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Radionuclide Dosimetric Data Sheets

Europium-148

Summary data

General

Classification

Isotope:  Eu-148
Atomic number (Z):  63
Mass number (A):  148
Neutron number (N):  85

Radioactive decay

Decay modes:  α, β+, Electron capture
Half-life:  54.5 [d]
Decay constant:  1.4720e-07 [1/s]
Daughters:  Sm-148 (100.0%), Pm-144 (9.4e-07%)
Radioactive daughters:  Sm-148, Pm-144

Dosimetric constants

Mean alpha energy:  0.0 [MeV]
Mean electron energy:  0.02241 [MeV]
Mean photon energy:  2.22867 [MeV]
Air kerma rate constant, Γ10:  8.302e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair:  8.306e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or electrons), Δwp:  3.590e-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-:  3.590e-15 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp:  3.571e-13 [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-148 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-148 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-148 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-148 Summary Spectrum.csv

 

Energy [MeV]

Yield [#/nt] if > 0.01

Radiation type

1.45286e-05

1.008e+01

X-ray

9.69722e-04

1.177e-02

X-ray

5.62210e-03

5.865e-02

X-ray

6.20531e-03

3.715e-02

X-ray

3.95578e-02

2.265e-01

X-ray

4.01680e-02

4.100e-01

X-ray

4.53441e-02

4.109e-02

X-ray

4.54683e-02

7.950e-02

X-ray

4.66259e-02

1.730e-02

X-ray

2.41653e-01

1.438e-02

Gamma

3.11570e-01

1.790e-02

Gamma

4.14028e-01

1.028e-01

Gamma

4.14057e-01

1.007e-01

Gamma

4.32745e-01

2.840e-02

Gamma

5.50284e-01

9.850e-01

Gamma

5.53231e-01

1.294e-01

Gamma

5.53260e-01

5.033e-02

Gamma

5.71962e-01

9.563e-02

Gamma

6.11293e-01

2.049e-01

Gamma

6.29987e-01

7.190e-01

Gamma

6.54220e-01

1.618e-02

Gamma

6.83153e-01

1.280e-02

Gamma

7.14769e-01

1.718e-02

Gamma

7.25673e-01

1.265e-01

Gamma

8.69891e-01

5.486e-02

Gamma

9.15331e-01

2.596e-02

Gamma

9.29850e-01

1.222e-02

Gamma

9.30807e-01

1.366e-02

Gamma

9.67306e-01

2.703e-02

Gamma

1.03399e+00

7.765e-02

Gamma

1.14681e+00

1.963e-02

Gamma

1.18321e+00

1.661e-02

Gamma

1.32850e+00

1.316e-02

Gamma

1.34387e+00

1.690e-02

Gamma

1.34474e+00

1.891e-02

Gamma

1.46063e+00

1.165e-02

Gamma

1.62151e+00

4.645e-02

Gamma

1.65044e+00

3.710e-02

Gamma

1.51033e-05

7.896e-01

Auger electron

9.43977e-05

6.453e-01

Auger electron

1.06698e-04

4.217e+00

Auger electron

1.68913e-04

6.766e-01

Auger electron

5.11725e-04

1.392e-01

Auger electron

8.03971e-04

1.441e+00

Auger electron

9.74325e-04

9.232e-02

Auger electron

4.46192e-03

5.364e-01

Auger electron

5.51250e-03

1.834e-01

Auger electron

6.59706e-03

1.564e-02

Auger electron

3.25196e-02

3.910e-02

Auger electron

3.84443e-02

1.905e-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

 

 

 

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