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Radionuclide Dosimetric Data Sheets
Gold-191
Summary data
General
Classification
Isotope: Au-191
Atomic number (Z): 79
Mass number (A): 191
Neutron number (N): 112
Radioactive decay
Decay modes: β+, Electron capture
Half-life: 3.18 [h]
Decay constant: 6.0547e-05 [1/s]
Daughters: Pt-191 (100.0%)
Radioactive daughters: Pt-191
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.08649 [MeV]
Mean photon energy: 0.59462 [MeV]
Air kerma rate constant, Γ10: 3.191e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 3.198e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 1.386e-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-:
1.386e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 9.527e-14
[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/Au-191 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/Au-191 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/Au-191 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/Au-191 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.01416e-05 |
2.845e+01 |
X-ray |
|
2.07720e-03 |
7.580e-02 |
X-ray |
|
8.29381e-03 |
1.284e-02 |
X-ray |
|
9.35457e-03 |
2.228e-02 |
X-ray |
|
9.43804e-03 |
1.963e-01 |
X-ray |
|
1.11006e-02 |
1.204e-01 |
X-ray |
|
1.12251e-02 |
1.052e-02 |
X-ray |
|
1.12510e-02 |
3.631e-02 |
X-ray |
|
1.29799e-02 |
2.350e-02 |
X-ray |
|
6.53020e-02 |
3.035e-01 |
X-ray |
|
6.70480e-02 |
5.186e-01 |
X-ray |
|
7.55931e-02 |
5.681e-02 |
X-ray |
|
7.59780e-02 |
1.099e-01 |
X-ray |
|
7.80108e-02 |
1.324e-02 |
X-ray |
|
7.81028e-02 |
2.583e-02 |
X-ray |
|
9.11100e-02 |
1.496e-02 |
Gamma |
|
1.32890e-01 |
1.224e-02 |
Gamma |
|
1.58830e-01 |
1.479e-02 |
Gamma |
|
1.66500e-01 |
3.315e-02 |
Gamma |
|
1.94110e-01 |
2.737e-02 |
Gamma |
|
2.06390e-01 |
1.394e-02 |
Gamma |
|
2.53950e-01 |
2.533e-02 |
Gamma |
|
2.63090e-01 |
1.547e-02 |
Gamma |
|
2.68330e-01 |
1.972e-02 |
Gamma |
|
2.71650e-01 |
2.516e-02 |
Gamma |
|
2.77860e-01 |
7.208e-02 |
Gamma |
|
2.80400e-01 |
2.941e-02 |
Gamma |
|
2.83900e-01 |
6.732e-02 |
Gamma |
|
2.93450e-01 |
2.839e-02 |
Gamma |
|
3.53880e-01 |
3.111e-02 |
Gamma |
|
3.86900e-01 |
3.604e-02 |
Gamma |
|
3.90270e-01 |
2.720e-02 |
Gamma |
|
3.99840e-01 |
4.743e-02 |
Gamma |
|
4.13730e-01 |
3.689e-02 |
Gamma |
|
4.21440e-01 |
3.451e-02 |
Gamma |
|
4.51850e-01 |
1.343e-02 |
Gamma |
|
4.51850e-01 |
1.343e-02 |
Gamma |
|
4.78040e-01 |
3.944e-02 |
Gamma |
|
4.87610e-01 |
2.771e-02 |
Gamma |
|
5.86440e-01 |
1.700e-01 |
Gamma |
|
6.20310e-01 |
1.088e-02 |
Gamma |
|
6.74220e-01 |
6.834e-02 |
Gamma |
|
3.74748e-05 |
6.170e+00 |
Auger electron |
|
5.70113e-05 |
9.700e+00 |
Auger electron |
|
1.71741e-04 |
5.170e+00 |
Auger electron |
|
4.16654e-04 |
1.225e+00 |
Auger electron |
|
6.76520e-04 |
3.188e-01 |
Auger electron |
|
1.70687e-03 |
2.387e+00 |
Auger electron |
|
1.92892e-03 |
2.309e-01 |
Auger electron |
|
2.26136e-03 |
1.160e-02 |
Auger electron |
|
6.92310e-03 |
3.487e-01 |
Conversion electron |
|
7.26589e-03 |
6.205e-01 |
Auger electron |
|
9.12500e-03 |
1.617e-02 |
Conversion electron |
|
9.31706e-03 |
2.560e-01 |
Auger electron |
|
9.56000e-03 |
1.071e-01 |
Conversion electron |
|
1.05280e-02 |
1.753e-02 |
Conversion electron |
|
1.10770e-02 |
1.041e-02 |
Conversion electron |
|
1.13979e-02 |
2.576e-02 |
Auger electron |
|
1.24950e-02 |
1.111e-02 |
Conversion electron |
|
1.28230e-02 |
1.042e-02 |
Conversion electron |
|
1.65380e-02 |
7.720e-02 |
Conversion electron |
|
2.77631e-02 |
2.076e-02 |
Conversion electron |
|
3.45080e-02 |
3.539e-02 |
Conversion electron |
|
3.68030e-02 |
1.430e-02 |
Conversion electron |
|
4.57331e-02 |
1.387e-02 |
Conversion electron |
|
5.27836e-02 |
2.836e-02 |
Auger electron |
|
5.42750e-02 |
2.961e-02 |
Conversion electron |
|
5.74750e-02 |
1.421e-02 |
Conversion electron |
|
6.32891e-02 |
1.519e-02 |
Auger electron |
|
6.88750e-02 |
1.213e-02 |
Conversion electron |
|
7.77970e-02 |
3.860e-02 |
Conversion electron |
|
7.95430e-02 |
3.388e-02 |
Conversion electron |
|
8.02150e-02 |
1.874e-02 |
Conversion electron |
|
8.78850e-02 |
3.654e-02 |
Conversion electron |
|
8.84731e-02 |
1.929e-02 |
Conversion electron |
|
1.15495e-01 |
2.154e-02 |
Conversion electron |
|
1.99245e-01 |
2.349e-02 |
Conversion electron |
|
2.05285e-01 |
1.849e-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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