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Radionuclide Dosimetric Data Sheets
Tin-117m
Summary data
General
Classification
Isotope: Sn-117m
Atomic number (Z): 50
Mass number (A): 117
Neutron number (N): 67
Radioactive decay
Decay modes: Internal transition
Half-life: 13.76 [d]
Decay constant: 5.8303e-07 [1/s]
Daughters: Sn-117 (100.0%)
Radioactive daughters: None
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.16158 [MeV]
Mean photon energy: 0.1581 [MeV]
Air kerma rate constant, Γ10: 9.965e-18 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 9.965e-18 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 2.589e-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-:
2.589e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 2.533e-14
[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-117m 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-117m 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-117m Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.08546e-05 |
1.535e+01 |
X-ray |
|
3.43219e-03 |
3.419e-02 |
X-ray |
|
3.65722e-03 |
1.791e-02 |
X-ray |
|
2.50232e-02 |
1.941e-01 |
X-ray |
|
2.52572e-02 |
3.631e-01 |
X-ray |
|
2.84307e-02 |
3.276e-02 |
X-ray |
|
2.84736e-02 |
6.360e-02 |
X-ray |
|
2.90882e-02 |
1.311e-02 |
X-ray |
|
1.56020e-01 |
2.113e-02 |
Gamma |
|
1.58560e-01 |
8.640e-01 |
Gamma |
|
1.13307e-05 |
7.589e+00 |
Auger electron |
|
3.03413e-05 |
2.619e+00 |
Auger electron |
|
1.23509e-04 |
8.491e-01 |
Auger electron |
|
2.78980e-04 |
1.551e-01 |
Auger electron |
|
3.96464e-04 |
1.892e+00 |
Auger electron |
|
4.70796e-04 |
4.317e-02 |
Auger electron |
|
2.84814e-03 |
7.438e-01 |
Auger electron |
|
3.36534e-03 |
1.917e-01 |
Auger electron |
|
3.90208e-03 |
1.272e-02 |
Auger electron |
|
2.09334e-02 |
7.316e-02 |
Auger electron |
|
2.44171e-02 |
3.116e-02 |
Auger electron |
|
1.26836e-01 |
6.631e-01 |
Conversion electron |
|
1.29376e-01 |
1.188e-01 |
Conversion electron |
|
1.51580e-01 |
1.370e-01 |
Conversion electron |
|
1.51859e-01 |
3.070e-02 |
Conversion electron |
|
1.52093e-01 |
1.064e-01 |
Conversion electron |
|
1.54120e-01 |
1.395e-02 |
Conversion electron |
|
1.55310e-01 |
6.014e-02 |
Conversion electron |
|
1.56020e-01 |
1.267e-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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