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Radionuclide Dosimetric Data Sheets
Rubidium-78
Summary data
General
Classification
Isotope: Rb-78
Atomic number (Z): 37
Mass number (A): 78
Neutron number (N): 41
Radioactive decay
Decay modes: β+, Electron capture
Half-life: 17.66 [m]
Decay constant: 6.5416e-04 [1/s]
Daughters: Kr-78 (100.0%)
Radioactive daughters: None
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 1.28892 [MeV]
Mean photon energy: 4.09184 [MeV]
Air kerma rate constant, Γ10: 9.284e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 1.273e-16 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 2.065e-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-:
2.065e-13 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 6.556e-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/Rb-78 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/Rb-78 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/Rb-78 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/Rb-78 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.93809e-05 |
7.692e-01 |
X-ray |
|
1.25517e-02 |
1.883e-02 |
X-ray |
|
1.26066e-02 |
3.631e-02 |
X-ray |
|
4.54990e-01 |
6.270e-01 |
Gamma |
|
5.11000e-01 |
1.779e+00 |
Annihilation photon |
|
5.62150e-01 |
1.141e-01 |
Gamma |
|
6.64420e-01 |
1.166e-02 |
Gamma |
|
6.92880e-01 |
1.256e-01 |
Gamma |
|
7.38660e-01 |
1.655e-02 |
Gamma |
|
8.59560e-01 |
2.840e-02 |
Gamma |
|
1.10972e+00 |
1.198e-02 |
Gamma |
|
1.14787e+00 |
7.906e-02 |
Gamma |
|
1.30083e+00 |
3.204e-02 |
Gamma |
|
1.77911e+00 |
2.959e-02 |
Gamma |
|
2.13741e+00 |
1.743e-02 |
Gamma |
|
2.24069e+00 |
1.361e-02 |
Gamma |
|
2.28966e+00 |
1.517e-02 |
Gamma |
|
2.42027e+00 |
4.602e-02 |
Gamma |
|
2.51413e+00 |
3.311e-02 |
Gamma |
|
2.89236e+00 |
2.138e-02 |
Gamma |
|
2.94140e+00 |
1.166e-02 |
Gamma |
|
2.98237e+00 |
5.192e-02 |
Gamma |
|
3.08395e+00 |
4.671e-02 |
Gamma |
|
3.43738e+00 |
4.514e-02 |
Gamma |
|
3.43816e+00 |
1.078e-01 |
Gamma |
|
3.53900e+00 |
1.818e-02 |
Gamma |
|
3.57499e+00 |
2.433e-02 |
Gamma |
|
3.89315e+00 |
3.812e-02 |
Gamma |
|
3.93750e+00 |
1.116e-02 |
Gamma |
|
9.47950e-01 |
2.671e-02 |
Positron |
|
9.70610e-01 |
3.390e-02 |
Positron |
|
9.85721e-01 |
2.054e-02 |
Positron |
|
1.01833e+00 |
3.081e-02 |
Positron |
|
1.03894e+00 |
1.633e-01 |
Positron |
|
1.06867e+00 |
2.773e-02 |
Positron |
|
1.14683e+00 |
3.687e-02 |
Positron |
|
1.18765e+00 |
2.609e-02 |
Positron |
|
1.20456e+00 |
6.676e-02 |
Positron |
|
1.25235e+00 |
1.530e-01 |
Positron |
|
1.34995e+00 |
1.613e-02 |
Positron |
|
1.62280e+00 |
1.027e-02 |
Positron |
|
1.72449e+00 |
2.434e-02 |
Positron |
|
1.82164e+00 |
1.397e-02 |
Positron |
|
2.35080e+00 |
3.287e-02 |
Positron |
|
2.41193e+00 |
2.054e-02 |
Positron |
|
2.68320e+00 |
2.465e-02 |
Positron |
|
2.90765e+00 |
8.217e-02 |
Positron |
|
5.62891e-05 |
3.363e-01 |
Auger electron |
|
6.55309e-05 |
1.323e-01 |
Auger electron |
|
9.99031e-05 |
2.501e-02 |
Auger electron |
|
1.40733e-03 |
1.174e-01 |
Auger electron |
|
1.07980e-02 |
2.685e-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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