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Radionuclide Dosimetric Data Sheets
Mercury-195
Summary data
General
Classification
Isotope: Hg-195
Atomic number (Z): 80
Mass number (A): 195
Neutron number (N): 115
Radioactive decay
Decay modes: β+, Electron capture
Half-life: 10.53 [h]
Decay constant: 1.8285e-05 [1/s]
Daughters: Au-195 (100.0%)
Radioactive daughters: Au-195
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.06503 [MeV]
Mean photon energy: 0.2008 [MeV]
Air kerma rate constant, Γ10: 1.820e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 1.822e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 1.042e-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-:
1.042e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 3.217e-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-195 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-195 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-195 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-195 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.11018e-05 |
2.470e+01 |
X-ray |
|
2.14623e-03 |
7.479e-02 |
X-ray |
|
8.52062e-03 |
1.357e-02 |
X-ray |
|
9.62129e-03 |
2.361e-02 |
X-ray |
|
9.70979e-03 |
2.080e-01 |
X-ray |
|
1.11917e-02 |
1.023e-02 |
X-ray |
|
1.14753e-02 |
1.441e-01 |
X-ray |
|
1.15870e-02 |
3.885e-02 |
X-ray |
|
1.16020e-02 |
1.181e-02 |
X-ray |
|
1.34225e-02 |
2.846e-02 |
X-ray |
|
6.14600e-02 |
6.188e-02 |
Gamma |
|
6.71839e-02 |
2.330e-01 |
X-ray |
|
6.90380e-02 |
3.964e-01 |
X-ray |
|
7.78158e-02 |
4.361e-02 |
X-ray |
|
7.82261e-02 |
8.437e-02 |
X-ray |
|
8.03237e-02 |
1.022e-02 |
X-ray |
|
8.04227e-02 |
1.998e-02 |
X-ray |
|
1.80110e-01 |
1.897e-02 |
Gamma |
|
2.07100e-01 |
1.571e-02 |
Gamma |
|
2.61750e-01 |
1.513e-02 |
Gamma |
|
5.85130e-01 |
1.986e-02 |
Gamma |
|
5.99660e-01 |
1.782e-02 |
Gamma |
|
7.79800e-01 |
6.800e-02 |
Gamma |
|
1.11104e+00 |
1.442e-02 |
Gamma |
|
1.17238e+00 |
1.244e-02 |
Gamma |
|
4.01481e-05 |
5.435e+00 |
Auger electron |
|
6.42254e-05 |
8.325e+00 |
Auger electron |
|
1.74566e-04 |
4.400e+00 |
Auger electron |
|
4.16365e-04 |
8.598e-01 |
Auger electron |
|
7.36002e-04 |
3.515e-01 |
Auger electron |
|
1.75519e-03 |
2.196e+00 |
Auger electron |
|
1.97612e-03 |
2.272e-01 |
Auger electron |
|
2.31429e-03 |
1.117e-02 |
Auger electron |
|
7.49962e-03 |
6.436e-01 |
Auger electron |
|
9.63204e-03 |
2.707e-01 |
Auger electron |
|
1.17951e-02 |
2.762e-02 |
Auger electron |
|
4.71240e-02 |
2.059e-01 |
Conversion electron |
|
4.76840e-02 |
2.041e-01 |
Conversion electron |
|
4.95380e-02 |
1.812e-01 |
Conversion electron |
|
5.42437e-02 |
2.121e-02 |
Auger electron |
|
5.87260e-02 |
1.478e-01 |
Conversion electron |
|
6.14600e-02 |
4.428e-02 |
Conversion electron |
|
6.50992e-02 |
1.142e-02 |
Auger electron |
|
9.91500e-02 |
2.189e-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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