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Radionuclide Dosimetric Data Sheets
Tantalum-179
Summary data
General
Classification
Isotope: Ta-179
Atomic number (Z): 73
Mass number (A): 179
Neutron number (N): 106
Radioactive decay
Decay modes: Electron capture
Half-life: 1.82 [y]
Decay constant: 1.2069e-08 [1/s]
Daughters: Hf-179 (100.0%)
Radioactive daughters: None
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.0078 [MeV]
Mean photon energy: 0.0256 [MeV]
Air kerma rate constant, Γ10: 1.758e-18 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 1.758e-18 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 1.250e-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-:
1.250e-15 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 4.102e-15
[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/Ta-179 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/Ta-179 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/Ta-179 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.92934e-05 |
9.439e+00 |
X-ray |
|
1.63880e-03 |
2.756e-02 |
X-ray |
|
7.88958e-03 |
8.602e-02 |
X-ray |
|
9.03750e-03 |
4.292e-02 |
X-ray |
|
9.14599e-03 |
1.246e-02 |
X-ray |
|
9.34357e-03 |
1.495e-02 |
X-ray |
|
5.47191e-02 |
1.196e-01 |
X-ray |
|
5.59237e-02 |
2.093e-01 |
X-ray |
|
6.31238e-02 |
2.228e-02 |
X-ray |
|
6.33831e-02 |
4.306e-02 |
X-ray |
|
1.09846e-05 |
8.410e-01 |
Auger electron |
|
2.44632e-05 |
1.182e+00 |
Auger electron |
|
1.59544e-04 |
3.275e+00 |
Auger electron |
|
2.90766e-04 |
1.076e-01 |
Auger electron |
|
3.07833e-04 |
5.897e-01 |
Auger electron |
|
5.07928e-04 |
3.190e-01 |
Auger electron |
|
1.36352e-03 |
1.384e+00 |
Auger electron |
|
1.54516e-03 |
7.292e-02 |
Auger electron |
|
6.20378e-03 |
4.074e-01 |
Auger electron |
|
7.83354e-03 |
1.515e-01 |
Auger electron |
|
9.49815e-03 |
1.422e-02 |
Auger electron |
|
4.45280e-02 |
1.327e-02 |
Auger 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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