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Radionuclide Dosimetric Data Sheets
Gallium-74
Summary data
General
Classification
Isotope: Ga-74
Atomic number (Z): 31
Mass number (A): 74
Neutron number (N): 43
Radioactive decay
Decay modes: β-
Half-life: 8.12 [m]
Decay constant: 1.4227e-03 [1/s]
Daughters: Ge-74 (100.0%)
Radioactive daughters: None
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.99454 [MeV]
Mean photon energy: 3.15401 [MeV]
Air kerma rate constant, Γ10: 1.000e-16 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 1.000e-16 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 1.593e-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-:
1.593e-13 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 5.053e-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-74 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-74 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-74 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-74 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.21069e-05 |
1.462e-02 |
X-ray |
|
4.84900e-01 |
1.065e-02 |
Gamma |
|
4.92990e-01 |
4.957e-02 |
Gamma |
|
5.95870e-01 |
9.180e-01 |
Gamma |
|
6.04210e-01 |
2.846e-02 |
Gamma |
|
6.08400e-01 |
1.441e-01 |
Gamma |
|
8.67830e-01 |
8.721e-02 |
Gamma |
|
9.42470e-01 |
1.267e-02 |
Gamma |
|
9.60990e-01 |
1.616e-02 |
Gamma |
|
1.10132e+00 |
5.416e-02 |
Gamma |
|
1.20422e+00 |
7.619e-02 |
Gamma |
|
1.33210e+00 |
1.744e-02 |
Gamma |
|
1.33718e+00 |
1.606e-02 |
Gamma |
|
1.33718e+00 |
1.606e-02 |
Gamma |
|
1.44338e+00 |
3.672e-02 |
Gamma |
|
1.44338e+00 |
3.690e-02 |
Gamma |
|
1.48937e+00 |
2.883e-02 |
Gamma |
|
1.74490e+00 |
4.820e-02 |
Gamma |
|
1.82975e+00 |
1.900e-02 |
Gamma |
|
1.94063e+00 |
5.416e-02 |
Gamma |
|
2.01445e+00 |
1.294e-02 |
Gamma |
|
2.25706e+00 |
1.753e-02 |
Gamma |
|
2.27905e+00 |
2.341e-02 |
Gamma |
|
2.35361e+00 |
4.471e-01 |
Gamma |
|
2.58007e+00 |
1.276e-02 |
Gamma |
|
2.69096e+00 |
1.001e-02 |
Gamma |
|
2.97092e+00 |
1.083e-02 |
Gamma |
|
2.26741e-01 |
1.357e-02 |
Beta |
|
3.16355e-01 |
5.915e-02 |
Beta |
|
4.34006e-01 |
1.605e-02 |
Beta |
|
5.33112e-01 |
2.319e-02 |
Beta |
|
5.44920e-01 |
1.694e-02 |
Beta |
|
5.69419e-01 |
2.091e-02 |
Beta |
|
5.99472e-01 |
2.388e-02 |
Beta |
|
6.48086e-01 |
2.517e-02 |
Beta |
|
6.59058e-01 |
1.149e-02 |
Beta |
|
7.59081e-01 |
1.417e-02 |
Beta |
|
8.99440e-01 |
1.942e-02 |
Beta |
|
9.15939e-01 |
2.982e-02 |
Beta |
|
1.00552e+00 |
4.954e-01 |
Beta |
|
1.12633e+00 |
2.873e-02 |
Beta |
|
1.60250e+00 |
5.747e-02 |
Beta |
|
1.71491e+00 |
2.279e-02 |
Beta |
|
1.84008e+00 |
1.189e-02 |
Beta |
|
2.13434e+00 |
4.657e-02 |
Beta |
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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