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Radionuclide Dosimetric Data Sheets
Holmium-167
Summary data
General
Classification
Isotope: Ho-167
Atomic number (Z): 67
Mass number (A): 167
Neutron number (N): 100
Radioactive decay
Decay modes: β-
Half-life: 3.1 [h]
Decay constant: 6.2110e-05 [1/s]
Daughters: Er-167 (100.0%)
Radioactive daughters: None
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.2329 [MeV]
Mean photon energy: 0.36606 [MeV]
Air kerma rate constant, Γ10: 1.370e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 1.370e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 3.731e-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-:
3.731e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 5.865e-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/Ho-167 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/Ho-167 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/Ho-167 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/Ho-167 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.35556e-05 |
3.429e+00 |
X-ray |
|
6.93540e-03 |
3.020e-02 |
X-ray |
|
7.81980e-03 |
2.474e-02 |
X-ray |
|
4.82994e-02 |
6.488e-02 |
X-ray |
|
4.92265e-02 |
1.151e-01 |
X-ray |
|
5.55821e-02 |
1.199e-02 |
X-ray |
|
5.57777e-02 |
2.318e-02 |
X-ray |
|
7.93000e-02 |
2.166e-02 |
Gamma |
|
8.35000e-02 |
1.539e-02 |
Gamma |
|
2.07800e-01 |
5.016e-02 |
Gamma |
|
2.37900e-01 |
5.130e-02 |
Gamma |
|
3.21300e-01 |
2.394e-01 |
Gamma |
|
3.46500e-01 |
5.700e-01 |
Gamma |
|
3.86200e-01 |
3.420e-02 |
Gamma |
|
4.03000e-01 |
3.306e-02 |
Gamma |
|
4.60000e-01 |
2.109e-02 |
Gamma |
|
7.30277e-02 |
3.009e-02 |
Beta |
|
9.71344e-02 |
4.313e-01 |
Beta |
|
1.77457e-01 |
2.708e-02 |
Beta |
|
2.07462e-01 |
2.106e-01 |
Beta |
|
3.08393e-01 |
1.505e-01 |
Beta |
|
3.39541e-01 |
1.505e-01 |
Beta |
|
1.98170e-05 |
1.672e-01 |
Auger electron |
|
1.41493e-04 |
1.544e+00 |
Auger electron |
|
2.01191e-04 |
5.515e-02 |
Auger electron |
|
2.36357e-04 |
2.654e-01 |
Auger electron |
|
7.45681e-04 |
5.404e-02 |
Auger electron |
|
1.13500e-03 |
5.690e-01 |
Auger electron |
|
1.31177e-03 |
2.832e-02 |
Auger electron |
|
5.50287e-03 |
1.975e-01 |
Auger electron |
|
6.88074e-03 |
7.050e-02 |
Auger electron |
|
2.17260e-02 |
9.873e-02 |
Conversion electron |
|
2.59260e-02 |
5.843e-02 |
Conversion electron |
|
4.73838e-02 |
1.240e-02 |
Conversion electron |
|
4.87526e-02 |
1.010e-02 |
Conversion electron |
|
6.45252e-02 |
1.304e-02 |
Conversion electron |
|
6.54526e-02 |
1.376e-02 |
Conversion electron |
|
6.95838e-02 |
1.331e-02 |
Conversion electron |
|
1.50226e-01 |
2.385e-02 |
Conversion electron |
|
1.80326e-01 |
1.114e-02 |
Conversion electron |
|
1.98525e-01 |
2.008e-02 |
Conversion electron |
|
1.99453e-01 |
1.234e-02 |
Conversion electron |
|
2.63726e-01 |
2.277e-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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