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Radionuclide Dosimetric Data Sheets
Platinum-186
Summary data
General
Classification
Isotope: Pt-186
Atomic number (Z): 78
Mass number (A): 186
Neutron number (N): 108
Radioactive decay
Decay modes: α, Electron capture
Half-life: 2.08 [h]
Decay constant: 9.2568e-05 [1/s]
Daughters: Ir-186m (81.9%), Ir-186 (18.1%), Os-182 (0.0001%)
Radioactive daughters: Ir-186m, Ir-186, Os-182
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.04513 [MeV]
Mean photon energy: 0.68442 [MeV]
Air kerma rate constant, Γ10: 3.406e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 3.406e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 7.231e-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-:
7.231e-15 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 1.097e-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/Pt-186 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/Pt-186 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/Pt-186 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
4.49202e-05 |
1.209e+01 |
X-ray |
|
1.99399e-03 |
5.398e-02 |
X-ray |
|
8.06830e-03 |
1.083e-02 |
X-ray |
|
9.09081e-03 |
1.871e-02 |
X-ray |
|
9.16923e-03 |
1.649e-01 |
X-ray |
|
1.07358e-02 |
9.723e-02 |
X-ray |
|
1.09194e-02 |
3.019e-02 |
X-ray |
|
1.25485e-02 |
1.875e-02 |
X-ray |
|
5.42000e-02 |
1.176e-02 |
Gamma |
|
6.34550e-02 |
2.853e-01 |
X-ray |
|
6.50999e-02 |
4.893e-01 |
X-ray |
|
7.34138e-02 |
5.337e-02 |
X-ray |
|
7.37750e-02 |
1.032e-01 |
X-ray |
|
7.57436e-02 |
1.236e-02 |
X-ray |
|
7.58295e-02 |
2.408e-02 |
X-ray |
|
1.80700e-01 |
1.148e-02 |
Gamma |
|
1.80700e-01 |
1.148e-02 |
Gamma |
|
2.05500e-01 |
1.400e-02 |
Gamma |
|
2.10400e-01 |
2.800e-02 |
Gamma |
|
2.56200e-01 |
1.176e-02 |
Gamma |
|
2.80900e-01 |
1.652e-02 |
Gamma |
|
3.66800e-01 |
2.044e-02 |
Gamma |
|
5.79300e-01 |
1.484e-02 |
Gamma |
|
6.11500e-01 |
5.740e-02 |
Gamma |
|
6.35300e-01 |
2.604e-02 |
Gamma |
|
6.89400e-01 |
7.028e-01 |
Gamma |
|
3.53830e-05 |
2.362e+00 |
Auger electron |
|
1.71237e-04 |
4.036e+00 |
Auger electron |
|
3.51178e-04 |
7.673e-01 |
Auger electron |
|
3.62644e-04 |
1.806e-01 |
Auger electron |
|
4.86001e-04 |
9.263e-02 |
Conversion electron |
|
6.24875e-04 |
2.817e-01 |
Auger electron |
|
1.64241e-03 |
1.828e+00 |
Auger electron |
|
1.84270e-03 |
1.611e-01 |
Auger electron |
|
1.94000e-03 |
1.750e-01 |
Conversion electron |
|
7.06785e-03 |
5.471e-01 |
Auger electron |
|
9.04215e-03 |
2.218e-01 |
Auger electron |
|
1.10463e-02 |
2.203e-02 |
Auger electron |
|
2.54860e-02 |
1.549e-02 |
Conversion electron |
|
2.91040e-02 |
2.236e-02 |
Conversion electron |
|
4.08040e-02 |
5.476e-02 |
Conversion electron |
|
5.13520e-02 |
2.738e-02 |
Auger electron |
|
5.16610e-02 |
1.567e-02 |
Conversion electron |
|
6.15157e-02 |
1.458e-02 |
Auger electron |
|
6.34040e-02 |
1.376e-02 |
Conversion electron |
|
1.04386e-01 |
1.131e-02 |
Conversion electron |
|
1.04386e-01 |
1.131e-02 |
Conversion electron |
|
1.34086e-01 |
1.805e-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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