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Radionuclide Dosimetric Data Sheets
Radium-223
Summary data
General
Classification
Isotope: Ra-223
Atomic number (Z): 88
Mass number (A): 223
Neutron number (N): 135
Radioactive decay
Decay modes: α
Half-life: 11.43 [d]
Decay constant: 7.0188e-07 [1/s]
Daughters: Rn-219 (100.0%)
Radioactive daughters: Rn-219
Dosimetric constants
Mean alpha energy: 5.7701 [MeV]
Mean electron energy: 0.07809 [MeV]
Mean photon energy: 0.14126 [MeV]
Air kerma rate constant, Γ10: 1.315e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 1.315e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 9.370e-13 [Gy·kg/Bq·s]
Equilibrium dose constant for alphas, Δα: 9.245e-13
[Gy·kg/Bq·s]
Equilibrium dose constant for betas/electrons, Δβ-,β+,e-:
1.251e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 2.263e-14
[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/Ra-223 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/Ra-223 Summary 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/Ra-223 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
5.00854e-05 |
1.474e+01 |
X-ray |
|
2.72889e-03 |
6.209e-02 |
X-ray |
|
1.15974e-02 |
1.125e-02 |
X-ray |
|
1.17297e-02 |
9.899e-02 |
X-ray |
|
1.40892e-02 |
1.976e-02 |
X-ray |
|
1.43744e-02 |
6.573e-02 |
X-ray |
|
1.68365e-02 |
1.402e-02 |
X-ray |
|
8.13680e-02 |
1.573e-01 |
X-ray |
|
8.41450e-02 |
2.594e-01 |
X-ray |
|
9.46165e-02 |
2.933e-02 |
X-ray |
|
9.52461e-02 |
5.699e-02 |
X-ray |
|
9.79846e-02 |
1.418e-02 |
X-ray |
|
1.22319e-01 |
1.209e-02 |
Gamma |
|
1.44235e-01 |
3.266e-02 |
Gamma |
|
1.54208e-01 |
5.699e-02 |
Gamma |
|
2.69463e-01 |
1.390e-01 |
Gamma |
|
3.23871e-01 |
3.989e-02 |
Gamma |
|
3.38282e-01 |
2.836e-02 |
Gamma |
|
4.45033e-01 |
1.293e-02 |
Gamma |
|
3.68716e-05 |
3.861e+00 |
Auger electron |
|
1.14978e-04 |
4.294e+00 |
Auger electron |
|
1.27034e-04 |
1.379e-02 |
Auger electron |
|
1.81646e-04 |
2.438e+00 |
Auger electron |
|
4.70974e-04 |
8.035e-01 |
Auger electron |
|
8.82101e-04 |
4.117e-01 |
Conversion electron |
|
1.27071e-03 |
9.685e-02 |
Auger electron |
|
2.15205e-03 |
1.207e+00 |
Auger electron |
|
2.50810e-03 |
1.863e-01 |
Auger electron |
|
3.00387e-03 |
1.033e-02 |
Auger electron |
|
4.40000e-03 |
1.332e-01 |
Conversion electron |
|
6.48210e-03 |
1.060e-01 |
Conversion electron |
|
8.86813e-03 |
2.065e-01 |
Auger electron |
|
1.00000e-02 |
3.520e-02 |
Conversion electron |
|
1.08821e-02 |
7.061e-02 |
Conversion electron |
|
1.16006e-02 |
9.720e-02 |
Auger electron |
|
1.43617e-02 |
1.086e-02 |
Auger electron |
|
1.44000e-02 |
2.324e-02 |
Conversion electron |
|
2.35550e-02 |
7.603e-02 |
Conversion electron |
|
4.54710e-02 |
1.288e-01 |
Conversion electron |
|
5.54440e-02 |
1.886e-01 |
Conversion electron |
|
5.98710e-02 |
2.061e-02 |
Conversion electron |
|
6.51076e-02 |
1.225e-02 |
Auger electron |
|
1.04277e-01 |
1.239e-02 |
Conversion electron |
|
1.26193e-01 |
2.095e-02 |
Conversion electron |
|
1.36166e-01 |
3.060e-02 |
Conversion electron |
|
1.70699e-01 |
9.458e-02 |
Conversion electron |
|
2.25107e-01 |
1.627e-02 |
Conversion electron |
|
2.39518e-01 |
1.056e-02 |
Conversion electron |
|
2.51421e-01 |
1.525e-02 |
Conversion electron |
|
5.43494e+00 |
2.220e-02 |
Alpha |
|
5.50247e+00 |
1.000e-02 |
Alpha |
|
5.53978e+00 |
9.002e-02 |
Alpha |
|
5.60734e+00 |
2.520e-01 |
Alpha |
|
5.71619e+00 |
5.161e-01 |
Alpha |
|
5.74748e+00 |
9.002e-02 |
Alpha |
|
5.87198e+00 |
1.000e-02 |
Alpha |
|
9.93328e-02 |
2.220e-02 |
Alpha recoil |
|
1.00567e-01 |
1.000e-02 |
Alpha recoil |
|
1.01249e-01 |
9.002e-02 |
Alpha recoil |
|
1.02484e-01 |
2.520e-01 |
Alpha recoil |
|
1.04473e-01 |
5.161e-01 |
Alpha recoil |
|
1.05045e-01 |
9.002e-02 |
Alpha recoil |
|
1.07320e-01 |
1.000e-02 |
Alpha recoil |
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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