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Radionuclide Dosimetric Data Sheets
Mercury-203
Summary data
General
Classification
Isotope: Hg-203
Atomic number (Z): 80
Mass number (A): 203
Neutron number (N): 123
Radioactive decay
Decay modes: β-
Half-life: 46.61 [d]
Decay constant: 1.7211e-07 [1/s]
Daughters: Tl-203 (100.0%)
Radioactive daughters: None
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.09895 [MeV]
Mean photon energy: 0.23804 [MeV]
Air kerma rate constant, Γ10: 1.112e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 1.112e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 1.585e-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-:
1.585e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 3.814e-14
[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-203 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-203 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-203 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-203 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
2.07395e-05 |
2.318e+00 |
X-ray |
|
1.02661e-02 |
2.293e-02 |
X-ray |
|
1.22523e-02 |
1.647e-02 |
X-ray |
|
7.10519e-02 |
3.887e-02 |
X-ray |
|
7.31380e-02 |
6.558e-02 |
X-ray |
|
8.28534e-02 |
1.408e-02 |
X-ray |
|
2.79197e-01 |
8.146e-01 |
Gamma |
|
5.77970e-02 |
1.000e+00 |
Beta |
|
4.30246e-05 |
5.087e-01 |
Auger electron |
|
7.57380e-05 |
7.596e-01 |
Auger electron |
|
1.74596e-04 |
3.985e-01 |
Auger electron |
|
4.18654e-04 |
8.657e-02 |
Auger electron |
|
9.42819e-04 |
2.461e-02 |
Auger electron |
|
1.86013e-03 |
2.096e-01 |
Auger electron |
|
2.10606e-03 |
2.469e-02 |
Auger electron |
|
7.87164e-03 |
6.280e-02 |
Auger electron |
|
1.01638e-02 |
2.733e-02 |
Auger electron |
|
1.93399e-01 |
1.381e-01 |
Conversion electron |
|
2.63867e-01 |
2.074e-02 |
Conversion electron |
|
2.64451e-01 |
1.036e-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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