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Radionuclide Dosimetric Data Sheets
Erbium-154
Summary data
General
Classification
Isotope: Er-154
Atomic number (Z): 68
Mass number (A): 154
Neutron number (N): 86
Radioactive decay
Decay modes: α, β+, Electron capture
Half-life: 3.73 [m]
Decay constant: 3.0972e-03 [1/s]
Daughters: Ho-154 (99.5%), Dy-150 (0.47%)
Radioactive daughters: Ho-154, Dy-150
Dosimetric constants
Mean alpha energy: 0.0201 [MeV]
Mean electron energy: 0.03758 [MeV]
Mean photon energy: 0.07593 [MeV]
Air kerma rate constant, Γ10: 4.387e-18 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 5.454e-18 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 9.241e-15 [Gy·kg/Bq·s]
Equilibrium dose constant for alphas, Δα: 3.220e-15
[Gy·kg/Bq·s]
Equilibrium dose constant for betas/electrons, Δβ-,β+,e-:
6.021e-15 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 1.217e-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/Er-154 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/Er-154 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/Er-154 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/Er-154 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.36318e-05 |
1.355e+01 |
X-ray |
|
1.29953e-03 |
2.845e-02 |
X-ray |
|
6.66650e-03 |
1.244e-02 |
X-ray |
|
6.70640e-03 |
1.100e-01 |
X-ray |
|
7.53349e-03 |
7.746e-02 |
X-ray |
|
7.63171e-03 |
1.273e-02 |
X-ray |
|
7.89548e-03 |
1.865e-02 |
X-ray |
|
8.75507e-03 |
1.365e-02 |
X-ray |
|
2.69000e-02 |
3.200e-01 |
Gamma |
|
4.67702e-02 |
2.180e-01 |
X-ray |
|
4.76373e-02 |
3.882e-01 |
X-ray |
|
5.37885e-02 |
4.021e-02 |
X-ray |
|
5.39705e-02 |
7.772e-02 |
X-ray |
|
5.53966e-02 |
1.719e-02 |
X-ray |
|
5.11000e-01 |
5.514e-02 |
Annihilation photon |
|
4.52147e-01 |
2.757e-02 |
Positron |
|
1.89749e-05 |
7.089e-01 |
Auger electron |
|
1.34770e-04 |
6.169e+00 |
Auger electron |
|
1.79610e-04 |
2.541e-01 |
Auger electron |
|
2.22542e-04 |
1.033e+00 |
Auger electron |
|
7.12580e-04 |
2.582e-01 |
Auger electron |
|
1.07544e-03 |
2.163e+00 |
Auger electron |
|
1.25323e-03 |
1.128e-01 |
Auger electron |
|
5.32928e-03 |
7.620e-01 |
Auger electron |
|
6.65201e-03 |
2.703e-01 |
Auger electron |
|
8.00962e-03 |
2.420e-02 |
Auger electron |
|
1.75398e-02 |
1.912e-01 |
Conversion electron |
|
1.79713e-02 |
1.370e-01 |
Conversion electron |
|
1.88383e-02 |
1.980e-01 |
Conversion electron |
|
2.51715e-02 |
1.185e-01 |
Conversion electron |
|
2.69000e-02 |
3.073e-02 |
Conversion electron |
|
3.82545e-02 |
3.012e-02 |
Auger electron |
|
4.54244e-02 |
1.515e-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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