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Radionuclide Dosimetric Data Sheets
Tantalum-186
Summary data
General
Classification
Isotope: Ta-186
Atomic number (Z): 73
Mass number (A): 186
Neutron number (N): 113
Radioactive decay
Decay modes: β-
Half-life: 10.5 [m]
Decay constant: 1.1002e-03 [1/s]
Daughters: W-186 (100.0%)
Radioactive daughters: None
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 1.07104 [MeV]
Mean photon energy: 1.42016 [MeV]
Air kerma rate constant, Γ10: 5.241e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 5.241e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 1.716e-13 [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-:
1.716e-13 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 2.275e-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-186 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-186 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-186 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-186 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
3.13083e-05 |
4.968e+00 |
X-ray |
|
1.77803e-03 |
1.837e-02 |
X-ray |
|
8.38982e-03 |
5.735e-02 |
X-ray |
|
9.69189e-03 |
5.235e-02 |
X-ray |
|
9.95867e-03 |
1.017e-02 |
X-ray |
|
5.81161e-02 |
7.356e-02 |
X-ray |
|
5.94830e-02 |
1.277e-01 |
X-ray |
|
6.71212e-02 |
1.373e-02 |
X-ray |
|
6.74178e-02 |
2.654e-02 |
X-ray |
|
9.10000e-02 |
1.850e-02 |
Gamma |
|
9.27000e-02 |
1.400e-02 |
Gamma |
|
1.22300e-01 |
2.500e-01 |
Gamma |
|
1.83200e-01 |
3.000e-02 |
Gamma |
|
1.97900e-01 |
5.000e-01 |
Gamma |
|
2.14900e-01 |
4.250e-01 |
Gamma |
|
2.74200e-01 |
6.750e-02 |
Gamma |
|
2.77000e-01 |
1.250e-02 |
Gamma |
|
2.92500e-01 |
3.350e-02 |
Gamma |
|
3.07500e-01 |
9.650e-02 |
Gamma |
|
3.09200e-01 |
2.250e-02 |
Gamma |
|
3.15600e-01 |
1.500e-02 |
Gamma |
|
4.17700e-01 |
1.250e-01 |
Gamma |
|
4.57000e-01 |
2.150e-02 |
Gamma |
|
4.65000e-01 |
1.100e-02 |
Gamma |
|
5.10600e-01 |
3.750e-01 |
Gamma |
|
5.67200e-01 |
3.350e-02 |
Gamma |
|
5.83200e-01 |
1.100e-02 |
Gamma |
|
6.10500e-01 |
3.400e-02 |
Gamma |
|
6.15300e-01 |
2.800e-01 |
Gamma |
|
6.54900e-01 |
1.500e-02 |
Gamma |
|
6.58400e-01 |
1.250e-02 |
Gamma |
|
7.07000e-01 |
1.000e-02 |
Gamma |
|
7.09000e-01 |
1.000e-02 |
Gamma |
|
7.26000e-01 |
1.000e-02 |
Gamma |
|
7.37500e-01 |
2.900e-01 |
Gamma |
|
7.39200e-01 |
1.000e-01 |
Gamma |
|
7.40500e-01 |
4.500e-02 |
Gamma |
|
7.59400e-01 |
1.750e-02 |
Gamma |
|
7.83340e-01 |
2.800e-02 |
Gamma |
|
7.99800e-01 |
2.400e-02 |
Gamma |
|
8.30000e-01 |
1.500e-02 |
Gamma |
|
8.84100e-01 |
1.950e-02 |
Gamma |
|
9.23000e-01 |
1.150e-02 |
Gamma |
|
5.89342e-01 |
2.174e-02 |
Beta |
|
8.50485e-01 |
5.482e-01 |
Beta |
|
8.64738e-01 |
1.087e-02 |
Beta |
|
8.73938e-01 |
2.363e-02 |
Beta |
|
8.90452e-01 |
3.686e-02 |
Beta |
|
9.98772e-01 |
2.174e-02 |
Beta |
|
1.04005e+00 |
3.308e-02 |
Beta |
|
1.11127e+00 |
1.796e-02 |
Beta |
|
1.12107e+00 |
9.451e-02 |
Beta |
|
1.13455e+00 |
1.512e-02 |
Beta |
|
1.53222e+00 |
1.512e-01 |
Beta |
|
2.53385e-05 |
9.823e-01 |
Auger electron |
|
1.61576e-04 |
1.692e+00 |
Auger electron |
|
3.13689e-04 |
5.857e-02 |
Auger electron |
|
3.19093e-04 |
3.304e-01 |
Auger electron |
|
8.19314e-04 |
5.318e-02 |
Auger electron |
|
1.47449e-03 |
7.829e-01 |
Auger electron |
|
1.66141e-03 |
5.050e-02 |
Auger electron |
|
6.56720e-03 |
2.500e-01 |
Auger electron |
|
8.32445e-03 |
9.600e-02 |
Auger electron |
|
2.30110e-02 |
3.523e-02 |
Conversion electron |
|
5.26110e-02 |
1.462e-01 |
Conversion electron |
|
8.11270e-02 |
1.509e-02 |
Conversion electron |
|
8.24940e-02 |
1.361e-02 |
Conversion electron |
|
1.10223e-01 |
1.563e-02 |
Conversion electron |
|
1.10727e-01 |
1.173e-01 |
Conversion electron |
|
1.12094e-01 |
9.826e-02 |
Conversion electron |
|
1.20029e-01 |
5.861e-02 |
Conversion electron |
|
1.22300e-01 |
1.634e-02 |
Conversion electron |
|
1.28211e-01 |
2.676e-02 |
Conversion electron |
|
1.45211e-01 |
1.852e-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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