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Radionuclide Dosimetric Data Sheets
Osmium-180
Summary data
General
Classification
Isotope: Os-180
Atomic number (Z): 76
Mass number (A): 180
Neutron number (N): 104
Radioactive decay
Decay modes: β+, Electron capture
Half-life: 21.5 [m]
Decay constant: 5.3732e-04 [1/s]
Daughters: Re-180 (100.0%)
Radioactive daughters: Re-180
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.02984 [MeV]
Mean photon energy: 0.12653 [MeV]
Air kerma rate constant, Γ10: 1.705e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 1.707e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 4.781e-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-:
4.781e-15 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 2.027e-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/Os-180 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-180 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-180 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
3.76228e-05 |
1.449e+01 |
X-ray |
|
1.84747e-03 |
5.844e-02 |
X-ray |
|
7.62640e-03 |
1.249e-02 |
X-ray |
|
8.57621e-03 |
2.135e-02 |
X-ray |
|
8.64531e-03 |
1.883e-01 |
X-ray |
|
1.00312e-02 |
1.155e-01 |
X-ray |
|
1.02735e-02 |
3.375e-02 |
X-ray |
|
1.17147e-02 |
2.176e-02 |
X-ray |
|
2.01000e-02 |
1.220e-01 |
Gamma |
|
5.98631e-02 |
2.352e-01 |
X-ray |
|
6.13181e-02 |
4.066e-01 |
X-ray |
|
6.91788e-02 |
4.394e-02 |
X-ray |
|
6.94956e-02 |
8.492e-02 |
X-ray |
|
7.13392e-02 |
1.006e-02 |
X-ray |
|
7.14134e-02 |
1.954e-02 |
X-ray |
|
7.46000e-02 |
2.947e-02 |
Gamma |
|
3.29000e-01 |
1.515e-02 |
Gamma |
|
4.01500e-01 |
1.800e-02 |
Gamma |
|
4.50400e-01 |
1.568e-02 |
Gamma |
|
6.67000e-01 |
2.602e-02 |
Gamma |
|
7.17400e-01 |
3.040e-02 |
Gamma |
|
2.73009e-05 |
2.849e+00 |
Auger electron |
|
1.62317e-04 |
4.859e+00 |
Auger electron |
|
3.25351e-04 |
9.482e-01 |
Auger electron |
|
3.29366e-04 |
1.809e-01 |
Auger electron |
|
5.60250e-04 |
3.099e-01 |
Auger electron |
|
1.52501e-03 |
2.306e+00 |
Auger electron |
|
1.71416e-03 |
1.633e-01 |
Auger electron |
|
2.74400e-03 |
1.914e-02 |
Conversion electron |
|
6.68678e-03 |
7.052e-01 |
Auger electron |
|
7.59200e-03 |
1.317e-01 |
Conversion electron |
|
8.10700e-03 |
1.707e-01 |
Conversion electron |
|
8.51309e-03 |
2.750e-01 |
Auger electron |
|
9.56200e-03 |
2.486e-01 |
Conversion electron |
|
1.03691e-02 |
2.661e-02 |
Auger electron |
|
1.77395e-02 |
1.328e-01 |
Conversion electron |
|
2.01000e-02 |
3.571e-02 |
Conversion electron |
|
3.72920e-02 |
1.654e-02 |
Conversion electron |
|
4.18920e-02 |
1.094e-02 |
Conversion electron |
|
4.85493e-02 |
2.392e-02 |
Auger electron |
|
5.80540e-02 |
1.260e-02 |
Auger 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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