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Radionuclide Dosimetric Data Sheets
Strontium-79
Summary data
General
Classification
Isotope: Sr-79
Atomic number (Z): 38
Mass number (A): 79
Neutron number (N): 41
Radioactive decay
Decay modes: β+, Electron capture
Half-life: 2.25 [m]
Decay constant: 5.1344e-03 [1/s]
Daughters: Rb-79 (100.0%)
Radioactive daughters: Rb-79
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 1.85724 [MeV]
Mean photon energy: 1.18008 [MeV]
Air kerma rate constant, Γ10: 1.545e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 5.333e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 2.976e-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-:
2.976e-13 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 1.891e-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/Sr-79 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/Sr-79 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/Sr-79 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/Sr-79 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.52803e-05 |
4.160e+00 |
X-ray |
|
1.32919e-02 |
7.953e-02 |
X-ray |
|
1.33539e-02 |
1.530e-01 |
X-ray |
|
1.49123e-02 |
1.140e-02 |
X-ray |
|
1.49217e-02 |
2.223e-02 |
X-ray |
|
3.94100e-02 |
2.800e-01 |
Gamma |
|
1.05000e-01 |
2.184e-01 |
Gamma |
|
1.34870e-01 |
3.080e-02 |
Gamma |
|
1.40920e-01 |
4.480e-02 |
Gamma |
|
1.44410e-01 |
3.080e-02 |
Gamma |
|
2.18980e-01 |
5.880e-02 |
Gamma |
|
2.45800e-01 |
3.080e-02 |
Gamma |
|
3.08900e-01 |
1.288e-02 |
Gamma |
|
3.17760e-01 |
5.040e-02 |
Gamma |
|
3.24030e-01 |
5.320e-02 |
Gamma |
|
3.66340e-01 |
2.240e-02 |
Gamma |
|
4.13800e-01 |
7.560e-02 |
Gamma |
|
5.11000e-01 |
1.957e+00 |
Annihilation photon |
|
6.12500e-01 |
4.760e-02 |
Gamma |
|
1.66184e+00 |
6.851e-02 |
Positron |
|
1.75696e+00 |
8.808e-02 |
Positron |
|
1.79978e+00 |
1.077e-01 |
Positron |
|
1.80277e+00 |
4.893e-02 |
Positron |
|
1.83722e+00 |
4.893e-02 |
Positron |
|
1.89053e+00 |
2.936e-02 |
Positron |
|
1.90488e+00 |
1.566e-01 |
Positron |
|
1.95537e+00 |
2.251e-01 |
Positron |
|
1.97433e+00 |
2.055e-01 |
Positron |
|
1.26043e-05 |
1.219e+00 |
Auger electron |
|
6.49674e-05 |
1.223e+00 |
Auger electron |
|
7.35706e-05 |
4.937e-01 |
Auger electron |
|
9.22274e-05 |
2.179e-02 |
Auger electron |
|
1.05430e-04 |
9.185e-02 |
Auger electron |
|
1.48922e-03 |
4.646e-01 |
Auger electron |
|
1.61059e-03 |
3.759e-02 |
Auger electron |
|
1.14024e-02 |
1.014e-01 |
Auger electron |
|
1.30522e-02 |
3.327e-02 |
Auger electron |
|
2.42510e-02 |
3.563e-01 |
Conversion electron |
|
3.73620e-02 |
3.118e-02 |
Conversion electron |
|
8.98410e-02 |
2.463e-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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