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Radionuclide Dosimetric Data Sheets

Samarium-153

Isotope:  Sm-153
Atomic number (Z):  62
Mass number (A):  153
Neutron number (N):  91

Decay modes:  β-
Half-life:  46.5 [h]
Decay constant:  4.1407e-06 [1/s]
Daughters:  Eu-153 (100.0%)
Radioactive daughters:  None

Mean alpha energy:  0.0 [MeV]
Mean electron energy:  0.26987 [MeV]
Mean photon energy:  0.06425 [MeV]
Air kerma rate constant, Γ₁₀:  3.119e-18 [Gy·m²/Bq·s]
Air kerma coefficient, K_air:  3.119e-18 [Gy·m²/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or electrons), Δ_wp:  4.324e-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-:  4.324e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δ_p:  1.029e-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/Sm-153 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/Sm-153 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/Sm-153 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/Sm-153 Summary Spectrum.csv

 

Energy [MeV]	Yield [#/nt] if > 0.01	Radiation type
1.42261e-05	7.554e+00	X-ray
1.02916e-03	1.009e-02	X-ray
5.83100e-03	4.860e-02	X-ray
6.45760e-03	3.156e-02	X-ray
4.09430e-02	1.787e-01	X-ray
4.15992e-02	3.223e-01	X-ray
4.69640e-02	3.253e-02	X-ray
4.70984e-02	6.294e-02	X-ray
4.83077e-02	1.375e-02	X-ray
6.96730e-02	4.845e-02	Gamma
1.03180e-01	2.980e-01	Gamma
1.99685e-01	3.221e-01	Beta
2.25414e-01	4.962e-01	Beta
2.64477e-01	1.751e-01	Beta
1.58398e-05	5.346e-01	Auger electron
1.04983e-04	3.663e-01	Auger electron
1.13032e-04	3.257e+00	Auger electron
1.79313e-04	5.155e-01	Auger electron
5.40110e-04	9.927e-02	Auger electron
8.53821e-04	1.117e+00	Auger electron
1.02586e-03	6.880e-02	Auger electron
4.61679e-03	4.124e-01	Auger electron
5.71770e-03	1.420e-01	Auger electron
6.85261e-03	1.225e-02	Auger electron
2.11050e-02	2.214e-01	Conversion electron
3.36229e-02	2.930e-02	Auger electron
3.97850e-02	1.438e-02	Auger electron
5.46121e-02	4.341e-01	Conversion electron
6.16549e-02	2.858e-02	Conversion electron
9.51620e-02	5.684e-02	Conversion electron
1.01711e-01	1.421e-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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