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Radionuclide Dosimetric Data Sheets
Gallium-66
Summary data
General
Classification
Isotope: Ga-66
Atomic number (Z): 31
Mass number (A): 66
Neutron number (N): 35
Radioactive decay
Decay modes: β+, Electron capture
Half-life: 9.49 [h]
Decay constant: 2.0289e-05 [1/s]
Daughters: Zn-66 (100.0%)
Radioactive daughters: None
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.96337 [MeV]
Mean photon energy: 2.49436 [MeV]
Air kerma rate constant, Γ10: 5.529e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 7.668e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 1.543e-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-:
1.543e-13 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 3.996e-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/Ga-66 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/Ga-66 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/Ga-66 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/Ga-66 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.63537e-05 |
2.105e+00 |
X-ray |
|
8.57190e-03 |
5.561e-02 |
X-ray |
|
8.59639e-03 |
1.083e-01 |
X-ray |
|
9.53181e-03 |
1.345e-02 |
X-ray |
|
5.11000e-01 |
1.105e+00 |
Annihilation photon |
|
8.33537e-01 |
5.886e-02 |
Gamma |
|
1.03923e+00 |
3.690e-01 |
Gamma |
|
1.33312e+00 |
1.203e-02 |
Gamma |
|
1.91834e+00 |
2.085e-02 |
Gamma |
|
2.18963e+00 |
5.579e-02 |
Gamma |
|
2.42254e+00 |
1.922e-02 |
Gamma |
|
2.75185e+00 |
2.328e-01 |
Gamma |
|
3.22882e+00 |
1.546e-02 |
Gamma |
|
3.38088e+00 |
1.491e-02 |
Gamma |
|
3.79104e+00 |
1.111e-02 |
Gamma |
|
4.08588e+00 |
1.299e-02 |
Gamma |
|
4.29522e+00 |
4.041e-02 |
Gamma |
|
4.80606e+00 |
1.815e-02 |
Gamma |
|
3.97138e-01 |
3.760e-02 |
Positron |
|
1.90338e+00 |
4.934e-01 |
Positron |
|
5.67733e-05 |
7.623e-01 |
Auger electron |
|
8.98675e-05 |
1.075e-01 |
Auger electron |
|
9.29549e-04 |
5.720e-01 |
Auger electron |
|
7.48697e-03 |
1.659e-01 |
Auger electron |
|
8.45549e-03 |
4.235e-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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