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Radionuclide Dosimetric Data Sheets
Holmium-159
Summary data
General
Classification
Isotope: Ho-159
Atomic number (Z): 67
Mass number (A): 159
Neutron number (N): 92
Radioactive decay
Decay modes: β+, Electron capture
Half-life: 33.05 [m]
Decay constant: 3.4954e-04 [1/s]
Daughters: Dy-159 (100.0%)
Radioactive daughters: Dy-159
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.05759 [MeV]
Mean photon energy: 0.38572 [MeV]
Air kerma rate constant, Γ10: 1.498e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 1.507e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 9.227e-15 [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-:
9.227e-15 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 6.180e-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-159 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-159 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-159 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-159 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.37139e-05 |
1.834e+01 |
X-ray |
|
1.22958e-03 |
3.492e-02 |
X-ray |
|
5.76280e-03 |
1.129e-02 |
X-ray |
|
6.44440e-03 |
1.651e-02 |
X-ray |
|
6.48150e-03 |
1.459e-01 |
X-ray |
|
7.25411e-03 |
9.996e-02 |
X-ray |
|
7.35039e-03 |
1.214e-02 |
X-ray |
|
7.62077e-03 |
2.470e-02 |
X-ray |
|
8.42363e-03 |
1.753e-02 |
X-ray |
|
4.11820e-02 |
1.148e-02 |
Gamma |
|
4.52703e-02 |
4.362e-01 |
X-ray |
|
4.60801e-02 |
7.796e-01 |
X-ray |
|
5.20302e-02 |
8.024e-02 |
X-ray |
|
5.21989e-02 |
1.551e-01 |
X-ray |
|
5.35316e-02 |
1.766e-02 |
X-ray |
|
5.35696e-02 |
3.421e-02 |
X-ray |
|
5.66260e-02 |
5.177e-02 |
Gamma |
|
7.98070e-02 |
1.846e-02 |
Gamma |
|
1.00599e-01 |
4.815e-02 |
Gamma |
|
1.21012e-01 |
3.620e-01 |
Gamma |
|
1.31973e-01 |
2.360e-01 |
Gamma |
|
1.52375e-01 |
1.064e-02 |
Gamma |
|
1.55851e-01 |
1.940e-02 |
Gamma |
|
1.73155e-01 |
2.143e-02 |
Gamma |
|
1.77608e-01 |
5.358e-02 |
Gamma |
|
1.86274e-01 |
3.367e-02 |
Gamma |
|
2.17647e-01 |
3.656e-02 |
Gamma |
|
2.52963e-01 |
1.368e-01 |
Gamma |
|
2.58822e-01 |
1.839e-02 |
Gamma |
|
3.09594e-01 |
1.723e-01 |
Gamma |
|
7.06648e-01 |
1.180e-02 |
Gamma |
|
8.07236e-01 |
1.281e-02 |
Gamma |
|
8.38625e-01 |
3.841e-02 |
Gamma |
|
1.81686e-05 |
1.017e+00 |
Auger electron |
|
1.28541e-04 |
8.370e+00 |
Auger electron |
|
1.55577e-04 |
4.121e-01 |
Auger electron |
|
2.09925e-04 |
1.355e+00 |
Auger electron |
|
6.60787e-04 |
2.834e-01 |
Auger electron |
|
1.01722e-03 |
2.903e+00 |
Auger electron |
|
1.19335e-03 |
1.580e-01 |
Auger electron |
|
2.76500e-03 |
5.441e-01 |
Conversion electron |
|
5.12926e-03 |
1.037e+00 |
Auger electron |
|
6.39272e-03 |
3.651e-01 |
Auger electron |
|
7.69037e-03 |
3.236e-02 |
Auger electron |
|
2.14145e-02 |
1.191e-02 |
Conversion electron |
|
2.23655e-02 |
4.016e-02 |
Conversion electron |
|
2.27873e-02 |
2.889e-02 |
Conversion electron |
|
2.35970e-02 |
3.289e-02 |
Conversion electron |
|
2.59460e-02 |
7.223e-02 |
Conversion electron |
|
2.97159e-02 |
2.352e-02 |
Conversion electron |
|
3.70640e-02 |
6.206e-02 |
Auger electron |
|
4.39727e-02 |
3.104e-02 |
Auger electron |
|
4.67380e-02 |
1.223e-02 |
Conversion electron |
|
4.76135e-02 |
7.359e-02 |
Conversion electron |
|
4.80353e-02 |
2.144e-02 |
Conversion electron |
|
4.88450e-02 |
1.841e-02 |
Conversion electron |
|
5.49639e-02 |
2.558e-02 |
Conversion electron |
|
6.71510e-02 |
5.629e-02 |
Conversion electron |
|
7.81120e-02 |
2.915e-02 |
Conversion electron |
|
1.99102e-01 |
2.126e-02 |
Conversion electron |
|
2.55733e-01 |
1.558e-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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