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Radionuclide Dosimetric Data Sheets
Osmium-190m
Summary data
General
Classification
Isotope: Os-190m
Atomic number (Z): 76
Mass number (A): 190
Neutron number (N): 114
Radioactive decay
Decay modes: Internal transition
Half-life: 9.9 [m]
Decay constant: 1.1669e-03 [1/s]
Daughters: Os-190 (100.0%)
Radioactive daughters: None
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.11655 [MeV]
Mean photon energy: 1.58935 [MeV]
Air kerma rate constant, Γ10: 6.678e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 6.678e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 1.867e-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-:
1.867e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 2.546e-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/Os-190m 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/Os-190m 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/Os-190m Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
4.39149e-05 |
1.134e+01 |
X-ray |
|
1.92035e-03 |
4.885e-02 |
X-ray |
|
8.83249e-03 |
1.677e-02 |
X-ray |
|
8.90610e-03 |
1.478e-01 |
X-ray |
|
1.01598e-02 |
1.009e-02 |
X-ray |
|
1.03795e-02 |
6.597e-02 |
X-ray |
|
1.04983e-02 |
1.224e-02 |
X-ray |
|
1.05947e-02 |
2.678e-02 |
X-ray |
|
1.21269e-02 |
1.257e-02 |
X-ray |
|
6.16420e-02 |
5.704e-02 |
X-ray |
|
6.31890e-02 |
9.826e-02 |
X-ray |
|
7.12758e-02 |
1.067e-02 |
X-ray |
|
7.16144e-02 |
2.062e-02 |
X-ray |
|
1.86700e-01 |
7.017e-01 |
Gamma |
|
3.61200e-01 |
9.487e-01 |
Gamma |
|
5.02500e-01 |
9.777e-01 |
Gamma |
|
6.16500e-01 |
9.862e-01 |
Gamma |
|
2.96353e-05 |
2.228e+00 |
Auger electron |
|
1.63465e-04 |
3.755e+00 |
Auger electron |
|
3.36341e-04 |
7.744e-01 |
Auger electron |
|
3.47147e-04 |
1.534e-01 |
Auger electron |
|
5.15723e-04 |
3.685e-01 |
Auger electron |
|
1.58045e-03 |
1.785e+00 |
Auger electron |
|
1.77728e-03 |
1.395e-01 |
Auger electron |
|
6.85402e-03 |
5.048e-01 |
Auger electron |
|
8.75460e-03 |
2.003e-01 |
Auger electron |
|
1.06875e-02 |
1.965e-02 |
Auger electron |
|
2.59500e-02 |
4.051e-01 |
Conversion electron |
|
2.64760e-02 |
8.953e-02 |
Conversion electron |
|
2.80230e-02 |
2.441e-01 |
Conversion electron |
|
3.64483e-02 |
2.004e-01 |
Conversion electron |
|
3.89000e-02 |
6.014e-02 |
Conversion electron |
|
1.12634e-01 |
1.424e-01 |
Conversion electron |
|
1.73750e-01 |
1.679e-02 |
Conversion electron |
|
1.74276e-01 |
5.970e-02 |
Conversion electron |
|
1.75823e-01 |
4.111e-02 |
Conversion electron |
|
1.84248e-01 |
2.976e-02 |
Conversion electron |
|
2.87134e-01 |
3.534e-02 |
Conversion electron |
|
4.28434e-01 |
1.670e-02 |
Conversion electron |
|
5.42434e-01 |
1.073e-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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