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Radionuclide Dosimetric Data Sheets
Holmium-170
Summary data
General
Classification
Isotope: Ho-170
Atomic number (Z): 67
Mass number (A): 170
Neutron number (N): 103
Radioactive decay
Decay modes: β-
Half-life: 2.76 [m]
Decay constant: 4.1857e-03 [1/s]
Daughters: Er-170 (100.0%)
Radioactive daughters: None
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.83661 [MeV]
Mean photon energy: 1.7041 [MeV]
Air kerma rate constant, Γ10: 6.127e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 6.127e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 1.340e-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-:
1.340e-13 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 2.730e-13
[Gy·kg/Bq·s]
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-170 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-170 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-170 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.35350e-05 |
9.824e+00 |
X-ray |
|
1.36726e-03 |
2.382e-02 |
X-ray |
|
6.89239e-03 |
1.019e-02 |
X-ray |
|
6.93539e-03 |
8.998e-02 |
X-ray |
|
7.81979e-03 |
7.690e-02 |
X-ray |
|
8.17512e-03 |
1.530e-02 |
X-ray |
|
9.09455e-03 |
1.360e-02 |
X-ray |
|
4.82994e-02 |
1.427e-01 |
X-ray |
|
4.92265e-02 |
2.532e-01 |
X-ray |
|
5.13000e-02 |
2.462e-02 |
Gamma |
|
5.55822e-02 |
2.637e-02 |
X-ray |
|
5.57777e-02 |
5.097e-02 |
X-ray |
|
5.72611e-02 |
1.130e-02 |
X-ray |
|
7.86500e-02 |
1.123e-01 |
Gamma |
|
8.71600e-02 |
1.037e-02 |
Gamma |
|
9.46700e-02 |
2.398e-02 |
Gamma |
|
1.03540e-01 |
4.428e-02 |
Gamma |
|
1.23900e-01 |
3.456e-02 |
Gamma |
|
1.41500e-01 |
1.685e-02 |
Gamma |
|
1.65360e-01 |
3.650e-02 |
Gamma |
|
1.81570e-01 |
2.333e-01 |
Gamma |
|
2.18690e-01 |
1.123e-02 |
Gamma |
|
2.27410e-01 |
3.456e-02 |
Gamma |
|
2.58170e-01 |
3.629e-01 |
Gamma |
|
2.80440e-01 |
2.592e-02 |
Gamma |
|
2.83420e-01 |
2.592e-02 |
Gamma |
|
4.13200e-01 |
3.089e-02 |
Gamma |
|
4.77400e-01 |
3.326e-02 |
Gamma |
|
6.62900e-01 |
1.188e-02 |
Gamma |
|
7.46000e-01 |
1.512e-02 |
Gamma |
|
7.50400e-01 |
5.184e-02 |
Gamma |
|
7.86300e-01 |
4.752e-02 |
Gamma |
|
8.43500e-01 |
2.376e-02 |
Gamma |
|
8.54700e-01 |
1.037e-01 |
Gamma |
|
8.54700e-01 |
1.555e-02 |
Gamma |
|
8.67000e-01 |
2.095e-02 |
Gamma |
|
8.90200e-01 |
2.160e-01 |
Gamma |
|
9.32100e-01 |
3.542e-01 |
Gamma |
|
9.34100e-01 |
3.672e-02 |
Gamma |
|
9.41400e-01 |
2.030e-01 |
Gamma |
|
9.57400e-01 |
3.672e-02 |
Gamma |
|
9.76500e-01 |
2.851e-02 |
Gamma |
|
1.02470e+00 |
1.512e-02 |
Gamma |
|
1.04420e+00 |
6.307e-02 |
Gamma |
|
1.11180e+00 |
2.030e-02 |
Gamma |
|
1.13870e+00 |
2.009e-01 |
Gamma |
|
1.15300e+00 |
1.922e-02 |
Gamma |
|
1.22600e+00 |
3.024e-02 |
Gamma |
|
6.31744e-01 |
6.940e-01 |
Beta |
|
8.79947e-01 |
1.331e-01 |
Beta |
|
9.58891e-01 |
1.593e-02 |
Beta |
|
9.77111e-01 |
4.664e-02 |
Beta |
|
9.88853e-01 |
5.119e-02 |
Beta |
|
1.03771e+00 |
3.299e-02 |
Beta |
|
1.35145e+00 |
2.617e-02 |
Beta |
|
1.98170e-05 |
4.731e-01 |
Auger electron |
|
1.41555e-04 |
4.422e+00 |
Auger electron |
|
1.98742e-04 |
1.564e-01 |
Auger electron |
|
2.36251e-04 |
7.463e-01 |
Auger electron |
|
7.24348e-04 |
1.110e-01 |
Auger electron |
|
1.13426e-03 |
1.660e+00 |
Auger electron |
|
1.30931e-03 |
8.241e-02 |
Auger electron |
|
5.48032e-03 |
5.732e-01 |
Auger electron |
|
6.85452e-03 |
2.043e-01 |
Auger electron |
|
8.26055e-03 |
1.841e-02 |
Auger electron |
|
2.10760e-02 |
1.910e-01 |
Conversion electron |
|
2.95860e-02 |
3.809e-02 |
Conversion electron |
|
3.70960e-02 |
6.941e-02 |
Conversion electron |
|
3.94671e-02 |
1.882e-02 |
Auger electron |
|
4.59660e-02 |
9.894e-02 |
Conversion electron |
|
6.63260e-02 |
4.640e-02 |
Conversion electron |
|
6.89338e-02 |
1.874e-02 |
Conversion electron |
|
6.93752e-02 |
2.381e-01 |
Conversion electron |
|
7.03026e-02 |
2.471e-01 |
Conversion electron |
|
7.68538e-02 |
1.233e-01 |
Conversion electron |
|
7.86500e-02 |
3.242e-02 |
Conversion electron |
|
9.38238e-02 |
1.354e-02 |
Conversion electron |
|
1.23996e-01 |
5.005e-02 |
Conversion electron |
|
1.72295e-01 |
1.070e-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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