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Radionuclide Dosimetric Data Sheets
Technetium-97m
Summary data
General
Classification
Isotope: Tc-97m
Atomic number (Z): 43
Mass number (A): 97
Neutron number (N): 54
Radioactive decay
Decay modes: Internal transition
Half-life: 90.1 [d]
Decay constant: 8.9040e-08 [1/s]
Daughters: Tc-97 (100.0%)
Radioactive daughters: Tc-97
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.08686 [MeV]
Mean photon energy: 0.00955 [MeV]
Air kerma rate constant, Γ10: 7.809e-18 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 7.809e-18 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 1.392e-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-:
1.392e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 1.530e-15
[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-97m 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-97m 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/Tc-97m Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
7.87601e-06 |
8.970e+00 |
X-ray |
|
2.41453e-03 |
2.180e-02 |
X-ray |
|
1.82141e-02 |
1.408e-01 |
X-ray |
|
1.83344e-02 |
2.677e-01 |
X-ray |
|
2.05668e-02 |
2.214e-02 |
X-ray |
|
2.05871e-02 |
4.309e-02 |
X-ray |
|
2.93893e-05 |
3.923e+00 |
Auger electron |
|
1.07699e-04 |
1.915e-01 |
Auger electron |
|
1.09878e-04 |
8.201e-01 |
Auger electron |
|
2.03975e-04 |
1.984e+00 |
Auger electron |
|
2.47746e-04 |
1.665e-02 |
Auger electron |
|
2.05140e-03 |
7.742e-01 |
Auger electron |
|
2.33031e-03 |
1.205e-01 |
Auger electron |
|
1.54229e-02 |
9.753e-02 |
Auger electron |
|
1.78238e-02 |
3.684e-02 |
Auger electron |
|
7.54880e-02 |
6.243e-01 |
Conversion electron |
|
9.34776e-02 |
1.330e-01 |
Conversion electron |
|
9.37021e-02 |
2.963e-02 |
Conversion electron |
|
9.38224e-02 |
1.373e-01 |
Conversion electron |
|
9.60751e-02 |
6.112e-02 |
Conversion electron |
|
9.65000e-02 |
1.064e-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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