<= Return to MIRDspec isotope database
Radionuclide Dosimetric Data Sheets
Bismuth-204
Summary data
General
Classification
Isotope: Bi-204
Atomic number (Z): 83
Mass number (A): 204
Neutron number (N): 121
Radioactive decay
Decay modes: β+, Electron capture
Half-life: 11.22 [h]
Decay constant: 1.7161e-05 [1/s]
Daughters: Pb-204m (9.85%), Pb-204 (90.1%)
Radioactive daughters: Pb-204m
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.08066 [MeV]
Mean photon energy: 2.91615 [MeV]
Air kerma rate constant, Γ10: 1.206e-16 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 1.207e-16 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 1.292e-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-:
1.292e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 4.672e-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-204 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-204 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-204 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-204 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
2.66208e-05 |
1.731e+01 |
X-ray |
|
2.38092e-03 |
6.473e-02 |
X-ray |
|
9.21570e-03 |
1.129e-02 |
X-ray |
|
1.04453e-02 |
1.975e-02 |
X-ray |
|
1.05510e-02 |
1.739e-01 |
X-ray |
|
1.26275e-02 |
3.347e-02 |
X-ray |
|
1.26563e-02 |
1.130e-01 |
X-ray |
|
1.48158e-02 |
2.307e-02 |
X-ray |
|
7.30390e-02 |
2.707e-01 |
X-ray |
|
7.52501e-02 |
4.547e-01 |
X-ray |
|
8.47407e-02 |
5.065e-02 |
X-ray |
|
8.52354e-02 |
9.811e-02 |
X-ray |
|
8.75343e-02 |
1.208e-02 |
X-ray |
|
8.76558e-02 |
2.374e-02 |
X-ray |
|
1.76090e-01 |
1.120e-02 |
Gamma |
|
2.16110e-01 |
1.429e-02 |
Gamma |
|
2.19410e-01 |
2.303e-02 |
Gamma |
|
2.48950e-01 |
2.144e-02 |
Gamma |
|
2.89300e-01 |
2.700e-02 |
Gamma |
|
3.74760e-01 |
6.749e-01 |
Gamma |
|
4.21610e-01 |
1.127e-02 |
Gamma |
|
4.40460e-01 |
2.461e-02 |
Gamma |
|
5.32720e-01 |
1.350e-02 |
Gamma |
|
6.61580e-01 |
2.541e-02 |
Gamma |
|
6.70720e-01 |
1.135e-01 |
Gamma |
|
7.09130e-01 |
1.429e-02 |
Gamma |
|
7.10480e-01 |
1.429e-02 |
Gamma |
|
7.53790e-01 |
1.080e-02 |
Gamma |
|
7.91200e-01 |
3.255e-02 |
Gamma |
|
8.34160e-01 |
1.112e-02 |
Gamma |
|
8.99150e-01 |
8.337e-01 |
Gamma |
|
9.11960e-01 |
1.112e-01 |
Gamma |
|
9.18260e-01 |
1.080e-01 |
Gamma |
|
9.83980e-01 |
5.876e-01 |
Gamma |
|
9.90400e-01 |
1.191e-02 |
Gamma |
|
1.04363e+00 |
1.270e-02 |
Gamma |
|
1.11135e+00 |
1.469e-02 |
Gamma |
|
1.20372e+00 |
1.985e-02 |
Gamma |
|
1.21172e+00 |
3.017e-02 |
Gamma |
|
1.27476e+00 |
2.144e-02 |
Gamma |
|
1.70327e+00 |
1.985e-02 |
Gamma |
|
1.75528e+00 |
1.223e-02 |
Gamma |
|
1.89627e+00 |
1.286e-02 |
Gamma |
|
4.21799e-05 |
3.896e+00 |
Auger electron |
|
8.24210e-05 |
5.599e+00 |
Auger electron |
|
1.73964e-04 |
2.959e+00 |
Auger electron |
|
4.24597e-04 |
6.761e-01 |
Auger electron |
|
9.42145e-04 |
2.201e-01 |
Auger electron |
|
1.91252e-03 |
1.565e+00 |
Auger electron |
|
2.17456e-03 |
1.954e-01 |
Auger electron |
|
3.21540e-03 |
4.510e-02 |
Conversion electron |
|
6.27000e-03 |
1.365e-02 |
Conversion electron |
|
8.05742e-03 |
4.454e-01 |
Auger electron |
|
1.04343e-02 |
1.971e-01 |
Auger electron |
|
1.20300e-02 |
1.276e-02 |
Conversion electron |
|
1.28394e-02 |
2.089e-02 |
Auger electron |
|
1.31530e-02 |
1.400e-02 |
Conversion electron |
|
5.25100e-02 |
1.598e-02 |
Conversion electron |
|
5.87487e-02 |
2.293e-02 |
Auger electron |
|
6.32890e-02 |
2.375e-02 |
Conversion electron |
|
6.43030e-02 |
1.762e-02 |
Conversion electron |
|
6.55000e-02 |
2.052e-02 |
Conversion electron |
|
7.07077e-02 |
1.254e-02 |
Auger electron |
|
7.54854e-02 |
1.191e-02 |
Conversion electron |
|
8.78000e-02 |
1.397e-02 |
Conversion electron |
|
1.27820e-01 |
1.301e-02 |
Conversion electron |
|
1.60660e-01 |
1.319e-02 |
Conversion electron |
|
2.01010e-01 |
1.092e-02 |
Conversion electron |
|
2.86470e-01 |
2.643e-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)
<= Return to MIRDspec isotope database
