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Radionuclide Dosimetric Data Sheets
Silver-104m
Summary data
General
Classification
Isotope: Ag-104m
Atomic number (Z): 47
Mass number (A): 104
Neutron number (N): 57
Radioactive decay
Decay modes: β+, Electron capture, Internal
transition
Half-life: 33.5 [m]
Decay constant: 3.4485e-04 [1/s]
Daughters: Ag-104 (0.07%), Pd-104 (99.9%)
Radioactive daughters: Ag-104
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.73307 [MeV]
Mean photon energy: 1.80467 [MeV]
Air kerma rate constant, Γ10: 4.194e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 6.597e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 1.175e-13 [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-:
1.175e-13 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 2.891e-13
[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-104m 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-104m 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-104m 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-104m Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
7.85942e-06 |
3.072e+00 |
X-ray |
|
2.82809e-03 |
1.015e-02 |
X-ray |
|
2.09884e-02 |
7.826e-02 |
X-ray |
|
2.11504e-02 |
1.478e-01 |
X-ray |
|
2.37657e-02 |
1.273e-02 |
X-ray |
|
2.37942e-02 |
2.475e-02 |
X-ray |
|
5.11000e-01 |
1.241e+00 |
Annihilation photon |
|
5.55800e-01 |
8.994e-01 |
Gamma |
|
7.85700e-01 |
1.889e-02 |
Gamma |
|
1.23880e+00 |
3.867e-02 |
Gamma |
|
1.34180e+00 |
1.619e-02 |
Gamma |
|
1.72080e+00 |
1.709e-02 |
Gamma |
|
1.78180e+00 |
2.069e-02 |
Gamma |
|
2.13920e+00 |
1.574e-02 |
Gamma |
|
2.27670e+00 |
2.428e-02 |
Gamma |
|
2.72950e+00 |
1.169e-02 |
Gamma |
|
3.21360e+00 |
1.439e-02 |
Gamma |
|
3.40780e+00 |
1.439e-02 |
Gamma |
|
6.53400e-01 |
1.775e-02 |
Positron |
|
8.58451e-01 |
1.085e-02 |
Positron |
|
1.22131e+00 |
5.721e-01 |
Positron |
|
3.81977e-05 |
1.157e+00 |
Auger electron |
|
1.21679e-04 |
7.030e-02 |
Auger electron |
|
1.25991e-04 |
3.042e-01 |
Auger electron |
|
2.92901e-04 |
7.507e-01 |
Auger electron |
|
2.38228e-03 |
2.858e-01 |
Auger electron |
|
2.75695e-03 |
5.797e-02 |
Auger electron |
|
1.76856e-02 |
4.128e-02 |
Auger electron |
|
2.05196e-02 |
1.638e-02 |
Auger 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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