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Radionuclide Dosimetric Data Sheets

Antimony-126

Summary data

General

Classification

Isotope:  Sb-126
Atomic number (Z):  51
Mass number (A):  126
Neutron number (N):  75

Radioactive decay

Decay modes:  β-
Half-life:  12.35 [d]
Decay constant:  6.4960e-07 [1/s]
Daughters:  Te-126 (100.0%)
Radioactive daughters:  None

Dosimetric constants

Mean alpha energy:  0.0 [MeV]
Mean electron energy:  0.35449 [MeV]
Mean photon energy:  2.75524 [MeV]
Air kerma rate constant, Γ10:  1.028e-16 [Gy·m2/Bq·s]
Air kerma coefficient, Kair:  1.028e-16 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or electrons), Δwp:  5.680e-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-:  5.680e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp:  4.414e-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-126 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-126 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-126 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-126 Summary Spectrum.csv

 

Energy [MeV]

Yield [#/nt] if > 0.01

Radiation type

1.36106e-05

3.750e-01

X-ray

2.74652e-02

1.163e-02

X-ray

2.23900e-01

1.394e-02

Gamma

2.78200e-01

2.390e-02

Gamma

2.96500e-01

4.482e-02

Gamma

4.14700e-01

8.327e-01

Gamma

5.56300e-01

1.693e-02

Gamma

5.73900e-01

6.673e-02

Gamma

5.93200e-01

7.470e-02

Gamma

6.56300e-01

2.191e-02

Gamma

6.66500e-01

9.960e-01

Gamma

6.74800e-01

3.685e-02

Gamma

6.95000e-01

9.960e-01

Gamma

6.97000e-01

2.888e-01

Gamma

7.20700e-01

5.378e-01

Gamma

8.56800e-01

1.763e-01

Gamma

9.53700e-01

1.195e-02

Gamma

9.89600e-01

6.773e-02

Gamma

1.21330e+00

2.390e-02

Gamma

6.17047e-02

2.004e-02

Beta

1.46227e-01

2.781e-01

Beta

1.54114e-01

5.657e-02

Beta

1.90592e-01

8.054e-02

Beta

2.21086e-01

4.027e-02

Beta

2.90255e-01

7.767e-02

Beta

3.08607e-01

4.698e-02

Beta

4.19426e-01

1.534e-01

Beta

5.65663e-01

2.877e-02

Beta

7.35362e-01

1.918e-01

Beta

2.29203e-05

1.832e-01

Auger electron

2.49381e-05

6.100e-02

Auger electron

1.21290e-04

2.097e-02

Auger electron

4.49271e-04

4.740e-02

Auger electron

3.08194e-03

1.863e-02

Auger 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

 

 

 

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