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Radionuclide Dosimetric Data Sheets
Tin-119m
Summary data
General
Classification
Isotope: Sn-119m
Atomic number (Z): 50
Mass number (A): 119
Neutron number (N): 69
Radioactive decay
Decay modes: Internal transition
Half-life: 293.1 [d]
Decay constant: 2.7371e-08 [1/s]
Daughters: Sn-119 (100.0%)
Radioactive daughters: None
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.07808 [MeV]
Mean photon energy: 0.01509 [MeV]
Air kerma rate constant, Γ10: 4.886e-18 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 4.886e-18 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 1.251e-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-:
1.251e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 2.418e-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-119m 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-119m Summary 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-119m Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.08559e-05 |
2.447e+01 |
X-ray |
|
3.43218e-03 |
4.321e-02 |
X-ray |
|
3.65723e-03 |
1.920e-02 |
X-ray |
|
3.72998e-03 |
1.401e-02 |
X-ray |
|
2.38750e-02 |
1.604e-01 |
Gamma |
|
2.50232e-02 |
7.785e-02 |
X-ray |
|
2.52572e-02 |
1.457e-01 |
X-ray |
|
2.52710e-02 |
1.430e-01 |
Gamma |
|
2.84307e-02 |
1.314e-02 |
X-ray |
|
2.84736e-02 |
2.552e-02 |
X-ray |
|
1.13520e-05 |
1.209e+01 |
Auger electron |
|
3.01297e-05 |
4.332e+00 |
Auger electron |
|
1.20339e-04 |
1.448e+00 |
Auger electron |
|
3.16710e-04 |
4.609e-01 |
Auger electron |
|
3.99305e-04 |
2.804e+00 |
Auger electron |
|
4.81348e-04 |
6.561e-02 |
Auger electron |
|
2.89382e-03 |
1.090e+00 |
Auger electron |
|
3.41883e-03 |
2.836e-01 |
Auger electron |
|
3.96689e-03 |
1.904e-02 |
Auger electron |
|
1.94347e-02 |
6.115e-01 |
Conversion electron |
|
1.97142e-02 |
5.073e-02 |
Conversion electron |
|
1.99482e-02 |
1.417e-02 |
Conversion electron |
|
2.09334e-02 |
2.935e-02 |
Auger electron |
|
2.31647e-02 |
1.333e-01 |
Conversion electron |
|
2.38750e-02 |
2.997e-02 |
Conversion electron |
|
2.44171e-02 |
1.250e-02 |
Auger electron |
|
3.64760e-02 |
3.137e-01 |
Conversion electron |
|
6.12197e-02 |
1.541e-01 |
Conversion electron |
|
6.14992e-02 |
3.380e-02 |
Conversion electron |
|
6.17332e-02 |
3.438e-01 |
Conversion electron |
|
6.49497e-02 |
1.284e-01 |
Conversion electron |
|
6.56600e-02 |
2.600e-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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