<= Return to MIRDspec isotope database
Radionuclide Dosimetric Data Sheets
Hafnium-173
Summary data
General
Classification
Isotope: Hf-173
Atomic number (Z): 72
Mass number (A): 173
Neutron number (N): 101
Radioactive decay
Decay modes: β+, Electron capture
Half-life: 23.6 [h]
Decay constant: 8.1585e-06 [1/s]
Daughters: Lu-173 (100.0%)
Radioactive daughters: Lu-173
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.05235 [MeV]
Mean photon energy: 0.397 [MeV]
Air kerma rate constant, Γ10: 1.509e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 1.510e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 8.387e-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-:
8.387e-15 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 6.361e-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-173 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-173 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/Hf-173 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/Hf-173 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.39559e-05 |
1.660e+01 |
X-ray |
|
1.57539e-03 |
4.381e-02 |
X-ray |
|
7.59237e-03 |
1.475e-02 |
X-ray |
|
7.64540e-03 |
1.303e-01 |
X-ray |
|
8.72221e-03 |
8.176e-02 |
X-ray |
|
9.04392e-03 |
2.242e-02 |
X-ray |
|
1.01636e-02 |
1.471e-02 |
X-ray |
|
5.30692e-02 |
3.151e-01 |
X-ray |
|
5.41988e-02 |
5.533e-01 |
X-ray |
|
6.11839e-02 |
5.863e-02 |
X-ray |
|
6.14258e-02 |
1.133e-01 |
X-ray |
|
6.30318e-02 |
1.311e-02 |
X-ray |
|
6.30870e-02 |
2.534e-02 |
X-ray |
|
1.23675e-01 |
8.300e-01 |
Gamma |
|
1.34965e-01 |
4.739e-02 |
Gamma |
|
1.39635e-01 |
1.270e-01 |
Gamma |
|
1.62010e-01 |
6.457e-02 |
Gamma |
|
2.96974e-01 |
3.386e-01 |
Gamma |
|
3.06568e-01 |
6.424e-02 |
Gamma |
|
3.11239e-01 |
1.075e-01 |
Gamma |
|
9.88298e-06 |
1.460e+00 |
Auger electron |
|
2.16348e-05 |
2.081e+00 |
Auger electron |
|
1.56278e-04 |
5.961e+00 |
Auger electron |
|
2.66474e-04 |
1.828e-01 |
Auger electron |
|
2.74268e-04 |
1.220e+00 |
Auger electron |
|
5.67651e-04 |
2.026e-01 |
Auger electron |
|
1.31876e-03 |
2.379e+00 |
Auger electron |
|
1.50647e-03 |
1.189e-01 |
Auger electron |
|
2.65390e-03 |
4.578e-01 |
Conversion electron |
|
4.67000e-03 |
1.199e-01 |
Conversion electron |
|
5.97308e-03 |
6.292e-01 |
Auger electron |
|
7.52749e-03 |
2.298e-01 |
Auger electron |
|
7.57790e-03 |
2.930e-02 |
Conversion electron |
|
9.11209e-03 |
2.129e-02 |
Auger electron |
|
4.32341e-02 |
3.643e-02 |
Auger electron |
|
5.15128e-02 |
1.874e-02 |
Auger electron |
|
6.02330e-02 |
1.382e-01 |
Conversion electron |
|
7.15230e-02 |
3.351e-02 |
Conversion electron |
|
7.61930e-02 |
1.414e-01 |
Conversion electron |
|
1.12830e-01 |
1.502e-02 |
Conversion electron |
|
1.28790e-01 |
1.959e-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)
<= Return to MIRDspec isotope database
