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Radionuclide Dosimetric Data Sheets
Gold-195m
Summary data
General
Classification
Isotope: Au-195m
Atomic number (Z): 79
Mass number (A): 195
Neutron number (N): 116
Radioactive decay
Decay modes: Internal transition
Half-life: 30.5 [s]
Decay constant: 2.2726e-02 [1/s]
Daughters: Au-195 (100.0%)
Radioactive daughters: Au-195
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.11719 [MeV]
Mean photon energy: 0.20136 [MeV]
Air kerma rate constant, Γ10: 1.579e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 1.579e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 1.878e-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-:
1.878e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 3.226e-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/Au-195m 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/Au-195m 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/Au-195m Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.11065e-05 |
1.611e+01 |
X-ray |
|
2.14952e-03 |
4.848e-02 |
X-ray |
|
9.62131e-03 |
1.430e-02 |
X-ray |
|
9.70979e-03 |
1.259e-01 |
X-ray |
|
1.14753e-02 |
1.333e-01 |
X-ray |
|
1.15870e-02 |
2.353e-02 |
X-ray |
|
1.34225e-02 |
2.631e-02 |
X-ray |
|
6.71839e-02 |
6.762e-02 |
X-ray |
|
6.90380e-02 |
1.150e-01 |
X-ray |
|
7.78158e-02 |
1.265e-02 |
X-ray |
|
7.82261e-02 |
2.449e-02 |
X-ray |
|
2.00380e-01 |
1.640e-02 |
Gamma |
|
2.61750e-01 |
6.778e-01 |
Gamma |
|
4.01448e-05 |
3.542e+00 |
Auger electron |
|
6.41789e-05 |
5.430e+00 |
Auger electron |
|
1.74940e-04 |
2.889e+00 |
Auger electron |
|
4.20641e-04 |
5.623e-01 |
Auger electron |
|
1.06570e-03 |
1.030e-01 |
Auger electron |
|
1.76116e-03 |
1.424e+00 |
Auger electron |
|
1.98531e-03 |
1.481e-01 |
Auger electron |
|
7.58138e-03 |
4.278e-01 |
Auger electron |
|
9.71504e-03 |
1.802e-01 |
Auger electron |
|
1.18779e-02 |
1.840e-02 |
Auger electron |
|
4.30240e-02 |
3.706e-01 |
Conversion electron |
|
4.48780e-02 |
3.352e-01 |
Conversion electron |
|
5.40660e-02 |
2.148e-01 |
Conversion electron |
|
5.68000e-02 |
6.444e-02 |
Conversion electron |
|
1.80790e-01 |
2.360e-01 |
Conversion electron |
|
2.47414e-01 |
3.523e-02 |
Conversion electron |
|
2.59016e-01 |
1.047e-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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