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Radionuclide Dosimetric Data Sheets

Tin-126

Summary data

General

Classification

Isotope:  Sn-126
Atomic number (Z):  50
Mass number (A):  126
Neutron number (N):  76

Radioactive decay

Decay modes:  β-
Half-life:  230000.0 [y]
Decay constant:  9.5500e-14 [1/s]
Daughters:  Sb-126m (100.0%)
Radioactive daughters:  Sb-126m

Dosimetric constants

Mean alpha energy:  0.0 [MeV]
Mean electron energy:  0.13802 [MeV]
Mean photon energy:  0.05685 [MeV]
Air kerma rate constant, Γ10:  4.386e-18 [Gy·m2/Bq·s]
Air kerma coefficient, Kair:  4.386e-18 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or electrons), Δwp:  2.211e-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-:  2.211e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp:  9.108e-15 [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/Sn-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/Sn-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/Sn-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/Sn-126 Summary Spectrum.csv

 

Energy [MeV]

Yield [#/nt] if > 0.01

Radiation type

1.22347e-05

2.132e+01

X-ray

3.59265e-03

3.828e-02

X-ray

3.83821e-03

2.050e-02

X-ray

3.91201e-03

1.392e-02

X-ray

2.16460e-02

1.258e-02

Gamma

2.32800e-02

6.401e-02

Gamma

2.60930e-02

8.407e-02

X-ray

2.63486e-02

1.569e-01

X-ray

2.96698e-02

1.430e-02

X-ray

2.97173e-02

2.775e-02

X-ray

6.42810e-02

9.620e-02

Gamma

8.69380e-02

8.917e-02

Gamma

8.75670e-02

3.700e-01

Gamma

8.39985e-02

1.000e+00

Beta

1.69341e-05

1.048e+01

Auger electron

2.71493e-05

3.701e+00

Auger electron

1.18525e-04

1.287e+00

Auger electron

3.26995e-04

4.398e-01

Auger electron

4.25971e-04

2.439e+00

Auger electron

5.16110e-04

7.565e-02

Auger electron

3.02341e-03

9.492e-01

Auger electron

3.58719e-03

2.594e-01

Auger electron

4.17638e-03

1.809e-02

Auger electron

1.21620e-02

3.201e-02

Conversion electron

1.80263e-02

3.843e-01

Conversion electron

1.83140e-02

3.156e-02

Conversion electron

1.85695e-02

1.727e-01

Conversion electron

1.86063e-02

2.916e-01

Conversion electron

1.88940e-02

2.417e-02

Conversion electron

2.17904e-02

2.931e-02

Auger electron

2.19383e-02

1.279e-01

Conversion electron

2.25183e-02

6.425e-02

Conversion electron

2.27000e-02

2.911e-02

Conversion electron

2.32800e-02

1.488e-02

Conversion electron

2.54497e-02

1.270e-02

Auger electron

3.38020e-02

5.382e-02

Conversion electron

5.64590e-02

1.621e-01

Conversion electron

5.70880e-02

8.774e-02

Conversion electron

8.22643e-02

1.449e-02

Conversion electron

8.25520e-02

2.250e-02

Conversion electron

8.28075e-02

2.758e-02

Conversion electron

8.61763e-02

1.342e-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

 

 

 

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