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Radionuclide Dosimetric Data Sheets

Europium-145

Isotope:  Eu-145
Atomic number (Z):  63
Mass number (A):  145
Neutron number (N):  82

Decay modes:  β+, Electron capture
Half-life:  5.93 [d]
Decay constant:  1.3529e-06 [1/s]
Daughters:  Sm-145 (100.0%)
Radioactive daughters:  Sm-145

Mean alpha energy:  0.0 [MeV]
Mean electron energy:  0.02538 [MeV]
Mean photon energy:  1.27977 [MeV]
Air kerma rate constant, Γ₁₀:  4.472e-17 [Gy·m²/Bq·s]
Air kerma coefficient, K_air:  4.552e-17 [Gy·m²/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or electrons), Δ_wp:  4.066e-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-:  4.066e-15 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δ_p:  2.050e-13 [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-145 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-145 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-145 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-145 Summary Spectrum.csv

 

Energy [MeV]	Yield [#/nt] if > 0.01	Radiation type
1.45273e-05	9.901e+00	X-ray
9.69519e-04	1.158e-02	X-ray
5.62210e-03	5.804e-02	X-ray
6.20531e-03	3.684e-02	X-ray
3.95578e-02	2.243e-01	X-ray
4.01680e-02	4.059e-01	X-ray
4.53441e-02	4.068e-02	X-ray
4.54683e-02	7.870e-02	X-ray
4.66259e-02	1.713e-02	X-ray
1.10943e-01	1.918e-02	Gamma
5.11000e-01	4.094e-02	Annihilation photon
5.42570e-01	4.468e-02	Gamma
6.53512e-01	1.505e-01	Gamma
7.64740e-01	1.682e-02	Gamma
8.93730e-01	6.570e-01	Gamma
1.65853e+00	1.491e-01	Gamma
1.80426e+00	1.071e-02	Gamma
1.87667e+00	1.334e-02	Gamma
1.99700e+00	7.161e-02	Gamma
7.39243e-01	1.375e-02	Positron
1.51033e-05	7.746e-01	Auger electron
9.43026e-05	6.336e-01	Auger electron
1.06709e-04	4.140e+00	Auger electron
1.68932e-04	6.618e-01	Auger electron
5.09285e-04	1.319e-01	Auger electron
8.03830e-04	1.419e+00	Auger electron
9.73955e-04	9.084e-02	Auger electron
4.45903e-03	5.282e-01	Auger electron
5.50921e-03	1.806e-01	Auger electron
6.59315e-03	1.540e-02	Auger electron
3.25196e-02	3.871e-02	Auger electron
3.84443e-02	1.886e-02	Auger electron
6.40670e-02	1.777e-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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