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Radionuclide Dosimetric Data Sheets
Gadolinium-142
Summary data
General
Classification
Isotope: Gd-142
Atomic number (Z): 64
Mass number (A): 142
Neutron number (N): 78
Radioactive decay
Decay modes: β+, Electron capture
Half-life: 70.2 [s]
Decay constant: 9.8739e-03 [1/s]
Daughters: Eu-142 (100.0%)
Radioactive daughters: Eu-142
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.73904 [MeV]
Mean photon energy: 1.04316 [MeV]
Air kerma rate constant, Γ10: 1.806e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 3.841e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 1.184e-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-:
1.184e-13 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 1.671e-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-142 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-142 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-142 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-142 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.42268e-05 |
4.731e+00 |
X-ray |
|
5.83100e-03 |
3.032e-02 |
X-ray |
|
6.45760e-03 |
1.941e-02 |
X-ray |
|
4.09430e-02 |
1.129e-01 |
X-ray |
|
4.15992e-02 |
2.035e-01 |
X-ray |
|
4.69640e-02 |
2.054e-02 |
X-ray |
|
4.70984e-02 |
3.975e-02 |
X-ray |
|
1.78900e-01 |
1.120e-01 |
Gamma |
|
2.22800e-01 |
1.613e-02 |
Gamma |
|
2.80300e-01 |
4.021e-02 |
Gamma |
|
2.84400e-01 |
6.160e-02 |
Gamma |
|
5.11000e-01 |
1.051e+00 |
Annihilation photon |
|
5.26200e-01 |
5.902e-02 |
Gamma |
|
5.91300e-01 |
1.098e-02 |
Gamma |
|
6.14500e-01 |
1.456e-02 |
Gamma |
|
6.19700e-01 |
2.050e-02 |
Gamma |
|
6.31700e-01 |
1.064e-02 |
Gamma |
|
8.23900e-01 |
1.210e-02 |
Gamma |
|
1.00020e+00 |
1.568e-02 |
Gamma |
|
1.23390e+00 |
1.680e-02 |
Gamma |
|
1.25960e+00 |
4.278e-02 |
Gamma |
|
1.43840e+00 |
1.232e-02 |
Gamma |
|
1.59970e+00 |
2.016e-02 |
Gamma |
|
1.77910e+00 |
2.475e-02 |
Gamma |
|
1.94860e+00 |
1.008e-02 |
Gamma |
|
8.57125e-01 |
1.900e-02 |
Positron |
|
1.27188e+00 |
3.300e-02 |
Positron |
|
1.38318e+00 |
2.200e-02 |
Positron |
|
1.51474e+00 |
3.400e-01 |
Positron |
|
1.58398e-05 |
3.348e-01 |
Auger electron |
|
1.05142e-04 |
2.293e-01 |
Auger electron |
|
1.13017e-04 |
2.041e+00 |
Auger electron |
|
1.79215e-04 |
3.242e-01 |
Auger electron |
|
5.42795e-04 |
6.412e-02 |
Auger electron |
|
8.53954e-04 |
6.979e-01 |
Auger electron |
|
1.02625e-03 |
4.300e-02 |
Auger electron |
|
4.61819e-03 |
2.575e-01 |
Auger electron |
|
5.71941e-03 |
8.868e-02 |
Auger electron |
|
3.36229e-02 |
1.850e-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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