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Radionuclide Dosimetric Data Sheets
Gadolinium-146
Summary data
General
Classification
Isotope: Gd-146
Atomic number (Z): 64
Mass number (A): 146
Neutron number (N): 82
Radioactive decay
Decay modes: Electron capture
Half-life: 48.27 [d]
Decay constant: 1.6620e-07 [1/s]
Daughters: Eu-146 (100.0%)
Radioactive daughters: Eu-146
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.12735 [MeV]
Mean photon energy: 0.25262 [MeV]
Air kerma rate constant, Γ10: 1.121e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 1.121e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 2.040e-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-:
2.040e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 4.047e-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/Gd-146 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-146 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/Gd-146 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.42276e-05 |
2.227e+01 |
X-ray |
|
1.02940e-03 |
2.967e-02 |
X-ray |
|
5.19190e-03 |
1.188e-02 |
X-ray |
|
5.80160e-03 |
1.609e-02 |
X-ray |
|
5.83100e-03 |
1.423e-01 |
X-ray |
|
6.45760e-03 |
9.143e-02 |
X-ray |
|
6.54849e-03 |
1.152e-02 |
X-ray |
|
6.82634e-03 |
2.384e-02 |
X-ray |
|
7.47704e-03 |
1.580e-02 |
X-ray |
|
4.09430e-02 |
5.282e-01 |
X-ray |
|
4.15992e-02 |
9.525e-01 |
X-ray |
|
4.69640e-02 |
9.614e-02 |
X-ray |
|
4.70984e-02 |
1.860e-01 |
X-ray |
|
4.82780e-02 |
2.095e-02 |
X-ray |
|
4.83077e-02 |
4.064e-02 |
X-ray |
|
1.14710e-01 |
4.385e-01 |
Gamma |
|
1.15510e-01 |
4.424e-01 |
Gamma |
|
1.54570e-01 |
4.498e-01 |
Gamma |
|
1.58398e-05 |
1.577e+00 |
Auger electron |
|
3.88901e-05 |
1.249e-02 |
Auger electron |
|
1.05156e-04 |
1.080e+00 |
Auger electron |
|
1.13016e-04 |
9.608e+00 |
Auger electron |
|
1.79243e-04 |
1.527e+00 |
Auger electron |
|
5.43402e-04 |
3.056e-01 |
Auger electron |
|
8.53984e-04 |
3.284e+00 |
Auger electron |
|
1.02632e-03 |
2.023e-01 |
Auger electron |
|
4.61954e-03 |
1.212e+00 |
Auger electron |
|
5.72091e-03 |
4.174e-01 |
Auger electron |
|
6.85652e-03 |
3.600e-02 |
Auger electron |
|
3.36229e-02 |
8.659e-02 |
Auger electron |
|
3.97850e-02 |
4.250e-02 |
Auger electron |
|
6.61420e-02 |
4.746e-01 |
Conversion electron |
|
6.69420e-02 |
4.695e-01 |
Conversion electron |
|
1.06002e-01 |
2.098e-01 |
Conversion electron |
|
1.06692e-01 |
6.229e-02 |
Conversion electron |
|
1.07492e-01 |
6.161e-02 |
Conversion electron |
|
1.13240e-01 |
1.473e-02 |
Conversion electron |
|
1.14040e-01 |
1.459e-02 |
Conversion electron |
|
1.46552e-01 |
2.738e-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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