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Radionuclide Dosimetric Data Sheets
Gold-198m
Summary data
General
Classification
Isotope: Au-198m
Atomic number (Z): 79
Mass number (A): 198
Neutron number (N): 119
Radioactive decay
Decay modes: Internal transition
Half-life: 2.27 [d]
Decay constant: 3.5342e-06 [1/s]
Daughters: Au-198 (100.0%)
Radioactive daughters: Au-198
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.27478 [MeV]
Mean photon energy: 0.53323 [MeV]
Air kerma rate constant, Γ10: 3.008e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 3.008e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 4.402e-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-:
4.402e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 8.543e-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-198m 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-198m Summary 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-198m Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.10946e-05 |
3.089e+01 |
X-ray |
|
2.14405e-03 |
9.376e-02 |
X-ray |
|
8.52062e-03 |
1.925e-02 |
X-ray |
|
9.62130e-03 |
3.350e-02 |
X-ray |
|
9.70979e-03 |
2.951e-01 |
X-ray |
|
1.14753e-02 |
1.498e-01 |
X-ray |
|
1.15870e-02 |
5.514e-02 |
X-ray |
|
1.34225e-02 |
2.958e-02 |
X-ray |
|
6.71839e-02 |
2.476e-01 |
X-ray |
|
6.90380e-02 |
4.212e-01 |
X-ray |
|
7.78158e-02 |
4.633e-02 |
X-ray |
|
7.82261e-02 |
8.965e-02 |
X-ray |
|
8.03237e-02 |
1.086e-02 |
X-ray |
|
8.04227e-02 |
2.123e-02 |
X-ray |
|
9.72100e-02 |
6.930e-01 |
Gamma |
|
1.80310e-01 |
5.005e-01 |
Gamma |
|
2.04100e-01 |
4.081e-01 |
Gamma |
|
2.14890e-01 |
7.700e-01 |
Gamma |
|
3.33820e-01 |
1.789e-01 |
Gamma |
|
4.01427e-05 |
6.789e+00 |
Auger electron |
|
6.39638e-05 |
1.042e+01 |
Auger electron |
|
1.74149e-04 |
5.508e+00 |
Auger electron |
|
4.09146e-04 |
1.063e+00 |
Auger electron |
|
7.73841e-04 |
2.929e-01 |
Auger electron |
|
1.75321e-03 |
2.763e+00 |
Auger electron |
|
1.97379e-03 |
2.862e-01 |
Auger electron |
|
2.31249e-03 |
1.413e-02 |
Auger electron |
|
7.37954e-03 |
8.248e-01 |
Auger electron |
|
9.50221e-03 |
3.461e-01 |
Auger electron |
|
1.16501e-02 |
3.519e-02 |
Auger electron |
|
1.62500e-02 |
2.481e-01 |
Conversion electron |
|
3.42400e-02 |
7.245e-02 |
Conversion electron |
|
3.67240e-02 |
7.025e-02 |
Conversion electron |
|
3.85780e-02 |
7.142e-02 |
Conversion electron |
|
4.77660e-02 |
3.713e-02 |
Conversion electron |
|
5.05000e-02 |
1.089e-02 |
Conversion electron |
|
5.42437e-02 |
2.253e-02 |
Auger electron |
|
6.50992e-02 |
1.213e-02 |
Auger electron |
|
8.28740e-02 |
2.703e-02 |
Conversion electron |
|
8.34340e-02 |
1.028e-02 |
Conversion electron |
|
8.52880e-02 |
1.072e-02 |
Conversion electron |
|
9.44760e-02 |
1.123e-02 |
Conversion electron |
|
9.93500e-02 |
1.092e-01 |
Conversion electron |
|
1.00864e-01 |
1.639e-01 |
Conversion electron |
|
1.01424e-01 |
3.431e-02 |
Conversion electron |
|
1.03278e-01 |
4.509e-01 |
Conversion electron |
|
1.12466e-01 |
2.144e-01 |
Conversion electron |
|
1.15200e-01 |
6.683e-02 |
Conversion electron |
|
1.23140e-01 |
3.362e-01 |
Conversion electron |
|
1.33930e-01 |
1.094e-01 |
Conversion electron |
|
1.65974e-01 |
1.381e-02 |
Conversion electron |
|
1.66534e-01 |
6.506e-02 |
Conversion electron |
|
1.68388e-01 |
4.316e-02 |
Conversion electron |
|
1.77576e-01 |
3.152e-02 |
Conversion electron |
|
1.89764e-01 |
5.043e-02 |
Conversion electron |
|
2.00554e-01 |
1.415e-02 |
Conversion electron |
|
2.01114e-01 |
4.676e-02 |
Conversion electron |
|
2.01366e-01 |
1.307e-02 |
Conversion electron |
|
2.02968e-01 |
2.868e-02 |
Conversion electron |
|
2.12156e-01 |
2.297e-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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