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Radionuclide Dosimetric Data Sheets
Antimony-128
Summary data
General
Classification
Isotope: Sb-128
Atomic number (Z): 51
Mass number (A): 128
Neutron number (N): 77
Radioactive decay
Decay modes: β-
Half-life: 9.01 [h]
Decay constant: 2.1370e-05 [1/s]
Daughters: Te-128 (100.0%)
Radioactive daughters: None
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.49992 [MeV]
Mean photon energy: 3.09344 [MeV]
Air kerma rate constant, Γ10: 1.145e-16 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 1.145e-16 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 8.010e-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-:
8.010e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 4.956e-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/Sb-128 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/Sb-128 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/Sb-128 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/Sb-128 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.36106e-05 |
5.591e-01 |
X-ray |
|
2.74652e-02 |
1.736e-02 |
X-ray |
|
2.04400e-01 |
1.000e-02 |
Gamma |
|
2.14800e-01 |
1.000e-02 |
Gamma |
|
2.27300e-01 |
1.500e-02 |
Gamma |
|
3.14100e-01 |
6.100e-01 |
Gamma |
|
3.17700e-01 |
3.000e-02 |
Gamma |
|
3.22300e-01 |
3.000e-02 |
Gamma |
|
3.57000e-01 |
1.500e-02 |
Gamma |
|
3.66100e-01 |
1.500e-02 |
Gamma |
|
4.04300e-01 |
1.000e-02 |
Gamma |
|
4.45700e-01 |
1.500e-02 |
Gamma |
|
4.54500e-01 |
1.500e-02 |
Gamma |
|
4.59500e-01 |
1.500e-02 |
Gamma |
|
5.26500e-01 |
4.500e-01 |
Gamma |
|
5.82900e-01 |
1.000e-02 |
Gamma |
|
5.94300e-01 |
1.000e-02 |
Gamma |
|
6.03000e-01 |
1.700e-02 |
Gamma |
|
6.28700e-01 |
3.100e-01 |
Gamma |
|
6.36200e-01 |
3.600e-01 |
Gamma |
|
6.54200e-01 |
1.700e-01 |
Gamma |
|
6.67100e-01 |
2.500e-02 |
Gamma |
|
6.83900e-01 |
3.000e-02 |
Gamma |
|
6.92900e-01 |
2.000e-02 |
Gamma |
|
7.27600e-01 |
4.000e-02 |
Gamma |
|
7.43300e-01 |
1.000e+00 |
Gamma |
|
7.54000e-01 |
1.000e+00 |
Gamma |
|
7.73700e-01 |
1.500e-02 |
Gamma |
|
8.02700e-01 |
1.200e-02 |
Gamma |
|
8.13600e-01 |
1.300e-01 |
Gamma |
|
8.35800e-01 |
1.000e-02 |
Gamma |
|
8.45800e-01 |
2.500e-02 |
Gamma |
|
8.78000e-01 |
3.500e-02 |
Gamma |
|
9.08800e-01 |
1.000e-02 |
Gamma |
|
9.72300e-01 |
1.000e-02 |
Gamma |
|
1.04750e+00 |
3.500e-02 |
Gamma |
|
1.07860e+00 |
2.000e-02 |
Gamma |
|
1.11270e+00 |
2.000e-02 |
Gamma |
|
1.15820e+00 |
1.500e-02 |
Gamma |
|
1.18160e+00 |
4.500e-02 |
Gamma |
|
1.25050e+00 |
1.000e-02 |
Gamma |
|
1.25950e+00 |
1.000e-02 |
Gamma |
|
1.33980e+00 |
1.000e-02 |
Gamma |
|
1.37800e+00 |
1.800e-02 |
Gamma |
|
2.08297e-01 |
6.263e-02 |
Beta |
|
2.60776e-01 |
4.415e-02 |
Beta |
|
2.64437e-01 |
2.053e-02 |
Beta |
|
2.91517e-01 |
4.620e-02 |
Beta |
|
3.03267e-01 |
5.647e-02 |
Beta |
|
3.27741e-01 |
4.107e-02 |
Beta |
|
3.32929e-01 |
1.571e-01 |
Beta |
|
4.47839e-01 |
1.232e-02 |
Beta |
|
4.53673e-01 |
1.335e-01 |
Beta |
|
4.61621e-01 |
4.312e-02 |
Beta |
|
5.69394e-01 |
3.593e-02 |
Beta |
|
5.87594e-01 |
1.540e-02 |
Beta |
|
6.11873e-01 |
7.187e-02 |
Beta |
|
6.23252e-01 |
1.335e-02 |
Beta |
|
6.44114e-01 |
3.593e-02 |
Beta |
|
6.89260e-01 |
1.540e-02 |
Beta |
|
8.01816e-01 |
1.951e-01 |
Beta |
|
2.29204e-05 |
2.732e-01 |
Auger electron |
|
2.49376e-05 |
9.095e-02 |
Auger electron |
|
1.21279e-04 |
3.127e-02 |
Auger electron |
|
4.49281e-04 |
7.065e-02 |
Auger electron |
|
3.08210e-03 |
2.777e-02 |
Auger electron |
|
2.82295e-01 |
1.695e-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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