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Radionuclide Dosimetric Data Sheets
Hafnium-179m
Summary data
General
Classification
Isotope: Hf-179m
Atomic number (Z): 72
Mass number (A): 179
Neutron number (N): 107
Radioactive decay
Decay modes: Internal transition
Half-life: 25.05 [d]
Decay constant: 3.2026e-07 [1/s]
Daughters: Hf-179 (100.0%)
Radioactive daughters: None
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.18969 [MeV]
Mean photon energy: 0.92069 [MeV]
Air kerma rate constant, Γ10: 3.532e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 3.532e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 3.039e-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-:
3.039e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 1.475e-13
[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-179m 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-179m 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-179m Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.93602e-05 |
2.179e+01 |
X-ray |
|
1.63738e-03 |
6.511e-02 |
X-ray |
|
6.98230e-03 |
1.582e-02 |
X-ray |
|
7.83281e-03 |
2.618e-02 |
X-ray |
|
7.88959e-03 |
2.310e-01 |
X-ray |
|
8.88688e-03 |
1.512e-02 |
X-ray |
|
9.03750e-03 |
1.071e-01 |
X-ray |
|
9.14599e-03 |
1.950e-02 |
X-ray |
|
9.34358e-03 |
4.014e-02 |
X-ray |
|
1.05374e-02 |
1.948e-02 |
X-ray |
|
5.47191e-02 |
3.279e-01 |
X-ray |
|
5.59237e-02 |
5.736e-01 |
X-ray |
|
6.31238e-02 |
6.107e-02 |
X-ray |
|
6.33831e-02 |
1.180e-01 |
X-ray |
|
6.50467e-02 |
1.373e-02 |
X-ray |
|
6.51063e-02 |
2.659e-02 |
X-ray |
|
1.22700e-01 |
2.758e-01 |
Gamma |
|
1.46150e-01 |
2.697e-01 |
Gamma |
|
1.69780e-01 |
1.933e-01 |
Gamma |
|
1.92660e-01 |
2.143e-01 |
Gamma |
|
2.17040e-01 |
8.991e-02 |
Gamma |
|
2.36480e-01 |
1.873e-01 |
Gamma |
|
2.57380e-01 |
3.245e-02 |
Gamma |
|
2.68850e-01 |
1.122e-01 |
Gamma |
|
3.15930e-01 |
2.021e-01 |
Gamma |
|
3.62550e-01 |
3.948e-01 |
Gamma |
|
4.09720e-01 |
2.143e-01 |
Gamma |
|
4.53590e-01 |
6.760e-01 |
Gamma |
|
1.09267e-05 |
1.912e+00 |
Auger electron |
|
2.44622e-05 |
2.705e+00 |
Auger electron |
|
1.59568e-04 |
7.574e+00 |
Auger electron |
|
2.85761e-04 |
2.410e-01 |
Auger electron |
|
3.03256e-04 |
1.296e+00 |
Auger electron |
|
5.27583e-04 |
5.252e-01 |
Auger electron |
|
1.36244e-03 |
3.271e+00 |
Auger electron |
|
1.54088e-03 |
1.721e-01 |
Auger electron |
|
1.76480e-03 |
1.069e-02 |
Auger electron |
|
6.13714e-03 |
1.015e+00 |
Auger electron |
|
7.75895e-03 |
3.762e-01 |
Auger electron |
|
9.41233e-03 |
3.523e-02 |
Auger electron |
|
9.78500e-03 |
4.304e-01 |
Conversion electron |
|
1.02670e-02 |
2.275e-02 |
Conversion electron |
|
1.14717e-02 |
2.483e-01 |
Conversion electron |
|
1.89310e-02 |
1.844e-01 |
Conversion electron |
|
2.10300e-02 |
5.324e-02 |
Conversion electron |
|
4.45280e-02 |
3.636e-02 |
Auger electron |
|
5.31026e-02 |
1.882e-02 |
Auger electron |
|
5.72180e-02 |
5.082e-01 |
Conversion electron |
|
8.06680e-02 |
2.886e-01 |
Conversion electron |
|
1.04298e-01 |
1.393e-01 |
Conversion electron |
|
1.11455e-01 |
7.162e-02 |
Conversion electron |
|
1.11937e-01 |
1.345e-02 |
Conversion electron |
|
1.20601e-01 |
2.118e-02 |
Conversion electron |
|
1.27178e-01 |
1.114e-01 |
Conversion electron |
|
1.34905e-01 |
4.052e-02 |
Conversion electron |
|
1.44051e-01 |
1.287e-02 |
Conversion electron |
|
1.51558e-01 |
3.223e-02 |
Conversion electron |
|
1.58535e-01 |
1.956e-02 |
Conversion electron |
|
1.70998e-01 |
5.442e-02 |
Conversion electron |
|
1.81415e-01 |
1.562e-02 |
Conversion electron |
|
2.97068e-01 |
1.322e-02 |
Conversion electron |
|
3.88108e-01 |
1.287e-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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