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Radionuclide Dosimetric Data Sheets
Technetium-105
Summary data
General
Classification
Isotope: Tc-105
Atomic number (Z): 43
Mass number (A): 105
Neutron number (N): 62
Radioactive decay
Decay modes: β-
Half-life: 7.6 [m]
Decay constant: 1.5201e-03 [1/s]
Daughters: Ru-105 (100.0%)
Radioactive daughters: Ru-105
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 1.27082 [MeV]
Mean photon energy: 0.79812 [MeV]
Air kerma rate constant, Γ10: 3.000e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 3.000e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 2.036e-13 [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-:
2.036e-13 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 1.279e-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/Tc-105 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/Tc-105 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/Tc-105 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/Tc-105 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
8.90642e-06 |
4.866e+00 |
X-ray |
|
2.54865e-03 |
1.167e-02 |
X-ray |
|
1.91152e-02 |
4.793e-02 |
X-ray |
|
1.92483e-02 |
9.093e-02 |
X-ray |
|
2.05500e-02 |
1.570e-02 |
Gamma |
|
2.16277e-02 |
1.484e-02 |
X-ray |
|
7.53000e-02 |
2.198e-02 |
Gamma |
|
8.25460e-02 |
4.239e-02 |
Gamma |
|
1.07945e-01 |
1.413e-01 |
Gamma |
|
1.38446e-01 |
4.239e-02 |
Gamma |
|
1.43260e-01 |
1.570e-01 |
Gamma |
|
1.57820e-01 |
2.638e-02 |
Gamma |
|
1.59528e-01 |
1.021e-01 |
Gamma |
|
2.08900e-01 |
1.319e-02 |
Gamma |
|
2.13600e-01 |
1.319e-02 |
Gamma |
|
2.25600e-01 |
2.936e-02 |
Gamma |
|
2.52000e-01 |
5.809e-02 |
Gamma |
|
2.72600e-01 |
3.454e-02 |
Gamma |
|
3.03200e-01 |
1.209e-02 |
Gamma |
|
3.04500e-01 |
1.052e-02 |
Gamma |
|
3.05500e-01 |
1.099e-02 |
Gamma |
|
3.07000e-01 |
1.021e-02 |
Gamma |
|
3.21500e-01 |
1.115e-01 |
Gamma |
|
3.22300e-01 |
1.570e-02 |
Gamma |
|
3.58300e-01 |
2.512e-02 |
Gamma |
|
4.41900e-01 |
1.758e-02 |
Gamma |
|
4.45900e-01 |
1.617e-02 |
Gamma |
|
4.62800e-01 |
4.396e-02 |
Gamma |
|
4.66300e-01 |
1.491e-02 |
Gamma |
|
4.80100e-01 |
1.491e-02 |
Gamma |
|
4.90600e-01 |
2.355e-02 |
Gamma |
|
5.65100e-01 |
1.319e-02 |
Gamma |
|
5.77900e-01 |
2.355e-02 |
Gamma |
|
6.04600e-01 |
1.099e-02 |
Gamma |
|
6.08500e-01 |
2.355e-02 |
Gamma |
|
6.40200e-01 |
2.638e-02 |
Gamma |
|
6.46300e-01 |
1.178e-02 |
Gamma |
|
6.98000e-01 |
1.570e-02 |
Gamma |
|
7.39300e-01 |
1.617e-02 |
Gamma |
|
7.57000e-01 |
1.178e-02 |
Gamma |
|
8.24300e-01 |
1.178e-02 |
Gamma |
|
8.96000e-01 |
1.570e-02 |
Gamma |
|
9.14500e-01 |
3.768e-02 |
Gamma |
|
1.00840e+00 |
1.758e-02 |
Gamma |
|
1.20160e+00 |
1.178e-02 |
Gamma |
|
1.36630e+00 |
3.234e-02 |
Gamma |
|
1.51060e+00 |
2.355e-02 |
Gamma |
|
1.56010e+00 |
2.041e-02 |
Gamma |
|
2.05390e+00 |
1.491e-02 |
Gamma |
|
2.08200e+00 |
1.491e-02 |
Gamma |
|
2.15540e+00 |
2.198e-02 |
Gamma |
|
4.51429e-01 |
1.809e-02 |
Beta |
|
4.84724e-01 |
1.713e-02 |
Beta |
|
5.59704e-01 |
2.951e-02 |
Beta |
|
6.99423e-01 |
1.142e-02 |
Beta |
|
7.04192e-01 |
1.076e-01 |
Beta |
|
9.36674e-01 |
1.333e-02 |
Beta |
|
1.13346e+00 |
1.685e-02 |
Beta |
|
1.14124e+00 |
3.808e-02 |
Beta |
|
1.17046e+00 |
1.999e-02 |
Beta |
|
1.17918e+00 |
1.123e-02 |
Beta |
|
1.18702e+00 |
2.189e-02 |
Beta |
|
1.20215e+00 |
2.951e-02 |
Beta |
|
1.25524e+00 |
3.998e-02 |
Beta |
|
1.28425e+00 |
1.047e-02 |
Beta |
|
1.28633e+00 |
3.046e-02 |
Beta |
|
1.32751e+00 |
2.380e-02 |
Beta |
|
1.33897e+00 |
3.332e-02 |
Beta |
|
1.35052e+00 |
2.475e-02 |
Beta |
|
1.40742e+00 |
8.567e-02 |
Beta |
|
1.43060e+00 |
4.569e-02 |
Beta |
|
1.44308e+00 |
1.142e-01 |
Beta |
|
1.48219e+00 |
7.615e-02 |
Beta |
|
1.48431e+00 |
4.855e-02 |
Beta |
|
1.50864e+00 |
3.808e-02 |
Beta |
|
1.55989e+00 |
8.567e-02 |
Beta |
|
3.13597e-05 |
2.029e+00 |
Auger electron |
|
1.11061e-04 |
2.311e-01 |
Auger electron |
|
1.11197e-04 |
4.425e-01 |
Auger electron |
|
2.32522e-04 |
1.114e+00 |
Auger electron |
|
2.16750e-03 |
3.884e-01 |
Auger electron |
|
2.48090e-03 |
6.670e-02 |
Auger electron |
|
1.61570e-02 |
3.023e-02 |
Auger electron |
|
1.73461e-02 |
2.217e-01 |
Conversion electron |
|
1.75782e-02 |
1.740e-02 |
Conversion electron |
|
1.86981e-02 |
1.163e-02 |
Auger electron |
|
2.00907e-02 |
4.532e-02 |
Conversion electron |
|
3.36530e-02 |
4.585e-02 |
Conversion electron |
|
5.32130e-02 |
1.344e-02 |
Conversion electron |
|
8.58580e-02 |
7.384e-02 |
Conversion electron |
|
1.21173e-01 |
3.284e-02 |
Conversion electron |
|
1.37441e-01 |
1.513e-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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