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Radionuclide Dosimetric Data Sheets

Tin-127

Summary data

General

Classification

Isotope:  Sn-127
Atomic number (Z):  50
Mass number (A):  127
Neutron number (N):  77

Radioactive decay

Decay modes:  β-
Half-life:  2.1 [h]
Decay constant:  9.1686e-05 [1/s]
Daughters:  Sb-127 (100.0%)
Radioactive daughters:  Sb-127

Dosimetric constants

Mean alpha energy:  0.0 [MeV]
Mean electron energy:  0.5199 [MeV]
Mean photon energy:  1.90751 [MeV]
Air kerma rate constant, Γ10:  6.592e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair:  6.592e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or electrons), Δwp:  8.330e-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-:  8.330e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp:  3.056e-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/Sn-127 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-127 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-127 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-127 Summary Spectrum.csv

 

Energy [MeV]

Yield [#/nt] if > 0.01

Radiation type

1.22324e-05

1.057e+00

X-ray

2.60930e-02

1.591e-02

X-ray

2.63486e-02

2.969e-02

X-ray

1.19700e-01

2.212e-02

Gamma

1.69200e-01

2.056e-02

Gamma

1.84700e-01

1.125e-02

Gamma

2.62500e-01

2.367e-02

Gamma

2.66200e-01

2.173e-02

Gamma

2.84300e-01

2.716e-02

Gamma

2.92900e-01

1.280e-02

Gamma

3.90500e-01

1.280e-02

Gamma

4.07100e-01

1.552e-02

Gamma

4.38200e-01

6.208e-02

Gamma

4.90900e-01

5.432e-02

Gamma

4.93200e-01

3.182e-02

Gamma

5.00700e-01

1.552e-02

Gamma

5.09000e-01

1.474e-02

Gamma

5.45400e-01

2.328e-02

Gamma

5.83300e-01

3.259e-02

Gamma

5.92300e-01

2.056e-02

Gamma

8.05900e-01

8.420e-02

Gamma

8.23100e-01

1.086e-01

Gamma

8.24700e-01

6.208e-02

Gamma

8.59500e-01

8.148e-02

Gamma

9.16500e-01

1.203e-02

Gamma

9.79200e-01

7.372e-02

Gamma

9.97900e-01

1.979e-02

Gamma

1.00260e+00

1.785e-02

Gamma

1.03610e+00

2.018e-02

Gamma

1.09330e+00

3.880e-02

Gamma

1.09560e+00

1.979e-01

Gamma

1.11430e+00

3.880e-01

Gamma

1.16040e+00

2.444e-02

Gamma

1.47250e+00

1.280e-02

Gamma

1.58430e+00

1.824e-02

Gamma

1.64780e+00

1.048e-02

Gamma

2.00340e+00

5.432e-02

Gamma

2.31740e+00

1.125e-02

Gamma

2.58490e+00

1.591e-02

Gamma

2.69590e+00

1.668e-02

Gamma

9.68600e-02

1.135e-02

Beta

1.03776e-01

1.253e-02

Beta

1.17535e-01

1.370e-02

Beta

1.32277e-01

2.545e-02

Beta

1.55651e-01

1.762e-02

Beta

1.76292e-01

4.502e-02

Beta

1.79143e-01

1.028e-02

Beta

1.95336e-01

1.125e-01

Beta

2.16778e-01

4.306e-02

Beta

2.27803e-01

6.459e-02

Beta

2.45057e-01

4.404e-02

Beta

2.48340e-01

1.859e-02

Beta

2.64376e-01

1.664e-02

Beta

2.83236e-01

5.285e-02

Beta

3.16805e-01

2.740e-02

Beta

3.67584e-01

2.055e-02

Beta

3.84292e-01

1.566e-02

Beta

3.91326e-01

4.893e-02

Beta

4.29124e-01

2.545e-02

Beta

4.57164e-01

1.077e-02

Beta

4.64553e-01

2.642e-02

Beta

8.21595e-01

2.936e-02

Beta

1.32512e+00

2.153e-01

Beta

1.68935e-05

5.203e-01

Auger electron

2.73852e-05

1.749e-01

Auger electron

1.22463e-04

5.847e-02

Auger electron

4.22301e-04

1.326e-01

Auger electron

2.96216e-03

5.216e-02

Auger electron

3.51632e-03

1.411e-02

Auger electron

3.98210e-02

1.345e-02

Conversion electron

8.92210e-02

1.143e-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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