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Radionuclide Dosimetric Data Sheets
Germanium-67
Summary data
General
Classification
Isotope: Ge-67
Atomic number (Z): 32
Mass number (A): 67
Neutron number (N): 35
Radioactive decay
Decay modes: β+, Electron capture
Half-life: 18.9 [m]
Decay constant: 6.1124e-04 [1/s]
Daughters: Ga-67 (100.0%)
Radioactive daughters: Ga-67
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 1.16881 [MeV]
Mean photon energy: 1.42541 [MeV]
Air kerma rate constant, Γ10: 1.600e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 5.199e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 1.873e-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-:
1.873e-13 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 2.284e-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/Ge-67 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/Ge-67 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/Ge-67 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/Ge-67 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.57866e-05 |
5.318e-01 |
X-ray |
|
9.18060e-03 |
1.135e-02 |
X-ray |
|
9.20900e-03 |
2.206e-02 |
X-ray |
|
1.67010e-01 |
8.428e-01 |
Gamma |
|
3.59500e-01 |
1.470e-02 |
Gamma |
|
5.11000e-01 |
1.860e+00 |
Annihilation photon |
|
7.28700e-01 |
2.352e-02 |
Gamma |
|
8.28300e-01 |
2.989e-02 |
Gamma |
|
9.11200e-01 |
3.087e-02 |
Gamma |
|
9.14800e-01 |
3.038e-02 |
Gamma |
|
9.81300e-01 |
1.127e-02 |
Gamma |
|
1.08130e+00 |
1.029e-02 |
Gamma |
|
1.47280e+00 |
4.900e-02 |
Gamma |
|
1.80940e+00 |
1.323e-02 |
Gamma |
|
6.04961e-01 |
4.221e-02 |
Positron |
|
6.81639e-01 |
7.722e-02 |
Positron |
|
9.38003e-01 |
3.604e-02 |
Positron |
|
1.05599e+00 |
1.030e-02 |
Positron |
|
1.36766e+00 |
7.619e-01 |
Positron |
|
1.17412e-05 |
1.462e-01 |
Auger electron |
|
5.44315e-05 |
1.340e-01 |
Auger electron |
|
9.44182e-05 |
2.012e-02 |
Auger electron |
|
1.00289e-03 |
1.061e-01 |
Auger electron |
|
7.99646e-03 |
2.968e-02 |
Auger electron |
|
1.56677e-01 |
1.365e-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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