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Radionuclide Dosimetric Data Sheets
Hafnium-170
Summary data
General
Classification
Isotope: Hf-170
Atomic number (Z): 72
Mass number (A): 170
Neutron number (N): 98
Radioactive decay
Decay modes: Electron capture
Half-life: 16.01 [h]
Decay constant: 1.2026e-05 [1/s]
Daughters: Lu-170 (100.0%)
Radioactive daughters: Lu-170
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.0687 [MeV]
Mean photon energy: 0.44027 [MeV]
Air kerma rate constant, Γ10: 1.801e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 1.801e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 1.101e-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-:
1.101e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 7.054e-14
[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/Hf-170 Summary 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/Hf-170 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.39994e-05 |
1.973e+01 |
X-ray |
|
1.57010e-03 |
5.376e-02 |
X-ray |
|
6.77270e-03 |
1.302e-02 |
X-ray |
|
7.59237e-03 |
2.116e-02 |
X-ray |
|
7.64541e-03 |
1.869e-01 |
X-ray |
|
8.58698e-03 |
1.110e-02 |
X-ray |
|
8.72221e-03 |
1.179e-01 |
X-ray |
|
8.82888e-03 |
1.451e-02 |
X-ray |
|
9.04390e-03 |
3.216e-02 |
X-ray |
|
1.01636e-02 |
2.121e-02 |
X-ray |
|
4.78000e-02 |
2.926e-02 |
Gamma |
|
5.30692e-02 |
3.095e-01 |
X-ray |
|
5.40300e-02 |
1.100e-02 |
Gamma |
|
5.41988e-02 |
5.435e-01 |
X-ray |
|
5.51900e-02 |
1.122e-02 |
Gamma |
|
6.11839e-02 |
5.759e-02 |
X-ray |
|
6.14258e-02 |
1.113e-01 |
X-ray |
|
6.30318e-02 |
1.288e-02 |
X-ray |
|
6.30870e-02 |
2.489e-02 |
X-ray |
|
9.85500e-02 |
3.300e-02 |
Gamma |
|
9.99300e-02 |
1.980e-02 |
Gamma |
|
1.20190e-01 |
1.507e-01 |
Gamma |
|
1.46320e-01 |
1.144e-02 |
Gamma |
|
1.62650e-01 |
1.364e-02 |
Gamma |
|
1.64710e-01 |
2.629e-01 |
Gamma |
|
2.08100e-01 |
2.684e-02 |
Gamma |
|
2.91400e-01 |
1.056e-02 |
Gamma |
|
3.08900e-01 |
2.068e-02 |
Gamma |
|
3.49000e-01 |
1.078e-02 |
Gamma |
|
4.81300e-01 |
3.674e-02 |
Gamma |
|
5.01600e-01 |
3.696e-02 |
Gamma |
|
5.40700e-01 |
2.442e-02 |
Gamma |
|
5.72900e-01 |
1.452e-01 |
Gamma |
|
6.20700e-01 |
1.797e-01 |
Gamma |
|
9.99454e-06 |
1.727e+00 |
Auger electron |
|
2.16363e-05 |
2.440e+00 |
Auger electron |
|
1.56471e-04 |
7.039e+00 |
Auger electron |
|
2.66865e-04 |
2.157e-01 |
Auger electron |
|
2.68978e-04 |
1.280e+00 |
Auger electron |
|
5.35079e-04 |
4.182e-01 |
Auger electron |
|
1.31019e-03 |
2.930e+00 |
Auger electron |
|
1.48644e-03 |
1.411e-01 |
Auger electron |
|
5.99974e-03 |
9.301e-01 |
Auger electron |
|
6.01700e-03 |
1.014e-02 |
Conversion electron |
|
6.97801e-03 |
1.934e-02 |
Conversion electron |
|
7.14680e-03 |
2.464e-02 |
Conversion electron |
|
7.55776e-03 |
3.402e-01 |
Auger electron |
|
8.03801e-03 |
1.851e-02 |
Conversion electron |
|
9.14742e-03 |
3.154e-02 |
Auger electron |
|
1.66880e-02 |
3.722e-02 |
Conversion electron |
|
1.75350e-02 |
3.542e-02 |
Conversion electron |
|
2.63639e-02 |
1.134e-02 |
Conversion electron |
|
3.41470e-02 |
1.051e-01 |
Conversion electron |
|
3.51080e-02 |
1.098e-01 |
Conversion electron |
|
3.52768e-02 |
1.201e-01 |
Conversion electron |
|
3.64880e-02 |
5.140e-02 |
Conversion electron |
|
3.69550e-02 |
1.127e-01 |
Conversion electron |
|
3.74270e-02 |
1.236e-02 |
Conversion electron |
|
3.75750e-02 |
2.198e-02 |
Conversion electron |
|
4.25039e-02 |
5.616e-02 |
Conversion electron |
|
4.31850e-02 |
2.959e-02 |
Conversion electron |
|
4.32341e-02 |
3.578e-02 |
Auger electron |
|
4.43450e-02 |
2.793e-02 |
Conversion electron |
|
4.45200e-02 |
1.496e-02 |
Conversion electron |
|
4.57839e-02 |
2.912e-02 |
Conversion electron |
|
5.15128e-02 |
1.841e-02 |
Auger electron |
|
5.25080e-02 |
1.329e-02 |
Conversion electron |
|
5.67480e-02 |
2.701e-02 |
Conversion electron |
|
8.77050e-02 |
1.542e-02 |
Conversion electron |
|
9.92080e-02 |
1.087e-02 |
Conversion electron |
|
1.01268e-01 |
2.081e-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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