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Radionuclide Dosimetric Data Sheets
Xenon-127
Summary data
General
Classification
Isotope: Xe-127
Atomic number (Z): 54
Mass number (A): 127
Neutron number (N): 73
Radioactive decay
Decay modes: Electron capture
Half-life: 36.4 [d]
Decay constant: 2.2040e-07 [1/s]
Daughters: I-127 (100.0%)
Radioactive daughters: None
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.03251 [MeV]
Mean photon energy: 0.28063 [MeV]
Air kerma rate constant, Γ10: 1.437e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 1.437e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 5.209e-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-:
5.209e-15 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 4.496e-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-127 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-127 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-127 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.52652e-05 |
1.471e+01 |
X-ray |
|
3.92520e-03 |
4.243e-02 |
X-ray |
|
4.21605e-03 |
2.465e-02 |
X-ray |
|
2.83065e-02 |
2.542e-01 |
X-ray |
|
2.86096e-02 |
4.719e-01 |
X-ray |
|
3.22368e-02 |
4.389e-02 |
X-ray |
|
3.22942e-02 |
8.511e-02 |
X-ray |
|
3.30298e-02 |
1.790e-02 |
X-ray |
|
5.76100e-02 |
1.321e-02 |
Gamma |
|
1.45252e-01 |
4.289e-02 |
Gamma |
|
1.72132e-01 |
2.554e-01 |
Gamma |
|
2.02860e-01 |
6.830e-01 |
Gamma |
|
3.74991e-01 |
1.721e-01 |
Gamma |
|
2.70523e-05 |
2.210e+00 |
Auger electron |
|
2.89571e-05 |
7.087e+00 |
Auger electron |
|
1.25031e-04 |
8.163e-01 |
Auger electron |
|
3.10962e-04 |
1.649e-01 |
Auger electron |
|
4.77172e-04 |
1.880e+00 |
Auger electron |
|
5.79056e-04 |
8.955e-02 |
Auger electron |
|
3.20798e-03 |
7.369e-01 |
Auger electron |
|
3.84313e-03 |
2.178e-01 |
Auger electron |
|
4.50220e-03 |
1.587e-02 |
Auger electron |
|
2.35598e-02 |
7.632e-02 |
Auger electron |
|
2.44460e-02 |
4.267e-02 |
Conversion electron |
|
2.75866e-02 |
3.417e-02 |
Auger electron |
|
1.12088e-01 |
1.531e-02 |
Conversion electron |
|
1.38968e-01 |
3.682e-02 |
Conversion electron |
|
1.69696e-01 |
6.684e-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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