<= Return to MIRDspec isotope database

Radionuclide Dosimetric Data Sheets

Tin-128

Isotope:  Sn-128
Atomic number (Z):  50
Mass number (A):  128
Neutron number (N):  78

Decay modes:  β-
Half-life:  59.07 [m]
Decay constant:  1.9557e-04 [1/s]
Daughters:  Sb-128m (100.0%)
Radioactive daughters:  Sb-128m

Mean alpha energy:  0.0 [MeV]
Mean electron energy:  0.24571 [MeV]
Mean photon energy:  0.60406 [MeV]
Air kerma rate constant, Γ₁₀:  3.192e-17 [Gy·m²/Bq·s]
Air kerma coefficient, K_air:  3.192e-17 [Gy·m²/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or electrons), Δ_wp:  3.937e-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-:  3.937e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δ_p:  9.678e-14 [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/Sn-128 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/Sn-128 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/Sn-128 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/Sn-128 Summary Spectrum.csv

 

Energy [MeV]	Yield [#/nt] if > 0.01	Radiation type
1.22326e-05	2.505e+01	X-ray
3.59266e-03	6.079e-02	X-ray
3.83820e-03	3.517e-02	X-ray
2.60930e-02	4.066e-01	X-ray
2.63486e-02	7.588e-01	X-ray
2.96698e-02	6.918e-02	X-ray
2.97173e-02	1.342e-01	X-ray
3.03620e-02	1.425e-02	X-ray
3.03709e-02	2.791e-02	X-ray
3.21000e-02	4.012e-02	Gamma
4.57000e-02	1.298e-01	Gamma
7.51000e-02	2.773e-01	Gamma
1.52700e-01	6.490e-02	Gamma
4.04400e-01	5.900e-02	Gamma
4.36700e-01	4.130e-02	Gamma
4.82300e-01	5.900e-01	Gamma
5.57300e-01	1.652e-01	Gamma
6.80500e-01	1.593e-01	Gamma
1.29581e-01	1.608e-01	Beta
2.00781e-01	8.392e-01	Beta
1.68952e-05	1.233e+01	Auger electron
2.73677e-05	4.155e+00	Auger electron
1.22162e-04	1.390e+00	Auger electron
2.81134e-04	2.480e-01	Auger electron
4.22450e-04	3.129e+00	Auger electron
5.04607e-04	9.467e-02	Auger electron
1.62100e-03	5.747e-01	Conversion electron
2.96451e-03	1.233e+00	Auger electron
3.51916e-03	3.336e-01	Auger electron
4.09436e-03	2.292e-02	Auger electron
1.52210e-02	6.788e-01	Conversion electron
2.17904e-02	1.418e-01	Auger electron
2.54497e-02	6.141e-02	Auger electron
2.74263e-02	7.075e-02	Conversion electron
3.13383e-02	1.546e-02	Conversion electron
4.10263e-02	8.084e-02	Conversion electron
4.46210e-02	3.417e-01	Conversion electron
4.49383e-02	1.767e-02	Conversion electron
7.04263e-02	4.079e-02	Conversion electron
1.22221e-01	1.567e-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

 

 

 

MIRDsoft MIRDspecs version 20250101 (www.mirdsoft.org)

<= Return to MIRDspec isotope database