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Radionuclide Dosimetric Data Sheets
Gold-201
Summary data
General
Classification
Isotope: Au-201
Atomic number (Z): 79
Mass number (A): 201
Neutron number (N): 122
Radioactive decay
Decay modes: β-
Half-life: 26.0 [m]
Decay constant: 4.4433e-04 [1/s]
Daughters: Hg-201 (100.0%)
Radioactive daughters: None
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.42588 [MeV]
Mean photon energy: 0.03464 [MeV]
Air kerma rate constant, Γ10: 1.899e-18 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 1.899e-18 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 6.823e-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-:
6.823e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 5.550e-15
[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/Au-201 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/Au-201 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/Au-201 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.46884e-05 |
7.255e+00 |
X-ray |
|
9.98622e-03 |
1.359e-02 |
X-ray |
|
5.42600e-01 |
1.200e-02 |
Gamma |
|
2.21308e-01 |
1.523e-02 |
Beta |
|
2.24907e-01 |
1.624e-02 |
Beta |
|
3.66027e-01 |
2.639e-02 |
Beta |
|
4.19194e-01 |
5.177e-02 |
Beta |
|
4.31358e-01 |
8.729e-01 |
Beta |
|
4.23942e-05 |
2.229e+00 |
Auger electron |
|
1.09223e-04 |
1.921e+00 |
Auger electron |
|
1.86188e-04 |
1.731e+00 |
Auger electron |
|
4.23479e-04 |
6.727e-02 |
Auger electron |
|
6.68768e-04 |
5.267e-02 |
Auger electron |
|
1.58000e-03 |
9.207e-01 |
Conversion electron |
|
1.80493e-03 |
1.529e-01 |
Auger electron |
|
2.03673e-03 |
1.682e-02 |
Auger electron |
|
7.70843e-03 |
3.912e-02 |
Auger electron |
|
9.93126e-03 |
1.675e-02 |
Auger electron |
|
1.14740e-02 |
1.205e-02 |
Conversion electron |
|
1.57740e-02 |
2.556e-02 |
Conversion electron |
|
1.73640e-02 |
2.467e-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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