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Radionuclide Dosimetric Data Sheets
Technetium-92
Summary data
General
Classification
Isotope: Tc-92
Atomic number (Z): 43
Mass number (A): 92
Neutron number (N): 49
Radioactive decay
Decay modes: β+, Electron capture
Half-life: 4.25 [m]
Decay constant: 2.7182e-03 [1/s]
Daughters: Mo-92 (100.0%)
Radioactive daughters: None
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 1.79844 [MeV]
Mean photon energy: 3.82781 [MeV]
Air kerma rate constant, Γ10: 1.001e-16 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 1.370e-16 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 2.881e-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-:
2.881e-13 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 6.133e-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-92 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-92 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-92 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-92 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
6.84807e-06 |
2.972e+00 |
X-ray |
|
1.73355e-02 |
5.589e-02 |
X-ray |
|
1.74440e-02 |
1.065e-01 |
X-ray |
|
1.95734e-02 |
1.689e-02 |
X-ray |
|
8.50000e-02 |
1.210e-01 |
Gamma |
|
1.48000e-01 |
7.100e-01 |
Gamma |
|
2.43700e-01 |
1.330e-01 |
Gamma |
|
3.29300e-01 |
7.990e-01 |
Gamma |
|
5.11000e-01 |
1.904e+00 |
Annihilation photon |
|
7.73000e-01 |
1.000e+00 |
Gamma |
|
1.50960e+00 |
1.010e+00 |
Gamma |
|
2.15700e+00 |
1.200e-02 |
Gamma |
|
8.59606e-01 |
1.635e-02 |
Positron |
|
1.87328e+00 |
9.314e-01 |
Positron |
|
2.73659e-05 |
1.376e+00 |
Auger electron |
|
1.05667e-04 |
5.376e-02 |
Auger electron |
|
1.06940e-04 |
2.622e-01 |
Auger electron |
|
1.76189e-04 |
6.274e-01 |
Auger electron |
|
1.95188e-03 |
2.517e-01 |
Auger electron |
|
2.20093e-03 |
3.563e-02 |
Auger electron |
|
1.47064e-02 |
4.260e-02 |
Auger electron |
|
1.69714e-02 |
1.578e-02 |
Auger electron |
|
6.50350e-02 |
2.150e-02 |
Conversion electron |
|
1.28035e-01 |
1.742e-01 |
Conversion electron |
|
1.45154e-01 |
1.680e-02 |
Conversion electron |
|
3.09335e-01 |
1.228e-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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