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Radionuclide Dosimetric Data Sheets
Mercury-197
Summary data
General
Classification
Isotope: Hg-197
Atomic number (Z): 80
Mass number (A): 197
Neutron number (N): 117
Radioactive decay
Decay modes: Electron capture
Half-life: 64.94 [h]
Decay constant: 2.9649e-06 [1/s]
Daughters: Au-197 (100.0%)
Radioactive daughters: None
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.07024 [MeV]
Mean photon energy: 0.07398 [MeV]
Air kerma rate constant, Γ10: 1.303e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 1.303e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 1.125e-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-:
1.125e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 1.185e-14
[Gy·kg/Bq·s]
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-197 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/Hg-197 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.11015e-05 |
2.506e+01 |
X-ray |
|
2.14585e-03 |
7.579e-02 |
X-ray |
|
8.52062e-03 |
1.346e-02 |
X-ray |
|
9.62128e-03 |
2.342e-02 |
X-ray |
|
9.70979e-03 |
2.063e-01 |
X-ray |
|
1.11917e-02 |
1.424e-02 |
X-ray |
|
1.14753e-02 |
1.258e-01 |
X-ray |
|
1.15870e-02 |
3.854e-02 |
X-ray |
|
1.16020e-02 |
1.643e-02 |
X-ray |
|
1.34225e-02 |
2.482e-02 |
X-ray |
|
6.71839e-02 |
2.173e-01 |
X-ray |
|
6.90380e-02 |
3.698e-01 |
X-ray |
|
7.73510e-02 |
1.870e-01 |
Gamma |
|
7.78158e-02 |
4.068e-02 |
X-ray |
|
7.82261e-02 |
7.870e-02 |
X-ray |
|
8.04227e-02 |
1.864e-02 |
X-ray |
|
4.01512e-05 |
5.522e+00 |
Auger electron |
|
6.43330e-05 |
8.444e+00 |
Auger electron |
|
1.74549e-04 |
4.456e+00 |
Auger electron |
|
4.16882e-04 |
8.824e-01 |
Auger electron |
|
6.85941e-04 |
4.559e-01 |
Auger electron |
|
1.75404e-03 |
2.224e+00 |
Auger electron |
|
1.97445e-03 |
2.297e-01 |
Auger electron |
|
2.31252e-03 |
1.128e-02 |
Auger electron |
|
7.49661e-03 |
6.326e-01 |
Auger electron |
|
9.63086e-03 |
2.662e-01 |
Auger electron |
|
1.17977e-02 |
2.717e-02 |
Auger electron |
|
5.42437e-02 |
1.978e-02 |
Auger electron |
|
6.30150e-02 |
3.375e-01 |
Conversion electron |
|
6.35750e-02 |
1.550e-01 |
Conversion electron |
|
6.50992e-02 |
1.065e-02 |
Auger electron |
|
6.54290e-02 |
1.151e-01 |
Conversion electron |
|
7.46170e-02 |
1.482e-01 |
Conversion electron |
|
7.73510e-02 |
4.502e-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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