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Radionuclide Dosimetric Data Sheets
Xenon-133m
Summary data
General
Classification
Isotope: Xe-133m
Atomic number (Z): 54
Mass number (A): 133
Neutron number (N): 79
Radioactive decay
Decay modes: Internal transition
Half-life: 2.19 [d]
Decay constant: 3.6633e-06 [1/s]
Daughters: Xe-133 (100.0%)
Radioactive daughters: Xe-133
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.19235 [MeV]
Mean photon energy: 0.04097 [MeV]
Air kerma rate constant, Γ10: 4.074e-18 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 4.074e-18 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 3.082e-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-:
3.082e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 6.564e-15
[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/Xe-133m 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/Xe-133m 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/Xe-133m Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.66184e-05 |
1.052e+01 |
X-ray |
|
4.09719e-03 |
3.343e-02 |
X-ray |
|
4.41300e-03 |
1.859e-02 |
X-ray |
|
2.94521e-02 |
1.617e-01 |
X-ray |
|
2.97812e-02 |
2.995e-01 |
X-ray |
|
3.35665e-02 |
2.812e-02 |
X-ray |
|
3.36295e-02 |
5.451e-02 |
X-ray |
|
3.44080e-02 |
1.150e-02 |
X-ray |
|
2.33221e-01 |
1.000e-01 |
Gamma |
|
2.62184e-05 |
1.645e+00 |
Auger electron |
|
3.62499e-05 |
5.001e+00 |
Auger electron |
|
1.23565e-04 |
6.221e-01 |
Auger electron |
|
3.28094e-04 |
1.243e-01 |
Auger electron |
|
5.05391e-04 |
1.364e+00 |
Auger electron |
|
6.18026e-04 |
7.815e-02 |
Auger electron |
|
3.32701e-03 |
5.355e-01 |
Auger electron |
|
4.00476e-03 |
1.589e-01 |
Auger electron |
|
4.70982e-03 |
1.208e-02 |
Auger electron |
|
2.44715e-02 |
4.547e-02 |
Auger electron |
|
2.86854e-02 |
2.034e-02 |
Auger electron |
|
1.98665e-01 |
6.318e-01 |
Conversion electron |
|
2.27804e-01 |
1.201e-01 |
Conversion electron |
|
2.28117e-01 |
2.598e-02 |
Conversion electron |
|
2.28446e-01 |
6.395e-02 |
Conversion electron |
|
2.32294e-01 |
4.702e-02 |
Conversion electron |
|
2.33221e-01 |
1.159e-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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