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Radionuclide Dosimetric Data Sheets
Europium-159
Summary data
General
Classification
Isotope: Eu-159
Atomic number (Z): 63
Mass number (A): 159
Neutron number (N): 96
Radioactive decay
Decay modes: β-
Half-life: 18.1 [m]
Decay constant: 6.3826e-04 [1/s]
Daughters: Gd-159 (100.0%)
Radioactive daughters: Gd-159
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.89226 [MeV]
Mean photon energy: 0.30317 [MeV]
Air kerma rate constant, Γ10: 1.241e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 1.241e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 1.430e-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-:
1.430e-13 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 4.857e-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/Eu-159 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/Eu-159 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/Eu-159 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/Eu-159 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.94281e-05 |
1.122e+01 |
X-ray |
|
1.09457e-03 |
1.713e-02 |
X-ray |
|
6.04290e-03 |
7.871e-02 |
X-ray |
|
6.71540e-03 |
5.151e-02 |
X-ray |
|
7.08640e-03 |
1.338e-02 |
X-ray |
|
1.71000e-02 |
1.593e-02 |
Gamma |
|
4.23559e-02 |
2.583e-01 |
X-ray |
|
4.30603e-02 |
4.645e-01 |
X-ray |
|
4.86161e-02 |
4.720e-02 |
X-ray |
|
4.87612e-02 |
9.129e-02 |
X-ray |
|
4.99916e-02 |
1.037e-02 |
X-ray |
|
5.00239e-02 |
2.013e-02 |
X-ray |
|
5.07000e-02 |
3.412e-02 |
Gamma |
|
6.78000e-02 |
1.918e-01 |
Gamma |
|
7.14000e-02 |
1.073e-02 |
Gamma |
|
7.86000e-02 |
9.100e-02 |
Gamma |
|
8.04000e-02 |
1.235e-02 |
Gamma |
|
9.57000e-02 |
6.988e-02 |
Gamma |
|
1.46400e-01 |
3.250e-02 |
Gamma |
|
1.59800e-01 |
1.365e-02 |
Gamma |
|
1.76900e-01 |
1.300e-02 |
Gamma |
|
2.27500e-01 |
1.625e-02 |
Gamma |
|
6.13400e-01 |
1.268e-02 |
Gamma |
|
6.59500e-01 |
1.333e-02 |
Gamma |
|
6.64900e-01 |
3.055e-02 |
Gamma |
|
6.76600e-01 |
1.885e-02 |
Gamma |
|
6.81900e-01 |
2.307e-02 |
Gamma |
|
8.04700e-01 |
2.567e-02 |
Gamma |
|
1.09480e+00 |
1.202e-02 |
Gamma |
|
3.36783e-01 |
1.080e-02 |
Beta |
|
4.83204e-01 |
2.455e-02 |
Beta |
|
4.97570e-01 |
1.080e-02 |
Beta |
|
5.74131e-01 |
1.375e-02 |
Beta |
|
6.06742e-01 |
4.615e-02 |
Beta |
|
6.62382e-01 |
3.240e-02 |
Beta |
|
6.67524e-01 |
6.480e-02 |
Beta |
|
6.77291e-01 |
2.062e-02 |
Beta |
|
7.24622e-01 |
1.276e-02 |
Beta |
|
8.85287e-01 |
2.258e-02 |
Beta |
|
8.90774e-01 |
1.375e-01 |
Beta |
|
9.27079e-01 |
3.633e-01 |
Beta |
|
9.38054e-01 |
4.909e-02 |
Beta |
|
9.62368e-01 |
1.865e-01 |
Beta |
|
1.68638e-05 |
7.547e-01 |
Auger electron |
|
1.13388e-04 |
5.047e+00 |
Auger electron |
|
1.23519e-04 |
4.152e-01 |
Auger electron |
|
1.82344e-04 |
7.855e-01 |
Auger electron |
|
3.97000e-04 |
4.288e-01 |
Conversion electron |
|
5.71241e-04 |
1.572e-01 |
Auger electron |
|
6.97002e-04 |
2.821e-02 |
Conversion electron |
|
8.97831e-04 |
1.703e+00 |
Auger electron |
|
1.07550e-03 |
1.156e-01 |
Auger electron |
|
4.77207e-03 |
6.261e-01 |
Auger electron |
|
5.92803e-03 |
2.195e-01 |
Auger electron |
|
7.11861e-03 |
1.907e-02 |
Auger electron |
|
8.75020e-03 |
2.359e-02 |
Conversion electron |
|
9.15300e-03 |
2.334e-02 |
Conversion electron |
|
9.85730e-03 |
3.627e-02 |
Conversion electron |
|
1.55582e-02 |
1.860e-02 |
Conversion electron |
|
1.74970e-02 |
1.310e-01 |
Conversion electron |
|
2.10970e-02 |
6.598e-02 |
Conversion electron |
|
2.82970e-02 |
4.229e-02 |
Conversion electron |
|
3.00970e-02 |
5.001e-02 |
Conversion electron |
|
3.47387e-02 |
4.030e-02 |
Auger electron |
|
4.00970e-02 |
1.667e-02 |
Conversion electron |
|
4.11460e-02 |
1.995e-02 |
Auger electron |
|
4.23502e-02 |
5.663e-02 |
Conversion electron |
|
4.53970e-02 |
1.592e-01 |
Conversion electron |
|
4.91582e-02 |
1.361e-02 |
Conversion electron |
|
5.51970e-02 |
1.073e-02 |
Conversion electron |
|
5.94502e-02 |
1.288e-02 |
Conversion electron |
|
8.73502e-02 |
2.101e-02 |
Conversion electron |
|
9.60970e-02 |
1.927e-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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