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Radionuclide Dosimetric Data Sheets
Samarium-145
Summary data
General
Classification
Isotope: Sm-145
Atomic number (Z): 62
Mass number (A): 145
Neutron number (N): 83
Radioactive decay
Decay modes: Electron capture
Half-life: 340.0 [d]
Decay constant: 2.3596e-08 [1/s]
Daughters: Pm-145 (100.0%)
Radioactive daughters: Pm-145
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.03072 [MeV]
Mean photon energy: 0.06424 [MeV]
Air kerma rate constant, Γ10: 5.244e-18 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 5.244e-18 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 4.922e-15 [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-:
4.922e-15 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 1.029e-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/Sm-145 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/Sm-145 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/Sm-145 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.48444e-05 |
1.825e+01 |
X-ray |
|
9.14590e-04 |
1.865e-02 |
X-ray |
|
5.39230e-03 |
1.107e-02 |
X-ray |
|
5.41729e-03 |
9.799e-02 |
X-ray |
|
5.95960e-03 |
6.145e-02 |
X-ray |
|
6.32131e-03 |
1.626e-02 |
X-ray |
|
6.88415e-03 |
1.048e-02 |
X-ray |
|
3.81996e-02 |
3.990e-01 |
X-ray |
|
3.87671e-02 |
7.240e-01 |
X-ray |
|
4.37575e-02 |
7.207e-02 |
X-ray |
|
4.38721e-02 |
1.395e-01 |
X-ray |
|
4.49540e-02 |
1.556e-02 |
X-ray |
|
4.49791e-02 |
3.022e-02 |
X-ray |
|
6.12200e-02 |
1.215e-01 |
Gamma |
|
1.43706e-05 |
1.595e+00 |
Auger electron |
|
3.62100e-05 |
1.278e-02 |
Auger electron |
|
8.53302e-05 |
1.487e+00 |
Auger electron |
|
1.00558e-04 |
7.298e+00 |
Auger electron |
|
1.59800e-04 |
1.177e+00 |
Auger electron |
|
4.76310e-04 |
2.363e-01 |
Auger electron |
|
7.56065e-04 |
2.537e+00 |
Auger electron |
|
9.22957e-04 |
1.685e-01 |
Auger electron |
|
4.30217e-03 |
9.541e-01 |
Auger electron |
|
5.30227e-03 |
3.236e-01 |
Auger electron |
|
6.33606e-03 |
2.726e-02 |
Auger electron |
|
1.60010e-02 |
6.764e-01 |
Conversion electron |
|
3.14373e-02 |
7.263e-02 |
Auger electron |
|
3.71303e-02 |
3.512e-02 |
Auger electron |
|
5.38259e-02 |
8.727e-02 |
Conversion electron |
|
5.98731e-02 |
2.094e-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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