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Radionuclide Dosimetric Data Sheets
Europium-152m
Summary data
General
Classification
Isotope: Eu-152m
Atomic number (Z): 63
Mass number (A): 152
Neutron number (N): 89
Radioactive decay
Decay modes: β-, β+, Electron capture
Half-life: 9.312 [h]
Decay constant: 2.0678e-05 [1/s]
Daughters: Gd-152 (72.0%), Sm-152 (28.0%)
Radioactive daughters: Gd-152
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.50598 [MeV]
Mean photon energy: 0.29632 [MeV]
Air kerma rate constant, Γ10: 1.111e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 1.112e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 8.107e-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-:
8.107e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 4.748e-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-152m 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-152m 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-152m 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-152m Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.45281e-05 |
3.506e+00 |
X-ray |
|
1.94278e-05 |
1.383e-02 |
X-ray |
|
5.62210e-03 |
2.051e-02 |
X-ray |
|
6.20531e-03 |
1.348e-02 |
X-ray |
|
3.95578e-02 |
7.488e-02 |
X-ray |
|
4.01680e-02 |
1.355e-01 |
X-ray |
|
4.53441e-02 |
1.358e-02 |
X-ray |
|
4.54683e-02 |
2.628e-02 |
X-ray |
|
1.21777e-01 |
6.999e-02 |
Gamma |
|
3.44310e-01 |
2.381e-02 |
Gamma |
|
8.41594e-01 |
1.417e-01 |
Gamma |
|
9.63390e-01 |
1.166e-01 |
Gamma |
|
1.68671e-01 |
1.567e-02 |
Beta |
|
5.53893e-01 |
1.656e-02 |
Beta |
|
7.03855e-01 |
6.860e-01 |
Beta |
|
1.51033e-05 |
2.740e-01 |
Auger electron |
|
9.41836e-05 |
2.247e-01 |
Auger electron |
|
1.06724e-04 |
1.465e+00 |
Auger electron |
|
1.69203e-04 |
2.338e-01 |
Auger electron |
|
5.05038e-04 |
4.480e-02 |
Auger electron |
|
8.03763e-04 |
5.035e-01 |
Auger electron |
|
9.73690e-04 |
3.223e-02 |
Auger electron |
|
4.45853e-03 |
1.872e-01 |
Auger electron |
|
5.50837e-03 |
6.400e-02 |
Auger electron |
|
3.25196e-02 |
1.293e-02 |
Auger electron |
|
7.49010e-02 |
4.735e-02 |
Conversion electron |
|
1.14459e-01 |
1.109e-02 |
Conversion electron |
|
1.15069e-01 |
1.095e-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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