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Radionuclide Dosimetric Data Sheets
Gadolinium-144
Summary data
General
Classification
Isotope: Gd-144
Atomic number (Z): 64
Mass number (A): 144
Neutron number (N): 80
Radioactive decay
Decay modes: β+, Electron capture
Half-life: 4.47 [m]
Decay constant: 2.5844e-03 [1/s]
Daughters: Eu-144 (100.0%)
Radioactive daughters: Eu-144
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.58582 [MeV]
Mean photon energy: 0.9086 [MeV]
Air kerma rate constant, Γ10: 1.455e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 3.213e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 9.386e-14 [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-:
9.386e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 1.456e-13
[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/Gd-144 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-144 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-144 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.42283e-05 |
5.299e+00 |
X-ray |
|
5.83100e-03 |
3.371e-02 |
X-ray |
|
6.45760e-03 |
2.159e-02 |
X-ray |
|
4.09430e-02 |
1.248e-01 |
X-ray |
|
4.15992e-02 |
2.251e-01 |
X-ray |
|
4.69640e-02 |
2.272e-02 |
X-ray |
|
4.70984e-02 |
4.397e-02 |
X-ray |
|
3.33300e-01 |
5.935e-02 |
Gamma |
|
3.47100e-01 |
1.656e-02 |
Gamma |
|
5.11000e-01 |
9.080e-01 |
Annihilation photon |
|
6.29500e-01 |
1.923e-02 |
Gamma |
|
8.68100e-01 |
1.009e-02 |
Gamma |
|
2.43260e+00 |
5.626e-02 |
Gamma |
|
2.47130e+00 |
1.246e-02 |
Gamma |
|
1.28490e+00 |
4.381e-01 |
Positron |
|
1.58398e-05 |
3.753e-01 |
Auger electron |
|
1.05245e-04 |
2.569e-01 |
Auger electron |
|
1.13009e-04 |
2.286e+00 |
Auger electron |
|
1.79228e-04 |
3.642e-01 |
Auger electron |
|
5.44809e-04 |
7.414e-02 |
Auger electron |
|
8.54074e-04 |
7.799e-01 |
Auger electron |
|
1.02657e-03 |
4.808e-02 |
Auger electron |
|
4.62106e-03 |
2.877e-01 |
Auger electron |
|
5.72265e-03 |
9.911e-02 |
Auger electron |
|
3.36229e-02 |
2.047e-02 |
Auger electron |
|
3.97850e-02 |
1.004e-02 |
Auger 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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