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Radionuclide Dosimetric Data Sheets
Lanthanum-143
Summary data
General
Classification
Isotope: La-143
Atomic number (Z): 57
Mass number (A): 143
Neutron number (N): 86
Radioactive decay
Decay modes: β-
Half-life: 14.2 [m]
Decay constant: 8.1355e-04 [1/s]
Daughters: Ce-143 (100.0%)
Radioactive daughters: Ce-143
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 1.29946 [MeV]
Mean photon energy: 0.26306 [MeV]
Air kerma rate constant, Γ10: 8.645e-18 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 8.645e-18 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 2.082e-13 [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-:
2.082e-13 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 4.215e-14
[Gy·kg/Bq·s]
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/La-143 Summary Spectrum.csv
Beta spectra (plot)
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/La-143 Beta 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/La-143 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
6.20300e-01 |
2.340e-02 |
Gamma |
|
6.21400e-01 |
1.520e-02 |
Gamma |
|
6.43750e-01 |
1.550e-02 |
Gamma |
|
7.98140e-01 |
1.180e-02 |
Gamma |
|
1.14850e+00 |
1.160e-02 |
Gamma |
|
1.55643e+00 |
1.000e-02 |
Gamma |
|
1.96144e+00 |
1.010e-02 |
Gamma |
|
3.04871e-01 |
1.301e-02 |
Beta |
|
5.28564e-01 |
1.661e-02 |
Beta |
|
8.88183e-01 |
1.170e-02 |
Beta |
|
8.89359e-01 |
1.601e-02 |
Beta |
|
1.04764e+00 |
1.010e-02 |
Beta |
|
1.11831e+00 |
2.601e-02 |
Beta |
|
1.40461e+00 |
4.202e-01 |
Beta |
|
1.41545e+00 |
4.202e-01 |
Beta |
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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