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Radionuclide Dosimetric Data Sheets
Platinum-187
Summary data
General
Classification
Isotope: Pt-187
Atomic number (Z): 78
Mass number (A): 187
Neutron number (N): 109
Radioactive decay
Decay modes: β+, Electron capture
Half-life: 2.35 [h]
Decay constant: 8.1932e-05 [1/s]
Daughters: Ir-187 (100.0%)
Radioactive daughters: Ir-187
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.1549 [MeV]
Mean photon energy: 0.61825 [MeV]
Air kerma rate constant, Γ10: 3.316e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 3.549e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 2.482e-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-:
2.482e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 9.905e-14
[Gy·kg/Bq·s]
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-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/Pt-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/Pt-187 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
4.54754e-05 |
1.592e+01 |
X-ray |
|
1.99458e-03 |
7.507e-02 |
X-ray |
|
8.06830e-03 |
1.505e-02 |
X-ray |
|
9.09081e-03 |
2.599e-02 |
X-ray |
|
9.16923e-03 |
2.292e-01 |
X-ray |
|
1.07358e-02 |
1.632e-01 |
X-ray |
|
1.09194e-02 |
4.195e-02 |
X-ray |
|
1.25485e-02 |
3.148e-02 |
X-ray |
|
6.34550e-02 |
3.854e-01 |
X-ray |
|
6.50999e-02 |
6.610e-01 |
X-ray |
|
7.34138e-02 |
7.209e-02 |
X-ray |
|
7.37750e-02 |
1.394e-01 |
X-ray |
|
7.57436e-02 |
1.670e-02 |
X-ray |
|
7.58295e-02 |
3.253e-02 |
X-ray |
|
8.30500e-02 |
2.024e-02 |
Gamma |
|
1.06430e-01 |
8.800e-02 |
Gamma |
|
1.10050e-01 |
5.720e-02 |
Gamma |
|
1.21990e-01 |
2.904e-02 |
Gamma |
|
1.86200e-01 |
1.320e-02 |
Gamma |
|
1.86900e-01 |
3.872e-02 |
Gamma |
|
2.01500e-01 |
6.424e-02 |
Gamma |
|
2.47610e-01 |
3.696e-02 |
Gamma |
|
2.82100e-01 |
2.376e-02 |
Gamma |
|
2.84870e-01 |
2.640e-02 |
Gamma |
|
2.84870e-01 |
1.232e-02 |
Gamma |
|
2.84870e-01 |
1.672e-02 |
Gamma |
|
3.00300e-01 |
1.100e-02 |
Gamma |
|
3.04750e-01 |
4.312e-02 |
Gamma |
|
3.11760e-01 |
1.848e-02 |
Gamma |
|
4.00800e-01 |
1.584e-02 |
Gamma |
|
4.27200e-01 |
2.200e-02 |
Gamma |
|
4.80600e-01 |
1.144e-02 |
Gamma |
|
4.86600e-01 |
1.232e-02 |
Gamma |
|
5.07800e-01 |
1.320e-02 |
Gamma |
|
5.11000e-01 |
1.201e-01 |
Annihilation photon |
|
5.11700e-01 |
1.408e-02 |
Gamma |
|
6.22500e-01 |
1.320e-02 |
Gamma |
|
6.29600e-01 |
2.728e-02 |
Gamma |
|
7.09200e-01 |
5.192e-02 |
Gamma |
|
7.12600e-01 |
1.021e-02 |
Gamma |
|
7.92700e-01 |
1.144e-02 |
Gamma |
|
8.16500e-01 |
1.056e-02 |
Gamma |
|
8.19300e-01 |
3.696e-02 |
Gamma |
|
8.95400e-01 |
1.760e-02 |
Gamma |
|
9.12700e-01 |
1.760e-02 |
Gamma |
|
9.77900e-01 |
1.584e-02 |
Gamma |
|
1.14550e+00 |
1.672e-02 |
Gamma |
|
1.14940e+00 |
1.056e-02 |
Gamma |
|
1.15700e+00 |
1.144e-02 |
Gamma |
|
1.25540e+00 |
2.376e-02 |
Gamma |
|
7.59391e-01 |
1.081e-02 |
Positron |
|
8.48536e-01 |
1.072e-02 |
Positron |
|
3.53915e-05 |
3.028e+00 |
Auger electron |
|
1.71110e-04 |
5.252e+00 |
Auger electron |
|
3.50539e-04 |
1.054e+00 |
Auger electron |
|
3.59510e-04 |
2.319e-01 |
Auger electron |
|
7.08516e-04 |
2.875e-01 |
Auger electron |
|
1.64384e-03 |
2.542e+00 |
Auger electron |
|
1.84481e-03 |
2.245e-01 |
Auger electron |
|
2.15168e-03 |
1.116e-02 |
Auger electron |
|
3.04600e-03 |
1.367e-02 |
Conversion electron |
|
6.73600e-03 |
1.797e-01 |
Conversion electron |
|
7.09047e-03 |
7.829e-01 |
Auger electron |
|
9.06445e-03 |
3.175e-01 |
Auger electron |
|
1.10671e-02 |
3.154e-02 |
Auger electron |
|
3.01160e-02 |
6.054e-02 |
Conversion electron |
|
3.37360e-02 |
1.705e-01 |
Conversion electron |
|
4.56760e-02 |
8.426e-02 |
Conversion electron |
|
5.13520e-02 |
3.698e-02 |
Auger electron |
|
6.15157e-02 |
1.970e-02 |
Auger electron |
|
6.26940e-02 |
1.779e-02 |
Conversion electron |
|
6.96540e-02 |
2.677e-02 |
Conversion electron |
|
9.35710e-02 |
1.018e-01 |
Conversion electron |
|
9.52160e-02 |
8.606e-02 |
Conversion electron |
|
9.66540e-02 |
2.504e-02 |
Conversion electron |
|
9.71910e-02 |
1.980e-02 |
Conversion electron |
|
9.88360e-02 |
1.493e-02 |
Conversion electron |
|
1.03891e-01 |
5.042e-02 |
Conversion electron |
|
1.06430e-01 |
1.453e-02 |
Conversion electron |
|
1.07511e-01 |
1.472e-02 |
Conversion electron |
|
1.08594e-01 |
1.251e-02 |
Conversion electron |
|
1.71296e-01 |
1.523e-02 |
Conversion electron |
|
1.73341e-01 |
2.130e-02 |
Conversion electron |
|
1.74986e-01 |
1.179e-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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