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Radionuclide Dosimetric Data Sheets

Gadolinium-147

Summary data

General

Classification

Isotope:  Gd-147
Atomic number (Z):  64
Mass number (A):  147
Neutron number (N):  83

Radioactive decay

Decay modes:  β+, Electron capture
Half-life:  38.1 [h]
Decay constant:  5.0536e-06 [1/s]
Daughters:  Eu-147 (100.0%)
Radioactive daughters:  Eu-147

Dosimetric constants

Mean alpha energy:  0.0 [MeV]
Mean electron energy:  0.06166 [MeV]
Mean photon energy:  1.40302 [MeV]
Air kerma rate constant, Γ10:  5.218e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair:  5.222e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or electrons), Δwp:  9.879e-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-:  9.879e-15 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp:  2.248e-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-147 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-147 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-147 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-147 Summary Spectrum.csv

 

Energy [MeV]

Yield [#/nt] if > 0.01

Radiation type

1.42288e-05

1.136e+01

X-ray

1.02959e-03

1.510e-02

X-ray

5.83100e-03

7.212e-02

X-ray

6.45760e-03

4.627e-02

X-ray

6.82634e-03

1.208e-02

X-ray

4.09430e-02

2.668e-01

X-ray

4.15992e-02

4.811e-01

X-ray

4.69640e-02

4.856e-02

X-ray

4.70984e-02

9.395e-02

X-ray

4.82780e-02

1.058e-02

X-ray

4.83077e-02

2.053e-02

X-ray

2.16900e-01

1.290e-02

Gamma

2.29320e-01

6.313e-01

Gamma

2.40640e-01

1.539e-02

Gamma

2.61100e-01

1.976e-02

Gamma

3.09960e-01

4.212e-02

Gamma

3.18600e-01

2.184e-02

Gamma

3.46300e-01

2.132e-02

Gamma

3.70000e-01

1.716e-01

Gamma

3.96000e-01

3.432e-01

Gamma

4.84900e-01

3.016e-02

Gamma

5.59070e-01

6.448e-02

Gamma

6.10430e-01

1.591e-02

Gamma

6.19000e-01

3.609e-02

Gamma

6.25180e-01

4.680e-02

Gamma

6.32350e-01

1.706e-02

Gamma

7.55010e-01

2.070e-02

Gamma

7.65810e-01

1.134e-01

Gamma

7.75900e-01

1.102e-02

Gamma

7.76330e-01

4.368e-02

Gamma

7.78040e-01

4.950e-02

Gamma

7.82600e-01

1.196e-02

Gamma

8.61700e-01

1.747e-02

Gamma

8.93500e-01

8.112e-02

Gamma

9.29010e-01

2.018e-01

Gamma

1.00640e+00

1.362e-02

Gamma

1.06935e+00

7.176e-02

Gamma

1.13090e+00

6.448e-02

Gamma

1.23570e+00

1.154e-02

Gamma

1.58398e-05

8.048e-01

Auger electron

1.05271e-04

5.509e-01

Auger electron

1.13007e-04

4.902e+00

Auger electron

1.79245e-04

7.817e-01

Auger electron

5.45046e-04

1.596e-01

Auger electron

8.54116e-04

1.671e+00

Auger electron

1.02667e-03

1.030e-01

Auger electron

4.62160e-03

6.162e-01

Auger electron

5.72325e-03

2.123e-01

Auger electron

6.85930e-03

1.831e-02

Auger electron

3.36229e-02

4.374e-02

Auger electron

3.97850e-02

2.146e-02

Auger electron

1.80752e-01

9.865e-02

Conversion electron

2.21302e-01

1.287e-02

Conversion electron

3.47432e-01

4.428e-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

 

 

 

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