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Radionuclide Dosimetric Data Sheets
Hafnium-175
Summary data
General
Classification
Isotope: Hf-175
Atomic number (Z): 72
Mass number (A): 175
Neutron number (N): 103
Radioactive decay
Decay modes: Electron capture
Half-life: 70.0 [d]
Decay constant: 1.1461e-07 [1/s]
Daughters: Lu-175 (100.0%)
Radioactive daughters: None
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.04502 [MeV]
Mean photon energy: 0.35337 [MeV]
Air kerma rate constant, Γ10: 1.429e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 1.429e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 7.213e-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-:
7.213e-15 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 5.662e-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/Hf-175 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/Hf-175 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-175 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.40084e-05 |
1.122e+01 |
X-ray |
|
1.56965e-03 |
3.079e-02 |
X-ray |
|
7.59237e-03 |
1.268e-02 |
X-ray |
|
7.64540e-03 |
1.120e-01 |
X-ray |
|
8.72221e-03 |
6.798e-02 |
X-ray |
|
9.04391e-03 |
1.928e-02 |
X-ray |
|
1.01636e-02 |
1.223e-02 |
X-ray |
|
5.30692e-02 |
2.656e-01 |
X-ray |
|
5.41988e-02 |
4.664e-01 |
X-ray |
|
6.11839e-02 |
4.942e-02 |
X-ray |
|
6.14258e-02 |
9.550e-02 |
X-ray |
|
6.30318e-02 |
1.105e-02 |
X-ray |
|
6.30870e-02 |
2.137e-02 |
X-ray |
|
8.93600e-02 |
2.402e-02 |
Gamma |
|
3.43400e-01 |
8.400e-01 |
Gamma |
|
4.33000e-01 |
1.436e-02 |
Gamma |
|
9.98291e-06 |
9.787e-01 |
Auger electron |
|
2.16360e-05 |
1.386e+00 |
Auger electron |
|
1.56496e-04 |
4.005e+00 |
Auger electron |
|
2.65777e-04 |
1.218e-01 |
Auger electron |
|
2.67184e-04 |
7.205e-01 |
Auger electron |
|
5.49522e-04 |
2.024e-01 |
Auger electron |
|
1.30976e-03 |
1.679e+00 |
Auger electron |
|
1.48495e-03 |
8.074e-02 |
Auger electron |
|
5.97784e-03 |
5.425e-01 |
Auger electron |
|
7.53339e-03 |
1.982e-01 |
Auger electron |
|
9.11963e-03 |
1.836e-02 |
Auger electron |
|
2.59180e-02 |
1.048e-01 |
Conversion electron |
|
4.32341e-02 |
3.071e-02 |
Auger electron |
|
5.15128e-02 |
1.580e-02 |
Auger electron |
|
7.85150e-02 |
1.474e-02 |
Conversion electron |
|
2.79958e-01 |
8.324e-02 |
Conversion electron |
|
3.32555e-01 |
1.154e-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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