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Radionuclide Dosimetric Data Sheets
Gadolinium-151
Summary data
General
Classification
Isotope: Gd-151
Atomic number (Z): 64
Mass number (A): 151
Neutron number (N): 87
Radioactive decay
Decay modes: α, Electron capture
Half-life: 124.0 [d]
Decay constant: 6.4698e-08 [1/s]
Daughters: Sm-147 (1e-06%), Eu-151 (100.0%)
Radioactive daughters: Sm-147
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.03937 [MeV]
Mean photon energy: 0.07077 [MeV]
Air kerma rate constant, Γ10: 4.115e-18 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 4.115e-18 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 6.308e-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-:
6.308e-15 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 1.134e-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-151 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-151 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-151 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.42708e-05 |
1.878e+01 |
X-ray |
|
1.03413e-03 |
2.356e-02 |
X-ray |
|
5.80160e-03 |
1.047e-02 |
X-ray |
|
5.83100e-03 |
9.263e-02 |
X-ray |
|
6.41408e-03 |
1.675e-02 |
X-ray |
|
6.45761e-03 |
6.664e-02 |
X-ray |
|
6.54849e-03 |
2.417e-02 |
X-ray |
|
6.82634e-03 |
1.552e-02 |
X-ray |
|
7.47704e-03 |
1.152e-02 |
X-ray |
|
2.15170e-02 |
2.852e-02 |
Gamma |
|
4.09430e-02 |
2.366e-01 |
X-ray |
|
4.15992e-02 |
4.268e-01 |
X-ray |
|
4.69640e-02 |
4.308e-02 |
X-ray |
|
4.70984e-02 |
8.334e-02 |
X-ray |
|
4.83077e-02 |
1.821e-02 |
X-ray |
|
1.53600e-01 |
6.200e-02 |
Gamma |
|
1.74700e-01 |
2.964e-02 |
Gamma |
|
2.43290e-01 |
5.599e-02 |
Gamma |
|
3.07500e-01 |
1.035e-02 |
Gamma |
|
1.58398e-05 |
1.359e+00 |
Auger electron |
|
3.88900e-05 |
1.076e-02 |
Auger electron |
|
1.07883e-04 |
9.183e-01 |
Auger electron |
|
1.12789e-04 |
8.121e+00 |
Auger electron |
|
1.80062e-04 |
1.390e+00 |
Auger electron |
|
5.71967e-04 |
4.871e-01 |
Auger electron |
|
8.57626e-04 |
2.593e+00 |
Auger electron |
|
1.03559e-03 |
1.617e-01 |
Auger electron |
|
4.71194e-03 |
9.519e-01 |
Auger electron |
|
5.82401e-03 |
3.297e-01 |
Auger electron |
|
6.97583e-03 |
2.867e-02 |
Auger electron |
|
1.34989e-02 |
5.415e-01 |
Conversion electron |
|
1.38922e-02 |
6.603e-02 |
Conversion electron |
|
1.45482e-02 |
3.265e-02 |
Conversion electron |
|
2.00474e-02 |
1.395e-01 |
Conversion electron |
|
2.15170e-02 |
3.869e-02 |
Conversion electron |
|
3.36229e-02 |
3.880e-02 |
Auger electron |
|
3.97850e-02 |
1.904e-02 |
Auger electron |
|
1.05032e-01 |
2.921e-02 |
Conversion electron |
|
1.26132e-01 |
5.629e-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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