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Radionuclide Dosimetric Data Sheets
Ruthenium-94
Summary data
General
Classification
Isotope: Ru-94
Atomic number (Z): 44
Mass number (A): 94
Neutron number (N): 50
Radioactive decay
Decay modes: β+, Electron capture
Half-life: 51.8 [m]
Decay constant: 2.2302e-04 [1/s]
Daughters: Tc-94m (100.0%)
Radioactive daughters: Tc-94m
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.00846 [MeV]
Mean photon energy: 0.51969 [MeV]
Air kerma rate constant, Γ10: 2.963e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 2.963e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 1.355e-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-:
1.355e-15 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 8.326e-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/Ru-94 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/Ru-94 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/Ru-94 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/Ru-94 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
7.87644e-06 |
9.492e+00 |
X-ray |
|
2.41453e-03 |
2.242e-02 |
X-ray |
|
2.53088e-03 |
1.041e-02 |
X-ray |
|
1.82141e-02 |
1.967e-01 |
X-ray |
|
1.83344e-02 |
3.740e-01 |
X-ray |
|
2.05668e-02 |
3.093e-02 |
X-ray |
|
2.05871e-02 |
6.020e-02 |
X-ray |
|
2.09655e-02 |
1.147e-02 |
X-ray |
|
3.67200e-01 |
7.520e-01 |
Gamma |
|
5.25000e-01 |
1.805e-02 |
Gamma |
|
8.91200e-01 |
2.482e-01 |
Gamma |
|
2.93992e-05 |
4.149e+00 |
Auger electron |
|
1.06667e-04 |
1.974e-01 |
Auger electron |
|
1.10209e-04 |
8.659e-01 |
Auger electron |
|
2.03926e-04 |
2.100e+00 |
Auger electron |
|
2.47567e-04 |
1.762e-02 |
Auger electron |
|
2.05400e-03 |
8.271e-01 |
Auger electron |
|
2.33288e-03 |
1.288e-01 |
Auger electron |
|
1.54229e-02 |
1.363e-01 |
Auger electron |
|
1.78238e-02 |
5.147e-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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