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Radionuclide Dosimetric Data Sheets
Silver-111m
Summary data
General
Classification
Isotope: Ag-111m
Atomic number (Z): 47
Mass number (A): 111
Neutron number (N): 64
Radioactive decay
Decay modes: β-, Internal transition
Half-life: 64.8 [s]
Decay constant: 1.0697e-02 [1/s]
Daughters: Ag-111 (99.3%), Cd-111 (0.7%)
Radioactive daughters: Ag-111
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.05677 [MeV]
Mean photon energy: 0.00786 [MeV]
Air kerma rate constant, Γ10: 2.108e-18 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 2.108e-18 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 9.096e-15 [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-:
9.096e-15 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 1.259e-15
[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/Ag-111m 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/Ag-111m 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/Ag-111m 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/Ag-111m Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.20811e-05 |
6.651e+00 |
X-ray |
|
2.97344e-03 |
2.284e-02 |
X-ray |
|
3.14510e-03 |
1.577e-02 |
X-ray |
|
2.19609e-02 |
5.334e-02 |
X-ray |
|
2.21389e-02 |
1.005e-01 |
X-ray |
|
2.49204e-02 |
1.703e-02 |
X-ray |
|
3.79190e-05 |
2.414e+00 |
Auger electron |
|
1.29117e-04 |
6.866e-01 |
Auger electron |
|
1.34135e-04 |
7.802e-02 |
Auger electron |
|
3.18815e-04 |
1.641e+00 |
Auger electron |
|
2.49622e-03 |
6.415e-01 |
Auger electron |
|
2.90301e-03 |
1.389e-01 |
Auger electron |
|
1.84718e-02 |
2.578e-02 |
Auger electron |
|
2.14605e-02 |
1.042e-02 |
Auger electron |
|
3.42810e-02 |
2.223e-01 |
Conversion electron |
|
5.59866e-02 |
1.526e-02 |
Conversion electron |
|
5.62419e-02 |
2.662e-01 |
Conversion electron |
|
5.64200e-02 |
3.413e-01 |
Conversion electron |
|
5.92015e-02 |
1.302e-01 |
Conversion electron |
|
5.97700e-02 |
2.235e-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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