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Radionuclide Dosimetric Data Sheets
Xenon-120
Summary data
General
Classification
Isotope: Xe-120
Atomic number (Z): 54
Mass number (A): 120
Neutron number (N): 66
Radioactive decay
Decay modes: β+, Electron capture
Half-life: 40.0 [m]
Decay constant: 2.8881e-04 [1/s]
Daughters: I-120 (100.0%)
Radioactive daughters: I-120
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.0461 [MeV]
Mean photon energy: 0.40146 [MeV]
Air kerma rate constant, Γ10: 2.207e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 2.228e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 7.386e-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-:
7.386e-15 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 6.432e-14
[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-120 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-120 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/Xe-120 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/Xe-120 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.52639e-05 |
2.272e+01 |
X-ray |
|
3.92520e-03 |
6.261e-02 |
X-ray |
|
4.21605e-03 |
3.720e-02 |
X-ray |
|
2.51000e-02 |
2.904e-01 |
Gamma |
|
2.83065e-02 |
3.031e-01 |
X-ray |
|
2.86096e-02 |
5.626e-01 |
X-ray |
|
3.22368e-02 |
5.233e-02 |
X-ray |
|
3.22942e-02 |
1.015e-01 |
X-ray |
|
3.30185e-02 |
1.091e-02 |
X-ray |
|
3.30298e-02 |
2.135e-02 |
X-ray |
|
7.26000e-02 |
8.800e-02 |
Gamma |
|
7.72000e-02 |
3.872e-02 |
Gamma |
|
8.98000e-02 |
1.751e-02 |
Gamma |
|
9.90000e-02 |
1.540e-02 |
Gamma |
|
1.28800e-01 |
1.540e-02 |
Gamma |
|
1.76000e-01 |
4.400e-02 |
Gamma |
|
1.78100e-01 |
6.600e-02 |
Gamma |
|
2.95600e-01 |
1.100e-02 |
Gamma |
|
3.35900e-01 |
1.021e-02 |
Gamma |
|
4.24200e-01 |
1.188e-02 |
Gamma |
|
4.49200e-01 |
1.619e-02 |
Gamma |
|
5.11000e-01 |
1.117e-02 |
Annihilation photon |
|
5.29400e-01 |
1.346e-02 |
Gamma |
|
5.55600e-01 |
1.452e-02 |
Gamma |
|
5.90400e-01 |
1.540e-02 |
Gamma |
|
6.31100e-01 |
1.021e-02 |
Gamma |
|
6.78900e-01 |
1.602e-02 |
Gamma |
|
7.48400e-01 |
1.038e-02 |
Gamma |
|
7.53300e-01 |
1.417e-02 |
Gamma |
|
7.62500e-01 |
4.435e-02 |
Gamma |
|
7.93400e-01 |
1.276e-02 |
Gamma |
|
9.65500e-01 |
1.170e-02 |
Gamma |
|
2.71295e-05 |
3.432e+00 |
Auger electron |
|
2.89708e-05 |
1.094e+01 |
Auger electron |
|
1.25161e-04 |
1.271e+00 |
Auger electron |
|
3.20649e-04 |
2.938e-01 |
Auger electron |
|
4.77619e-04 |
2.872e+00 |
Auger electron |
|
5.80277e-04 |
1.371e-01 |
Auger electron |
|
3.21796e-03 |
1.124e+00 |
Auger electron |
|
3.85441e-03 |
3.326e-01 |
Auger electron |
|
4.51572e-03 |
2.429e-02 |
Auger electron |
|
7.73600e-03 |
1.234e-02 |
Conversion electron |
|
7.73600e-03 |
5.706e-02 |
Conversion electron |
|
1.83360e-02 |
1.884e-02 |
Conversion electron |
|
1.99381e-02 |
1.689e-01 |
Conversion electron |
|
2.02425e-02 |
7.232e-02 |
Conversion electron |
|
2.05455e-02 |
1.143e-01 |
Conversion electron |
|
2.35598e-02 |
9.099e-02 |
Auger electron |
|
2.42302e-02 |
7.145e-02 |
Conversion electron |
|
2.51000e-02 |
1.638e-02 |
Conversion electron |
|
2.75866e-02 |
4.074e-02 |
Auger electron |
|
3.64360e-02 |
1.845e-02 |
Conversion electron |
|
3.94360e-02 |
3.755e-02 |
Conversion electron |
|
4.40360e-02 |
6.023e-02 |
Conversion electron |
|
4.79360e-02 |
1.027e-02 |
Conversion electron |
|
5.66360e-02 |
2.643e-02 |
Conversion electron |
|
6.58360e-02 |
1.372e-02 |
Conversion electron |
|
1.44936e-01 |
1.078e-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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