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Radionuclide Dosimetric Data Sheets
Bismuth-214
Summary data
General
Classification
Isotope: Bi-214
Atomic number (Z): 83
Mass number (A): 214
Neutron number (N): 131
Radioactive decay
Decay modes: α, β-
Half-life: 19.9 [m]
Decay constant: 5.8053e-04 [1/s]
Daughters: Po-214 (100.0%), Tl-210 (0.021%)
Radioactive daughters: Po-214, Tl-210
Dosimetric constants
Mean alpha energy: 0.0011 [MeV]
Mean electron energy: 0.66313 [MeV]
Mean photon energy: 1.47933 [MeV]
Air kerma rate constant, Γ10: 4.990e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 4.990e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 1.064e-13 [Gy·kg/Bq·s]
Equilibrium dose constant for alphas, Δα: 1.762e-16
[Gy·kg/Bq·s]
Equilibrium dose constant for betas/electrons, Δβ-,β+,e-:
1.062e-13 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 2.370e-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-214 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-214 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-214 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-214 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
3.84122e-05 |
3.141e-01 |
X-ray |
|
6.09312e-01 |
4.610e-01 |
Gamma |
|
6.65453e-01 |
1.460e-02 |
Gamma |
|
7.68356e-01 |
4.940e-02 |
Gamma |
|
8.06174e-01 |
1.220e-02 |
Gamma |
|
9.34061e-01 |
3.030e-02 |
Gamma |
|
1.12029e+00 |
1.510e-01 |
Gamma |
|
1.15519e+00 |
1.630e-02 |
Gamma |
|
1.23811e+00 |
5.790e-02 |
Gamma |
|
1.28096e+00 |
1.430e-02 |
Gamma |
|
1.37767e+00 |
4.000e-02 |
Gamma |
|
1.40150e+00 |
1.270e-02 |
Gamma |
|
1.40798e+00 |
2.150e-02 |
Gamma |
|
1.50923e+00 |
2.110e-02 |
Gamma |
|
1.66128e+00 |
1.150e-02 |
Gamma |
|
1.72960e+00 |
2.920e-02 |
Gamma |
|
1.76449e+00 |
1.540e-01 |
Gamma |
|
1.84742e+00 |
2.110e-02 |
Gamma |
|
2.11855e+00 |
1.140e-02 |
Gamma |
|
2.20421e+00 |
5.080e-02 |
Gamma |
|
2.44786e+00 |
1.570e-02 |
Gamma |
|
2.48861e-01 |
1.332e-02 |
Beta |
|
2.61524e-01 |
2.813e-02 |
Beta |
|
3.52789e-01 |
5.727e-02 |
Beta |
|
3.85762e-01 |
4.265e-02 |
Beta |
|
4.25286e-01 |
2.203e-02 |
Beta |
|
4.27836e-01 |
1.372e-02 |
Beta |
|
4.34205e-01 |
1.141e-02 |
Beta |
|
4.75557e-01 |
1.592e-02 |
Beta |
|
4.92676e-01 |
8.190e-02 |
Beta |
|
5.26005e-01 |
1.704e-01 |
Beta |
|
5.40101e-01 |
1.782e-01 |
Beta |
|
6.16017e-01 |
2.954e-02 |
Beta |
|
6.84383e-01 |
7.439e-02 |
Beta |
|
1.00818e+00 |
1.702e-02 |
Beta |
|
1.26948e+00 |
1.822e-01 |
Beta |
|
3.94623e-05 |
7.502e-02 |
Auger electron |
|
9.70765e-05 |
9.787e-02 |
Auger electron |
|
1.74661e-04 |
5.266e-02 |
Auger electron |
|
4.33238e-04 |
1.210e-02 |
Auger electron |
|
2.01476e-03 |
2.860e-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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