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Radionuclide Dosimetric Data Sheets
Tellurium-117
Summary data
General
Classification
Isotope: Te-117
Atomic number (Z): 52
Mass number (A): 117
Neutron number (N): 65
Radioactive decay
Decay modes: β+, Electron capture
Half-life: 62.0 [m]
Decay constant: 1.8633e-04 [1/s]
Daughters: Sb-117 (100.0%)
Radioactive daughters: Sb-117
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.21387 [MeV]
Mean photon energy: 1.54921 [MeV]
Air kerma rate constant, Γ10: 4.655e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 5.692e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 3.427e-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-:
3.427e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 2.482e-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/Te-117 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/Te-117 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/Te-117 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/Te-117 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.22327e-05 |
9.737e+00 |
X-ray |
|
3.59266e-03 |
2.354e-02 |
X-ray |
|
3.83820e-03 |
1.345e-02 |
X-ray |
|
2.60930e-02 |
1.576e-01 |
X-ray |
|
2.63486e-02 |
2.942e-01 |
X-ray |
|
2.96698e-02 |
2.682e-02 |
X-ray |
|
2.97173e-02 |
5.204e-02 |
X-ray |
|
3.03709e-02 |
1.082e-02 |
X-ray |
|
5.11000e-01 |
5.360e-01 |
Annihilation photon |
|
7.19700e-01 |
6.470e-01 |
Gamma |
|
8.86700e-01 |
1.488e-02 |
Gamma |
|
9.23900e-01 |
6.211e-02 |
Gamma |
|
9.96700e-01 |
3.947e-02 |
Gamma |
|
1.09070e+00 |
6.858e-02 |
Gamma |
|
1.71640e+00 |
1.585e-01 |
Gamma |
|
2.30000e+00 |
1.119e-01 |
Gamma |
|
3.59314e-01 |
1.009e-02 |
Positron |
|
7.10728e-01 |
1.598e-02 |
Positron |
|
8.02941e-01 |
2.377e-01 |
Positron |
|
1.68962e-05 |
4.793e+00 |
Auger electron |
|
2.73576e-05 |
1.618e+00 |
Auger electron |
|
1.21998e-04 |
5.420e-01 |
Auger electron |
|
2.83627e-04 |
9.844e-02 |
Auger electron |
|
4.22556e-04 |
1.213e+00 |
Auger electron |
|
5.04974e-04 |
3.674e-02 |
Auger electron |
|
2.96529e-03 |
4.776e-01 |
Auger electron |
|
3.52013e-03 |
1.293e-01 |
Auger electron |
|
2.17904e-02 |
5.497e-02 |
Auger electron |
|
2.54497e-02 |
2.381e-02 |
Auger 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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