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Radionuclide Dosimetric Data Sheets

Europium-147

Isotope:  Eu-147
Atomic number (Z):  63
Mass number (A):  147
Neutron number (N):  84

Decay modes:  α, β+, Electron capture
Half-life:  24.1 [d]
Decay constant:  3.3289e-07 [1/s]
Daughters:  Sm-147 (100.0%), Pm-143 (0.0022%)
Radioactive daughters:  Sm-147, Pm-143

Mean alpha energy:  0.0 [MeV]
Mean electron energy:  0.04308 [MeV]
Mean photon energy:  0.47206 [MeV]
Air kerma rate constant, Γ₁₀:  1.855e-17 [Gy·m²/Bq·s]
Air kerma coefficient, K_air:  1.869e-17 [Gy·m²/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or electrons), Δ_wp:  6.902e-15 [Gy·kg/Bq·s]
Equilibrium dose constant for alphas, Δ_α:  0.000e+00 [Gy·kg/Bq·s]
Equilibrium dose constant for betas/electrons, Δ_β-,β+,e-:  6.902e-15 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δ_p:  7.563e-14 [Gy·kg/Bq·s]

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-147 DPK.csv

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-147 Summary Spectrum.csv

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-147 Beta Spectrum.csv

 

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-147 Summary Spectrum.csv

 

Energy [MeV]	Yield [#/nt] if > 0.01	Radiation type
1.45273e-05	1.299e+01	X-ray
9.69446e-04	1.521e-02	X-ray
5.62210e-03	7.618e-02	X-ray
6.20531e-03	4.878e-02	X-ray
6.57141e-03	1.270e-02	X-ray
3.95578e-02	2.913e-01	X-ray
4.01680e-02	5.273e-01	X-ray
4.53441e-02	5.285e-02	X-ray
4.54683e-02	1.022e-01	X-ray
4.65986e-02	1.146e-02	X-ray
4.66259e-02	2.225e-02	X-ray
1.21220e-01	2.292e-01	Gamma
1.97299e-01	2.650e-01	Gamma
6.01450e-01	5.883e-02	Gamma
6.77516e-01	9.778e-02	Gamma
7.98729e-01	4.849e-02	Gamma
8.56929e-01	2.703e-02	Gamma
9.33005e-01	3.445e-02	Gamma
9.55832e-01	3.842e-02	Gamma
1.07704e+00	6.148e-02	Gamma
1.51033e-05	1.016e+00	Auger electron
9.42576e-05	8.314e-01	Auger electron
1.06714e-04	5.429e+00	Auger electron
1.68997e-04	8.669e-01	Auger electron
5.08008e-04	1.707e-01	Auger electron
8.03788e-04	1.863e+00	Auger electron
9.73825e-04	1.192e-01	Auger electron
4.45860e-03	6.934e-01	Auger electron
5.50866e-03	2.371e-01	Auger electron
6.59240e-03	2.021e-02	Auger electron
2.91970e-02	2.708e-02	Conversion electron
3.25196e-02	5.029e-02	Auger electron
3.84443e-02	2.450e-02	Auger electron
7.43440e-02	1.912e-01	Conversion electron
1.13518e-01	2.436e-02	Conversion electron
1.50423e-01	4.150e-02	Conversion electron

 

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

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

 

 

 

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