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Radionuclide Dosimetric Data Sheets
Hafnium-182
Summary data
General
Classification
Isotope: Hf-182
Atomic number (Z): 72
Mass number (A): 182
Neutron number (N): 110
Radioactive decay
Decay modes: β-
Half-life: 9000000.0 [y]
Decay constant: 2.4406e-15 [1/s]
Daughters: Ta-182 (100.0%)
Radioactive daughters: Ta-182
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.06324 [MeV]
Mean photon energy: 0.23972 [MeV]
Air kerma rate constant, Γ10: 8.779e-18 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 8.779e-18 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 1.013e-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-:
1.013e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 3.841e-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-182 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-182 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-182 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-182 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
2.50550e-05 |
1.878e+00 |
X-ray |
|
8.13762e-03 |
2.114e-02 |
X-ray |
|
9.36070e-03 |
1.590e-02 |
X-ray |
|
5.64020e-02 |
4.207e-02 |
X-ray |
|
5.76858e-02 |
7.331e-02 |
X-ray |
|
6.53809e-02 |
1.516e-02 |
X-ray |
|
1.14330e-01 |
2.600e-02 |
Gamma |
|
1.56090e-01 |
7.000e-02 |
Gamma |
|
2.70405e-01 |
8.000e-01 |
Gamma |
|
3.02294e-02 |
1.000e+00 |
Beta |
|
1.18813e-05 |
1.629e-01 |
Auger electron |
|
2.73571e-05 |
2.315e-01 |
Auger electron |
|
1.60588e-04 |
6.401e-01 |
Auger electron |
|
2.98184e-04 |
2.082e-02 |
Auger electron |
|
3.10228e-04 |
1.193e-01 |
Auger electron |
|
6.82294e-04 |
2.540e-02 |
Auger electron |
|
1.41871e-03 |
2.906e-01 |
Auger electron |
|
1.59974e-03 |
1.688e-02 |
Auger electron |
|
6.35151e-03 |
9.340e-02 |
Auger electron |
|
8.03869e-03 |
3.523e-02 |
Auger electron |
|
4.67650e-02 |
6.674e-02 |
Conversion electron |
|
8.85250e-02 |
2.286e-02 |
Conversion electron |
|
1.44927e-01 |
1.002e-02 |
Conversion electron |
|
2.02840e-01 |
5.943e-02 |
Conversion electron |
|
2.59242e-01 |
1.045e-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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