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Radionuclide Dosimetric Data Sheets

Antimony-129

Isotope:  Sb-129
Atomic number (Z):  51
Mass number (A):  129
Neutron number (N):  78

Decay modes:  β-
Half-life:  4.4 [h]
Decay constant:  4.3759e-05 [1/s]
Daughters:  Te-129 (77.4%), Te-129m (22.6%)
Radioactive daughters:  Te-129, Te-129m

Mean alpha energy:  0.0 [MeV]
Mean electron energy:  0.39525 [MeV]
Mean photon energy:  1.46008 [MeV]
Air kerma rate constant, Γ₁₀:  5.159e-17 [Gy·m²/Bq·s]
Air kerma coefficient, K_air:  5.159e-17 [Gy·m²/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or electrons), Δ_wp:  6.333e-14 [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-:  6.333e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δ_p:  2.339e-13 [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/Sb-129 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/Sb-129 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/Sb-129 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/Sb-129 Summary Spectrum.csv

 

Energy [MeV]	Yield [#/nt] if > 0.01	Radiation type
1.36107e-05	1.234e-01	X-ray
1.80800e-01	2.537e-02	Gamma
2.95500e-01	1.032e-02	Gamma
3.59400e-01	2.838e-02	Gamma
4.05000e-01	1.376e-02	Gamma
5.23800e-01	1.591e-02	Gamma
5.44700e-01	1.793e-01	Gamma
6.33700e-01	2.752e-02	Gamma
6.54300e-01	3.010e-02	Gamma
6.83600e-01	5.117e-02	Gamma
7.61000e-01	3.784e-02	Gamma
7.73400e-01	2.752e-02	Gamma
7.86600e-01	1.892e-02	Gamma
8.12800e-01	4.300e-01	Gamma
8.76200e-01	2.580e-02	Gamma
9.14600e-01	2.004e-01	Gamma
9.66400e-01	7.697e-02	Gamma
1.03010e+00	1.260e-01	Gamma
1.73650e+00	5.977e-02	Gamma
1.73650e+00	5.977e-02	Gamma
7.53409e-02	1.776e-02	Beta
8.89695e-02	1.875e-02	Beta
1.66857e-01	1.480e-01	Beta
2.00017e-01	3.256e-02	Beta
2.05959e-01	5.921e-02	Beta
2.09412e-01	2.447e-01	Beta
2.45370e-01	1.678e-02	Beta
3.71913e-01	3.750e-02	Beta
4.09162e-01	1.974e-02	Beta
5.20786e-01	2.960e-02	Beta
5.87851e-01	9.078e-02	Beta
6.11098e-01	4.046e-02	Beta
6.66997e-01	2.566e-02	Beta
7.06919e-01	6.710e-02	Beta
9.02004e-01	1.046e-01	Beta
2.29213e-05	6.030e-02	Auger electron
2.49321e-05	2.009e-02	Auger electron
4.49344e-04	1.557e-02	Auger 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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