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Radionuclide Dosimetric Data Sheets

Tantalum-180

Isotope:  Ta-180
Atomic number (Z):  73
Mass number (A):  180
Neutron number (N):  107

Decay modes:  β-, Electron capture
Half-life:  8.152 [h]
Decay constant:  2.3619e-05 [1/s]
Daughters:  Hf-180 (86.0%), W-180 (14.0%)
Radioactive daughters:  None

Mean alpha energy:  0.0 [MeV]
Mean electron energy:  0.05651 [MeV]
Mean photon energy:  0.04824 [MeV]
Air kerma rate constant, Γ₁₀:  2.695e-18 [Gy·m²/Bq·s]
Air kerma coefficient, K_air:  2.695e-18 [Gy·m²/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or electrons), Δ_wp:  9.054e-15 [Gy·kg/Bq·s]
Equilibrium dose constant for alphas, Δ_α:  0.000e+00 [Gy·kg/Bq·s]
Equilibrium dose constant for betas/electrons, Δ_β-,β+,e-:  9.054e-15 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δ_p:  7.729e-15 [Gy·kg/Bq·s]

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-180 DPK.csv

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-180 Summary Spectrum.csv

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-180 Beta Spectrum.csv

 

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-180 Summary Spectrum.csv

 

Energy [MeV]	Yield [#/nt] if > 0.01	Radiation type
1.94068e-05	9.302e+00	X-ray
3.13168e-05	2.132e-01	X-ray
1.63782e-03	2.815e-02	X-ray
7.83282e-03	1.118e-02	X-ray
7.88959e-03	9.862e-02	X-ray
9.03750e-03	6.695e-02	X-ray
9.34358e-03	1.714e-02	X-ray
1.05374e-02	1.218e-02	X-ray
5.47191e-02	2.051e-01	X-ray
5.59237e-02	3.589e-01	X-ray
6.31238e-02	3.820e-02	X-ray
6.33831e-02	7.384e-02	X-ray
6.51063e-02	1.663e-02	X-ray
9.34000e-02	4.506e-02	Gamma
1.85759e-01	3.600e-02	Beta
2.22946e-01	1.040e-01	Beta
1.08202e-05	8.097e-01	Auger electron
2.44612e-05	1.149e+00	Auger electron
2.53244e-05	4.217e-02	Auger electron
1.59774e-04	3.238e+00	Auger electron
1.61677e-04	7.272e-02	Auger electron
2.83133e-04	1.021e-01	Auger electron
3.02271e-04	5.453e-01	Auger electron
3.20120e-04	1.429e-02	Auger electron
5.98731e-04	1.473e-01	Auger electron
1.36387e-03	1.412e+00	Auger electron
1.47583e-03	3.352e-02	Auger electron
1.54180e-03	7.429e-02	Auger electron
6.16203e-03	4.556e-01	Auger electron
6.59171e-03	1.072e-02	Auger electron
7.78195e-03	1.690e-01	Auger electron
9.43215e-03	1.581e-02	Auger electron
2.79180e-02	4.927e-02	Conversion electron
4.45280e-02	2.275e-02	Auger electron
5.31026e-02	1.178e-02	Auger electron
8.26370e-02	6.132e-02	Conversion electron
8.38417e-02	5.767e-02	Conversion electron
9.13010e-02	3.105e-02	Conversion electron

 

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

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

 

 

 

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