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Radionuclide Dosimetric Data Sheets
Europium-150m
Summary data
General
Classification
Isotope: Eu-150m
Atomic number (Z): 63
Mass number (A): 150
Neutron number (N): 87
Radioactive decay
Decay modes: β-, β+, Electron capture
Half-life: 12.8 [h]
Decay constant: 1.5042e-05 [1/s]
Daughters: Gd-150 (89.0%), Sm-150 (11.0%)
Radioactive daughters: Gd-150
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.31218 [MeV]
Mean photon energy: 0.04935 [MeV]
Air kerma rate constant, Γ10: 1.702e-18 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 1.954e-18 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 5.002e-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-:
5.002e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 7.907e-15
[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-150m 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-150m 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-150m 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-150m Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.45270e-05 |
1.040e+00 |
X-ray |
|
3.95578e-02 |
2.379e-02 |
X-ray |
|
4.01680e-02 |
4.306e-02 |
X-ray |
|
3.33900e-01 |
3.960e-02 |
Gamma |
|
4.06500e-01 |
2.812e-02 |
Gamma |
|
5.11000e-01 |
1.303e-02 |
Annihilation photon |
|
3.44352e-01 |
8.898e-01 |
Beta |
|
1.51033e-05 |
8.138e-02 |
Auger electron |
|
9.42983e-05 |
6.656e-02 |
Auger electron |
|
1.06709e-04 |
4.350e-01 |
Auger electron |
|
1.68903e-04 |
6.951e-02 |
Auger electron |
|
5.09284e-04 |
1.383e-02 |
Auger electron |
|
8.03810e-04 |
1.491e-01 |
Auger electron |
|
4.45853e-03 |
5.553e-02 |
Auger electron |
|
5.50868e-03 |
1.898e-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
MIRDsoft MIRDspecs version 20250101 (www.mirdsoft.org)
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