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Radionuclide Dosimetric Data Sheets
Europium-154m
Summary data
General
Classification
Isotope: Eu-154m
Atomic number (Z): 63
Mass number (A): 154
Neutron number (N): 91
Radioactive decay
Decay modes: Internal transition
Half-life: 46.0 [m]
Decay constant: 2.5114e-04 [1/s]
Daughters: Eu-154 (100.0%)
Radioactive daughters: Eu-154
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.0745 [MeV]
Mean photon energy: 0.07061 [MeV]
Air kerma rate constant, Γ10: 3.334e-18 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 3.334e-18 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 1.194e-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-:
1.194e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 1.131e-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-154m 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-154m Summary 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-154m Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.43340e-05 |
2.931e+01 |
X-ray |
|
1.03383e-03 |
3.538e-02 |
X-ray |
|
5.19190e-03 |
1.130e-02 |
X-ray |
|
5.80160e-03 |
1.530e-02 |
X-ray |
|
5.83100e-03 |
1.353e-01 |
X-ray |
|
6.41408e-03 |
2.161e-02 |
X-ray |
|
6.45761e-03 |
1.031e-01 |
X-ray |
|
6.54849e-03 |
3.119e-02 |
X-ray |
|
6.82635e-03 |
2.267e-02 |
X-ray |
|
7.47704e-03 |
1.781e-02 |
X-ray |
|
3.17800e-02 |
5.180e-02 |
Gamma |
|
3.58020e-02 |
1.066e-01 |
Gamma |
|
4.09430e-02 |
8.048e-02 |
X-ray |
|
4.15992e-02 |
1.452e-01 |
X-ray |
|
4.69640e-02 |
1.465e-02 |
X-ray |
|
4.70984e-02 |
2.834e-02 |
X-ray |
|
6.81700e-02 |
3.700e-01 |
Gamma |
|
1.00880e-01 |
2.442e-01 |
Gamma |
|
1.58398e-05 |
2.202e+00 |
Auger electron |
|
3.88900e-05 |
1.744e-02 |
Auger electron |
|
1.12166e-04 |
1.450e+00 |
Auger electron |
|
1.12430e-04 |
1.277e+01 |
Auger electron |
|
1.31200e-04 |
1.391e-02 |
Conversion electron |
|
1.80918e-04 |
2.054e+00 |
Auger electron |
|
5.68121e-04 |
6.495e-01 |
Auger electron |
|
8.57382e-04 |
3.890e+00 |
Auger electron |
|
9.10000e-04 |
3.848e-01 |
Conversion electron |
|
9.75201e-04 |
2.575e-01 |
Conversion electron |
|
1.03464e-03 |
2.423e-01 |
Auger electron |
|
1.28190e-03 |
7.656e-02 |
Conversion electron |
|
1.63120e-03 |
4.045e-01 |
Conversion electron |
|
4.70392e-03 |
1.377e+00 |
Auger electron |
|
5.81456e-03 |
4.768e-01 |
Auger electron |
|
6.96422e-03 |
4.143e-02 |
Auger electron |
|
7.13040e-03 |
2.683e-01 |
Conversion electron |
|
7.83040e-03 |
1.886e-02 |
Conversion electron |
|
8.60000e-03 |
7.126e-02 |
Conversion electron |
|
1.94919e-02 |
7.142e-02 |
Conversion electron |
|
1.96020e-02 |
2.441e-01 |
Conversion electron |
|
2.37619e-02 |
3.101e-01 |
Conversion electron |
|
2.41552e-02 |
3.219e-02 |
Conversion electron |
|
2.48112e-02 |
1.146e-02 |
Conversion electron |
|
2.49852e-02 |
6.816e-02 |
Conversion electron |
|
2.56412e-02 |
8.883e-02 |
Conversion electron |
|
2.60404e-02 |
1.799e-02 |
Conversion electron |
|
2.77839e-02 |
4.453e-01 |
Conversion electron |
|
2.81772e-02 |
8.895e-02 |
Conversion electron |
|
2.88332e-02 |
7.151e-02 |
Conversion electron |
|
3.03104e-02 |
7.675e-02 |
Conversion electron |
|
3.11404e-02 |
3.680e-02 |
Conversion electron |
|
3.17800e-02 |
2.136e-02 |
Conversion electron |
|
3.36229e-02 |
1.320e-02 |
Auger electron |
|
3.43324e-02 |
1.332e-01 |
Conversion electron |
|
3.58020e-02 |
3.667e-02 |
Conversion electron |
|
5.23120e-02 |
5.700e-02 |
Conversion electron |
|
6.01519e-02 |
2.394e-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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