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Radionuclide Dosimetric Data Sheets
Technetium-102m
Summary data
General
Classification
Isotope: Tc-102m
Atomic number (Z): 43
Mass number (A): 102
Neutron number (N): 59
Radioactive decay
Decay modes: β-, Internal transition
Half-life: 4.35 [m]
Decay constant: 2.6557e-03 [1/s]
Daughters: Tc-102 (2.0%), Ru-102 (98.0%)
Radioactive daughters: Tc-102
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.7902 [MeV]
Mean photon energy: 2.47442 [MeV]
Air kerma rate constant, Γ10: 8.328e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 8.328e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 1.266e-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-:
1.266e-13 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 3.964e-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-102m 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-102m 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-102m 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-102m Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
7.87358e-06 |
1.582e-01 |
X-ray |
|
8.90939e-06 |
6.998e-02 |
X-ray |
|
4.18400e-01 |
4.604e-02 |
Gamma |
|
4.75200e-01 |
8.526e-01 |
Gamma |
|
4.97200e-01 |
5.968e-02 |
Gamma |
|
6.28100e-01 |
2.617e-01 |
Gamma |
|
6.30200e-01 |
1.577e-01 |
Gamma |
|
6.91800e-01 |
2.302e-02 |
Gamma |
|
6.95600e-01 |
2.558e-02 |
Gamma |
|
6.96900e-01 |
6.224e-02 |
Gamma |
|
1.04640e+00 |
1.262e-01 |
Gamma |
|
1.07470e+00 |
1.279e-02 |
Gamma |
|
1.10330e+00 |
1.236e-01 |
Gamma |
|
1.11310e+00 |
2.251e-02 |
Gamma |
|
1.12750e+00 |
1.168e-02 |
Gamma |
|
1.19760e+00 |
7.503e-02 |
Gamma |
|
1.29250e+00 |
4.263e-02 |
Gamma |
|
1.33860e+00 |
4.092e-02 |
Gamma |
|
1.59620e+00 |
2.771e-02 |
Gamma |
|
1.61530e+00 |
1.543e-01 |
Gamma |
|
1.71120e+00 |
2.814e-02 |
Gamma |
|
1.81070e+00 |
5.798e-02 |
Gamma |
|
1.90730e+00 |
1.637e-02 |
Gamma |
|
1.94580e+00 |
1.535e-02 |
Gamma |
|
1.96700e+00 |
1.449e-02 |
Gamma |
|
2.13920e+00 |
1.782e-02 |
Gamma |
|
2.22570e+00 |
5.712e-02 |
Gamma |
|
2.24470e+00 |
1.185e-01 |
Gamma |
|
2.43840e+00 |
4.604e-02 |
Gamma |
|
5.82401e-01 |
2.798e-02 |
Beta |
|
6.25357e-01 |
1.036e-01 |
Beta |
|
6.70019e-01 |
7.568e-02 |
Beta |
|
7.13027e-01 |
3.465e-01 |
Beta |
|
7.21141e-01 |
9.061e-02 |
Beta |
|
7.60605e-01 |
2.688e-02 |
Beta |
|
8.39593e-01 |
6.373e-02 |
Beta |
|
8.49107e-01 |
2.440e-02 |
Beta |
|
9.42550e-01 |
8.464e-02 |
Beta |
|
1.13865e+00 |
4.839e-02 |
Beta |
|
1.23043e+00 |
7.070e-02 |
Beta |
|
1.46527e+00 |
1.693e-02 |
Beta |
|
2.93426e-05 |
6.939e-02 |
Auger electron |
|
3.14582e-05 |
2.901e-02 |
Auger electron |
|
1.08024e-04 |
1.464e-02 |
Auger electron |
|
2.04214e-04 |
3.498e-02 |
Auger electron |
|
2.31863e-04 |
1.608e-02 |
Auger electron |
|
2.03463e-03 |
1.317e-02 |
Auger electron |
|
1.73224e-02 |
1.131e-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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