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Radionuclide Dosimetric Data Sheets
Mercury-193m
Summary data
General
Classification
Isotope: Hg-193m
Atomic number (Z): 80
Mass number (A): 193
Neutron number (N): 113
Radioactive decay
Decay modes: β+, Electron capture, Internal
transition
Half-life: 11.8 [h]
Decay constant: 1.6317e-05 [1/s]
Daughters: Au-193m (89.2%), Hg-193 (7.1%), Au-193 (3.7%)
Radioactive daughters: Au-193m, Hg-193, Au-193
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.04695 [MeV]
Mean photon energy: 1.02393 [MeV]
Air kerma rate constant, Γ10: 4.231e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 4.252e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 7.522e-15 [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-:
7.522e-15 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 1.641e-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/Hg-193m 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/Hg-193m 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/Hg-193m 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/Hg-193m Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.10995e-05 |
1.342e+01 |
X-ray |
|
1.46950e-05 |
1.948e+00 |
X-ray |
|
2.14493e-03 |
4.084e-02 |
X-ray |
|
9.62130e-03 |
1.383e-02 |
X-ray |
|
9.70979e-03 |
1.218e-01 |
X-ray |
|
9.98623e-03 |
1.822e-02 |
X-ray |
|
1.14753e-02 |
7.548e-02 |
X-ray |
|
1.15870e-02 |
2.275e-02 |
X-ray |
|
1.34225e-02 |
1.490e-02 |
X-ray |
|
6.71839e-02 |
2.193e-01 |
X-ray |
|
6.90380e-02 |
3.731e-01 |
X-ray |
|
7.78158e-02 |
4.104e-02 |
X-ray |
|
7.82261e-02 |
7.941e-02 |
X-ray |
|
8.04227e-02 |
1.880e-02 |
X-ray |
|
2.18070e-01 |
5.312e-02 |
Gamma |
|
2.90750e-01 |
1.561e-02 |
Gamma |
|
3.41910e-01 |
2.165e-02 |
Gamma |
|
3.64470e-01 |
1.662e-02 |
Gamma |
|
3.82470e-01 |
4.330e-02 |
Gamma |
|
3.94000e-01 |
3.122e-02 |
Gamma |
|
4.07630e-01 |
2.518e-01 |
Gamma |
|
4.61830e-01 |
1.108e-02 |
Gamma |
|
4.99650e-01 |
2.543e-02 |
Gamma |
|
5.11000e-01 |
1.059e-02 |
Annihilation photon |
|
5.35150e-01 |
2.039e-02 |
Gamma |
|
5.37080e-01 |
1.989e-02 |
Gamma |
|
5.39030e-01 |
1.007e-02 |
Gamma |
|
5.50630e-01 |
1.007e-02 |
Gamma |
|
5.73250e-01 |
1.417e-01 |
Gamma |
|
6.00650e-01 |
2.140e-02 |
Gamma |
|
7.76570e-01 |
1.083e-02 |
Gamma |
|
8.70050e-01 |
1.460e-02 |
Gamma |
|
8.77760e-01 |
2.694e-02 |
Gamma |
|
9.13060e-01 |
1.083e-02 |
Gamma |
|
9.32370e-01 |
6.697e-02 |
Gamma |
|
9.94610e-01 |
1.586e-02 |
Gamma |
|
1.10980e+00 |
1.813e-02 |
Gamma |
|
1.17400e+00 |
1.989e-02 |
Gamma |
|
1.24130e+00 |
2.165e-02 |
Gamma |
|
1.32550e+00 |
2.140e-02 |
Gamma |
|
1.33960e+00 |
1.511e-02 |
Gamma |
|
1.36510e+00 |
1.435e-02 |
Gamma |
|
1.40660e+00 |
1.032e-02 |
Gamma |
|
1.48610e+00 |
1.485e-02 |
Gamma |
|
1.63940e+00 |
1.561e-02 |
Gamma |
|
1.64850e+00 |
1.259e-02 |
Gamma |
|
4.01452e-05 |
2.949e+00 |
Auger electron |
|
4.20302e-05 |
4.434e-01 |
Auger electron |
|
6.40895e-05 |
4.526e+00 |
Auger electron |
|
7.01381e-05 |
6.440e-01 |
Auger electron |
|
1.74283e-04 |
3.373e-01 |
Auger electron |
|
1.74380e-04 |
2.389e+00 |
Auger electron |
|
4.13057e-04 |
4.584e-01 |
Auger electron |
|
4.13570e-04 |
7.561e-02 |
Auger electron |
|
6.60007e-04 |
4.630e-02 |
Auger electron |
|
7.56143e-04 |
1.626e-01 |
Auger electron |
|
1.75361e-03 |
1.200e+00 |
Auger electron |
|
1.80259e-03 |
1.736e-01 |
Auger electron |
|
1.97360e-03 |
1.241e-01 |
Auger electron |
|
2.03416e-03 |
1.914e-02 |
Auger electron |
|
7.45029e-03 |
3.612e-01 |
Auger electron |
|
7.52683e-03 |
4.565e-02 |
Auger electron |
|
9.57861e-03 |
1.518e-01 |
Auger electron |
|
9.73410e-03 |
1.948e-02 |
Auger electron |
|
1.17351e-02 |
1.547e-02 |
Auger electron |
|
2.46840e-02 |
4.796e-02 |
Conversion electron |
|
3.66731e-02 |
1.242e-02 |
Conversion electron |
|
5.42437e-02 |
1.996e-02 |
Auger electron |
|
6.50992e-02 |
1.075e-02 |
Auger electron |
|
8.64240e-02 |
1.045e-02 |
Conversion electron |
|
8.89630e-02 |
3.519e-02 |
Conversion electron |
|
9.84131e-02 |
1.641e-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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