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Radionuclide Dosimetric Data Sheets
Tantalum-184
Summary data
General
Classification
Isotope: Ta-184
Atomic number (Z): 73
Mass number (A): 184
Neutron number (N): 111
Radioactive decay
Decay modes: β-
Half-life: 8.7 [h]
Decay constant: 2.2131e-05 [1/s]
Daughters: W-184 (100.0%)
Radioactive daughters: None
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.54255 [MeV]
Mean photon energy: 1.57267 [MeV]
Air kerma rate constant, Γ10: 5.843e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 5.843e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 8.693e-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-:
8.693e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 2.520e-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-184 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-184 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-184 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-184 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
3.13061e-05 |
1.067e+01 |
X-ray |
|
1.77836e-03 |
3.939e-02 |
X-ray |
|
8.32492e-03 |
1.371e-02 |
X-ray |
|
8.38982e-03 |
1.210e-01 |
X-ray |
|
9.69189e-03 |
1.150e-01 |
X-ray |
|
9.95867e-03 |
2.146e-02 |
X-ray |
|
1.13129e-02 |
2.140e-02 |
X-ray |
|
5.81161e-02 |
1.063e-01 |
X-ray |
|
5.94830e-02 |
1.845e-01 |
X-ray |
|
6.37000e-02 |
1.710e-02 |
Gamma |
|
6.71212e-02 |
1.984e-02 |
X-ray |
|
6.74178e-02 |
3.835e-02 |
X-ray |
|
9.12700e-02 |
1.033e-02 |
Gamma |
|
1.11192e-01 |
2.369e-01 |
Gamma |
|
1.61270e-01 |
3.168e-02 |
Gamma |
|
1.62000e-01 |
1.656e-02 |
Gamma |
|
2.15340e-01 |
1.138e-01 |
Gamma |
|
2.16540e-01 |
1.728e-02 |
Gamma |
|
2.26740e-01 |
6.624e-02 |
Gamma |
|
2.44440e-01 |
3.528e-02 |
Gamma |
|
2.52850e-01 |
4.320e-01 |
Gamma |
|
2.53000e-01 |
4.896e-02 |
Gamma |
|
3.18040e-01 |
2.282e-01 |
Gamma |
|
3.84280e-01 |
1.246e-01 |
Gamma |
|
4.14010e-01 |
7.200e-01 |
Gamma |
|
4.61060e-01 |
1.066e-01 |
Gamma |
|
5.36710e-01 |
1.274e-01 |
Gamma |
|
6.41990e-01 |
1.404e-02 |
Gamma |
|
7.92070e-01 |
1.454e-01 |
Gamma |
|
8.94770e-01 |
1.066e-01 |
Gamma |
|
9.03290e-01 |
1.498e-01 |
Gamma |
|
9.20930e-01 |
3.197e-01 |
Gamma |
|
1.11012e+00 |
2.232e-02 |
Gamma |
|
1.17377e+00 |
4.752e-02 |
Gamma |
|
3.80418e-01 |
1.473e-01 |
Beta |
|
3.99165e-01 |
8.233e-01 |
Beta |
|
2.53339e-05 |
2.111e+00 |
Auger electron |
|
1.61609e-04 |
3.637e+00 |
Auger electron |
|
3.13858e-04 |
1.261e-01 |
Auger electron |
|
3.19661e-04 |
7.132e-01 |
Auger electron |
|
8.31802e-04 |
1.120e-01 |
Auger electron |
|
1.47503e-03 |
1.679e+00 |
Auger electron |
|
1.66246e-03 |
1.084e-01 |
Auger electron |
|
6.57648e-03 |
5.343e-01 |
Auger electron |
|
8.33420e-03 |
2.053e-01 |
Auger electron |
|
1.01209e-02 |
1.964e-02 |
Auger electron |
|
2.15810e-02 |
4.248e-02 |
Conversion electron |
|
4.15030e-02 |
1.697e-01 |
Conversion electron |
|
4.32530e-02 |
1.339e-02 |
Conversion electron |
|
4.71853e-02 |
1.115e-02 |
Auger electron |
|
5.21270e-02 |
1.667e-01 |
Conversion electron |
|
5.34940e-02 |
1.699e-01 |
Conversion electron |
|
6.14288e-02 |
8.646e-02 |
Conversion electron |
|
6.37000e-02 |
2.390e-02 |
Conversion electron |
|
9.15810e-02 |
2.809e-02 |
Conversion electron |
|
9.91150e-02 |
1.823e-02 |
Conversion electron |
|
9.96190e-02 |
1.717e-01 |
Conversion electron |
|
1.00986e-01 |
1.487e-01 |
Conversion electron |
|
1.08921e-01 |
8.595e-02 |
Conversion electron |
|
1.11192e-01 |
2.392e-02 |
Conversion electron |
|
1.83161e-01 |
3.890e-02 |
Conversion electron |
|
3.44321e-01 |
5.801e-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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