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Radionuclide Dosimetric Data Sheets
Tantalum-175
Summary data
General
Classification
Isotope: Ta-175
Atomic number (Z): 73
Mass number (A): 175
Neutron number (N): 102
Radioactive decay
Decay modes: β+, Electron capture
Half-life: 10.5 [h]
Decay constant: 1.8337e-05 [1/s]
Daughters: Hf-175 (100.0%)
Radioactive daughters: Hf-175
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.06632 [MeV]
Mean photon energy: 1.11262 [MeV]
Air kerma rate constant, Γ10: 3.929e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 3.943e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 1.063e-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-:
1.063e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 1.783e-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/Ta-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/Ta-175 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/Ta-175 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/Ta-175 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.94031e-05 |
1.601e+01 |
X-ray |
|
1.63759e-03 |
4.842e-02 |
X-ray |
|
6.98230e-03 |
1.173e-02 |
X-ray |
|
7.83282e-03 |
1.941e-02 |
X-ray |
|
7.88959e-03 |
1.713e-01 |
X-ray |
|
9.03750e-03 |
1.097e-01 |
X-ray |
|
9.34358e-03 |
2.977e-02 |
X-ray |
|
1.05374e-02 |
1.996e-02 |
X-ray |
|
5.47191e-02 |
3.806e-01 |
X-ray |
|
5.59237e-02 |
6.659e-01 |
X-ray |
|
6.31238e-02 |
7.089e-02 |
X-ray |
|
6.33831e-02 |
1.370e-01 |
X-ray |
|
6.50467e-02 |
1.594e-02 |
X-ray |
|
6.51063e-02 |
3.086e-02 |
X-ray |
|
8.15000e-02 |
6.000e-02 |
Gamma |
|
1.04300e-01 |
3.120e-02 |
Gamma |
|
1.25900e-01 |
5.800e-02 |
Gamma |
|
1.25900e-01 |
2.600e-02 |
Gamma |
|
1.40900e-01 |
2.320e-02 |
Gamma |
|
1.62500e-01 |
1.480e-02 |
Gamma |
|
1.79100e-01 |
1.280e-02 |
Gamma |
|
2.07400e-01 |
1.400e-01 |
Gamma |
|
2.66900e-01 |
1.080e-01 |
Gamma |
|
2.88900e-01 |
1.480e-02 |
Gamma |
|
3.48500e-01 |
1.200e-01 |
Gamma |
|
3.93200e-01 |
2.120e-02 |
Gamma |
|
4.36400e-01 |
3.800e-02 |
Gamma |
|
4.75000e-01 |
2.040e-02 |
Gamma |
|
8.57700e-01 |
3.200e-02 |
Gamma |
|
9.62100e-01 |
1.440e-02 |
Gamma |
|
9.98300e-01 |
2.560e-02 |
Gamma |
|
1.14410e+00 |
1.120e-02 |
Gamma |
|
1.22560e+00 |
2.480e-02 |
Gamma |
|
1.24980e+00 |
2.400e-02 |
Gamma |
|
1.58600e+00 |
1.600e-02 |
Gamma |
|
1.61820e+00 |
1.320e-02 |
Gamma |
|
1.63600e+00 |
1.680e-02 |
Gamma |
|
1.65920e+00 |
1.080e-02 |
Gamma |
|
1.71180e+00 |
1.160e-02 |
Gamma |
|
1.72180e+00 |
1.160e-02 |
Gamma |
|
1.74480e+00 |
1.360e-02 |
Gamma |
|
1.79310e+00 |
4.600e-02 |
Gamma |
|
1.82610e+00 |
1.240e-02 |
Gamma |
|
1.08362e-05 |
1.394e+00 |
Auger electron |
|
2.44614e-05 |
1.977e+00 |
Auger electron |
|
1.59740e-04 |
5.571e+00 |
Auger electron |
|
2.83324e-04 |
1.756e-01 |
Auger electron |
|
3.02067e-04 |
9.361e-01 |
Auger electron |
|
5.84632e-04 |
2.710e-01 |
Auger electron |
|
1.36342e-03 |
2.430e+00 |
Auger electron |
|
1.54107e-03 |
1.277e-01 |
Auger electron |
|
5.01800e-03 |
1.845e-02 |
Conversion electron |
|
6.15572e-03 |
7.827e-01 |
Auger electron |
|
7.77568e-03 |
2.903e-01 |
Auger electron |
|
9.42601e-03 |
2.716e-02 |
Auger electron |
|
1.60180e-02 |
3.572e-01 |
Conversion electron |
|
3.88180e-02 |
9.248e-02 |
Conversion electron |
|
3.92550e-02 |
1.189e-02 |
Conversion electron |
|
3.97370e-02 |
1.152e-02 |
Conversion electron |
|
4.09417e-02 |
1.166e-02 |
Conversion electron |
|
4.45280e-02 |
4.220e-02 |
Auger electron |
|
5.31026e-02 |
2.185e-02 |
Auger electron |
|
6.04180e-02 |
1.478e-02 |
Conversion electron |
|
7.02550e-02 |
5.055e-02 |
Conversion electron |
|
7.07370e-02 |
1.426e-02 |
Conversion electron |
|
7.19417e-02 |
1.013e-02 |
Conversion electron |
|
7.94010e-02 |
1.745e-02 |
Conversion electron |
|
9.30550e-02 |
1.306e-02 |
Conversion electron |
|
9.70180e-02 |
1.171e-02 |
Conversion electron |
|
2.01418e-01 |
2.391e-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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