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Radionuclide Dosimetric Data Sheets
Platinum-195m
Summary data
General
Classification
Isotope: Pt-195m
Atomic number (Z): 78
Mass number (A): 195
Neutron number (N): 117
Radioactive decay
Decay modes: Internal transition
Half-life: 4.02 [d]
Decay constant: 1.9957e-06 [1/s]
Daughters: Pt-195 (100.0%)
Radioactive daughters: None
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.18449 [MeV]
Mean photon energy: 0.07716 [MeV]
Air kerma rate constant, Γ10: 1.641e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 1.641e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 2.956e-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-:
2.956e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 1.236e-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-195m 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-195m 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-195m Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.01393e-05 |
3.951e+01 |
X-ray |
|
2.06757e-03 |
1.112e-01 |
X-ray |
|
8.29381e-03 |
2.178e-02 |
X-ray |
|
9.35459e-03 |
3.777e-02 |
X-ray |
|
9.43802e-03 |
3.329e-01 |
X-ray |
|
1.08400e-02 |
2.412e-02 |
X-ray |
|
1.11006e-02 |
1.221e-01 |
X-ray |
|
1.12251e-02 |
2.832e-02 |
X-ray |
|
1.12510e-02 |
6.157e-02 |
X-ray |
|
1.29799e-02 |
2.382e-02 |
X-ray |
|
3.08900e-02 |
2.274e-02 |
Gamma |
|
6.53020e-02 |
2.273e-01 |
X-ray |
|
6.70480e-02 |
3.883e-01 |
X-ray |
|
7.55931e-02 |
4.254e-02 |
X-ray |
|
7.59780e-02 |
8.226e-02 |
X-ray |
|
7.81028e-02 |
1.934e-02 |
X-ray |
|
9.89000e-02 |
1.140e-01 |
Gamma |
|
1.29790e-01 |
2.827e-02 |
Gamma |
|
3.74776e-05 |
8.445e+00 |
Auger electron |
|
5.60684e-05 |
1.356e+01 |
Auger electron |
|
1.71031e-04 |
7.129e+00 |
Auger electron |
|
4.04964e-04 |
1.333e+00 |
Auger electron |
|
5.95018e-04 |
7.638e-01 |
Auger electron |
|
1.69365e-03 |
3.506e+00 |
Auger electron |
|
1.90356e-03 |
3.332e-01 |
Auger electron |
|
2.22628e-03 |
1.645e-02 |
Auger electron |
|
7.20238e-03 |
9.817e-01 |
Auger electron |
|
9.25254e-03 |
4.045e-01 |
Auger electron |
|
1.13340e-02 |
4.069e-02 |
Auger electron |
|
1.70280e-02 |
6.157e-01 |
Conversion electron |
|
1.75770e-02 |
6.429e-02 |
Conversion electron |
|
1.93230e-02 |
1.166e-02 |
Conversion electron |
|
2.02850e-02 |
6.683e-01 |
Conversion electron |
|
2.82531e-02 |
1.607e-01 |
Conversion electron |
|
3.08900e-02 |
4.948e-02 |
Conversion electron |
|
5.08850e-02 |
1.311e-01 |
Conversion electron |
|
5.11750e-02 |
1.315e-02 |
Conversion electron |
|
5.27836e-02 |
2.123e-02 |
Auger electron |
|
6.32891e-02 |
1.137e-02 |
Auger electron |
|
8.50380e-02 |
1.005e-01 |
Conversion electron |
|
8.55870e-02 |
1.284e-02 |
Conversion electron |
|
9.62631e-02 |
2.736e-02 |
Conversion electron |
|
1.15638e-01 |
1.750e-01 |
Conversion electron |
|
1.16187e-01 |
3.864e-02 |
Conversion electron |
|
1.16477e-01 |
1.449e-02 |
Conversion electron |
|
1.17933e-01 |
4.008e-01 |
Conversion electron |
|
1.18223e-01 |
1.124e-02 |
Conversion electron |
|
1.26863e-01 |
1.955e-01 |
Conversion electron |
|
1.29500e-01 |
6.016e-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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