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Radionuclide Dosimetric Data Sheets
Gold-199
Summary data
General
Classification
Isotope: Au-199
Atomic number (Z): 79
Mass number (A): 199
Neutron number (N): 120
Radioactive decay
Decay modes: β-
Half-life: 3.139 [d]
Decay constant: 2.5558e-06 [1/s]
Daughters: Hg-199 (100.0%)
Radioactive daughters: None
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.14506 [MeV]
Mean photon energy: 0.09614 [MeV]
Air kerma rate constant, Γ10: 6.308e-18 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 6.308e-18 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 2.324e-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-:
2.324e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 1.540e-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-199 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-199 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-199 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-199 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.47085e-05 |
6.164e+00 |
X-ray |
|
2.22609e-03 |
2.002e-02 |
X-ray |
|
9.98620e-03 |
5.152e-02 |
X-ray |
|
1.18592e-02 |
4.923e-02 |
X-ray |
|
6.90989e-02 |
5.138e-02 |
X-ray |
|
7.10661e-02 |
8.708e-02 |
X-ray |
|
8.05161e-02 |
1.862e-02 |
X-ray |
|
1.58380e-01 |
4.000e-01 |
Gamma |
|
2.08206e-01 |
8.720e-02 |
Gamma |
|
6.72349e-02 |
2.150e-01 |
Beta |
|
8.22925e-02 |
7.200e-01 |
Beta |
|
1.32747e-01 |
6.500e-02 |
Beta |
|
4.20602e-05 |
1.397e+00 |
Auger electron |
|
7.00910e-05 |
2.041e+00 |
Auger electron |
|
1.75103e-04 |
1.079e+00 |
Auger electron |
|
4.22340e-04 |
2.302e-01 |
Auger electron |
|
9.10595e-04 |
6.565e-02 |
Auger electron |
|
1.81277e-03 |
5.487e-01 |
Auger electron |
|
2.04778e-03 |
6.084e-02 |
Auger electron |
|
7.77358e-03 |
1.630e-01 |
Auger electron |
|
9.98936e-03 |
6.985e-02 |
Auger electron |
|
3.50008e-02 |
2.875e-02 |
Conversion electron |
|
7.50265e-02 |
1.166e-01 |
Conversion electron |
|
1.24853e-01 |
6.640e-02 |
Conversion electron |
|
1.43554e-01 |
1.523e-02 |
Conversion electron |
|
1.44126e-01 |
1.008e-01 |
Conversion electron |
|
1.46093e-01 |
6.941e-02 |
Conversion electron |
|
1.55543e-01 |
4.840e-02 |
Conversion electron |
|
1.58380e-01 |
1.450e-02 |
Conversion electron |
|
1.93380e-01 |
1.005e-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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