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Radionuclide Dosimetric Data Sheets
Gold-187
Summary data
General
Classification
Isotope: Au-187
Atomic number (Z): 79
Mass number (A): 187
Neutron number (N): 108
Radioactive decay
Decay modes: α, β+, Electron capture
Half-life: 8.4 [m]
Decay constant: 1.3753e-03 [1/s]
Daughters: Pt-187 (100.0%), Ir-183 (0.003%)
Radioactive daughters: Pt-187, Ir-183
Dosimetric constants
Mean alpha energy: 0.0001 [MeV]
Mean electron energy: 0.13602 [MeV]
Mean photon energy: 1.06523 [MeV]
Air kerma rate constant, Γ10: 4.282e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 4.577e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 2.181e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for alphas, Δα: 1.602e-17
[Gy·kg/Bq·s]
Equilibrium dose constant for betas/electrons, Δβ-,β+,e-:
2.179e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 1.707e-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-187 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-187 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-187 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-187 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.01424e-05 |
2.467e+01 |
X-ray |
|
2.07395e-03 |
6.731e-02 |
X-ray |
|
8.29381e-03 |
1.189e-02 |
X-ray |
|
9.35458e-03 |
2.063e-02 |
X-ray |
|
9.43804e-03 |
1.818e-01 |
X-ray |
|
1.11006e-02 |
1.157e-01 |
X-ray |
|
1.12251e-02 |
1.036e-02 |
X-ray |
|
1.12510e-02 |
3.363e-02 |
X-ray |
|
1.29799e-02 |
2.258e-02 |
X-ray |
|
6.53020e-02 |
2.402e-01 |
X-ray |
|
6.70480e-02 |
4.103e-01 |
X-ray |
|
7.55931e-02 |
4.495e-02 |
X-ray |
|
7.59780e-02 |
8.692e-02 |
X-ray |
|
7.80108e-02 |
1.047e-02 |
X-ray |
|
7.81028e-02 |
2.043e-02 |
X-ray |
|
1.81200e-01 |
1.197e-02 |
Gamma |
|
1.86000e-01 |
1.743e-02 |
Gamma |
|
1.90400e-01 |
1.316e-02 |
Gamma |
|
2.47400e-01 |
1.253e-02 |
Gamma |
|
3.90500e-01 |
1.533e-02 |
Gamma |
|
4.26400e-01 |
1.890e-02 |
Gamma |
|
5.11000e-01 |
1.522e-01 |
Annihilation photon |
|
5.59800e-01 |
1.470e-02 |
Gamma |
|
6.20800e-01 |
1.792e-02 |
Gamma |
|
6.35000e-01 |
1.064e-02 |
Gamma |
|
7.06000e-01 |
1.540e-02 |
Gamma |
|
7.20400e-01 |
1.267e-02 |
Gamma |
|
8.33400e-01 |
1.393e-02 |
Gamma |
|
9.14600e-01 |
3.024e-02 |
Gamma |
|
1.26650e+00 |
2.408e-02 |
Gamma |
|
1.31900e+00 |
1.799e-02 |
Gamma |
|
1.33190e+00 |
7.000e-02 |
Gamma |
|
1.40810e+00 |
3.059e-02 |
Gamma |
|
1.45230e+00 |
1.435e-02 |
Gamma |
|
1.98730e+00 |
1.036e-02 |
Gamma |
|
1.99140e+00 |
1.183e-02 |
Gamma |
|
1.20874e+00 |
1.198e-02 |
Positron |
|
1.21291e+00 |
1.198e-02 |
Positron |
|
3.74724e-05 |
5.313e+00 |
Auger electron |
|
5.66236e-05 |
8.440e+00 |
Auger electron |
|
1.71581e-04 |
4.476e+00 |
Auger electron |
|
4.13828e-04 |
9.619e-01 |
Auger electron |
|
6.73707e-04 |
3.125e-01 |
Auger electron |
|
1.70265e-03 |
2.120e+00 |
Auger electron |
|
1.92014e-03 |
2.037e-01 |
Auger electron |
|
2.24838e-03 |
1.016e-02 |
Auger electron |
|
6.66310e-03 |
1.767e-01 |
Conversion electron |
|
7.27953e-03 |
5.820e-01 |
Auger electron |
|
9.30000e-03 |
5.425e-02 |
Conversion electron |
|
9.33179e-03 |
2.402e-01 |
Auger electron |
|
1.14143e-02 |
2.418e-02 |
Auger electron |
|
1.17380e-02 |
1.475e-02 |
Conversion electron |
|
1.22870e-02 |
7.790e-02 |
Conversion electron |
|
1.40330e-02 |
8.920e-02 |
Conversion electron |
|
1.77380e-02 |
4.482e-02 |
Conversion electron |
|
2.29631e-02 |
4.599e-02 |
Conversion electron |
|
2.56000e-02 |
1.332e-02 |
Conversion electron |
|
2.89631e-02 |
1.152e-02 |
Conversion electron |
|
3.51380e-02 |
2.305e-02 |
Conversion electron |
|
3.56870e-02 |
1.207e-02 |
Conversion electron |
|
3.73380e-02 |
5.082e-02 |
Conversion electron |
|
3.74330e-02 |
1.044e-02 |
Conversion electron |
|
3.85850e-02 |
1.325e-02 |
Conversion electron |
|
4.63631e-02 |
1.110e-02 |
Conversion electron |
|
4.85631e-02 |
1.474e-02 |
Conversion electron |
|
5.14380e-02 |
2.563e-02 |
Conversion electron |
|
5.27836e-02 |
2.243e-02 |
Auger electron |
|
6.32891e-02 |
1.202e-02 |
Auger electron |
|
1.81985e-01 |
1.390e-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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