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Radionuclide Dosimetric Data Sheets
Gadolinium-159
Summary data
General
Classification
Isotope: Gd-159
Atomic number (Z): 64
Mass number (A): 159
Neutron number (N): 95
Radioactive decay
Decay modes: β-
Half-life: 18.48 [h]
Decay constant: 1.0419e-05 [1/s]
Daughters: Tb-159 (100.0%)
Radioactive daughters: None
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.30958 [MeV]
Mean photon energy: 0.05388 [MeV]
Air kerma rate constant, Γ10: 2.235e-18 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 2.235e-18 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 4.960e-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-:
4.960e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 8.633e-15
[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-159 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-159 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-159 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-159 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.38202e-05 |
2.144e+00 |
X-ray |
|
6.26069e-03 |
1.616e-02 |
X-ray |
|
6.98190e-03 |
1.076e-02 |
X-ray |
|
4.37992e-02 |
5.395e-02 |
X-ray |
|
4.45546e-02 |
9.670e-02 |
X-ray |
|
5.04632e-02 |
1.913e-02 |
X-ray |
|
5.79998e-02 |
2.155e-02 |
Gamma |
|
3.63543e-01 |
1.140e-01 |
Gamma |
|
1.88899e-01 |
1.195e-01 |
Beta |
|
3.04026e-01 |
2.589e-01 |
Beta |
|
3.26851e-01 |
6.173e-01 |
Beta |
|
1.73725e-05 |
1.276e-01 |
Auger electron |
|
1.22027e-04 |
9.790e-01 |
Auger electron |
|
1.35122e-04 |
6.026e-02 |
Auger electron |
|
1.97321e-04 |
1.542e-01 |
Auger electron |
|
6.16293e-04 |
2.980e-02 |
Auger electron |
|
9.60719e-04 |
3.332e-01 |
Auger electron |
|
1.13571e-03 |
1.892e-02 |
Auger electron |
|
4.94887e-03 |
1.205e-01 |
Auger electron |
|
5.93980e-03 |
1.974e-01 |
Conversion electron |
|
6.15614e-03 |
4.211e-02 |
Auger electron |
|
4.93267e-02 |
2.635e-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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