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Radionuclide Dosimetric Data Sheets
Uranium-233
Summary data
General
Classification
Isotope: U-233
Atomic number (Z): 92
Mass number (A): 233
Neutron number (N): 141
Radioactive decay
Decay modes: α
Half-life: 159200.0 [y]
Decay constant: 1.3797e-13 [1/s]
Daughters: Th-229 (100.0%)
Radioactive daughters: Th-229
Dosimetric constants
Mean alpha energy: 4.9012 [MeV]
Mean electron energy: 0.0059 [MeV]
Mean photon energy: 0.00129 [MeV]
Air kerma rate constant, Γ10: 1.560e-18 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 1.560e-18 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 7.862e-13 [Gy·kg/Bq·s]
Equilibrium dose constant for alphas, Δα: 7.853e-13
[Gy·kg/Bq·s]
Equilibrium dose constant for betas/electrons, Δβ-,β+,e-:
9.453e-16 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 2.067e-16
[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/U-233 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/U-233 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/U-233 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
8.22630e-05 |
1.852e+00 |
X-ray |
|
3.06638e-03 |
1.016e-02 |
X-ray |
|
1.29764e-02 |
2.051e-02 |
X-ray |
|
1.62776e-02 |
1.617e-02 |
X-ray |
|
5.12979e-05 |
4.472e-01 |
Auger electron |
|
1.33473e-04 |
4.930e-01 |
Auger electron |
|
1.88569e-04 |
2.793e-01 |
Auger electron |
|
5.14040e-04 |
7.630e-02 |
Auger electron |
|
1.41231e-03 |
3.819e-02 |
Auger electron |
|
2.31971e-03 |
1.594e-01 |
Auger electron |
|
2.73592e-03 |
2.739e-02 |
Auger electron |
|
8.71400e-03 |
1.237e-02 |
Conversion electron |
|
9.91027e-03 |
3.920e-02 |
Auger electron |
|
1.30510e-02 |
1.954e-02 |
Auger electron |
|
2.19620e-02 |
2.614e-02 |
Conversion electron |
|
2.26600e-02 |
3.388e-02 |
Conversion electron |
|
2.61250e-02 |
2.882e-02 |
Conversion electron |
|
3.84038e-02 |
2.342e-02 |
Conversion electron |
|
4.72931e+00 |
1.611e-02 |
Alpha |
|
4.78306e+00 |
1.321e-01 |
Alpha |
|
4.82477e+00 |
8.446e-01 |
Alpha |
|
8.26617e-02 |
1.611e-02 |
Alpha recoil |
|
8.36012e-02 |
1.321e-01 |
Alpha recoil |
|
8.43302e-02 |
8.446e-01 |
Alpha recoil |
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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