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Radionuclide Dosimetric Data Sheets
Gadolinium-143m
Summary data
General
Classification
Isotope: Gd-143m
Atomic number (Z): 64
Mass number (A): 143
Neutron number (N): 79
Radioactive decay
Decay modes: β+, Electron capture
Half-life: 110.0 [s]
Decay constant: 6.3013e-03 [1/s]
Daughters: Eu-143 (100.0%)
Radioactive daughters: Eu-143
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 1.28541 [MeV]
Mean photon energy: 2.12108 [MeV]
Air kerma rate constant, Γ10: 5.024e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 7.721e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 2.059e-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-:
2.059e-13 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 3.398e-13
[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/Gd-143m 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/Gd-143m 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/Gd-143m 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/Gd-143m Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.42290e-05 |
1.002e+01 |
X-ray |
|
1.02966e-03 |
1.331e-02 |
X-ray |
|
5.83100e-03 |
6.345e-02 |
X-ray |
|
6.45760e-03 |
4.057e-02 |
X-ray |
|
6.82634e-03 |
1.063e-02 |
X-ray |
|
4.09430e-02 |
2.265e-01 |
X-ray |
|
4.15992e-02 |
4.085e-01 |
X-ray |
|
4.69640e-02 |
4.123e-02 |
X-ray |
|
4.70984e-02 |
7.977e-02 |
X-ray |
|
4.83077e-02 |
1.743e-02 |
X-ray |
|
1.17570e-01 |
6.491e-02 |
Gamma |
|
2.10900e-01 |
1.096e-02 |
Gamma |
|
2.71940e-01 |
8.430e-01 |
Gamma |
|
3.04200e-01 |
1.012e-02 |
Gamma |
|
3.89470e-01 |
3.456e-02 |
Gamma |
|
5.11000e-01 |
1.394e+00 |
Annihilation photon |
|
5.88000e-01 |
1.568e-01 |
Gamma |
|
6.25230e-01 |
1.180e-02 |
Gamma |
|
6.68100e-01 |
9.695e-02 |
Gamma |
|
7.85560e-01 |
5.480e-02 |
Gamma |
|
7.98890e-01 |
1.071e-01 |
Gamma |
|
8.24430e-01 |
4.974e-02 |
Gamma |
|
8.90520e-01 |
1.770e-02 |
Gamma |
|
9.06960e-01 |
2.107e-02 |
Gamma |
|
9.16530e-01 |
4.299e-02 |
Gamma |
|
9.84930e-01 |
2.023e-02 |
Gamma |
|
1.00828e+00 |
1.349e-02 |
Gamma |
|
1.04135e+00 |
3.035e-02 |
Gamma |
|
1.21921e+00 |
4.131e-02 |
Gamma |
|
1.37360e+00 |
1.096e-02 |
Gamma |
|
1.38669e+00 |
1.264e-02 |
Gamma |
|
1.40456e+00 |
2.866e-02 |
Gamma |
|
1.50340e+00 |
1.180e-02 |
Gamma |
|
1.62930e+00 |
1.939e-02 |
Gamma |
|
1.70250e+00 |
1.096e-02 |
Gamma |
|
1.79321e+00 |
2.613e-02 |
Gamma |
|
1.80714e+00 |
7.671e-02 |
Gamma |
|
1.82027e+00 |
3.035e-02 |
Gamma |
|
1.26169e+00 |
1.015e-02 |
Positron |
|
1.29638e+00 |
1.076e-02 |
Positron |
|
1.33267e+00 |
1.025e-01 |
Positron |
|
1.38086e+00 |
2.512e-02 |
Positron |
|
1.39335e+00 |
2.768e-02 |
Positron |
|
1.41475e+00 |
3.895e-02 |
Positron |
|
1.57329e+00 |
2.009e-02 |
Positron |
|
1.60762e+00 |
1.251e-02 |
Positron |
|
1.76882e+00 |
1.076e-02 |
Positron |
|
1.78887e+00 |
2.881e-02 |
Positron |
|
1.80083e+00 |
7.073e-02 |
Positron |
|
1.86206e+00 |
6.971e-02 |
Positron |
|
1.86221e+00 |
2.460e-02 |
Positron |
|
2.17646e+00 |
1.650e-01 |
Positron |
|
1.58398e-05 |
7.107e-01 |
Auger electron |
|
1.05290e-04 |
4.858e-01 |
Auger electron |
|
1.13004e-04 |
4.323e+00 |
Auger electron |
|
1.79236e-04 |
6.901e-01 |
Auger electron |
|
5.46066e-04 |
1.428e-01 |
Auger electron |
|
8.54155e-04 |
1.473e+00 |
Auger electron |
|
1.02677e-03 |
9.081e-02 |
Auger electron |
|
4.62259e-03 |
5.429e-01 |
Auger electron |
|
5.72440e-03 |
1.871e-01 |
Auger electron |
|
6.86069e-03 |
1.614e-02 |
Auger electron |
|
3.36229e-02 |
3.713e-02 |
Auger electron |
|
3.97850e-02 |
1.822e-02 |
Auger electron |
|
6.90020e-02 |
4.983e-01 |
Conversion electron |
|
1.09552e-01 |
9.207e-02 |
Conversion electron |
|
1.09945e-01 |
1.094e-02 |
Conversion electron |
|
1.10601e-01 |
1.517e-02 |
Conversion electron |
|
1.16100e-01 |
2.713e-02 |
Conversion electron |
|
2.23372e-01 |
8.383e-02 |
Conversion electron |
|
2.63922e-01 |
1.091e-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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