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Radionuclide Dosimetric Data Sheets
Iridium-183
Summary data
General
Classification
Isotope: Ir-183
Atomic number (Z): 77
Mass number (A): 183
Neutron number (N): 106
Radioactive decay
Decay modes: β+, Electron capture
Half-life: 58.0 [m]
Decay constant: 1.9918e-04 [1/s]
Daughters: Os-183m (71.0%), Os-183 (29.0%)
Radioactive daughters: Os-183m, Os-183
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.15157 [MeV]
Mean photon energy: 1.18886 [MeV]
Air kerma rate constant, Γ10: 4.905e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 5.230e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 2.428e-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-:
2.428e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 1.905e-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/Ir-183 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/Ir-183 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/Ir-183 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/Ir-183 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
4.40576e-05 |
1.449e+01 |
X-ray |
|
1.92069e-03 |
6.305e-02 |
X-ray |
|
7.84700e-03 |
1.292e-02 |
X-ray |
|
8.83249e-03 |
2.222e-02 |
X-ray |
|
8.90608e-03 |
1.959e-01 |
X-ray |
|
1.03795e-02 |
1.323e-01 |
X-ray |
|
1.05947e-02 |
3.548e-02 |
X-ray |
|
1.21269e-02 |
2.521e-02 |
X-ray |
|
6.16420e-02 |
3.238e-01 |
X-ray |
|
6.31890e-02 |
5.577e-01 |
X-ray |
|
7.12758e-02 |
6.055e-02 |
X-ray |
|
7.16144e-02 |
1.170e-01 |
X-ray |
|
7.35200e-02 |
1.394e-02 |
X-ray |
|
7.35997e-02 |
2.711e-02 |
X-ray |
|
8.75000e-02 |
5.616e-02 |
Gamma |
|
1.02200e-01 |
1.456e-02 |
Gamma |
|
1.36800e-01 |
1.352e-02 |
Gamma |
|
1.94700e-01 |
1.560e-02 |
Gamma |
|
2.28600e-01 |
6.864e-02 |
Gamma |
|
2.36800e-01 |
1.664e-02 |
Gamma |
|
2.39900e-01 |
1.768e-02 |
Gamma |
|
2.54900e-01 |
1.248e-02 |
Gamma |
|
2.71300e-01 |
1.560e-02 |
Gamma |
|
2.82500e-01 |
4.888e-02 |
Gamma |
|
2.86100e-01 |
1.019e-02 |
Gamma |
|
3.42400e-01 |
2.184e-02 |
Gamma |
|
3.47800e-01 |
2.600e-02 |
Gamma |
|
3.92500e-01 |
1.040e-01 |
Gamma |
|
4.11500e-01 |
1.144e-02 |
Gamma |
|
4.98500e-01 |
1.248e-02 |
Gamma |
|
5.11000e-01 |
1.677e-01 |
Annihilation photon |
|
5.12500e-01 |
2.392e-02 |
Gamma |
|
6.17700e-01 |
1.872e-02 |
Gamma |
|
6.55400e-01 |
1.456e-02 |
Gamma |
|
7.31600e-01 |
2.912e-02 |
Gamma |
|
7.81300e-01 |
1.352e-02 |
Gamma |
|
8.00300e-01 |
2.808e-02 |
Gamma |
|
8.96800e-01 |
1.560e-02 |
Gamma |
|
1.04590e+00 |
1.040e-02 |
Gamma |
|
1.55950e+00 |
1.144e-02 |
Gamma |
|
1.63080e+00 |
1.768e-02 |
Gamma |
|
1.65280e+00 |
1.560e-02 |
Gamma |
|
1.75530e+00 |
1.144e-02 |
Gamma |
|
1.78700e+00 |
1.040e-02 |
Gamma |
|
1.90770e+00 |
1.144e-02 |
Gamma |
|
2.00060e+00 |
1.872e-02 |
Gamma |
|
9.81150e-01 |
2.881e-02 |
Positron |
|
2.96069e-05 |
2.822e+00 |
Auger electron |
|
1.63619e-04 |
4.813e+00 |
Auger electron |
|
3.33879e-04 |
9.593e-01 |
Auger electron |
|
3.43499e-04 |
1.935e-01 |
Auger electron |
|
6.17180e-04 |
2.956e-01 |
Auger electron |
|
1.58185e-03 |
2.304e+00 |
Auger electron |
|
1.75000e-03 |
6.949e-02 |
Conversion electron |
|
1.77863e-03 |
1.803e-01 |
Auger electron |
|
6.89091e-03 |
7.053e-01 |
Auger electron |
|
8.79034e-03 |
2.801e-01 |
Auger electron |
|
1.07193e-02 |
2.746e-02 |
Auger electron |
|
1.22483e-02 |
1.788e-02 |
Conversion electron |
|
1.31500e-02 |
1.028e-02 |
Conversion electron |
|
1.34340e-02 |
2.176e-01 |
Conversion electron |
|
2.21340e-02 |
3.069e-02 |
Conversion electron |
|
2.81340e-02 |
1.118e-02 |
Conversion electron |
|
3.35340e-02 |
1.584e-02 |
Conversion electron |
|
4.99348e-02 |
3.197e-02 |
Auger electron |
|
5.97656e-02 |
1.694e-02 |
Auger electron |
|
6.27340e-02 |
2.393e-02 |
Conversion electron |
|
7.45500e-02 |
3.185e-02 |
Conversion electron |
|
7.50760e-02 |
7.967e-02 |
Conversion electron |
|
7.66230e-02 |
7.034e-02 |
Conversion electron |
|
8.50483e-02 |
4.591e-02 |
Conversion electron |
|
8.75000e-02 |
1.319e-02 |
Conversion electron |
|
8.97760e-02 |
1.857e-02 |
Conversion electron |
|
9.13230e-02 |
1.609e-02 |
Conversion electron |
|
1.20634e-01 |
1.147e-02 |
Conversion electron |
|
1.54534e-01 |
1.143e-02 |
Conversion electron |
|
2.08434e-01 |
1.142e-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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