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Radionuclide Dosimetric Data Sheets

Antimony-118m

Isotope:  Sb-118m
Atomic number (Z):  51
Mass number (A):  118
Neutron number (N):  67

Decay modes:  β+, Electron capture
Half-life:  5.0 [h]
Decay constant:  3.8508e-05 [1/s]
Daughters:  Sn-118 (100.0%)
Radioactive daughters:  None

Mean alpha energy:  0.0 [MeV]
Mean electron energy:  0.03737 [MeV]
Mean photon energy:  2.61302 [MeV]
Air kerma rate constant, Γ₁₀:  1.006e-16 [Gy·m²/Bq·s]
Air kerma coefficient, K_air:  1.007e-16 [Gy·m²/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or electrons), Δ_wp:  5.987e-15 [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-:  5.987e-15 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δ_p:  4.187e-13 [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/Sb-118m 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/Sb-118m 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/Sb-118m 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/Sb-118m Summary Spectrum.csv

 

Energy [MeV]	Yield [#/nt] if > 0.01	Radiation type
1.08542e-05	2.351e+01	X-ray
3.43219e-03	5.265e-02	X-ray
3.65722e-03	2.994e-02	X-ray
2.50232e-02	3.653e-01	X-ray
2.52572e-02	6.835e-01	X-ray
2.84307e-02	6.166e-02	X-ray
2.84736e-02	1.197e-01	X-ray
2.90803e-02	1.264e-02	X-ray
2.90882e-02	2.468e-02	X-ray
4.08000e-02	3.040e-01	Gamma
2.53678e-01	9.890e-01	Gamma
9.84000e-01	1.499e-02	Gamma
1.05069e+00	9.690e-01	Gamma
1.09151e+00	3.596e-02	Gamma
1.22965e+00	9.990e-01	Gamma
1.13299e-05	1.162e+01	Auger electron
3.03737e-05	3.993e+00	Auger electron
1.24052e-04	1.287e+00	Auger electron
2.68625e-04	2.205e-01	Auger electron
3.96158e-04	2.920e+00	Auger electron
4.69648e-04	6.645e-02	Auger electron
2.84637e-03	1.153e+00	Auger electron
3.36287e-03	2.970e-01	Auger electron
3.89858e-03	1.969e-02	Auger electron
1.16160e-02	5.639e-01	Conversion electron
2.09334e-02	1.377e-01	Auger electron
2.44171e-02	5.866e-02	Auger electron
3.63597e-02	5.068e-02	Conversion electron
3.66392e-02	1.222e-02	Conversion electron
3.68732e-02	1.885e-02	Conversion electron
4.00897e-02	1.598e-02	Conversion electron
2.24494e-01	5.099e-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

 

 

 

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