05510e-02 |
1.600e-01 |
X-ray |
|
1.26275e-02 |
3.079e-02 |
X-ray |
|
1.26563e-02 |
8.419e-02 |
X-ray |
|
1.27924e-02 |
1.043e-02 |
X-ray |
|
1.48158e-02 |
1.719e-02 |
X-ray |
|
7.30390e-02 |
2.154e-01 |
X-ray |
|
7.52501e-02 |
3.617e-01 |
X-ray |
|
8.47407e-02 |
4.029e-02 |
X-ray |
|
8.52354e-02 |
7.804e-02 |
X-ray |
|
8.76558e-02 |
1.888e-02 |
X-ray |
|
2.60500e-01 |
1.089e-02 |
Gamma |
|
2.84150e-01 |
1.692e-02 |
Gamma |
|
5.49840e-01 |
2.951e-02 |
Gamma |
|
5.70600e-01 |
4.335e-02 |
Gamma |
|
5.79800e-01 |
5.443e-02 |
Gamma |
|
7.03450e-01 |
3.110e-01 |
Gamma |
|
7.59100e-01 |
1.036e-02 |
Gamma |
|
9.10900e-01 |
1.642e-02 |
Gamma |
|
9.87660e-01 |
1.613e-01 |
Gamma |
|
1.04375e+00 |
7.511e-02 |
Gamma |
|
1.19003e+00 |
2.261e-02 |
Gamma |
|
1.35152e+00 |
1.057e-02 |
Gamma |
|
1.61430e+00 |
2.277e-02 |
Gamma |
|
1.76430e+00 |
3.247e-01 |
Gamma |
|
1.77580e+00 |
3.987e-02 |
Gamma |
|
1.86170e+00 |
6.170e-02 |
Gamma |
|
1.90345e+00 |
2.466e-02 |
Gamma |
|
4.21615e-05 |
3.530e+00 |
Auger electron |
|
8.26346e-05 |
5.045e+00 |
Auger electron |
|
1.73954e-04 |
2.681e+00 |
Auger electron |
|
4.23914e-04 |
6.017e-01 |
Auger electron |
|
8.78927e-04 |
2.496e-01 |
Auger electron |
|
1.90927e-03 |
1.399e+00 |
Auger electron |
|
2.16961e-03 |
1.743e-01 |
Auger electron |
|
2.32800e-03 |
3.588e-02 |
Conversion electron |
|
8.02256e-03 |
3.973e-01 |
Auger electron |
|
1.03730e-02 |
7.569e-02 |
Conversion electron |
|
1.03987e-02 |
1.757e-01 |
Auger electron |
|
1.28039e-02 |
1.862e-02 |
Auger electron |
|
1.31800e-02 |
4.199e-02 |
Conversion electron |
|
2.31654e-02 |
3.372e-02 |
Conversion electron |
|
2.62200e-02 |
1.096e-02 |
Conversion electron |
|
5.87487e-02 |
1.824e-02 |
Auger 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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