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Radionuclide Dosimetric Data Sheets
Osmium-183m
Summary data
General
Classification
Isotope: Os-183m
Atomic number (Z): 76
Mass number (A): 183
Neutron number (N): 107
Radioactive decay
Decay modes: β+, Electron capture, Internal
transition
Half-life: 9.9 [h]
Decay constant: 1.9449e-05 [1/s]
Daughters: Re-183 (85.0%), Os-183 (15.0%)
Radioactive daughters: Re-183, Os-183
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.04163 [MeV]
Mean photon energy: 1.0062 [MeV]
Air kerma rate constant, Γ10: 4.181e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 4.182e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 6.670e-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-:
6.670e-15 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 1.612e-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-183m 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-183m 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/Os-183m 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/Os-183m Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
3.76108e-05 |
7.651e+00 |
X-ray |
|
4.39905e-05 |
1.168e+00 |
X-ray |
|
1.84757e-03 |
3.081e-02 |
X-ray |
|
8.57622e-03 |
1.148e-02 |
X-ray |
|
8.64532e-03 |
1.013e-01 |
X-ray |
|
8.90609e-03 |
1.770e-02 |
X-ray |
|
1.00312e-02 |
6.121e-02 |
X-ray |
|
1.02735e-02 |
1.815e-02 |
X-ray |
|
1.17147e-02 |
1.153e-02 |
X-ray |
|
5.98631e-02 |
2.042e-01 |
X-ray |
|
6.13181e-02 |
3.531e-01 |
X-ray |
|
6.16420e-02 |
1.246e-02 |
X-ray |
|
6.31890e-02 |
2.146e-02 |
X-ray |
|
6.91788e-02 |
3.816e-02 |
X-ray |
|
6.94956e-02 |
7.375e-02 |
X-ray |
|
7.14134e-02 |
1.697e-02 |
X-ray |
|
4.84490e-01 |
2.213e-02 |
Gamma |
|
8.78910e-01 |
1.968e-02 |
Gamma |
|
9.54850e-01 |
1.381e-02 |
Gamma |
|
1.03486e+00 |
6.022e-02 |
Gamma |
|
1.10192e+00 |
4.896e-01 |
Gamma |
|
1.10790e+00 |
2.236e-01 |
Gamma |
|
2.73020e-05 |
1.505e+00 |
Auger electron |
|
2.96559e-05 |
2.281e-01 |
Auger electron |
|
1.62301e-04 |
2.566e+00 |
Auger electron |
|
1.63154e-04 |
3.874e-01 |
Auger electron |
|
3.25142e-04 |
5.031e-01 |
Auger electron |
|
3.28499e-04 |
7.823e-02 |
Auger electron |
|
3.29031e-04 |
9.536e-02 |
Auger electron |
|
3.42093e-04 |
1.542e-02 |
Auger electron |
|
5.35585e-04 |
2.521e-02 |
Auger electron |
|
5.68252e-04 |
1.553e-01 |
Auger electron |
|
1.52536e-03 |
1.216e+00 |
Auger electron |
|
1.57883e-03 |
1.860e-01 |
Auger electron |
|
1.71502e-03 |
8.625e-02 |
Auger electron |
|
1.77467e-03 |
1.456e-02 |
Auger electron |
|
6.67921e-03 |
3.763e-01 |
Auger electron |
|
6.75288e-03 |
5.512e-02 |
Auger electron |
|
8.50475e-03 |
1.467e-01 |
Auger electron |
|
8.64364e-03 |
2.181e-02 |
Auger electron |
|
1.03595e-02 |
1.419e-02 |
Auger electron |
|
4.24940e-02 |
2.054e-02 |
Conversion electron |
|
4.85493e-02 |
2.077e-02 |
Auger electron |
|
5.47320e-02 |
1.762e-02 |
Conversion electron |
|
5.80540e-02 |
1.094e-02 |
Auger electron |
|
9.66440e-02 |
4.481e-02 |
Conversion electron |
|
1.57760e-01 |
2.775e-02 |
Conversion electron |
|
1.59833e-01 |
4.171e-02 |
Conversion electron |
|
1.68258e-01 |
2.259e-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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