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Radionuclide Dosimetric Data Sheets
Platinum-197m
Summary data
General
Classification
Isotope: Pt-197m
Atomic number (Z): 78
Mass number (A): 197
Neutron number (N): 119
Radioactive decay
Decay modes: β-, Internal transition
Half-life: 95.41 [m]
Decay constant: 1.2108e-04 [1/s]
Daughters: Pt-197 (96.7%), Au-197 (3.3%)
Radioactive daughters: Pt-197
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.32499 [MeV]
Mean photon energy: 0.08389 [MeV]
Air kerma rate constant, Γ10: 1.472e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 1.472e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 5.207e-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-:
5.207e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 1.344e-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/Pt-197m 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-197m 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-197m 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-197m Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.01444e-05 |
2.342e+01 |
X-ray |
|
1.11103e-05 |
5.141e-01 |
X-ray |
|
2.07074e-03 |
6.591e-02 |
X-ray |
|
8.29381e-03 |
1.245e-02 |
X-ray |
|
9.35460e-03 |
2.159e-02 |
X-ray |
|
9.43801e-03 |
1.903e-01 |
X-ray |
|
1.11006e-02 |
1.534e-01 |
X-ray |
|
1.12510e-02 |
3.520e-02 |
X-ray |
|
1.29799e-02 |
2.992e-02 |
X-ray |
|
5.31000e-02 |
1.079e-02 |
Gamma |
|
6.53020e-02 |
1.361e-01 |
X-ray |
|
6.70480e-02 |
2.325e-01 |
X-ray |
|
7.55931e-02 |
2.546e-02 |
X-ray |
|
7.59780e-02 |
4.924e-02 |
X-ray |
|
7.81028e-02 |
1.158e-02 |
X-ray |
|
2.79000e-01 |
2.356e-02 |
Gamma |
|
3.46500e-01 |
1.112e-01 |
Gamma |
|
2.21828e-01 |
3.300e-02 |
Beta |
|
3.74634e-05 |
4.986e+00 |
Auger electron |
|
4.01470e-05 |
1.132e-01 |
Auger electron |
|
5.59983e-05 |
8.054e+00 |
Auger electron |
|
6.42936e-05 |
1.733e-01 |
Auger electron |
|
1.71440e-04 |
4.257e+00 |
Auger electron |
|
1.75171e-04 |
9.227e-02 |
Auger electron |
|
4.09149e-04 |
7.769e-01 |
Auger electron |
|
4.24142e-04 |
1.811e-02 |
Auger electron |
|
8.19013e-04 |
2.021e-01 |
Auger electron |
|
1.69961e-03 |
2.078e+00 |
Auger electron |
|
1.76314e-03 |
4.525e-02 |
Auger electron |
|
1.91247e-03 |
1.986e-01 |
Auger electron |
|
7.30786e-03 |
6.320e-01 |
Auger electron |
|
7.65422e-03 |
1.365e-02 |
Auger electron |
|
9.35938e-03 |
2.609e-01 |
Auger electron |
|
1.14393e-02 |
2.626e-02 |
Auger electron |
|
3.97870e-02 |
3.530e-01 |
Conversion electron |
|
4.15330e-02 |
3.580e-01 |
Conversion electron |
|
5.04631e-02 |
1.854e-01 |
Conversion electron |
|
5.27836e-02 |
1.271e-02 |
Auger electron |
|
5.31000e-02 |
5.367e-02 |
Conversion electron |
|
1.16224e-01 |
1.348e-02 |
Conversion electron |
|
2.67885e-01 |
4.870e-01 |
Conversion electron |
|
3.32638e-01 |
1.505e-01 |
Conversion electron |
|
3.33187e-01 |
3.832e-02 |
Conversion electron |
|
3.34933e-01 |
8.680e-02 |
Conversion electron |
|
3.43863e-01 |
7.459e-02 |
Conversion electron |
|
3.46500e-01 |
2.290e-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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