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Radionuclide Dosimetric Data Sheets
Gold-194
Summary data
General
Classification
Isotope: Au-194
Atomic number (Z): 79
Mass number (A): 194
Neutron number (N): 115
Radioactive decay
Decay modes: β+, Electron capture
Half-life: 38.02 [h]
Decay constant: 5.0642e-06 [1/s]
Daughters: Pt-194 (100.0%)
Radioactive daughters: None
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.04206 [MeV]
Mean photon energy: 1.03855 [MeV]
Air kerma rate constant, Γ10: 4.091e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 4.157e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 6.739e-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-:
6.739e-15 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 1.664e-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/Au-194 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-194 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-194 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-194 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.01422e-05 |
1.444e+01 |
X-ray |
|
2.06868e-03 |
4.088e-02 |
X-ray |
|
9.35457e-03 |
1.413e-02 |
X-ray |
|
9.43805e-03 |
1.245e-01 |
X-ray |
|
1.11006e-02 |
7.693e-02 |
X-ray |
|
1.12510e-02 |
2.303e-02 |
X-ray |
|
1.29799e-02 |
1.501e-02 |
X-ray |
|
6.53020e-02 |
2.295e-01 |
X-ray |
|
6.70480e-02 |
3.920e-01 |
X-ray |
|
7.55931e-02 |
4.295e-02 |
X-ray |
|
7.59780e-02 |
8.305e-02 |
X-ray |
|
7.80108e-02 |
1.001e-02 |
X-ray |
|
7.81028e-02 |
1.952e-02 |
X-ray |
|
2.93580e-01 |
1.037e-01 |
Gamma |
|
3.28500e-01 |
6.100e-01 |
Gamma |
|
3.64870e-01 |
1.507e-02 |
Gamma |
|
4.82800e-01 |
1.128e-02 |
Gamma |
|
5.11000e-01 |
3.380e-02 |
Annihilation photon |
|
5.28760e-01 |
1.647e-02 |
Gamma |
|
6.22050e-01 |
1.708e-02 |
Gamma |
|
6.45180e-01 |
2.141e-02 |
Gamma |
|
9.38710e-01 |
1.104e-02 |
Gamma |
|
9.48290e-01 |
2.196e-02 |
Gamma |
|
1.10406e+00 |
2.013e-02 |
Gamma |
|
1.15078e+00 |
1.391e-02 |
Gamma |
|
1.17534e+00 |
2.013e-02 |
Gamma |
|
1.21876e+00 |
1.104e-02 |
Gamma |
|
1.34215e+00 |
1.220e-02 |
Gamma |
|
1.46889e+00 |
6.405e-02 |
Gamma |
|
1.59240e+00 |
1.098e-02 |
Gamma |
|
1.59580e+00 |
1.708e-02 |
Gamma |
|
1.88590e+00 |
1.891e-02 |
Gamma |
|
1.88700e+00 |
1.403e-02 |
Gamma |
|
1.92418e+00 |
2.013e-02 |
Gamma |
|
2.04367e+00 |
3.599e-02 |
Gamma |
|
6.71950e-01 |
1.098e-02 |
Positron |
|
3.74694e-05 |
3.075e+00 |
Auger electron |
|
5.59534e-05 |
4.966e+00 |
Auger electron |
|
1.71216e-04 |
2.615e+00 |
Auger electron |
|
4.06141e-04 |
4.720e-01 |
Auger electron |
|
7.02011e-04 |
1.725e-01 |
Auger electron |
|
1.69604e-03 |
1.289e+00 |
Auger electron |
|
1.90659e-03 |
1.227e-01 |
Auger electron |
|
7.25481e-03 |
3.904e-01 |
Auger electron |
|
9.30446e-03 |
1.610e-01 |
Auger electron |
|
1.13827e-02 |
1.619e-02 |
Auger electron |
|
5.27836e-02 |
2.143e-02 |
Auger electron |
|
6.32891e-02 |
1.148e-02 |
Auger electron |
|
2.49885e-01 |
2.991e-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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