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Radionuclide Dosimetric Data Sheets
Ruthenium-108
Summary data
General
Classification
Isotope: Ru-108
Atomic number (Z): 44
Mass number (A): 108
Neutron number (N): 64
Radioactive decay
Decay modes: β-
Half-life: 4.55 [m]
Decay constant: 2.5390e-03 [1/s]
Daughters: Rh-108 (100.0%)
Radioactive daughters: Rh-108
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.48028 [MeV]
Mean photon energy: 0.06258 [MeV]
Air kerma rate constant, Γ10: 3.067e-18 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 3.067e-18 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 7.695e-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-:
7.695e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 1.003e-14
[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/Ru-108 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-108 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-108 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
9.95728e-06 |
1.650e+00 |
X-ray |
|
2.00395e-02 |
2.030e-02 |
X-ray |
|
2.01865e-02 |
3.842e-02 |
X-ray |
|
7.36500e-02 |
1.148e-02 |
Gamma |
|
9.13300e-02 |
2.380e-02 |
Gamma |
|
1.50460e-01 |
7.840e-02 |
Gamma |
|
1.64950e-01 |
2.800e-01 |
Gamma |
|
4.28554e-01 |
4.600e-01 |
Beta |
|
4.99689e-01 |
5.400e-01 |
Beta |
|
3.34378e-05 |
6.559e-01 |
Auger electron |
|
1.11594e-04 |
7.099e-02 |
Auger electron |
|
1.15859e-04 |
1.564e-01 |
Auger electron |
|
2.60886e-04 |
3.884e-01 |
Auger electron |
|
2.27435e-03 |
1.380e-01 |
Auger electron |
|
2.61834e-03 |
2.572e-02 |
Auger electron |
|
1.12088e-02 |
6.332e-02 |
Conversion electron |
|
1.41053e-02 |
1.316e-02 |
Conversion electron |
|
1.69094e-02 |
1.169e-02 |
Auger electron |
|
5.04590e-02 |
1.820e-02 |
Conversion electron |
|
6.81390e-02 |
1.816e-02 |
Conversion electron |
|
1.27269e-01 |
1.160e-02 |
Conversion electron |
|
1.41759e-01 |
3.902e-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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