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Radionuclide Dosimetric Data Sheets
Erbium-173
Summary data
General
Classification
Isotope: Er-173
Atomic number (Z): 68
Mass number (A): 173
Neutron number (N): 105
Radioactive decay
Decay modes: β-
Half-life: 1.434 [m]
Decay constant: 8.0561e-03 [1/s]
Daughters: Tm-173 (100.0%)
Radioactive daughters: Tm-173
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.72134 [MeV]
Mean photon energy: 0.83127 [MeV]
Air kerma rate constant, Γ10: 2.979e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 2.979e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 1.156e-13 [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-:
1.156e-13 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 1.332e-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/Er-173 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-173 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-173 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-173 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.36559e-05 |
1.406e+01 |
X-ray |
|
1.45854e-03 |
3.259e-02 |
X-ray |
|
7.16830e-03 |
7.521e-02 |
X-ray |
|
8.11341e-03 |
5.664e-02 |
X-ray |
|
8.45978e-03 |
1.281e-02 |
X-ray |
|
9.44243e-03 |
1.006e-02 |
X-ray |
|
4.98586e-02 |
1.750e-01 |
X-ray |
|
5.08500e-02 |
3.093e-01 |
X-ray |
|
5.74128e-02 |
3.241e-02 |
X-ray |
|
5.76229e-02 |
6.264e-02 |
X-ray |
|
5.91642e-02 |
1.392e-02 |
X-ray |
|
9.42000e-02 |
4.800e-02 |
Gamma |
|
1.16140e-01 |
1.872e-01 |
Gamma |
|
1.18600e-01 |
2.544e-02 |
Gamma |
|
1.22400e-01 |
2.064e-01 |
Gamma |
|
1.92800e-01 |
4.656e-01 |
Gamma |
|
1.99200e-01 |
4.800e-01 |
Gamma |
|
8.00800e-01 |
9.600e-02 |
Gamma |
|
8.95200e-01 |
5.376e-01 |
Gamma |
|
4.97615e-01 |
6.364e-01 |
Beta |
|
8.42315e-01 |
1.313e-01 |
Beta |
|
8.83850e-01 |
2.323e-01 |
Beta |
|
2.06752e-05 |
7.308e-01 |
Auger electron |
|
1.47186e-04 |
6.321e+00 |
Auger electron |
|
2.46304e-04 |
2.303e-01 |
Auger electron |
|
2.61100e-04 |
1.754e+00 |
Auger electron |
|
5.94900e-04 |
8.334e-01 |
Conversion electron |
|
8.19421e-04 |
8.810e-02 |
Auger electron |
|
1.22083e-03 |
2.051e+00 |
Auger electron |
|
1.43672e-03 |
1.070e-01 |
Auger electron |
|
2.46000e-03 |
2.358e-01 |
Conversion electron |
|
5.64781e-03 |
4.357e-01 |
Auger electron |
|
7.08087e-03 |
1.562e-01 |
Auger electron |
|
8.54511e-03 |
1.420e-02 |
Auger electron |
|
3.47120e-02 |
1.533e-01 |
Conversion electron |
|
4.07026e-02 |
2.205e-02 |
Auger electron |
|
4.84128e-02 |
1.122e-02 |
Auger electron |
|
5.66520e-02 |
2.893e-01 |
Conversion electron |
|
5.91120e-02 |
1.757e-02 |
Conversion electron |
|
6.29120e-02 |
1.314e-01 |
Conversion electron |
|
8.41190e-02 |
2.116e-02 |
Conversion electron |
|
1.06059e-01 |
3.882e-02 |
Conversion electron |
|
1.06511e-01 |
1.724e-02 |
Conversion electron |
|
1.07502e-01 |
1.339e-02 |
Conversion electron |
|
1.12319e-01 |
1.287e-02 |
Conversion electron |
|
1.12771e-01 |
6.134e-02 |
Conversion electron |
|
1.13762e-01 |
5.522e-02 |
Conversion electron |
|
1.14275e-01 |
1.613e-02 |
Conversion electron |
|
1.20535e-01 |
3.158e-02 |
Conversion electron |
|
1.33312e-01 |
2.314e-02 |
Conversion electron |
|
1.39712e-01 |
2.193e-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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