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Radionuclide Dosimetric Data Sheets

Antimony-127

Isotope:  Sb-127
Atomic number (Z):  51
Mass number (A):  127
Neutron number (N):  76

Decay modes:  β-
Half-life:  3.85 [d]
Decay constant:  2.0838e-06 [1/s]
Daughters:  Te-127 (82.3%), Te-127m (17.7%)
Radioactive daughters:  Te-127, Te-127m

Mean alpha energy:  0.0 [MeV]
Mean electron energy:  0.316 [MeV]
Mean photon energy:  0.69335 [MeV]
Air kerma rate constant, Γ₁₀:  2.612e-17 [Gy·m²/Bq·s]
Air kerma coefficient, K_air:  2.612e-17 [Gy·m²/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or electrons), Δ_wp:  5.063e-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-:  5.063e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δ_p:  1.111e-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-127 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-127 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-127 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-127 Summary Spectrum.csv

 

Energy [MeV]	Yield [#/nt] if > 0.01	Radiation type
1.36106e-05	8.114e-01	X-ray
2.71868e-02	1.270e-02	X-ray
2.74652e-02	2.364e-02	X-ray
6.11000e-02	1.422e-02	Gamma
2.52400e-01	8.501e-02	Gamma
2.90800e-01	2.024e-02	Gamma
4.12100e-01	3.827e-02	Gamma
4.45100e-01	4.342e-02	Gamma
4.73000e-01	2.580e-01	Gamma
5.43300e-01	2.944e-02	Gamma
6.03500e-01	4.453e-02	Gamma
6.85700e-01	3.680e-01	Gamma
6.98500e-01	3.643e-02	Gamma
7.22200e-01	1.877e-02	Gamma
7.83700e-01	1.512e-01	Gamma
1.32552e-01	1.550e-02	Beta
1.54967e-01	5.401e-02	Beta
2.10843e-01	1.300e-02	Beta
2.64125e-01	4.500e-02	Beta
2.65065e-01	1.800e-01	Beta
3.03869e-01	3.580e-01	Beta
3.25635e-01	4.600e-02	Beta
3.90699e-01	2.340e-01	Beta
4.46526e-01	1.700e-02	Beta
5.61858e-01	2.000e-02	Beta
2.29198e-05	3.965e-01	Auger electron
2.49429e-05	1.319e-01	Auger electron
1.21388e-04	4.537e-02	Auger electron
4.49244e-04	1.027e-01	Auger electron
3.08154e-03	4.030e-02	Auger electron
3.67501e-03	1.141e-02	Auger electron
2.92950e-02	3.848e-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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